mirror of
https://github.com/xcp-ng/xenadmin.git
synced 2024-12-18 14:40:07 +01:00
abd198e1eb
The error occurred when user specified a second wrong password. If the same wrong password was specified again and again, it didn't trigger it. This was due to an error in code where we didn't use the updated password in the second connection attempt. Fixed by changing the code to use the updated username and password combination for every login attempt. Signed-off-by: Mihaela Stoica <mihaela.stoica@citrix.com>
2160 lines
84 KiB
C#
2160 lines
84 KiB
C#
/* Copyright (c) Citrix Systems Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Globalization;
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using System.Net;
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using System.Reflection;
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using System.Threading;
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using CookComputing.XmlRpc;
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using XenAdmin.Actions;
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using XenAdmin.Core;
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using XenAdmin.ServerDBs;
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using XenAPI;
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using System.Diagnostics;
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using System.Xml.Serialization;
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namespace XenAdmin.Network
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{
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[DebuggerDisplay("IXenConnection :{HostnameWithPort}")]
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public class XenConnection : IXenConnection,IXmlSerializable
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{
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private static readonly log4net.ILog log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
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public string Hostname { get; set; }
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public int Port { get; set; }
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public string Username { get; set; }
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public string Password { get; set; }
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public string FriendlyName { get; set; }
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/// <summary>
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/// The last known name for the pool, in the form "'Pool friendly name' (hostname or IP)".
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/// </summary>
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public string LastConnectionFullName = "";
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/// <summary>
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/// Whether this connection is saved in a disconnected state (i.e. don't reconnect on session restore).
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/// </summary>
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public bool SaveDisconnected { get; set; }
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/// <summary>
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/// Indicates whether this connection was created in the Add Server dialog.
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/// </summary>
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public bool fromDialog = false;
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/// <summary>
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/// Whether we're expecting network disruption, say because we're reconfiguring the network at this time. In that case, we ignore
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/// keepalive failures, and expect task polling to be disrupted.
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/// </summary>
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private volatile bool _expectedDisruption = false;
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public bool ExpectDisruption { get { return _expectedDisruption; } set { _expectedDisruption = value; } }
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/// <summary>
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/// If we are 'expecting' this connection's Password property to contain the correct password
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/// (i.e. false if the user has just entered the password, true if it was restored from the saved session).
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/// </summary>
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public bool ExpectPasswordIsCorrect { get; set; }
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/// <summary>
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/// Used by the patch wizard, supress any errors coming from reconnect attempts
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/// </summary>
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private volatile bool _supressErrors = false;
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public bool SupressErrors { get { return _supressErrors; } set { _supressErrors = value; } }
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/// <summary>
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/// Indicates whether we are expecting the pool master to change soon (e.g. when explicitly designating a new master).
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/// </summary>
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private volatile bool _masterMayChange = false;
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public bool MasterMayChange { get { return _masterMayChange; } set { _masterMayChange = value; } }
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/// <summary>
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/// Set when we detect that Event.next() has become blocked and we need to reset the connection. See CA-33145.
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/// </summary>
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private bool EventNextBlocked = false;
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/// <summary>
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/// A cache of the pool's opaque_ref, last time this connection was connected. This will be
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/// Helper.NullOpaqueRef if it's never been connected.
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/// </summary>
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private string PoolOpaqueRef = Helper.NullOpaqueRef;
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/// <summary>
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/// Set after a successful connection attempt, before the cache is populated.
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/// </summary>
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private string MasterIPAddress = "";
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/// <summary>
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/// The lock that must be taken around connectTask and monitor.
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/// </summary>
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private readonly object connectTaskLock = new object();
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private ConnectTask connectTask = null;
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private Heartbeat heartbeat = null;
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/// <summary>
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/// Whether the connection is restricted by license. This only is valid if CacheIsPopulated is false.
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/// See IsRestricted.
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/// </summary>
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private bool Restricted = false;
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/// <summary>
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/// Whether we are trying to automatically connect to the new master. Set in HandleConnectionLost.
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/// Note: I think we are not using this correctly -- see CA-37864 for details -- but I'm not going
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/// to fix it unless it gives rise to a reported bug, because I can't test the fix.
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/// </summary>
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private volatile bool FindingNewMaster = false;
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/// <summary>
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/// The time at which we started looking for the new master.
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/// </summary>
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private DateTime FindingNewMasterStartedAt = DateTime.MinValue;
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/// <summary>
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/// Timeout before we consider that Event.next() has got blocked: see CA-33145
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/// </summary>
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private const int EVENT_NEXT_TIMEOUT = 120 * 1000; // 2 minutes
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private string LastMasterHostname = "";
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public readonly object PoolMembersLock = new object();
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private List<string> _poolMembers = new List<string>();
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public List<string> PoolMembers { get { return _poolMembers; } set { _poolMembers = value; } }
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private int PoolMemberIndex = 0;
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private System.Threading.Timer ReconnectionTimer = null;
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private ActionBase ConnectAction;
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private DateTime m_startTime = DateTime.MinValue;
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private int m_lastDebug;
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private TimeSpan ServerTimeOffset_ = TimeSpan.Zero;
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private object ServerTimeOffsetLock = new object();
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/// <summary>
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/// The offset between the clock at the client and the clock at the server. server time + ServerTimeOffset = client time.
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/// This does not take the local timezone into account -- all calculations should be in UTC.
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/// For Orlando and greater, this value is set by XenMetricsMonitor, calling Host.get_servertime on a heartbeat.
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/// </summary>
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public TimeSpan ServerTimeOffset
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{
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get
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{
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lock (ServerTimeOffsetLock)
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{
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return ServerTimeOffset_;
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}
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}
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set
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{
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lock (ServerTimeOffsetLock)
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{
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TimeSpan diff = ServerTimeOffset_ - value;
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if (diff.TotalSeconds < -1 || 1 < diff.TotalSeconds)
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{
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var now = DateTime.UtcNow;
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var debugMsg = string.Format("Time offset for {0} is now {1}. It's now {2} UTC here, and {3} UTC on the server.",
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Hostname, value,
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now.ToString("o", CultureInfo.InvariantCulture),
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(now.Subtract(value)).ToString("o", CultureInfo.InvariantCulture));
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if (m_startTime.Ticks == 0)//log it the first time it is detected
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{
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m_startTime = now;
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log.Debug(debugMsg);
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}
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//then log every 5mins
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int currDebug = (int)((now - m_startTime).TotalSeconds) / 300;
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if (currDebug > m_lastDebug)
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{
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m_lastDebug = currDebug;
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log.DebugFormat(debugMsg);
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}
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}
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ServerTimeOffset_ = value;
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}
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if (TimeSkewUpdated != null)
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TimeSkewUpdated(this, EventArgs.Empty);
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}
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}
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public string HostnameWithPort
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{
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get
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{
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return Port == ConnectionsManager.DEFAULT_XEN_PORT ? Hostname : Hostname + ':' + Port.ToString();
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}
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}
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public string UriScheme
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{
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get
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{
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return Port == 8080 || Port == 80 ? Uri.UriSchemeHttp : Uri.UriSchemeHttps;
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}
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}
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public string Version { get; set; }
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public string Name
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{
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get
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{
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string result = Helpers.GetName(Helpers.GetPoolOfOne(this));
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return !string.IsNullOrEmpty(result)
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? result
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: !string.IsNullOrEmpty(FriendlyName) ? FriendlyName : Hostname;
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}
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}
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/// <summary>
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/// The cache of XenAPI objects for this connection.
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/// </summary>
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private readonly ICache _cache = new Cache();
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public ICache Cache { get { return _cache; } }
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private readonly LockFreeQueue<ObjectChange> eventQueue = new LockFreeQueue<ObjectChange>();
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private readonly System.Threading.Timer cacheUpdateTimer;
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/// <summary>
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/// Whether the cache for this connection has been populated.
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/// </summary>
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private bool cacheIsPopulated = false;
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public bool CacheIsPopulated
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{
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get { return cacheIsPopulated; }
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}
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/// <summary>
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/// Whether the connection is restricted by license -- i.e. whether one of the hosts in this pool
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/// is XenExpress. This uses the cache if that has been populated, but for the short time between
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/// connections and the cache being populated, it uses the Restricted flag.
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/// </summary>
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private bool IsRestricted
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{
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get
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{
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if (cacheIsPopulated)
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{
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foreach (XenAPI.Host h in Cache.Hosts)
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{
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if (h.RestrictConnection)
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return true;
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}
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return false;
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}
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return Restricted;
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}
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}
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private bool cacheUpdaterRunning = false;
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private bool updatesWaiting = false;
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/// <summary>
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/// Initializes a new instance of the <see cref="XenConnection"/> class.
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/// </summary>
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public XenConnection()
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{
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Port = ConnectionsManager.DEFAULT_XEN_PORT;
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Username = "root";
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SaveDisconnected = false;
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ExpectPasswordIsCorrect = true;
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cacheUpdateTimer = new System.Threading.Timer(cacheUpdater);
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}
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/// <summary>
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/// Used by the automated tests. Initializes a new instance of the <see cref="XenConnection"/> class.
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/// <param name="hostname"></param>
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/// <param name="friendlyName"></param>
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/// </summary>
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public XenConnection(string hostname, string friendlyName)
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: this()
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{
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this.Hostname = hostname;
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this.FriendlyName = friendlyName;
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this.Port = 443;
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this.SaveDisconnected = true;
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}
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/// <summary>
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/// For use by unit tests only.
