Created a generic RESTClient component, which simplifies querying for resources from REST based web-services.

Currently it supports a barebones scheme for specifying the path of the resource and querying asynchroneously. POST method is still wacky and a good solid scheme for handling timeout still remain.
author: Tleiades Hax 2007-10-25 09:26:47 +0000
committer: Tleiades Hax 2007-10-25 09:26:47 +0000
commit: 60e45418654975d27633a683b57c7013b98a23e3 (patch)
tree: 19e41032d405d29f203139f4c2ad62ac429fd1f1 /OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs
parent: updated libode.so (no exception on assert) (diff)
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1 files changed, 163 insertions, 0 deletions
diff --git a/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs b/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs
new file mode 100644
index 0000000..4be459d
--- /dev/null
+++ b/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs
@@ -0,0 +1,163 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+namespace OpenSim.Framework.RestClient
+{
+    internal class SimpleAsyncResult : IAsyncResult
+    {
+        private readonly AsyncCallback m_callback;
+        /// <summary>
+        /// Is process completed?
+        /// </summary>
+        /// <remarks>Should really be boolean, but VolatileRead has no boolean method</remarks>
+        private byte m_completed;
+        /// <summary>
+        /// Did process complete synchroneously?
+        /// </summary>
+        /// <remarks>I have a hard time imagining a scenario where this is the case, again, same issue about
+        /// booleans and VolatileRead as m_completed
+        /// </remarks>
+        private byte m_completedSynchronously;
+        private readonly object m_asyncState;
+        private ManualResetEvent m_waitHandle;
+        private Exception m_exception;
+        internal SimpleAsyncResult(AsyncCallback cb, object state)
+        {
+            m_callback = cb;
+            m_asyncState = state;
+            m_completed = 0;
+            m_completedSynchronously = 1;
+        }
+        #region IAsyncResult Members
+        public object AsyncState
+        {
+            get { return m_asyncState; }
+        }
+        public WaitHandle AsyncWaitHandle
+        {
+            get
+            {
+                if (m_waitHandle == null)
+                {
+                    bool done = IsCompleted;
+                    ManualResetEvent mre = new ManualResetEvent(done);
+                    if (Interlocked.CompareExchange(ref m_waitHandle, mre, null) != null)
+                    {
+                        mre.Close();
+                    }
+                    else
+                    {
+                        if (!done && IsCompleted)
+                        {
+                            m_waitHandle.Set();
+                        }
+                    }
+                }
+                return m_waitHandle;
+            }
+        }
+        public bool CompletedSynchronously
+        {
+            get { return Thread.VolatileRead(ref m_completedSynchronously) == 1; }
+        }
+        public bool IsCompleted
+        {
+            get { return Thread.VolatileRead(ref m_completed) == 1; }
+        }
+        #endregion
+        #region class Methods
+        internal void SetAsCompleted(bool completedSynchronously)
+        {
+            m_completed = 1;
+            if(completedSynchronously)
+                m_completedSynchronously = 1;
+            else
+                m_completedSynchronously = 0;
+            
+            SignalCompletion();
+        }
+        internal void HandleException(Exception e, bool completedSynchronously)
+        {
+            m_completed = 1;
+            if (completedSynchronously)
+                m_completedSynchronously = 1;
+            else
+                m_completedSynchronously = 0;
+            m_exception = e;
+            SignalCompletion();
+        }
+        private void SignalCompletion()
+        {
+            if(m_waitHandle != null) m_waitHandle.Set();
+            if(m_callback != null) m_callback(this);
+        }
+        public void EndInvoke()
+        {
+            // This method assumes that only 1 thread calls EndInvoke 
+            if (!IsCompleted)
+            {
+                // If the operation isn't done, wait for it
+                AsyncWaitHandle.WaitOne();
+                AsyncWaitHandle.Close();
+                m_waitHandle = null;  // Allow early GC
+            }
+            // Operation is done: if an exception occured, throw it
+            if (m_exception != null) throw m_exception;
+        }       
+        #endregion 
+    }
+    internal class AsyncResult<T> : SimpleAsyncResult
+    {
+        private T m_result = default(T);
+        public AsyncResult(AsyncCallback asyncCallback, Object state) :
+            base(asyncCallback, state) { }
+        public void SetAsCompleted(T result,  bool completedSynchronously)
+        {
+            // Save the asynchronous operation's result
+            m_result = result;
+            // Tell the base class that the operation completed 
+            // sucessfully (no exception)
+            base.SetAsCompleted(completedSynchronously);
+        }
+        new public T EndInvoke()
+        {
+            base.EndInvoke(); 
+            return m_result;  
+        }
+    }
+}
author	Tleiades Hax	2007-10-25 09:26:47 +0000
committer	Tleiades Hax	2007-10-25 09:26:47 +0000
commit	60e45418654975d27633a683b57c7013b98a23e3 (patch)
tree	19e41032d405d29f203139f4c2ad62ac429fd1f1 /OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs
parent	updated libode.so (no exception on assert) (diff)
download	opensim-SC_OLD-60e45418654975d27633a683b57c7013b98a23e3.zip opensim-SC_OLD-60e45418654975d27633a683b57c7013b98a23e3.tar.gz opensim-SC_OLD-60e45418654975d27633a683b57c7013b98a23e3.tar.bz2 opensim-SC_OLD-60e45418654975d27633a683b57c7013b98a23e3.tar.xz

diff --git a/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs b/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs new file mode 100644 index 0000000..4be459d --- /dev/null +++ b/OpenSim/Framework/Communications/RestClient/GenericAsyncResult.cs
@@ -0,0 +1,163 @@
	1	using System;
	2	using System.Collections.Generic;
	3	using System.Text;
	4	using System.Threading;
	5
	6	namespace OpenSim.Framework.RestClient
	7	{
	8	internal class SimpleAsyncResult : IAsyncResult
	9	{
	10
	11	private readonly AsyncCallback m_callback;
	12
	13	/// <summary>
	14	/// Is process completed?
