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// **********************************************************************
//
// Copyright (c) 2003-2017 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
using System.Diagnostics;
namespace IceInternal
{
sealed class BatchRequestI : Ice.BatchRequest
{
public BatchRequestI(BatchRequestQueue queue)
{
_queue = queue;
}
public void reset(Ice.ObjectPrx proxy, string operation, int size)
{
_proxy = proxy;
_operation = operation;
_size = size;
}
public void enqueue()
{
_queue.enqueueBatchRequest(_proxy);
}
public Ice.ObjectPrx getProxy()
{
return _proxy;
}
public string getOperation()
{
return _operation;
}
public int getSize()
{
return _size;
}
private BatchRequestQueue _queue;
private Ice.ObjectPrx _proxy;
private string _operation;
private int _size;
}
public sealed class BatchRequestQueue
{
public BatchRequestQueue(Instance instance, bool datagram)
{
Ice.InitializationData initData = instance.initializationData();
_interceptor = initData.batchRequestInterceptor;
_batchStreamInUse = false;
_batchRequestNum = 0;
_batchStream = new Ice.OutputStream(instance, Ice.Util.currentProtocolEncoding);
_batchStream.writeBlob(Protocol.requestBatchHdr);
_batchMarker = _batchStream.size();
_request = new BatchRequestI(this);
_maxSize = instance.batchAutoFlushSize();
if(_maxSize > 0 && datagram)
{
int udpSndSize = initData.properties.getPropertyAsIntWithDefault("Ice.UDP.SndSize",
65535 - _udpOverhead);
if(udpSndSize < _maxSize)
{
_maxSize = udpSndSize;
}
}
}
public void
prepareBatchRequest(Ice.OutputStream os)
{
lock(this)
{
if(_exception != null)
{
throw _exception;
}
waitStreamInUse(false);
_batchStreamInUse = true;
_batchStream.swap(os);
}
}
public void
finishBatchRequest(Ice.OutputStream os, Ice.ObjectPrx proxy, string operation)
{
//
// No need for synchronization, no other threads are supposed
// to modify the queue since we set _batchStreamInUse to true.
//
Debug.Assert(_batchStreamInUse);
_batchStream.swap(os);
try
{
_batchStreamCanFlush = true; // Allow flush to proceed even if the stream is marked in use.
if(_maxSize > 0 && _batchStream.size() >= _maxSize)
{
proxy.begin_ice_flushBatchRequests(); // Auto flush
}
Debug.Assert(_batchMarker < _batchStream.size());
if(_interceptor != null)
{
_request.reset(proxy, operation, _batchStream.size() - _batchMarker);
_interceptor.enqueue(_request, _batchRequestNum, _batchMarker);
}
else
{
bool compress;
if(((Ice.ObjectPrxHelperBase)proxy).iceReference().getCompressOverride(out compress))
{
_batchCompress |= compress;
}
_batchMarker = _batchStream.size();
++_batchRequestNum;
}
}
finally
{
lock(this)
{
_batchStream.resize(_batchMarker);
_batchStreamInUse = false;
_batchStreamCanFlush = false;
System.Threading.Monitor.PulseAll(this);
}
}
}
public void
abortBatchRequest(Ice.OutputStream os)
{
lock(this)
{
if(_batchStreamInUse)
{
_batchStream.swap(os);
_batchStream.resize(_batchMarker);
_batchStreamInUse = false;
System.Threading.Monitor.PulseAll(this);
}
}
}
public int
swap(Ice.OutputStream os, out bool compress)
{
lock(this)
{
if(_batchRequestNum == 0)
{
compress = false;
return 0;
}
waitStreamInUse(true);
byte[] lastRequest = null;
if(_batchMarker < _batchStream.size())
{
lastRequest = new byte[_batchStream.size() - _batchMarker];
Buffer buffer = _batchStream.getBuffer();
buffer.b.position(_batchMarker);
buffer.b.get(lastRequest);
_batchStream.resize(_batchMarker);
}
int requestNum = _batchRequestNum;
compress = _batchCompress;
_batchStream.swap(os);
//
// Reset the batch.
//
_batchRequestNum = 0;
_batchCompress = false;
_batchStream.writeBlob(Protocol.requestBatchHdr);
_batchMarker = _batchStream.size();
if(lastRequest != null)
{
_batchStream.writeBlob(lastRequest);
}
return requestNum;
}
}
public void
destroy(Ice.LocalException ex)
{
lock(this)
{
_exception = ex;
}
}
public bool
isEmpty()
{
lock(this)
{
return _batchStream.size() == Protocol.requestBatchHdr.Length;
}
}
private void
waitStreamInUse(bool flush)
{
//
// This is similar to a mutex lock in that the stream is
// only "locked" while marshaling. As such we don't permit the wait
// to be interrupted. Instead the interrupted status is saved and
// restored.
//
while(_batchStreamInUse && !(flush && _batchStreamCanFlush))
{
System.Threading.Monitor.Wait(this);
}
}
internal void enqueueBatchRequest(Ice.ObjectPrx proxy)
{
Debug.Assert(_batchMarker < _batchStream.size());
bool compress;
if(((Ice.ObjectPrxHelperBase)proxy).iceReference().getCompressOverride(out compress))
{
_batchCompress |= compress;
}
_batchMarker = _batchStream.size();
++_batchRequestNum;
}
private Ice.BatchRequestInterceptor _interceptor;
private Ice.OutputStream _batchStream;
private bool _batchStreamInUse;
private bool _batchStreamCanFlush;
private int _batchRequestNum;
private int _batchMarker;
private bool _batchCompress;
private BatchRequestI _request;
private Ice.LocalException _exception;
private int _maxSize;
private static int _udpOverhead = 20 + 8;
}
}
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