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/// </summary>
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/// <param name="user"></param>
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/// <param name="password"></param>
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/// <returns></returns>
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public Session Connect(string user, string password)
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{
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heartbeat = new Heartbeat(this, XenAdminConfigManager.Provider.ConnectionTimeout);
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Session session = SessionFactory.CreateSession(this, Hostname, Port);
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try
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{
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session.login_with_password(user, password, API_Version.LATEST);
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// this is required so connection.IsConnected returns true in the unit tests.
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connectTask = new ConnectTask("test", 0);
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connectTask.Connected = true;
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connectTask.Session = session;
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return session;
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}
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catch (Exception)
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{
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return null;
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}
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}
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/// <summary>
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/// Used by unit tests only.
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/// </summary>
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/// <param name="session">The session.</param>
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public void LoadCache(Session session)
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{
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this.Cache.Clear();
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if (XenObjectDownloader.LegacyEventSystem(session))
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XenObjectDownloader.RegisterForEvents(session);
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cacheIsPopulated = false;
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string token = "";
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bool legacyEventSystem = XenObjectDownloader.LegacyEventSystem(session);
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XenObjectDownloader.GetAllObjects(session, eventQueue, () => false, legacyEventSystem, ref token);
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List<ObjectChange> events = new List<ObjectChange>();
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while (eventQueue.NotEmpty)
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events.Add(eventQueue.Dequeue());
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this.Cache.UpdateFrom(this, events);
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cacheIsPopulated = true;
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}
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/// <summary>
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/// Fired just before the cache is cleared (i.e. the cache is still populated).
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/// </summary>
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public event EventHandler<EventArgs> ClearingCache;
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public event EventHandler<EventArgs> CachePopulated;
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public event EventHandler<ConnectionResultEventArgs> ConnectionResult;
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public event EventHandler<EventArgs> ConnectionStateChanged;
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public event EventHandler<EventArgs> ConnectionLost;
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public event EventHandler<EventArgs> ConnectionClosed;
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public event EventHandler<EventArgs> ConnectionReconnecting;
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public event EventHandler<EventArgs> BeforeConnectionEnd;
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public event EventHandler<ConnectionMessageChangedEventArgs> ConnectionMessageChanged;
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public event EventHandler<ConnectionMajorChangeEventArgs> BeforeMajorChange;
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public event EventHandler<ConnectionMajorChangeEventArgs> AfterMajorChange;
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/// <summary>
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/// Fired on the UI thread, once per batch of events in CacheUpdater.
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/// </summary>
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public event EventHandler<EventArgs> XenObjectsUpdated;
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public event EventHandler<EventArgs> TimeSkewUpdated;
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public bool IsConnected
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{
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get
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{
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// sneaky, but avoids a lock
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ConnectTask t = connectTask;
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return t != null && t.Connected;
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}
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}
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public bool InProgress
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{
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get { return connectTask != null; }
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}
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/// <summary>
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/// Gets the Session passed to ConnectWorkerThread and used to update the cache in XenObjectDownloader.
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/// May return null.
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/// </summary>
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public Session Session
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{
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get
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{
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ConnectTask t = connectTask;
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return t == null ? null : t.Session;
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}
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}
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/// <summary>
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/// Create a duplicate of the Session that this connection is currently using.
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/// This will use a separate TCP stream, but the same authentication credentials.
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/// </summary>
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/// <returns></returns>
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public Session DuplicateSession()
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{
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return DuplicateSession(Session.STANDARD_TIMEOUT);
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}
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public Session DuplicateSession(int timeout)
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{
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Session s = Session;
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if (s == null)
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throw new DisconnectionException();
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return SessionFactory.CreateSession(s, this, timeout);
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}
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/// <summary>
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/// For retrieving an extra session using different credentials to those stored in the connection. Used for the sudo
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/// function in actions. Does not prompt for new credentials if the authentication fails.
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/// Does not change connection's Username and Password.
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/// </summary>
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/// <param name="username"></param>
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/// <param name="password"></param>
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/// <returns></returns>
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public Session ElevatedSession(string username, string password)
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{
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return GetNewSession(Hostname, Port, username, password, true);
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}
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/// <summary>
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/// For retrieving a new session. Changes connection's Username and Password.
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/// </summary>
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/// <param name="hostname"></param>
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/// <param name="port"></param>
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/// <param name="username"></param>
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/// <param name="password"></param>
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/// <param name="isElevated"></param>
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/// <returns></returns>
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private Session NewSession(string hostname, int port, string username, string password, bool isElevated)
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{
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Password = password;
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Username = username;
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return GetNewSession(hostname, port, username, password, isElevated);
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}
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/// <summary>
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/// For retrieving a new session.
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/// </summary>
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/// <param name="hostname"></param>
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/// <param name="port"></param>
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/// <param name="username"></param>
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/// <param name="password"></param>
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/// <param name="isElevated"></param>
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/// <returns>null if the server password has changed, the user has been prompted for the new password,
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/// but the user has clicked cancel on the dialog.</returns>
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private Session GetNewSession(string hostname, int port, string username, string password, bool isElevated)
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{
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const int DELAY = 250; // unit = ms
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int attempt = 0;
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while (true)
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{
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attempt++;
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string uname = isElevated ? username : Username;
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string pwd = isElevated ? password : Password; // Keep the password that we're using for this iteration, as it may
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// be changed by another thread handling an authentication failure.
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// For elevated session we use the elevated username and password passed into this function,
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// as the connection's Username and Password are not updated.
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Session session = SessionFactory.CreateSession(this, hostname, port);
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if (isElevated)
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session.IsElevatedSession = true;
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try
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{
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session.login_with_password(uname, pwd, !string.IsNullOrEmpty(Version) ? Version : Helper.APIVersionString(API_Version.LATEST));
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return session;
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}
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catch (Failure f)
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{
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if (connectTask == null || connectTask.Cancelled) // the user has clicked cancel on the connection to server dialog
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{
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attempt = DEFAULT_MAX_SESSION_LOGIN_ATTEMPTS; // make sure we throw rather than try again
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throw new CancelledException(); // make the dialog pop up again
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}
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else if (f.ErrorDescription.Count > 0)
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{
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switch (f.ErrorDescription[0])
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{
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case Failure.SESSION_AUTHENTICATION_FAILED:
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if (isElevated)
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throw;
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if (PromptForNewPassword(pwd))
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attempt = 0;
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else
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{
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//user cannot provide correct credentials, we d/c now to save the confusion of having the server available
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//but unusable.
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EndConnect();
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OnConnectionClosed();
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throw new CancelledException();
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}
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break;
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case Failure.HOST_IS_SLAVE:
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// we know it is a slave so there there is no need to try and connect again, we need to connect to the master
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case Failure.RBAC_PERMISSION_DENIED:
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// No point retrying this, the user needs the read only role at least to log in
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case Failure.HOST_UNKNOWN_TO_MASTER:
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// Will never succeed, CA-74718
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throw;
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default:
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if (isElevated)
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{
|
|
if (attempt >= DEFAULT_MAX_SESSION_LOGIN_ATTEMPTS)
|
|
throw;
|
|
else
|
|
break;
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (attempt >= DEFAULT_MAX_SESSION_LOGIN_ATTEMPTS)
|
|
throw;
|
|
}
|
|
}
|
|
catch (WebException e)
|
|
{
|
|
if (e.Status == WebExceptionStatus.TrustFailure)
|
|
throw new CancelledException();
|
|
if (e.Status == WebExceptionStatus.NameResolutionFailure || e.Status == WebExceptionStatus.ProtocolError || attempt >= DEFAULT_MAX_SESSION_LOGIN_ATTEMPTS)
|
|
throw;
|
|
}
|
|
catch (UriFormatException)
|
|
{
|
|
// No point trying to connect more than once to a duff URI
|
|
throw;
|
|
}
|
|
catch (Exception)
|
|
{
|
|
if (attempt >= DEFAULT_MAX_SESSION_LOGIN_ATTEMPTS)
|
|
throw;
|
|
}
|
|
Thread.Sleep(DELAY);
|
|
}
|
|
}
|
|
|
|
// This CompareTo() mimics the sort order we get from XenSearch, with
|
|
// pools first, then hosts, then disconnected connections. It is used
|
|
// in some dialogs where we don't do a proper search: see CA-57131 &
|
|
// CA-60517 for examples.
|
|
public int CompareTo(IXenConnection other)
|
|
{
|
|
if (this == other)
|
|
return 0;
|
|
|
|
if (other == null)
|
|
return -1;
|
|
|
|
Pool thisPool = Helpers.GetPool(this);
|
|
Pool otherPool = Helpers.GetPool(other);
|
|
|
|
int thisClass = (this.IsConnected ?
|
|
(thisPool == null ? 2 : 1) : 3);
|
|
int otherClass = (other.IsConnected ?
|
|
(otherPool == null ? 2 : 1) : 3);
|
|
|
|
if (thisClass != otherClass)
|
|
return thisClass - otherClass;
|
|
|
|
int result = StringUtility.NaturalCompare(Name, other.Name);
|
|
if (result != 0)
|
|
return result;
|
|
|
|
Pool p1 = Helpers.GetPoolOfOne(this);
|
|
Pool p2 = Helpers.GetPoolOfOne(other);
|
|
if (p1 == null || p2 == null)
|
|
return 0; // shouldn't happen once connected, but let's be safe
|
|
|
|
return p1.opaque_ref.CompareTo(p2.opaque_ref);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Set the pool and master details in the Action to allow proper filtering in HistoryPanel.
