mirror of
https://github.com/xcp-ng/xenadmin.git
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669 lines
25 KiB
C#
669 lines
25 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;
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using System.Collections.Generic;
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using System.Reflection;
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using System.Xml;
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using XenAPI;
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using XenAdmin.Network;
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using XenAdmin.ServerDBs.FakeAPI;
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using XenAdmin.Core;
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namespace XenAdmin.ServerDBs
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{
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public class DbProxy : IInvocationHandler
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{
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private static readonly ClassGenerator generator = new ClassGenerator(typeof(Proxy));
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private static readonly Type proxyType = generator.Generate();
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public static readonly Proxy_Event dummyEvent = new Proxy_Event();
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public static readonly Dictionary<IXenConnection, DbProxy> proxys = new Dictionary<IXenConnection, DbProxy>();
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private static readonly object dicLock = new object();
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public readonly Db db;
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public readonly List<Proxy_Event> eventsList = new List<Proxy_Event>();
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private readonly string url;
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public readonly IXenConnection connection;
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public volatile bool MarkToDisconnect;
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/// Set this delegate to run inside the event loop.
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/// Throwing an specific exception type or Failure will simulate the termination
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/// of the event loop mid-loop
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public Action RunInEventLoop { get; private set; }
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private static readonly Dictionary<string, List<string>> callVersions = new Dictionary<string, List<string>>();
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public bool IsSuperUser { get; private set; }
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public void SetIsSuperUser(bool isSuperUser)
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{
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IsSuperUser = isSuperUser;
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}
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public static void RemoveAll()
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{
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lock (dicLock)
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{
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foreach (KeyValuePair<IXenConnection, DbProxy> kvp in proxys)
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{
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kvp.Value.db.Dispose();
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kvp.Value.RunInEventLoop = delegate()
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{
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throw new Failure(Failure.SESSION_INVALID);
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};
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}
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proxys.Clear();
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}
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}
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/// <summary>
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/// Initializes the <see cref="DbProxy"/> class.
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/// </summary>
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static DbProxy()
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{
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dummyEvent.class_ = "vtpm"; // This will cause XenCenter to ignore the event;
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// load the api-version.xml file to detect whether a call is made for the wrong version of the server being simulated.
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/*XmlDocument doc = new XmlDocument();
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doc.Load(Assembly.GetExecutingAssembly().GetManifestResourceStream("XenAdmin.TestResources.api-version.xml"));
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foreach (XmlNode node in doc.SelectNodes("ApiVersionTool/version"))
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{
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string ver = node.Attributes["name"].Value;
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callVersions.Add(ver, new List<string>());
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foreach (XmlNode n in node.SelectNodes("call"))
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{
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callVersions[ver].Add(n.Attributes["name"].Value);
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}
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}
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*/
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}
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/// <summary>
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/// Generates a Proxy instance which implements <see cref="Proxy"/> for the specified <see cref="IXenConnection"/> and XML document.
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/// </summary>
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/// <param name="connection">The connection.</param>
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/// <param name="fileName">Name of the file.</param>
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/// <returns></returns>
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public static Proxy GetProxy(IXenConnection connection, string fileName)
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{
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return (Proxy)generator.CreateProxyInstance(proxyType, ProxyInstance(connection, fileName));
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}
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private static IInvocationHandler ProxyInstance(IXenConnection connection, string fileName)
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{
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lock (dicLock)
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{
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if (!proxys.ContainsKey(connection))
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{
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proxys[connection] = new DbProxy(connection, fileName);
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}
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return proxys[connection];
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}
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}
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/// <summary>
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/// Initializes a new instance of the <see cref="DbProxy"/> class.
