mirror of
https://github.com/xcp-ng/xenadmin.git
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359 lines
14 KiB
C#
359 lines
14 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.Linq;
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using System.Windows.Forms;
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using XenAdmin.Controls;
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using XenAPI;
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using XenAdmin.Core;
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using XenAdmin.Actions;
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using XenAdmin.Network;
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namespace XenAdmin.Commands
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{
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/// <summary>
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/// This is the base ToolStripMenuItem for StartVMOnHostToolStripMenuItem, ResumeVMOnHostToolStripMenuItem and MigrateVMToolStripMenuItem.
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/// </summary>
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internal abstract class VMOperationToolStripMenuItem : CommandToolStripMenuItem
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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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private readonly vm_operations _operation;
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private readonly bool _resumeAfter;
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protected VMOperationToolStripMenuItem(Command command, bool inContextMenu, vm_operations operation)
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: base(command, inContextMenu)
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{
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if (operation != vm_operations.start_on && operation != vm_operations.resume_on && operation != vm_operations.pool_migrate)
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{
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throw new ArgumentException("Invalid operation", "operation");
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}
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if (operation.Equals(vm_operations.resume_on))
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_resumeAfter = true;
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_operation = operation;
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base.DropDownItems.Add(new ToolStripMenuItem());
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}
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protected override void OnDropDownClosed(EventArgs e)
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{
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base.OnDropDownClosed(e);
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Stop();
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}
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protected override void OnDropDownOpening(EventArgs e)
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{
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base.DropDownItems.Clear();
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// Work around bug in tool kit where disabled menu items show their dropdown menus
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if (!Enabled)
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{
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ToolStripMenuItem emptyMenuItem = new ToolStripMenuItem(Messages.HOST_MENU_EMPTY);
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emptyMenuItem.Font = Program.DefaultFont;
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emptyMenuItem.Enabled = false;
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base.DropDownItems.Add(emptyMenuItem);
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return;
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}
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VisualMenuItemAlignData.ParentStrip = this;
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var selection = Command.GetSelection();
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IXenConnection connection = selection[0].Connection;
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bool wlb = Helpers.WlbEnabled(connection);
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if (wlb)
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{
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base.DropDownItems.Add(new VMOperationToolStripMenuSubItem(Messages.WLB_OPT_MENU_OPTIMAL_SERVER, Images.StaticImages._000_ServerWlb_h32bit_16));
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}
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else
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{
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base.DropDownItems.Add(new VMOperationToolStripMenuSubItem(Messages.HOME_SERVER_MENU_ITEM, Images.StaticImages._000_ServerHome_h32bit_16));
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}
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List<Host> hosts = new List<Host>(connection.Cache.Hosts);
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hosts.Sort();
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foreach (Host host in hosts)
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{
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VMOperationToolStripMenuSubItem item = new VMOperationToolStripMenuSubItem(String.Format(Messages.MAINWINDOW_CONTEXT_UPDATING, host.name_label.EscapeAmpersands()), Images.StaticImages._000_ServerDisconnected_h32bit_16);
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item.Tag = host;
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base.DropDownItems.Add(item);
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}
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// Adds the migrate wizard button, do this before the enable checks on the other items
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AddAdditionalMenuItems(selection);
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UpdateHostList();
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}
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/// <summary>
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/// Hook to add additional members to the menu item
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/// Note: Called on main window thread by executing code
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/// </summary>
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protected virtual void AddAdditionalMenuItems(SelectedItemCollection selection) { return; }
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#region UpdateHostList
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private ProduceConsumerQueue workerQueueWithoutWlb;
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readonly object locker = new object();
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private bool stopped;
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private bool Stopped
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{
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set
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{
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lock (locker)
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{
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stopped = value;
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}
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}
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get
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{
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lock (locker)
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{
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return stopped;
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}
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}
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}
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private void Stop()
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{
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Stopped = true;
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if (workerQueueWithoutWlb != null)
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workerQueueWithoutWlb.CancelWorkers(false);
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}
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private void UpdateHostList()
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{
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Stopped = false;
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var selection = Command.GetSelection();
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var connection = selection[0].Connection;
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if (Helpers.WlbEnabled(connection))
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{
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var vms = selection.AsXenObjects<VM>();
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var retrieveVmRecommendationsAction = new WlbRetrieveVmRecommendationsAction(connection, vms);
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retrieveVmRecommendationsAction.Completed += delegate
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{
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if (Stopped || retrieveVmRecommendationsAction.Cancelled ||
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!retrieveVmRecommendationsAction.Succeeded)
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return;
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var recommendations = new WlbRecommendations(vms, retrieveVmRecommendationsAction.Recommendations);
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Program.Invoke(Program.MainWindow, delegate
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{
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if (recommendations.IsError)
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EnableAppropriateHostsNoWlb();
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else
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EnableAppropriateHostsWlb(recommendations);
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});
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};
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retrieveVmRecommendationsAction.RunAsync();
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}
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else
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{
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EnableAppropriateHostsNoWlb();
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}
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}
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private void EnableAppropriateHostsWlb(WlbRecommendations recommendations)
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{
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if (Stopped || DropDownItems.Count == 0)
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return;
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// set the first menu item to be the WLB optimal server menu item
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var firstItem = DropDownItems[0] as VMOperationToolStripMenuSubItem;
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if (firstItem == null)
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return;
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var selection = Command.GetSelection();
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var firstItemCmd = new VMOperationWlbOptimalServerCommand(Command.MainWindowCommandInterface,
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selection, _operation, recommendations);
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firstItem.Command = firstItemCmd;
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firstItem.Enabled = firstItemCmd.CanExecute();
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var hostMenuItems = new List<VMOperationToolStripMenuSubItem>();
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foreach (var item in DropDownItems)
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{
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var hostMenuItem = item as VMOperationToolStripMenuSubItem;
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if (hostMenuItem == null)
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continue;
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var host = hostMenuItem.Tag as Host;
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if (host != null)
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{
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var cmd = new VMOperationWlbHostCommand(Command.MainWindowCommandInterface, selection, host,
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_operation, recommendations.GetStarRating(host));
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hostMenuItem.Command = cmd;
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hostMenuItem.Enabled = cmd.CanExecute();
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hostMenuItems.Add(hostMenuItem);
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}
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}
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// sort the hostMenuItems by star rating
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hostMenuItems.Sort(new WlbHostStarCompare());
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// refresh the drop-down-items from the menuItems.