|
|
/// </summary>
|
|
private void SetPoolAndHostInAction(ActionBase action)
|
|
{
|
|
Pool pool = Helpers.GetPoolOfOne(this);
|
|
if (pool != null)
|
|
SetPoolAndHostInAction(action, pool, PoolOpaqueRef);
|
|
}
|
|
|
|
private void SetPoolAndHostInAction(ActionBase n, Pool pool, string poolopaqueref)
|
|
{
|
|
if (pool != null && !string.IsNullOrEmpty(poolopaqueref))
|
|
{
|
|
Pool p = new Pool();
|
|
p.Connection = this;
|
|
p.opaque_ref = poolopaqueref;
|
|
p.UpdateFrom(pool);
|
|
|
|
Host h = new Host();
|
|
h.Connection = this;
|
|
h.opaque_ref = pool.master.opaque_ref;
|
|
|
|
n.Pool = p;
|
|
n.Host = h;
|
|
}
|
|
else
|
|
{
|
|
// Match the hack in XenSearch/GroupAlg.cs. We are creating fake Host objects to
|
|
// represent the disconnected server, with the opaque_ref set to the connection's HostnameWithPort.
|
|
// We need to do the same here, so that Actions for disconnected hosts (like failed connections)
|
|
// are attached to the disconnected server correctly.
|
|
Host host = new Host();
|
|
host.Connection = this;
|
|
host.opaque_ref = HostnameWithPort;
|
|
n.Host = host;
|
|
}
|
|
}
|
|
|
|
private Func<IXenConnection, string, bool> _promptForNewPassword;
|
|
/// <summary>
|
|
///
|
|
/// </summary>
|
|
/// <param name="initiateMasterSearch">If true, if connection to the master fails we will start trying to connect to
|
|
/// each remembered slave in turn.</param>
|
|
/// <param name="promptForNewPassword">A function that prompts the user for the changed password for a server.</param>
|
|
public void BeginConnect(bool initiateMasterSearch, Func<IXenConnection, string, bool> promptForNewPassword)
|
|
{
|
|
_promptForNewPassword = promptForNewPassword;
|
|
|
|
//InvokeHelper.Synchronizer is used for synchronizing the cache update. Must not be null at this point. It can be initialized through InvokeHelper.Initialize()
|
|
Trace.Assert(InvokeHelper.Synchronizer != null);
|
|
|
|
InvokeHelper.AssertOnEventThread();
|
|
|
|
if (initiateMasterSearch)
|
|
{
|
|
FindingNewMaster = true;
|
|
FindingNewMasterStartedAt = DateTime.Now;
|
|
}
|
|
MasterMayChange = false;
|
|
|
|
if (!HandlePromptForNewPassword())
|
|
return;
|
|
|
|
lock (connectTaskLock)
|
|
{
|
|
if (connectTask == null)
|
|
{
|
|
ClearEventQueue();
|
|
OnBeforeMajorChange(false);
|
|
Cache.Clear();
|
|
OnAfterMajorChange(false);
|
|
connectTask = new ConnectTask(Hostname, Port);
|
|
StopMonitor();
|
|
heartbeat = new Heartbeat(this, XenAdminConfigManager.Provider.ConnectionTimeout);
|
|
Thread t = new Thread(ConnectWorkerThread);
|
|
t.Name = "Connection to " + Hostname;
|
|
t.IsBackground = true;
|
|
t.Start(connectTask);
|
|
}
|
|
else
|
|
{
|
|
// a connection is already in progress
|
|
}
|
|
}
|
|
}
|
|
|
|
private static object WaitForMonitor = new object();
|
|
private static int WaitForEventRegistered = 0;
|
|
private static object WaitForEventRegisteredLock = new object();
|
|
public void WaitFor(Func<bool> predicate, Func<bool> cancelling)
|
|
{
|
|
lock (WaitForEventRegisteredLock)
|
|
{
|
|
if (WaitForEventRegistered == 0)
|
|
XenObjectsUpdated += WakeWaitFor;
|
|
WaitForEventRegistered++;
|
|
}
|
|
try
|
|
{
|
|
while (true)
|
|
{
|
|
lock (WaitForMonitor)
|
|
{
|
|
if (predicate() || (cancelling != null && cancelling()))
|
|
return;
|
|
System.Threading.Monitor.Wait(WaitForMonitor, 500);
|
|
}
|
|
}
|
|
}
|
|
finally
|
|
{
|
|
lock (WaitForEventRegisteredLock)
|
|
{
|
|
WaitForEventRegistered--;
|
|
if (WaitForEventRegistered == 0)
|
|
XenObjectsUpdated -= WakeWaitFor;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void WakeWaitFor(object sender, EventArgs e)
|
|
{
|
|
lock (WaitForMonitor)
|
|
{
|
|
System.Threading.Monitor.PulseAll(WaitForMonitor);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Equivalent to WaitForCache(xenref, null).
|
|
/// </summary>
|
|
/// <typeparam name="T"></typeparam>
|
|
/// <param name="xenref"></param>
|
|
/// <returns></returns>
|
|
public T WaitForCache<T>(XenRef<T> xenref) where T : XenObject<T>
|
|
{
|
|
return WaitForCache(xenref, null);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Wait for the given object to arrive in our cache. Returns the XenObject, or null if it does
|
|
/// not appear within the timeout (1 minute).
|
|
///
|
|
/// This blocks, so must only be used on a background thread.
|
|
/// </summary>
|
|
/// <param name="xenRef"></param>
|
|
/// <param name="Cancelling">A delegate to check whether to cancel. May be null, in which case it's ignored</param>
|
|
public T WaitForCache<T>(XenRef<T> xenref, Func<bool> cancelling) where T : XenObject<T>
|
|
{
|
|
lock (WaitForEventRegisteredLock)
|
|
{
|
|
if (WaitForEventRegistered == 0)
|
|
XenObjectsUpdated += WakeWaitFor;
|
|
WaitForEventRegistered++;
|
|
}
|
|
try
|
|
{
|
|
for (int i = 0; i < 120; i++)
|
|
{
|
|
lock (WaitForMonitor)
|
|
{
|
|
T result = Resolve<T>(xenref);
|
|
if (result != null || (cancelling != null && cancelling()))
|
|
return result;
|
|
System.Threading.Monitor.Wait(WaitForMonitor, 500);
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
finally
|
|
{
|
|
lock (WaitForEventRegisteredLock)
|
|
{
|
|
WaitForEventRegistered--;
|
|
if (WaitForEventRegistered == 0)
|
|
XenObjectsUpdated -= WakeWaitFor;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Equivalent to EndConnect(true).
|
|
/// i.e. Clears the cache.
|
|
/// </summary>
|
|
public void EndConnect()
|
|
{
|
|
EndConnect(true);
|
|
}
|
|
|
|
/// <param name="resetState">Whether the cache should be cleared (requires invoking onto the GUI thread)</param>
|
|
public void EndConnect(bool resetState)
|
|
{
|
|
ConnectTask t = connectTask;
|
|
connectTask = null;
|
|
EndConnect(resetState, t);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Closes the connecting dialog, stops the XenMetricsMonitor thread, marks this.task as Cancelled and
|
|
/// logs out of the task's Session on a background thread.
|
|
/// </summary>
|
|
/// <param name="clearCache">Whether the cache should be cleared (requires invoking onto the GUI thread)</param>
|
|
/// <param name="task"></param>
|
|
private void EndConnect(bool clearCache, ConnectTask task)
|
|
{
|
|
OnBeforeConnectionEnd();
|
|
|
|
lock (connectTaskLock)
|
|
{
|
|
StopMonitor();
|
|
if (task != null)
|
|
{
|
|
task.Cancelled = true;
|
|
Session session = task.Session;
|
|
task.Session = null;
|
|
if (session != null)
|
|
{
|
|
Logout(session);
|
|
}
|
|
}
|
|
}
|
|
|
|
MarkConnectActionComplete();
|
|
|
|
// Save list of addresses of current hosts in pool
|
|
List<string> members = new List<string>();
|
|
foreach (Host host in Cache.Hosts)
|
|
{
|
|
members.Add(host.address);
|
|
}
|
|
lock (PoolMembersLock)
|
|
{
|
|
PoolMembers = members;
|
|
}
|
|
|
|
// Clear the XenAPI object cache
|
|
if (clearCache)
|
|
{
|
|
ClearCache();
|
|
}
|
|
|
|
_promptForNewPassword = null;
|
|
OnConnectionStateChanged();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Try to logout the given session. This will cause any threads blocking on Event.next() to get
|
|
/// a XenAPI.Failure (which is better than them hanging around forever).
|
|
/// Do on a background thread - otherwise, if the master has died, then this will block
|
|
/// until the timeout is reached (default 20s).