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/// </summary>
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/// <param name="connection">The connection.</param>
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/// <param name="url">The http url of filename to the XenServer status report XML document to be used.</param>
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public DbProxy(IXenConnection connection, string url)
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{
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Util.ThrowIfParameterNull(connection, "connection");
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Util.ThrowIfStringParameterNullOrEmpty(url, "url");
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this.url = url;
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this.connection = connection;
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db = new Db(connection, url);
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}
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#region IInvocationHandler Members
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public object ExecuteMethod(ProxyMethodInfo pmi, object[] args)
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{
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object obj;
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if (pmi.FakeType == typeof(fakeUnknown))
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{
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obj = new fakeUnknown(pmi.TypeName, this);
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}
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else
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{
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obj = Activator.CreateInstance(pmi.FakeType, this);
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}
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object[] methodArgs = new object[pmi.FakeMethod.GetParameters().Length];
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for (int i = 0; i < methodArgs.Length; i++)
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{
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methodArgs[i] = args[i];
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}
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switch (pmi.FakeMethodType)
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{
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case MethodType.Sync:
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return pmi.FakeMethod.Invoke(obj, methodArgs);
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case MethodType.Async:
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Response<string> response = (Response<string>)pmi.FakeMethod.Invoke(obj, methodArgs);
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if (response.Status == ResponseTypes.SUCCESS)
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{
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return new Response<string>(CreateTask(DbProxy.TaskStatus.success, response.Value));
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}
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else
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{
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return new Response<string>(CreateTask(DbProxy.TaskStatus.failure, response.ErrorDescription));
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}
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}
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return new Response<String>(true, new String[] { Failure.INTERNAL_ERROR });
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}
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public event EventHandler<DbProxyInvokingEventArgs> Invoking;
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protected virtual void OnInvoking(DbProxyInvokingEventArgs e)
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{
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var handler = Invoking;
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if (handler != null)
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{
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handler(this, e);
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}
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}
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public object Invoke(string proxyMethodName, string returnType, params object[] args)
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{
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VerifyVersion(proxyMethodName);
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ProxyMethodInfo pmi = ProxyMethodNameParser.Parse(proxyMethodName);
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OnInvoking(new DbProxyInvokingEventArgs(pmi));
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if (pmi.FakeType != null)
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{
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return ExecuteMethod(pmi, args);
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}
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if (pmi.MethodName.StartsWith("set_"))
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{
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string fieldname = pmi.MethodName.Substring(4);
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// Special case: set_memory_limits is not just editing a "memory_limits" field
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if (fieldname == "memory_limits")
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{
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EditObject(pmi.TypeName, (string)args[1], "memory_static_min", args[2]);
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EditObject(pmi.TypeName, (string)args[1], "memory_static_max", args[3]);
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EditObject(pmi.TypeName, (string)args[1], "memory_dynamic_min", args[4]);
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EditObject(pmi.TypeName, (string)args[1], "memory_dynamic_max", args[5]);
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}
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else
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{
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EditObject(pmi.TypeName, (string)args[1], fieldname, args[2]);
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}
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return new Response<string>("");
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}
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switch (pmi.MethodName)
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{
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case "Url":
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return url;// "http://XenCenter.Simulator/";
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case "get_record":
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{
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string uuid = (string)args[1];
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if (uuid.StartsWith("task")) // tasks are kept track of separately
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{
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return new Response<Proxy_Task>(task_get_record(uuid));
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}
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return get_record(pmi.TypeName, uuid, true);
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}
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case "destroy":