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foreach (VMOperationToolStripMenuSubItem menuItem in hostMenuItems)
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{
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DropDownItems.Insert(hostMenuItems.IndexOf(menuItem) + 1, menuItem);
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}
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}
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private void EnableAppropriateHostsNoWlb()
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{
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if (Stopped || DropDownItems.Count == 0)
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return;
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var firstItem = DropDownItems[0] as VMOperationToolStripMenuSubItem;
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if (firstItem == null)
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return;
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// API calls could happen in CanExecute(), which take time to wait. So a Producer-Consumer-Queue with size 25 is used here to :
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// 1. Make API calls for different menu items happen in parallel;
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// 2. Limit the count of concurrent threads (now it's 25).
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workerQueueWithoutWlb = new ProduceConsumerQueue(25);
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var selection = Command.GetSelection();
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var connection = selection[0].Connection;
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var session = connection.DuplicateSession();
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var affinityHost = connection.Resolve(((VM) selection[0].XenObject).affinity);
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EnqueueHostMenuItem(this, session, affinityHost, firstItem, true);
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var hostMenuItems = DropDownItems.OfType<VMOperationToolStripMenuSubItem>().ToList();
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if (Stopped)
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return;
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foreach (VMOperationToolStripMenuSubItem item in hostMenuItems)
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{
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var host = item.Tag as Host;
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if (host != null)
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{
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var tempItem = item;
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EnqueueHostMenuItem(this, session, host, tempItem, false);
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}
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}
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}
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private void EnqueueHostMenuItem(VMOperationToolStripMenuItem menu, Session session, Host host, VMOperationToolStripMenuSubItem hostMenuItem, bool isHomeServer)
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{
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workerQueueWithoutWlb.EnqueueItem(() =>
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{
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var selection = menu.Command.GetSelection();
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var cmd = isHomeServer
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? new VMOperationHomeServerCommand(menu.Command.MainWindowCommandInterface, selection, menu._operation, session)
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: new VMOperationHostCommand(menu.Command.MainWindowCommandInterface, selection, delegate { return host; }, host.Name().EscapeAmpersands(), menu._operation, session);
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var oldMigrateCmdCanRun = cmd.CanExecute();
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if (Stopped)
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return;
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if (host == null || menu._operation == vm_operations.start_on || oldMigrateCmdCanRun)
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{
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Program.Invoke(Program.MainWindow, delegate
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{
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hostMenuItem.Command = cmd;
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hostMenuItem.Enabled = oldMigrateCmdCanRun;
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});
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}
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else
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{
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var cpmCmd = isHomeServer
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? new CrossPoolMigrateToHomeCommand(menu.Command.MainWindowCommandInterface, selection, host)
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: new CrossPoolMigrateCommand(menu.Command.MainWindowCommandInterface, selection, host, menu._resumeAfter);
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var crossPoolMigrateCmdCanRun = cpmCmd.CanExecute();
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if (Stopped)
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return;
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Program.Invoke(Program.MainWindow, delegate
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{
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if (crossPoolMigrateCmdCanRun || !string.IsNullOrEmpty(cpmCmd.CantExecuteReason))
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{
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hostMenuItem.Command = cpmCmd;
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hostMenuItem.Enabled = crossPoolMigrateCmdCanRun;
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}
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else
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{
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hostMenuItem.Command = cmd;
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hostMenuItem.Enabled = false;
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}
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});
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}
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});
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}
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#endregion
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/// <summary>
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/// This class is an implementation of the 'IComparer' interface
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/// for sorting vm placement menuItem List when wlb is enabled
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/// </summary>
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private class WlbHostStarCompare : IComparer<VMOperationToolStripMenuSubItem>
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{
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public int Compare(VMOperationToolStripMenuSubItem x, VMOperationToolStripMenuSubItem y)
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{
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int result = 0;
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// if x and y are enabled, compare their start rating
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if (x.Enabled && y.Enabled)
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result = y.StarRating.CompareTo(x.StarRating);
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// if x and y are disabled, they are equal
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else if (!x.Enabled && !y.Enabled)
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result = 0;
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// if x is disabled, y is greater
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else if (!x.Enabled)
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result = 1;
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// if y is disabled, x is greater
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else if (!y.Enabled)
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result = -1;
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return result;
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}
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}
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}
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}
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