|
|
/// </summary>
|
|
/// <param name="session">May be null, in which case nothing happens.</param>
|
|
public void Logout(Session session)
|
|
{
|
|
if (session == null || session.uuid == null)
|
|
return;
|
|
|
|
Thread t = new Thread(Logout_);
|
|
t.Name = string.Format("Logging out session {0}", session.uuid);
|
|
t.IsBackground = true;
|
|
t.Priority = ThreadPriority.Lowest;
|
|
t.Start(session);
|
|
}
|
|
|
|
public void Logout()
|
|
{
|
|
Logout(Session);
|
|
}
|
|
|
|
private static void Logout_(object o)
|
|
{
|
|
Session session = (Session)o;
|
|
try
|
|
{
|
|
log.Debug("Trying Session.logout() on background thread");
|
|
session.logout();
|
|
log.Debug("Session.logout() succeeded");
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
log.Debug("Session.logout() failed", e);
|
|
}
|
|
}
|
|
|
|
public void Interrupt()
|
|
{
|
|
ConnectTask t = connectTask;
|
|
ICache coll = Cache;
|
|
connectTask = null;
|
|
if (t != null && t.Connected)
|
|
{
|
|
string poolopaqueref = null;
|
|
Pool pool = coll == null ? null : getAPool(coll, out poolopaqueref);
|
|
t.Cancelled = true;
|
|
HandleConnectionLost(t, pool, poolopaqueref);
|
|
}
|
|
}
|
|
|
|
private void ClearCache()
|
|
{
|
|
OnClearingCache();
|
|
ClearEventQueue();
|
|
// This call to Clear needs to occur on the background thread, otherwise the event firing in response to all the changes
|
|
// block in one big lump rather than the smaller pieces that you get when invoking onto the event thread on a finer
|
|
// granularity. If you do all this on the event thread, then the app tends to go (Not Responding) when you lose a connection.
|
|
// It doesn't actually occur on the background thread all the time. There's a path from AddServerDialog.ConnectToServer.
|
|
Cache.Clear();
|
|
}
|
|
|
|
private void OnCachePopulated()
|
|
{
|
|
lock (connectTaskLock)
|
|
{
|
|
if (heartbeat != null)
|
|
heartbeat.Start();
|
|
}
|
|
|
|
if (CachePopulated != null)
|
|
CachePopulated(this, EventArgs.Empty);
|
|
|
|
MarkConnectActionComplete();
|
|
}
|
|
|
|
private string GetReason(Exception error)
|
|
{
|
|
if (error is CookComputing.XmlRpc.XmlRpcServerException)
|
|
{
|
|
return string.Format(Messages.SERVER_FAILURE, error.Message);
|
|
}
|
|
else if (error is ArgumentException)
|
|
{
|
|
// This happens if the server API is incompatible with our bindings. This should
|
|
// never happen in production, but will happen during development if a field
|
|
// changes type, for example.
|
|
return Messages.SERVER_API_INCOMPATIBLE;
|
|
}
|
|
else if (error is WebException)
|
|
{
|
|
WebException w = error as WebException;
|
|
if (w.Status == WebExceptionStatus.NameResolutionFailure)
|
|
{
|
|
return string.Format(Messages.CONNECT_RESOLUTION_FAILURE, this.Hostname);
|
|
}
|
|
else if (w.Status == WebExceptionStatus.ConnectFailure)
|
|
{
|
|
return string.Format(Messages.CONNCET_CONNECTION_FAILURE, this.Hostname);
|
|
}
|
|
else if (w.Status == WebExceptionStatus.ReceiveFailure)
|
|
{
|
|
return string.Format(Messages.CONNECT_NO_XAPI_FAILURE, this.Hostname);
|
|
}
|
|
else
|
|
{
|
|
return w.Message;
|
|
}
|
|
}
|
|
else if (error is Failure && error != null && !string.IsNullOrEmpty(error.Message))
|
|
{
|
|
Failure f = error as Failure;
|
|
if (f.ErrorDescription[0] == Failure.RBAC_PERMISSION_DENIED)
|
|
{
|
|
// we use a different error message here from the standard one in friendly names
|
|
return Messages.ERROR_NO_PERMISSION;
|
|
}
|
|
return error.Message;
|
|
}
|
|
else if (error is NullReferenceException && error.Source.StartsWith("CookComputing"))
|
|
{
|
|
return string.Format(Messages.CONNCET_CONNECTION_FAILURE, this.Hostname);
|
|
}
|
|
else if (error != null && !string.IsNullOrEmpty(error.Message))
|
|
{
|
|
return error.Message;
|
|
}
|
|
else
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
private void HandleSuccessfulConnection(string taskHostname, int task_port)
|
|
{
|
|
// add server name to history (if it's not already there)
|
|
XenAdminConfigManager.Provider.UpdateServerHistory(HostnameWithPort);
|
|
|
|
if (!ConnectionsManager.XenConnectionsContains(this))
|
|
{
|
|
lock (ConnectionsManager.ConnectionsLock)
|
|
{
|
|
ConnectionsManager.XenConnections.Add(this);
|
|
}
|
|
|
|
InvokeHelper.Invoke(XenAdminConfigManager.Provider.SaveSettingsIfRequired);
|
|
}
|
|
|
|
log.InfoFormat("Connected to {0} ({1}:{2})", FriendlyName, taskHostname, task_port);
|
|
string name =
|
|
string.IsNullOrEmpty(FriendlyName) || FriendlyName == taskHostname ?
|
|
taskHostname :
|
|
string.Format("{0} ({1})", FriendlyName, taskHostname);
|
|
string title = string.Format(Messages.CONNECTING_NOTICE_TITLE, name);
|
|
string msg = string.Format(Messages.CONNECTING_NOTICE_TEXT, name);
|
|
log.Info(msg);
|
|
|
|
ConnectAction = new ActionBase(title, msg, false, false);
|
|
|
|
ExpectPasswordIsCorrect = true;
|
|
OnConnectionResult(true, null, null);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Check the password isn't null, which happens when the session is restored without remembering passwords.
|
|
/// </summary>
|
|
/// <returns>Whether to continue.</returns>
|
|
private bool HandlePromptForNewPassword()
|
|
{
|
|
if (Password == null && !PromptForNewPassword(Password))
|
|
{
|
|
// if false the user has cancelled, set the password back to null and return
|
|
Password = null;
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
private void HandleConnectionTermination()
|
|
{
|
|
// clean up action so we dont stay open forever
|
|
if (ConnectAction != null)
|
|
ConnectAction.IsCompleted = true;
|
|
}
|
|
|
|
private readonly object PromptLock = new object();
|
|
/// <summary>
|
|
/// Prompts the user for the changed password for a server.
|
|
/// </summary>
|
|
/// <param name="old_password"></param>
|
|
/// <returns></returns>
|
|
private bool PromptForNewPassword(string old_password)
|
|
{
|
|
// Serialise prompting for new passwords, so that we don't get multiple dialogs pop up.
|
|
lock (PromptLock)
|
|
{
|
|
if (Password != old_password)
|
|
{
|
|
// Some other thread has changed the password already. Retry using that one.
|
|
return true;
|
|
}
|
|
|
|
bool result = (_promptForNewPassword != null) ? _promptForNewPassword(this, old_password) : false;
|
|
return result;
|
|
}
|
|
}
|
|
|
|
private void ClearEventQueue()
|
|
{
|
|
while (eventQueue.NotEmpty)
|
|
{
|
|
eventQueue.Dequeue();
|
|
}
|
|
|
|
// Suspend the cache update timer
|
|
cacheUpdateTimer.Change(Timeout.Infinite, Timeout.Infinite);
|
|
}
|
|
|
|
private void EventsPending()
|
|
{
|
|
lock (cacheUpdateTimer)
|
|
{
|
|
if (cacheUpdaterRunning)
|
|
updatesWaiting = true;
|
|
else
|
|
cacheUpdateTimer.Change(50, -1);
|
|
}
|
|
}
|
|
|
|
private void cacheUpdater(object state)
|
|
{
|
|
lock (cacheUpdateTimer)
|
|
{
|
|
if (cacheUpdaterRunning)
|
|
{
|
|
// there is a race-condition here which can be observed under high load: It is possible for the timer to fire even when
|
|
// cacheUpdaterRunning = true. The check ensures we don't get multiple threads calling cacheUpdater
|
|
// on the same connection.