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{
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string uuid = (string)args[1];
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if (uuid.StartsWith("task"))
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{
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task_destroy(uuid);
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return new Response<string>("");
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}
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break;
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}
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case "add_to_other_config":
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{
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string uuid = (string)args[1];
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if (!uuid.StartsWith("task")) // ignore other_config for tasks (used to keep track of meddling actions)
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{
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AddToDictionary(pmi.TypeName, (string)args[1], "other_config", args[2], args[3]);
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}
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return new Response<string>("");
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}
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case "remove_from_other_config":
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RemoveFromDictionary(pmi.TypeName, (string)args[1], "other_config", args[2]);
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return new Response<string>("");
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case "add_to_gui_config":
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AddToDictionary(pmi.TypeName, (string)args[1], "gui_config", args[2], args[3]);
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return new Response<string>("");
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case "remove_from_gui_config":
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RemoveFromDictionary(pmi.TypeName, (string)args[1], "gui_config", args[2]);
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return new Response<string>("");
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case "add_tags":
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AddToArray(pmi.TypeName, (string)args[1], "tags", args[2]);
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return new Response<string>("");
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case "remove_tags":
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RemoveFromArray(pmi.TypeName, (string)args[1], "tags", args[2]);
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return new Response<string>("");
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case "get_subject_information_from_identifier":
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Hashtable subjectInfo = new Hashtable();
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if ((string)args[1] == "SID1")
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{
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subjectInfo["subject-name"] = @"citrix\tu_one";
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subjectInfo["subject-displayname"] = "Test User 1";
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subjectInfo["subject-is-group"] = "false";
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}
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else if ((string)args[1] == "SID2")
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{
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subjectInfo["subject-name"] = @"citrix\tu_two";
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subjectInfo["subject-displayname"] = "Test User 2";
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subjectInfo["subject-is-group"] = "false";
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}
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else if ((string)args[1] == "SID3")
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{
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subjectInfo["subject-name"] = @"citrix\tg";
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subjectInfo["subject-displayname"] = "Test Group";
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subjectInfo["subject-is-group"] = "true";
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}
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return new Response<Object>(subjectInfo);
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// For VBDEditPage.CalculateDevicePositions()
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case "get_allowed_vbd_devices":
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return new Response<String[]>(new String[] { "0", "1", "2", "3", "4", "5", "6", "7" });
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case "retrieve_wlb_recommendations":
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case "retrieve_wlb_evacuate_recommendations":
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case "retrieve_wlb_configuration":
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Hashtable tbl = new Hashtable();
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return new Response<object>(tbl);
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case "get_uncooperative_resident_vms":
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return new Response<string[]>(new string[0]);
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// For HAWizard_Pages.AssignPriorities
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case "ha_compute_hypothetical_max_host_failures_to_tolerate":
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return new Response<string>("1");
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case "get_ha_host_failures_to_tolerate":
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return new Response<string>("1");
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// For EvacuateHostDialog and RollingUpgradeWizard
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case "get_vms_which_prevent_evacuation":
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return new Response<object>(new Hashtable());
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// For RollingUpgradeWizard
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case "get_live":
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return new Response<bool>(true);
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case "get_allowed_operations":
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return new Response<string[]>(new string[0]);
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}
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return new Response<String>(true, new String[] { Failure.INTERNAL_ERROR });
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}
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#endregion
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// Code to create fake asynchronous tasks that just return a known value
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private static Dictionary<string, Proxy_Task> tasks = new Dictionary<string, Proxy_Task>();
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private readonly Random rand = new Random();
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public enum TaskStatus { success, failure, pending }
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// If success, use the next argument as the result;
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// if !success, use all the subsequent arguments as the error_info.