	15	/// </summary>
	16	/// <remarks>Should really be boolean, but VolatileRead has no boolean method</remarks>
	17	private byte m_completed;
	18
	19	/// <summary>
	20	/// Did process complete synchroneously?
	21	/// </summary>
	22	/// <remarks>I have a hard time imagining a scenario where this is the case, again, same issue about
	23	/// booleans and VolatileRead as m_completed
	24	/// </remarks>
	25	private byte m_completedSynchronously;
	26
	27	private readonly object m_asyncState;
	28	private ManualResetEvent m_waitHandle;
	29	private Exception m_exception;
	30
	31	internal SimpleAsyncResult(AsyncCallback cb, object state)
	32	{
	33	m_callback = cb;
	34	m_asyncState = state;
	35	m_completed = 0;
	36	m_completedSynchronously = 1;
	37	}
	38
	39
	40	#region IAsyncResult Members
	41
	42	public object AsyncState
	43	{
	44	get { return m_asyncState; }
	45	}
	46
	47
	48
	49	public WaitHandle AsyncWaitHandle
	50	{
	51	get
	52	{
	53	if (m_waitHandle == null)
	54	{
	55	bool done = IsCompleted;
	56	ManualResetEvent mre = new ManualResetEvent(done);
	57	if (Interlocked.CompareExchange(ref m_waitHandle, mre, null) != null)
	58	{
	59	mre.Close();
	60	}
	61	else
	62	{
	63	if (!done && IsCompleted)
	64	{
	65	m_waitHandle.Set();
	66	}
	67	}
	68	}
	69	return m_waitHandle;
	70	}
	71	}
	72
	73
	74	public bool CompletedSynchronously
	75	{
	76	get { return Thread.VolatileRead(ref m_completedSynchronously) == 1; }
	77	}
	78
	79
	80	public bool IsCompleted
	81	{
	82	get { return Thread.VolatileRead(ref m_completed) == 1; }
	83	}
	84
	85
	86	#endregion
	87
	88
	89	#region class Methods
	90	internal void SetAsCompleted(bool completedSynchronously)
	91	{
	92	m_completed = 1;
	93	if(completedSynchronously)
	94	m_completedSynchronously = 1;
	95	else
	96	m_completedSynchronously = 0;
	97
	98	SignalCompletion();
	99	}
	100
	101	internal void HandleException(Exception e, bool completedSynchronously)
	102	{
	103	m_completed = 1;
	104	if (completedSynchronously)
	105	m_completedSynchronously = 1;
	106	else
	107	m_completedSynchronously = 0;
	108	m_exception = e;
	109
	110	SignalCompletion();
	111	}
	112
	113	private void SignalCompletion()
	114	{
	115	if(m_waitHandle != null) m_waitHandle.Set();
	116
	117	if(m_callback != null) m_callback(this);
	118	}
	119
	120	public void EndInvoke()
	121	{
	122	// This method assumes that only 1 thread calls EndInvoke
	123	if (!IsCompleted)
	124	{
	125	// If the operation isn't done, wait for it
	126	AsyncWaitHandle.WaitOne();
	127	AsyncWaitHandle.Close();
	128	m_waitHandle = null; // Allow early GC
	129	}
	130
	131	// Operation is done: if an exception occured, throw it
	132	if (m_exception != null) throw m_exception;
	133	}
	134
	135	#endregion
	136	}
	137
	138	internal class AsyncResult<T> : SimpleAsyncResult
	139	{
	140	private T m_result = default(T);
	141
	142	public AsyncResult(AsyncCallback asyncCallback, Object state) :
	143	base(asyncCallback, state) { }
	144
	145
	146	public void SetAsCompleted(T result, bool completedSynchronously)
	147	{
	148	// Save the asynchronous operation's result
	149	m_result = result;
	150
	151	// Tell the base class that the operation completed
	152	// sucessfully (no exception)
	153	base.SetAsCompleted(completedSynchronously);
	154	}
	155
	156	new public T EndInvoke()
	157	{
	158	base.EndInvoke();
	159	return m_result;
	160	}
	161
	162	}
	163	}