|
|
updatesWaiting = true;
|
|
return;
|
|
}
|
|
|
|
cacheUpdaterRunning = true;
|
|
updatesWaiting = false;
|
|
}
|
|
|
|
try
|
|
{
|
|
cacheUpdater_();
|
|
}
|
|
finally
|
|
{
|
|
bool waiting;
|
|
lock (cacheUpdateTimer)
|
|
{
|
|
waiting = updatesWaiting;
|
|
cacheUpdaterRunning = false;
|
|
}
|
|
if (waiting)
|
|
cacheUpdater(null);
|
|
}
|
|
}
|
|
|
|
private void cacheUpdater_()
|
|
{
|
|
// Copy events off the event queue
|
|
// as we don't want events delivered while we're
|
|
// on the GUI thread to be included in this set of
|
|
// updates, otherwise we might hose the gui thread
|
|
// during an event storm (ie deleting 1000 vms)
|
|
List<ObjectChange> events = new List<ObjectChange>();
|
|
|
|
while (eventQueue.NotEmpty)
|
|
events.Add(eventQueue.Dequeue());
|
|
|
|
if (events.Count > 0)
|
|
{
|
|
InvokeHelper.Invoke(delegate()
|
|
{
|
|
try
|
|
{
|
|
OnBeforeMajorChange(false);
|
|
bool fire = Cache.UpdateFrom(this, events);
|
|
OnAfterMajorChange(false);
|
|
|
|
if (fire)
|
|
OnXenObjectsUpdated();
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
log.Error("Exception updating cache.", e);
|
|
log.Debug(e, e);
|
|
#if DEBUG
|
|
if (System.Diagnostics.Debugger.IsAttached)
|
|
throw;
|
|
#endif
|
|
}
|
|
|
|
});
|
|
|
|
if (!cacheIsPopulated)
|
|
{
|
|
cacheIsPopulated = true;
|
|
try
|
|
{
|
|
OnCachePopulated();
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
log.Error("Exception calling OnCachePopulated.", e);
|
|
log.Debug(e, e);
|
|
#if DEBUG
|
|
if (System.Diagnostics.Debugger.IsAttached)
|
|
throw;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// if not called the action will never finish and the gui will never close
|
|
/// </summary>
|
|
private void MarkConnectActionComplete()
|
|
{
|
|
if (ConnectAction != null && !ConnectAction.IsCompleted)
|
|
{
|
|
string title = string.Format(Messages.CONNECTION_OK_NOTICE_TITLE, Hostname);
|
|
string msg = string.Format(Messages.CONNECTION_OK_NOTICE_TEXT, Hostname);
|
|
log.Info(msg);
|
|
ConnectAction.Title = title;
|
|
ConnectAction.Description = msg;
|
|
SetPoolAndHostInAction(ConnectAction);
|
|
|
|
// mark the connect action as completed
|
|
ConnectAction.Finished = DateTime.Now;
|
|
ConnectAction.PercentComplete = 100;
|
|
ConnectAction.IsCompleted = true;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stops this connection's XenMetricsMonitor thread.
|
|
/// Expects to be locked under connectTaskLock.
|
|
/// </summary>
|
|
private void StopMonitor()
|
|
{
|
|
if (heartbeat != null)
|
|
{
|
|
heartbeat.Stop();
|
|
heartbeat = null;
|
|
}
|
|
}
|
|
|
|
private const int DEFAULT_MAX_SESSION_LOGIN_ATTEMPTS = 3;
|
|
|
|
private bool IsSimulatorConnection
|
|
{
|
|
get
|
|
{
|
|
return Helpers.DbProxyIsSimulatorUrl(this.Hostname);
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// The main method for a connection to a XenServer. This method runs until the connection is lost, and
|
|
/// contains a loop that after doing an initial cache fill processes events off the wire when they arrive.
|
|
/// </summary>
|
|
/// <param name="o"></param>
|
|
private void ConnectWorkerThread(object o)
|
|
{
|
|
ConnectTask task = (ConnectTask)o;
|
|
Exception error = null;
|
|
Pool pool = null;
|
|
|
|
try
|
|
{
|
|
log.DebugFormat("IXenConnection: trying to connect to {0}", HostnameWithPort);
|
|
|
|
Session session = NewSession(task.Hostname, task.Port, Username, Password, false);
|
|
// Save the session so we can log it out later
|
|
task.Session = session;
|
|
|
|
if (session.APIVersion <= API_Version.API_1_2)
|
|
throw new ServerNotSupported();
|
|
|
|
// Event.next uses a different session with a shorter timeout: see CA-33145.
|
|
// Although Orlando hosts don't: see CA-40952.
|
|
Session eventNextSession =
|
|
session.APIVersion >= API_Version.API_1_6 ? // Helpers.GeorgeOrGreater, except we can't use that because the cache isn't populated before we fire the first Event.next.
|
|
DuplicateSession(EVENT_NEXT_TIMEOUT) :
|
|
session;
|
|
|
|
bool legacyEventSystem = XenObjectDownloader.LegacyEventSystem(session);
|
|
|
|
if (legacyEventSystem)
|
|
XenObjectDownloader.RegisterForEvents(session);
|
|
|
|
cacheIsPopulated = false;
|
|
session.CacheWarming = true;
|
|
|
|
string token = "";
|
|
bool eventsExceptionLogged = false;
|
|
|
|
while (true)
|
|
{
|
|
if (task.Cancelled)
|
|
break;
|
|
|
|
EventNextBlocked = false;
|
|
|
|
if (session.CacheWarming)
|
|
{
|
|
if (!task.Connected)
|
|
{
|
|
// We've started cache sync: update the dialog text
|
|
OnConnectionMessageChanged(string.Format(Messages.LABEL_SYNC, this.Hostname));
|
|
}
|
|
|
|
XenObjectDownloader.GetAllObjects(session, eventQueue, task.GetCancelled, legacyEventSystem, ref token);
|
|
session.CacheWarming = false;
|
|
}
|
|
else
|
|
{
|
|
try
|
|
{
|
|
XenObjectDownloader.GetEvents(eventNextSession, eventQueue, task.GetCancelled, legacyEventSystem, ref token);
|
|
eventsExceptionLogged = false;
|
|
}
|
|
catch (WebException exn)
|
|
{
|
|
if (ExpectDisruption && (exn.Status == WebExceptionStatus.KeepAliveFailure || exn.Status == WebExceptionStatus.ConnectFailure))
|
|
{
|
|
if (!eventsExceptionLogged)
|
|
{
|
|
log.Debug("Ignoring keepalive/connect failure, because disruption is expected");
|
|
eventsExceptionLogged = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
throw;
|
|
}
|
|
}
|
|
}
|
|
|
|
// check if requested to cancel
|
|
if (task.Cancelled)
|
|
break;
|
|
|
|
if (!task.Connected)
|
|
{
|
|
lock (ConnectionsManager.ConnectionsLock)
|
|
{
|
|
pool = ObjectChange.GetPool(eventQueue, out PoolOpaqueRef);
|
|
Host master = ObjectChange.GetMaster(eventQueue);
|
|
|
|
MasterIPAddress = master.address;
|
|
|
|
foreach (IXenConnection iconn in ConnectionsManager.XenConnections)
|
|
{
|
|
XenConnection connection = iconn as XenConnection;
|
|
Trace.Assert(connection != null);
|
|
if (!connection.IsConnected)
|
|
continue;
|
|
|
|
bool sameRef = PoolOpaqueRef == connection.PoolOpaqueRef;
|
|
|
|
if (!sameRef)
|
|
continue;
|
|
|
|
bool sameMaster = MasterIPAddress == connection.MasterIPAddress;
|
|
|
|
if (sameRef && sameMaster)
|
|
{
|
|
throw new ConnectionExists(connection);
|
|
}
|
|
else
|
|
{
|
|
// CA-15633: XenCenter does not allow connection to host
|
|
// on which backup is restored.
|
|
|
|
throw new BadRestoreDetected(connection);
|
|
}
|
|
}
|
|
|
|
// Check if the host being connected to has a XenExpress license
|
|
foreach (Host newHost in ObjectChange.GetHosts(eventQueue))
|
|
{
|
|
if (newHost.RestrictConnection)
|
|
{
|
|
Restricted = true;
|
|
foreach (IXenConnection existingConnection in ConnectionsManager.XenConnections)
|
|
{
|
|
XenConnection connection = existingConnection as XenConnection;
|
|
Trace.Assert(connection != null);
|
|
if (connection.IsConnected && connection.IsRestricted)
|
|
throw new ExpressRestriction(newHost.Name, existingConnection.Hostname);
|
|
}
|
|
}
|
|
}
|
|
|
|
task.Connected = true;
|
|
|
|
FriendlyName =
|
|
!string.IsNullOrEmpty(pool.Name) ? pool.Name :
|
|
!string.IsNullOrEmpty(master.Name) ? master.Name :
|
|
task.Hostname;
|
|
} // ConnectionsLock
|
|
|
|
// Remove any other (disconnected) entries for this server from the tree
|
|
List<IXenConnection> existingConnections = new List<IXenConnection>();
|
|
foreach (IXenConnection connection in ConnectionsManager.XenConnections)
|
|
{
|
|
if (connection.Hostname.Equals(task.Hostname) && !connection.IsConnected)
|
|
{
|
|
existingConnections.Add(connection);
|
|
}
|
|
}
|
|
foreach (IXenConnection connection in existingConnections)
|
|
{
|
|
ConnectionsManager.ClearCacheAndRemoveConnection(connection);
|
|
}
|
|
|
|
|
|
log.DebugFormat("Getting server time for pool {0} ({1})...", FriendlyName, PoolOpaqueRef);
|
|
SetServerTimeOffset(session, pool.master.opaque_ref);
|
|
|
|
// add server name to history (if it's not already there)
|
|
XenAdminConfigManager.Provider.UpdateServerHistory(HostnameWithPort);
|
|
|
|
HandleSuccessfulConnection(task.Hostname, task.Port);
|
|
|
|
try
|
|
{
|
|
SetPoolAndHostInAction(ConnectAction, pool, PoolOpaqueRef);
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
log.Error(e, e);
|
|
}
|
|
|
|
log.DebugFormat("Completed connection phase for pool {0} ({1}).", FriendlyName, PoolOpaqueRef);
|
|
}
|
|
|
|
EventsPending();
|
|
}
|
|
}
|
|
catch (Failure e)
|
|
{
|
|
if (task.Cancelled && e.ErrorDescription.Count > 0 && e.ErrorDescription[0] == Failure.SESSION_INVALID)
|
|
{
|
|
// Do nothing: this is probably a result of the user disconnecting, and us calling session.logout()
|
|
}
|
|
else
|
|
{
|
|
error = e;
|
|
log.Warn(e);
|
|
}
|
|
}
|
|
catch (WebException e)
|
|
{
|
|
error = e;
|
|
log.Debug(e.Message);
|
|
}
|
|
catch (XmlRpcFaultException e)
|
|
{
|
|
error = e;
|
|
log.Debug(e.Message);
|
|
}
|
|
catch (XmlRpcException e)
|
|
{
|
|
error = e;
|
|
log.Debug(e.Message);
|
|
}
|
|
catch (TargetInvocationException e)
|
|
{
|
|
error = e.InnerException;
|
|
log.Error("TargetInvocationException", e);
|
|
}
|
|
catch (UriFormatException e)
|
|
{
|
|
// This can happen when the user types gobbledy-gook into the host-name field
|
|
// of the add server dialog...