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public string CreateTask(TaskStatus status, params string[] result)
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{
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Proxy_Task task = new Proxy_Task();
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task.uuid = String.Format("task{0}", rand.Next());
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task.name_label = task.uuid;
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task.name_description = "";
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task.created = DateTime.Now;
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task.status = status.ToString();
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if (status != TaskStatus.pending)
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{
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task.finished = DateTime.Now;
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task.progress = 100.0;
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if (status == TaskStatus.success)
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{
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task.result = result[0];
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}
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else
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{
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task.error_info = result;
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}
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}
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tasks.Add(task.uuid, task);
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return task.uuid;
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}
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public Proxy_Task GetTask(string opaque_ref)
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{
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return tasks[opaque_ref];
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}
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private static Proxy_Task task_get_record(string uuid)
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{
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Proxy_Task task;
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if (tasks.TryGetValue(uuid, out task))
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{
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return task;
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}
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return null;
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}
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private static bool task_destroy(string uuid)
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{
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return tasks.Remove(uuid);
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}
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public enum EditTypes { Replace, AddToDict, RemoveFromDict, AddToArray, RemoveFromArray }
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public void EditObject_(EditTypes editType, string typeName, string opaqueRef, string field, params object[] args)
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{
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// Edit the XML to have the new value
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edit_record(editType, typeName, opaqueRef, field, args);
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// Make a Proxy object from the new XML
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Type proxyT = TypeCache.GetProxyType(typeName);
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object proxy = get_record(typeName, opaqueRef, false);
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// Make a Proxy_Event representing this edit, and add it to the events queue
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eventsList.Add(MakeProxyEvent(typeName, opaqueRef, "mod", proxyT, proxy));
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}
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private void EditObject(string typeName, string opaqueRef, string field, object new_value)
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{
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EditObject_(EditTypes.Replace, typeName, opaqueRef, field, new_value);
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}
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private void AddToDictionary(string typeName, string opaqueRef, string field, object key, object new_value)
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{
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EditObject_(EditTypes.AddToDict, typeName, opaqueRef, field, key, new_value);
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}
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private void RemoveFromDictionary(string typeName, string opaqueRef, string field, object key)
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{
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EditObject_(EditTypes.RemoveFromDict, typeName, opaqueRef, field, key);
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}
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private void AddToArray(string typeName, string opaqueRef, string field, object value)
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{
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EditObject_(EditTypes.AddToArray, typeName, opaqueRef, field, value);
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}
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private void RemoveFromArray(string typeName, string opaqueRef, string field, object value)
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{
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EditObject_(EditTypes.RemoveFromArray, typeName, opaqueRef, field, value);
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}
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public static Proxy_Event MakeProxyEvent(string typeName, string opaqueRef, string operation, Type ProxyT, object proxy)
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{
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Proxy_Event ev = new Proxy_Event();
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ev.class_ = typeName;
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ev.opaqueRef = opaqueRef;
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ev.operation = operation;
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ev.snapshot = ProxyToHashtable(ProxyT, proxy);
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return ev;
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}
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public static Hashtable ProxyToHashtable(Type proxyT, object proxy)
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{
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Hashtable table = new Hashtable();
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FieldInfo[] fields = proxyT.GetFields();
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foreach (FieldInfo field in fields)
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{
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table[field.Name] = field.GetValue(proxy);
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}
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return table;
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}
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public Object get_record(String clazz, String opaqueRef, bool makeResponse)