|
|
error = e;
|
|
log.Debug(e.Message);
|
|
}
|
|
catch (CancelledException)
|
|
{
|
|
task.Cancelled = true;
|
|
}
|
|
catch (DisconnectionException e)
|
|
{
|
|
error = e;
|
|
log.Debug(e.Message);
|
|
}
|
|
catch (EventNextBlockedException e)
|
|
{
|
|
EventNextBlocked = true;
|
|
error = e;
|
|
log.Error(e, e);
|
|
}
|
|
catch (Exception e)
|
|
{
|
|
error = e;
|
|
log.Error(e, e);
|
|
}
|
|
finally
|
|
{
|
|
HandleConnectionResult(task, error, pool);
|
|
}
|
|
}
|
|
|
|
private void HandleConnectionResult(ConnectTask task, Exception error, Pool pool)
|
|
{
|
|
if (task != connectTask)
|
|
{
|
|
// We've been superceded by a newer ConnectTask. Exit silently without firing events.
|
|
// Can happen when user disconnects while sync is taking place, then reconnects
|
|
// (creating a new _connectTask) before the sync is complete.
|
|
}
|
|
else
|
|
{
|
|
ClearEventQueue();
|
|
|
|
connectTask = null;
|
|
HandleConnectionTermination();
|
|
|
|
if (error is ExpressRestriction)
|
|
{
|
|
EndConnect(true, task);
|
|
|
|
ExpressRestriction e = (ExpressRestriction)error;
|
|
string msg = string.Format(Messages.CONNECTION_RESTRICTED_MESSAGE, e.HostName, e.ExistingHostName);
|
|
log.Info(msg);
|
|
// Add an informational log message saying why the connection attempt failed
|
|
ActionBase action = new ActionBase(
|
|
string.Format(Messages.CONNECTION_RESTRICTED_NOTICE_TITLE, e.HostName),
|
|
msg, false, true, Messages.CONNECTION_RESTRICTED_NOTICE_TITLE);
|
|
SetPoolAndHostInAction(action, pool, PoolOpaqueRef);
|
|
|
|
OnConnectionResult(false, Messages.CONNECTION_RESTRICTED_MESSAGE, error);
|
|
}
|
|
else if (error is ServerNotSupported)
|
|
{
|
|
EndConnect(true, task);
|
|
log.Info(error.Message);
|
|
OnConnectionResult(false, "", error);
|
|
}
|
|
else if (task.Cancelled)
|
|
{
|
|
task.Connected = false;
|
|
log.InfoFormat("IXenConnection: closing connection to {0}", this.HostnameWithPort);
|
|
EndConnect(true, task);
|
|
OnConnectionClosed();
|
|
}
|
|
else if (task.Connected)
|
|
{
|
|
HandleConnectionLost(task, pool, PoolOpaqueRef);
|
|
}
|
|
else
|
|
{
|
|
// We never connected
|
|
string reason = GetReason(error);
|
|
log.WarnFormat("IXenConnection: failed to connect to {0}: {1}", this.HostnameWithPort, reason);
|
|
|
|
// Create a new log message to say the connection attempt failed
|
|
string title = string.Format(Messages.CONNECTION_FAILED_TITLE, HostnameWithPort);
|
|
ActionBase n = new ActionBase(title, reason, false, true, title);
|
|
SetPoolAndHostInAction(n, pool, PoolOpaqueRef);
|
|
|
|
Failure f = error as Failure;
|
|
// We only want to continue the master search in certain circumstances
|
|
if (FindingNewMaster && (error is WebException || (f != null && f.ErrorDescription[0] != Failure.RBAC_PERMISSION_DENIED)))
|
|
{
|
|
if (f != null)
|
|
{
|
|
if (f.ErrorDescription[0] == XenAPI.Failure.HOST_IS_SLAVE)
|
|
{
|
|
log.DebugFormat("Found a slave of {0} at {1}; redirecting to the master at {2}",
|
|
LastMasterHostname, Hostname, f.ErrorDescription[1]);
|
|
Hostname = f.ErrorDescription[1];
|
|
OnConnectionMessageChanged(string.Format(Messages.CONNECTION_REDIRECTING, LastMasterHostname, Hostname));
|
|
ReconnectMaster();
|
|
}
|
|
else if (f.ErrorDescription[0] == XenAPI.Failure.HOST_STILL_BOOTING)
|
|
{
|
|
log.DebugFormat("Found a slave of {0} at {1}, but it's still booting; trying the next pool member",
|
|
LastMasterHostname, Hostname);
|
|
MaybeStartNextSlaveTimer(reason, error);
|
|
}
|
|
else
|
|
{
|
|
log.DebugFormat("Found a slave of {0} at {1}, but got a failure; trying the next pool member",
|
|
LastMasterHostname, Hostname);
|
|
MaybeStartNextSlaveTimer(reason, error);
|
|
}
|
|
}
|
|
else if (PoolMemberRemaining())
|
|
{
|
|
log.DebugFormat("Connection to {0} failed; trying the next pool member", Hostname);
|
|
MaybeStartNextSlaveTimer(reason, error);
|
|
}
|
|
else
|
|
{
|
|
if (ExpectDisruption || DateTime.Now - FindingNewMasterStartedAt < SEARCH_NEW_MASTER_STOP_AFTER)
|
|
{
|
|
log.DebugFormat("While trying to find a connection for {0}, tried to connect to every remembered host. Will now loop back through pool members again.",
|
|
this.HostnameWithPort);
|
|
lock (PoolMembersLock)
|
|
{
|
|
PoolMemberIndex = 0;
|
|
}
|
|
MaybeStartNextSlaveTimer(reason, error);
|
|
}
|
|
else
|
|
{
|
|
log.DebugFormat("Stopping search for new master for {0}: timeout reached without success. Trying the old master one last time",
|
|
LastConnectionFullName);
|
|
FindingNewMaster = false;
|
|
Hostname = LastMasterHostname;
|
|
ReconnectMaster();
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
OnConnectionResult(false, reason, error);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
private void SetServerTimeOffset(Session session, string master_opaqueref)
|
|
{
|
|
DateTime t = Host.get_servertime(session, master_opaqueref);
|
|
ServerTimeOffset = DateTime.UtcNow - t;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Called when a connection that had been made successfully is then lost.
|
|
/// </summary>
|
|
/// <param name="task"></param>
|
|
/// <param name="pool"></param>
|
|
/// <param name="poolopaqueref"></param>
|
|
private void HandleConnectionLost(ConnectTask task, Pool pool, string poolopaqueref)
|
|
{
|
|
task.Connected = false;
|
|
log.WarnFormat("Lost connection to {0}", this.HostnameWithPort);
|
|
|
|
// Cancel all current actions to do with this connection
|
|
if (!ExpectDisruption)
|
|
{
|
|
InvokeHelper.Invoke(() => ConnectionsManager.CancelAllActions(this));
|
|
}
|
|
// Save list of addresses of current hosts in pool
|
|
List<string> members = new List<string>();
|
|
foreach (Host host in Cache.Hosts)
|
|
{
|
|
if (!string.IsNullOrEmpty(host.address))
|
|
members.Add(host.address);
|
|
}
|
|
|
|
// Save master's address so we don't try to reconnect to it first
|
|
Host master = Helpers.GetMaster(this);
|
|
// Save ha_enabled status before we clear the cache
|
|
bool ha_enabled = IsHAEnabled();
|
|
|
|
// NB line below clears the cache
|
|
EndConnect(true, task);
|
|
|
|
string description;
|
|
LastMasterHostname = Hostname;
|
|
string poolName = pool.Name;
|
|
if (string.IsNullOrEmpty(poolName))
|
|
{
|
|
LastConnectionFullName = HostnameWithPort;
|
|
}
|
|
else
|
|
{
|
|
LastConnectionFullName = string.Format("'{0}' ({1})", poolName, HostnameWithPort);
|
|
}
|
|
if (!EventNextBlocked && (MasterMayChange || ha_enabled) && members.Count > 1)
|
|
{
|
|
log.DebugFormat("Will now try to connect to another pool member");
|
|
|
|
lock (PoolMembersLock)
|
|
{
|
|
PoolMembers.Clear();
|
|
PoolMembers.AddRange(members);
|
|
PoolMemberIndex = 0;
|
|
// Don't reconnect to the master straight away, try a slave first
|
|
if (master != null && PoolMembers[0] == master.address && PoolMembers.Count > 1)
|
|
{
|
|
PoolMemberIndex = 1;
|
|
}
|
|
}
|
|
FindingNewMaster = true;
|
|
// Record the time at which we started the new master search.
|
|
FindingNewMasterStartedAt = DateTime.Now;
|
|
StartReconnectMasterTimer();
|
|
description = string.Format(Messages.CONNECTION_LOST_NOTICE_MASTER_IN_X_SECONDS, LastConnectionFullName, XenConnection.SEARCH_NEW_MASTER_TIMEOUT_MS / 1000);
|
|
log.DebugFormat("Beginning search for new master; will give up after {0} seconds", SEARCH_NEW_MASTER_STOP_AFTER.TotalSeconds);
|
|
}
|
|
else
|
|
{
|
|
log.DebugFormat("Will retry connection to {0} in {1} ms.", LastConnectionFullName, ReconnectHostTimeoutMs);
|
|
|
|
StartReconnectSingleHostTimer();
|
|
|
|
description = string.Format(Messages.CONNECTION_LOST_RECONNECT_IN_X_SECONDS, LastConnectionFullName, ReconnectHostTimeoutMs / 1000);
|
|
}
|
|
|
|
string title = string.Format(Messages.CONNECTION_LOST_NOTICE_TITLE,
|
|
LastConnectionFullName);
|
|
ActionBase n = new ActionBase(title, description, false, true, title);
|
|
SetPoolAndHostInAction(n, pool, poolopaqueref);
|
|
OnConnectionLost();
|
|
}
|
|
|
|
private bool PoolMemberRemaining()
|
|
{
|
|
lock (PoolMembersLock)
|
|
{
|
|
return PoolMemberIndex < PoolMembers.Count;
|
|
}
|
|
}
|
|
|
|
private bool IsHAEnabled()
|
|
{
|
|
Pool pool = Helpers.GetPoolOfOne(this);
|
|
return pool != null && pool.ha_enabled;
|
|
}
|
|
|
|
/// <summary>
|
|
/// When we lose connection to a non-HA host, the timeout before we try reconnecting.
|
|
/// </summary>
|
|
private const int RECONNECT_HOST_TIMEOUT_MS = 120 * 1000;
|
|
private const int RECONNECT_SHORT_TIMEOUT_MS = 5 * 1000;
|
|
private int ReconnectHostTimeoutMs
|
|
{
|
|
get
|
|
{
|
|
if (EventNextBlocked || IsSimulatorConnection)
|
|
return RECONNECT_SHORT_TIMEOUT_MS;
|
|
else
|
|
return RECONNECT_HOST_TIMEOUT_MS;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// When HA is enabled, the timeout after losing connection to the master before we start searching for a new master.
|
|
/// i.e. This should be the time it takes master failover to be sorted out on the server, plus a margin.
|
|
/// NB we already have an additional built-in delay - it takes time for us to decide that the host is not responding,
|
|
/// and kill the connection to the dead host, before starting the search.
|
|
/// </summary>
|
|
private const int SEARCH_NEW_MASTER_TIMEOUT_MS = 60 * 1000;
|
|
/// <summary>
|
|
/// When HA is enabled, and going through each of the slaves to try and find the new master, the time between failing
|
|
/// to connect to one slave and trying to connect to the next in the list.
|
|
/// </summary>
|
|
private const int SEARCH_NEXT_SLAVE_TIMEOUT_MS = 15 * 1000;
|
|
/// <summary>
|
|
/// When going through each of the remembered members of the pool looking for the new master, don't start another pass
|
|
/// through connecting to each of the hosts if we've already been looking for this long.
|
|
/// </summary>
|
|
private static readonly TimeSpan SEARCH_NEW_MASTER_STOP_AFTER = TimeSpan.FromMinutes(6);
|
|
|
|
private void StartReconnectSingleHostTimer()
|
|
{
|
|
ReconnectionTimer =
|
|
new System.Threading.Timer((TimerCallback)ReconnectSingleHostTimer, null,
|
|
ReconnectHostTimeoutMs, ReconnectHostTimeoutMs);
|
|
}
|
|
|
|
private void StartReconnectMasterTimer()
|
|
{
|
|
StartReconnectMasterTimer(SEARCH_NEW_MASTER_TIMEOUT_MS);
|
|
}
|
|
|
|
private void MaybeStartNextSlaveTimer(string reason, Exception error)
|
|
{
|
|
if (PoolMemberRemaining())
|
|
StartReconnectMasterTimer(SEARCH_NEXT_SLAVE_TIMEOUT_MS);
|
|
else
|
|
OnConnectionResult(false, reason, error);
|
|
}
|
|
|
|
private void StartReconnectMasterTimer(int timeout)
|
|
{
|
|
OnConnectionMessageChanged(string.Format(Messages.CONNECTION_WILL_RETRY_SLAVE, LastConnectionFullName.Ellipsise(25) , timeout / 1000));
|
|
ReconnectionTimer =
|
|
new System.Threading.Timer((TimerCallback)ReconnectMasterTimer, null,
|
|
timeout, Timeout.Infinite);
|
|
}
|
|
|
|
private void ReconnectSingleHostTimer(object state)
|
|
{
|
|
if (IsConnected || !ConnectionsManager.XenConnectionsContains(this))
|
|
{
|
|
log.DebugFormat("Host {0} already reconnected", Hostname);
|
|
if (ReconnectionTimer != null)
|
|
{
|
|
ReconnectionTimer.Dispose();
|
|
ReconnectionTimer = null;
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (!ExpectDisruption) // only try once unless expect disruption
|
|
{
|
|
if (ReconnectionTimer != null)
|
|
{
|
|
ReconnectionTimer.Dispose();
|
|
ReconnectionTimer = null;
|
|
}
|
|
}
|
|
|
|
log.DebugFormat("Reconnecting to server {0}...", Hostname);
|
|
if (!XenAdminConfigManager.Provider.Exiting)
|
|
{
|
|
InvokeHelper.Invoke(delegate()
|
|
{
|
|
/*ConnectionResult += new EventHandler<ConnectionResultEventArgs>(XenConnection_ConnectionResult);
|
|
CachePopulated += new EventHandler<EventArgs>(XenConnection_CachePopulated);*/
|
|
BeginConnect(false, _promptForNewPassword);
|
|
});
|
|
OnConnectionReconnecting();
|
|
}
|
|
}
|
|
|
|
/*void XenConnection_CachePopulated(object sender, EventArgs e)
|
|
{
|
|
CachePopulated -= new EventHandler<EventArgs>(XenConnection_CachePopulated);
|
|
Program.MainWindow.CommandInterface.TrySelectNewObjectInTree(this, false, true, false);
|
|
}
|
|
|
|
void XenConnection_ConnectionResult(object sender, ConnectionResultEventArgs e)
|
|
{
|
|
if (!e.Connected)
|
|
CachePopulated -= new EventHandler<EventArgs>(XenConnection_CachePopulated);
|
|
}*/
|
|
|
|
private void ReconnectMasterTimer(object state)
|
|
{
|
|
if (IsConnected || !ConnectionsManager.XenConnectionsContains(this))
|
|
{
|
|
log.DebugFormat("Master has been found for {0} at {1}", LastMasterHostname, Hostname);
|
|
return;
|
|
}
|
|
|
|
lock (PoolMembersLock)
|
|
{
|
|
if (PoolMemberIndex < PoolMembers.Count)
|
|
{
|
|
Hostname = PoolMembers[PoolMemberIndex];
|
|
PoolMemberIndex++;
|
|
}
|
|
}
|
|
|
|
OnConnectionMessageChanged(string.Format(Messages.CONNECTION_RETRYING_SLAVE, LastConnectionFullName.Ellipsise(25), Hostname));
|
|
ReconnectMaster();
|
|
}
|
|
|
|
private void ReconnectMaster()
|
|
{
|
|
// Add an informational entry to the log
|
|
ActionBase action = new ActionBase(
|
|
string.Format(Messages.CONNECTION_FINDING_MASTER_TITLE, LastConnectionFullName),
|
|
string.Format(Messages.CONNECTION_FINDING_MASTER_DESCRIPTION, LastConnectionFullName, Hostname),
|
|
false, true);
|
|
SetPoolAndHostInAction(action, null, PoolOpaqueRef);
|
|
log.DebugFormat("Looking for master for {0} on {1}...", LastConnectionFullName, Hostname);
|
|
|
|
if (!XenAdminConfigManager.Provider.Exiting)
|
|
{
|
|
InvokeHelper.Invoke(delegate()
|
|
{
|
|
/*ConnectionResult += new EventHandler<ConnectionResultEventArgs>(XenConnection_ConnectionResult);
|
|
CachePopulated += new EventHandler<EventArgs>(XenConnection_CachePopulated);*/
|
|
BeginConnect(false, _promptForNewPassword);
|
|
});
|
|
OnConnectionReconnecting();
|
|
}
|
|
}
|
|
|
|
private Pool getAPool(ICache objects, out string opaqueref)
|
|
{
|
|
foreach (Pool pool in objects.Pools)
|
|
{
|
|
opaqueref = pool.opaque_ref;
|
|
return pool;
|
|
}
|
|
System.Diagnostics.Trace.Assert(false);
|
|
opaqueref = null;
|
|
return null;
|
|
}
|
|
|
|
private void OnClearingCache()
|
|
{
|
|
if (ClearingCache != null)
|
|
ClearingCache(this, new EventArgs());
|
|
}
|
|
|
|
private void OnConnectionResult(bool connected, string reason, Exception error)
|
|
{
|
|
if (ConnectionResult != null)
|
|
ConnectionResult(this, new ConnectionResultEventArgs(connected, reason, error));
|
|
OnConnectionStateChanged();
|
|
}
|
|
|
|
private void OnConnectionClosed()
|
|
{
|
|
if (ConnectionClosed != null)
|
|
ConnectionClosed(this, null);
|
|
OnConnectionStateChanged();
|
|
}
|
|
|
|
private void OnConnectionLost()
|
|
{
|
|
if (ConnectionLost != null)
|
|
ConnectionLost(this, null);
|
|
OnConnectionStateChanged();
|
|
}
|
|
|
|
private void OnConnectionReconnecting()
|
|
{
|
|
if (ConnectionReconnecting != null)
|
|
ConnectionReconnecting(this, null);
|
|
OnConnectionStateChanged();
|
|
}
|
|
|
|
private void OnBeforeConnectionEnd()
|
|
{
|
|
if (BeforeConnectionEnd != null)
|
|
BeforeConnectionEnd(this, null);
|
|
}
|
|
|
|
private void OnConnectionStateChanged()
|
|
{
|
|
if (ConnectionStateChanged != null)
|
|
ConnectionStateChanged(this, null);
|
|
}
|
|
|
|
private void OnConnectionMessageChanged(string message)
|
|
{
|
|
if (ConnectionMessageChanged != null)
|
|
ConnectionMessageChanged(this, new ConnectionMessageChangedEventArgs(message));
|
|
}
|
|
|
|
public void OnBeforeMajorChange(bool background)
|
|
{
|
|
if (BeforeMajorChange != null)
|
|
BeforeMajorChange(this, new ConnectionMajorChangeEventArgs(background));
|
|
}
|
|
|
|
public void OnAfterMajorChange(bool background)
|
|
{
|
|
if (AfterMajorChange != null)
|
|
AfterMajorChange(this, new ConnectionMajorChangeEventArgs(background));
|
|
}
|
|
|
|
private void OnXenObjectsUpdated()
|
|
{
|
|
// Using BeginInvoke here means that the XenObjectsUpdated event gets fired after any
|
|
// CollectionChanged events fired by ChangeableDictionary during Cache.UpdateFrom.