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{
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Db.Table table = db.Tables[clazz];
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Type type = table.XapiType;
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if (!table.Rows.ContainsKey(opaqueRef))
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{
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if (makeResponse)
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{
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return typeof(Response<>).MakeGenericType(type).GetConstructor(new Type[] { typeof(bool), typeof(String[]) })
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.Invoke(new Object[] { true, new String[] { Failure.OBJECT_NO_LONGER_EXISTS, opaqueRef } });
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}
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throw new Exception(Failure.OBJECT_NO_LONGER_EXISTS);
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}
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Db.Row row = table.Rows[opaqueRef];
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Object result = Activator.CreateInstance(type);
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foreach (string propName in row.Props.Keys)
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{
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FieldInfo info = type.GetField(propName, BindingFlags.IgnoreCase | BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
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info.SetValue(result, row.Props[propName].XapiObjectValue);
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}
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if (makeResponse)
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{
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return typeof(Response<>).MakeGenericType(type).GetConstructor(new Type[] { type }).Invoke(new Object[] { result });
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}
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return result;
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}
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private void edit_record(EditTypes editType, string clazz, string opaqueRef, string field, params object[] args)
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{
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Db.Row row = db.Tables[clazz].Rows[opaqueRef];
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Db.Prop prop;
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if (row.Props.TryGetValue(field, out prop))
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{
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prop.XapiObjectValue = NewValue(editType, prop.XapiObjectValue, args);
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}
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else
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{
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prop = new Db.Prop(row, field, NewValue(editType, null, args));
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row.Props[field] = prop;
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}
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}
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private object NewValue(EditTypes editType, object fieldBefore, object[] args)
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{
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switch (editType)
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{
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case EditTypes.Replace:
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return args[0];
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case EditTypes.AddToDict:
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Hashtable ht = fieldBefore == null ? new Hashtable() : (Hashtable)fieldBefore;
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ht[args[0]] = args[1];
|
|
return ht;
|
|
|
|
case EditTypes.RemoveFromDict:
|
|
if (fieldBefore == null)
|
|
{
|
|
return new Hashtable();
|
|
}
|
|
else
|
|
{
|
|
ht = (Hashtable)fieldBefore;
|
|
ht.Remove(args[0]);
|
|
return ht;
|
|
}
|
|
|
|
case EditTypes.AddToArray:
|
|
// We only support string[] at the moment
|
|
string[] arr = fieldBefore == null ? new string[0] : (string[])fieldBefore;
|
|
List<string> list = new List<string>(arr);
|
|
if (!list.Contains((string)args[0]))
|
|
{
|
|
list.Add((string)args[0]);
|
|
}
|
|
return list.ToArray();
|
|
|
|
case EditTypes.RemoveFromArray:
|
|
if (fieldBefore == null)
|
|
{
|
|
return new string[0];
|
|
}
|
|
else
|
|
{
|
|
arr = (string[])fieldBefore;
|
|
list = new List<string>(arr);
|
|
while (list.Contains((string)args[0]))
|
|
{
|
|
list.Remove((string)args[0]);
|
|
}
|
|
return list.ToArray();
|
|
}
|
|
|
|
default:
|
|
System.Diagnostics.Trace.Assert(false);
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public string GetRandomRef(string clazz)
|
|
{
|
|
string[] refs = new string[db.Tables[clazz].Rows.Keys.Count];
|
|
db.Tables[clazz].Rows.Keys.CopyTo(refs, 0);
|
|
|
|
return refs[rand.Next(0, refs.Length)];
|
|
}
|
|
|
|
public string CopyObject(string clazz, string opaque_ref)
|
|
{
|
|
if (!db.Tables[clazz].Rows.ContainsKey(opaque_ref))
|
|
return Helper.NullOpaqueRef;
|
|
Db.Row r = db.Tables[clazz].Rows[opaque_ref].CopyOf();
|
|
string new_opaque_ref = CreateOpaqueRef();
|
|
r.Props["uuid"].XapiObjectValue = Guid.NewGuid().ToString(); // this object needs a new uuid & ref
|
|
db.Tables[clazz].Rows.Add(new_opaque_ref, r);
|
|
return new_opaque_ref;
|
|
}
|
|
|
|
public void SendCreateObject(string typeName, string opaqueRef)
|
|
{
|
|
// Make a Proxy object from the new XML
|
|
Type proxyT = TypeCache.GetProxyType(typeName);
|
|
object proxy = get_record(typeName, opaqueRef, false);
|
|
|
|
// Make a Proxy_Event representing this edit, and add it to the events queue
|
|
eventsList.Add(MakeProxyEvent(typeName, opaqueRef, "add", proxyT, proxy));
|
|
}
|
|
|
|
public void SendDestroyObject(string typeName, string opaqueRef)
|
|
{
|
|
// Make a Proxy object from the new XML
|
|
Type proxyT = TypeCache.GetProxyType(typeName);
|
|
|
|
// Make a Proxy_Event representing this edit, and add it to the events queue
|
|
eventsList.Add(MakeProxyEvent(typeName, opaqueRef, "del", proxyT, Activator.CreateInstance(proxyT)));
|
|
}
|
|
|
|
public void SendModObject(string typeName, string opaqueRef)
|
|
{
|
|
// Make a Proxy object from the new XML
|
|
Type proxyT = TypeCache.GetProxyType(typeName);
|
|
object proxy = get_record(typeName, opaqueRef, false);
|
|
|
|
// Make a Proxy_Event representing this edit, and add it to the events queue
|
|
eventsList.Add(MakeProxyEvent(typeName, opaqueRef, "mod", proxyT, proxy));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Verifies that the specified call can be made with this version of server.
|
|
/// </summary>
|
|
private void VerifyVersion(string call)
|
|
{
|
|
string version = null;
|
|
|
|
foreach (string key in callVersions.Keys)
|
|
{
|
|
if (callVersions[key].Contains(call))
|
|
{
|
|
version = key;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (version == "george")
|
|
{
|
|
if (!Helpers.GeorgeOrGreater(connection))
|
|
{
|
|
throw new NotSupportedException("Server needs to be George or greater for this call.");
|
|
}
|
|
}
|
|
else if (version == "mnr")
|
|
{
|
|
if (!Helpers.MidnightRideOrGreater(connection))
|
|
{
|
|
throw new NotSupportedException("Server needs to be Midnight Ride or greater for this call.");
|
|
}
|
|
}
|
|
}
|
|
|
|
public string CreateOpaqueRef()
|
|
{
|
|
return string.Format("OpaqueRef:{0}", Guid.NewGuid());
|
|
}
|
|
}
|
|
}
|