|
|
InvokeHelper.BeginInvoke(delegate()
|
|
{
|
|
if (XenObjectsUpdated != null)
|
|
XenObjectsUpdated(this, null);
|
|
});
|
|
}
|
|
|
|
/// <summary>
|
|
/// Stub to Cache.Resolve
|
|
/// </summary>
|
|
/// <typeparam name="T"></typeparam>
|
|
/// <param name="xenRef">May be null, in which case null is returned.</param>
|
|
/// <returns></returns>
|
|
public virtual T Resolve<T>(XenRef<T> xenRef) where T : XenObject<T>
|
|
{
|
|
return Cache.Resolve(xenRef);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Resolve every object in the given list. Skip any references that don't resolve.
|
|
/// </summary>
|
|
/// <typeparam name="T"></typeparam>
|
|
/// <param name="xenRefs">May be null, in which case the empty list is returned.</param>
|
|
/// <returns></returns>
|
|
public List<T> ResolveAll<T>(IEnumerable<XenRef<T>> xenRefs) where T : XenObject<T>
|
|
{
|
|
List<T> result = new List<T>();
|
|
if (xenRefs != null)
|
|
{
|
|
foreach (XenRef<T> xenRef in xenRefs)
|
|
{
|
|
T o = Resolve(xenRef);
|
|
if (o != null)
|
|
result.Add(o);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
public List<VDI> ResolveAllShownXenModelObjects(List<XenRef<VDI>> xenRefs, bool showHiddenObjects)
|
|
{
|
|
List<VDI> result = ResolveAll(xenRefs);
|
|
result.RemoveAll(delegate(VDI vdi)
|
|
{
|
|
return !vdi.Show(showHiddenObjects);
|
|
});
|
|
return result;
|
|
}
|
|
|
|
public static T FindByUUIDXenObject<T>(string uuid) where T : XenObject<T>
|
|
{
|
|
foreach (IXenConnection c in ConnectionsManager.XenConnectionsCopy)
|
|
{
|
|
T o = c.Cache.Find_By_Uuid<T>(uuid);
|
|
if (o != null)
|
|
return o;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Find a XenObject corresponding to the given XenRef, or null if no such object is found.
|
|
/// </summary>
|
|
public static T FindByRef<T>(XenRef<T> needle) where T : XenObject<T>
|
|
{
|
|
foreach (IXenConnection c in ConnectionsManager.XenConnectionsCopy)
|
|
{
|
|
T o = c.Resolve<T>(needle);
|
|
if (o != null)
|
|
return o;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public static string ConnectedElsewhere(string hostname)
|
|
{
|
|
lock (ConnectionsManager.ConnectionsLock)
|
|
{
|
|
foreach (IXenConnection connection in ConnectionsManager.XenConnections)
|
|
{
|
|
Pool pool = Helpers.GetPoolOfOne(connection);
|
|
if (pool == null)
|
|
continue;
|
|
|
|
Host master = connection.Resolve(pool.master);
|
|
if (master == null)
|
|
continue;
|
|
|
|
if (master.address == hostname)
|
|
{
|
|
// we have tried to connect to a slave that is a member of a pool we are already connected to.
|
|
return pool.Name;
|
|
}
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
#region IXmlSerializable Members
|
|
|
|
public System.Xml.Schema.XmlSchema GetSchema()
|
|
{
|
|
return null;
|
|
}
|
|
|
|
public void ReadXml(System.Xml.XmlReader reader)
|
|
{
|
|
Hostname = reader["Hostname"];
|
|
}
|
|
|
|
public void WriteXml(System.Xml.XmlWriter writer)
|
|
{
|
|
writer.WriteElementString("Hostname",Hostname);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region IDisposable Members
|
|
|
|
/// <summary>
|
|
/// Disposing this class will make it unusable - make sure you want to do this
|
|
/// </summary>
|
|
public void Dispose()
|
|
{
|
|
Dispose(true);
|
|
GC.SuppressFinalize(this);
|
|
}
|
|
|
|
private bool disposed;
|
|
protected virtual void Dispose(bool disposing)
|
|
{
|
|
if(!disposed)
|
|
{
|
|
if (disposing)
|
|
{
|
|
ClearingCache = null;
|
|
CachePopulated = null;
|
|
ConnectionResult = null;
|
|
ConnectionStateChanged = null;
|
|
ConnectionLost = null;
|
|
ConnectionClosed = null;
|
|
ConnectionReconnecting = null;
|
|
BeforeConnectionEnd = null;
|
|
ConnectionMessageChanged = null;
|
|
BeforeMajorChange = null;
|
|
AfterMajorChange = null;
|
|
XenObjectsUpdated = null;
|
|
TimeSkewUpdated = null;
|
|
if (ReconnectionTimer != null)
|
|
ReconnectionTimer.Dispose();
|
|
if (cacheUpdateTimer != null)
|
|
cacheUpdateTimer.Dispose();
|
|
}
|
|
disposed = true;
|
|
}
|
|
}
|
|
|
|
|
|
#endregion
|
|
}
|
|
|
|
|
|
public class ExpressRestriction : DisconnectionException
|
|
{
|
|
public readonly string HostName;
|
|
public readonly string ExistingHostName;
|
|
|
|
public ExpressRestriction(string HostName, string ExistingHostName)
|
|
{
|
|
this.HostName = HostName;
|
|
this.ExistingHostName = ExistingHostName;
|
|
}
|
|
|
|
public override string Message
|
|
{
|
|
get
|
|
{
|
|
return string.Format(Messages.LICENSE_RESTRICTION_MESSAGE, HostName, ExistingHostName);
|
|
}
|
|
}
|
|
}
|
|
|
|
public class ServerNotSupported : DisconnectionException
|
|
{
|
|
public override string Message
|
|
{
|
|
get
|
|
{
|
|
return Messages.MIAMI_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
}
|
|
|
|
public class ConnectionExists : DisconnectionException
|
|
{
|
|
public IXenConnection connection;
|
|
|
|
public ConnectionExists(IXenConnection connection)
|
|
{
|
|
this.connection = connection;
|
|
}
|
|
|
|
public override string Message
|
|
{
|
|
get
|
|
{
|
|
if (connection != null)
|
|
return string.Format(Messages.CONNECTION_EXISTS, connection.Hostname);
|
|
else
|
|
return Messages.CONNECTION_EXISTS_NULL;
|
|
}
|
|
}
|
|
|
|
public virtual string GetDialogMessage(IXenConnection _this)
|
|
{
|
|
Pool p = Helpers.GetPool(connection);
|
|
if (p == null)
|
|
return String.Format(Messages.ALREADY_CONNECTED, _this.Hostname);
|
|
|
|
return String.Format(Messages.SLAVE_ALREADY_CONNECTED,
|
|
_this.Hostname, p.Name);
|
|
}
|
|
}
|
|
|
|
class BadRestoreDetected : ConnectionExists
|
|
{
|
|
public BadRestoreDetected(IXenConnection xc)
|
|
: base(xc)
|
|
{
|
|
}
|
|
|
|
public override string Message
|
|
{
|
|
get
|
|
{
|
|
return String.Format(Messages.BAD_RESTORE_DETECTED, connection.Name);
|
|
}
|
|
}
|
|
|
|
public override string GetDialogMessage(IXenConnection _this)
|
|
{
|
|
return Message;
|
|
}
|
|
}
|
|
}
|