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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.
//
// **********************************************************************
#include <Ice/BatchRequestQueue.h>
#include <Ice/Instance.h>
#include <Ice/Properties.h>
#include <Ice/Reference.h>
using namespace std;
using namespace Ice;
using namespace IceInternal;
IceUtil::Shared* IceInternal::upCast(BatchRequestQueue* p) { return p; }
namespace
{
const int udpOverhead = 20 + 8;
class BatchRequestI : public Ice::BatchRequest
{
public:
BatchRequestI(BatchRequestQueue& queue, const Ice::ObjectPrxPtr& proxy, const string& operation, int size) :
_queue(queue), _proxy(proxy), _operation(operation), _size(size)
{
}
virtual void
enqueue() const
{
_queue.enqueueBatchRequest(_proxy);
}
virtual int
getSize() const
{
return _size;
}
virtual const std::string&
getOperation() const
{
return _operation;
}
virtual const Ice::ObjectPrxPtr&
getProxy() const
{
return _proxy;
}
private:
BatchRequestQueue& _queue;
const Ice::ObjectPrxPtr& _proxy;
const std::string& _operation;
const int _size;
};
}
BatchRequestQueue::BatchRequestQueue(const InstancePtr& instance, bool datagram) :
_interceptor(instance->initializationData().batchRequestInterceptor),
_batchStream(instance.get(), Ice::currentProtocolEncoding),
_batchStreamInUse(false),
_batchStreamCanFlush(false),
_batchCompress(false),
_batchRequestNum(0)
{
_batchStream.writeBlob(requestBatchHdr, sizeof(requestBatchHdr));
_batchMarker = _batchStream.b.size();
_maxSize = instance->batchAutoFlushSize();
if(_maxSize > 0 && datagram)
{
const Ice::InitializationData& initData = instance->initializationData();
size_t udpSndSize = initData.properties->getPropertyAsIntWithDefault("Ice.UDP.SndSize", 65535 - udpOverhead);
if(udpSndSize < _maxSize)
{
_maxSize = udpSndSize;
}
}
}
void
BatchRequestQueue::prepareBatchRequest(OutputStream* os)
{
Lock sync(*this);
if(_exception)
{
_exception->ice_throw();
}
waitStreamInUse(false);
_batchStreamInUse = true;
_batchStream.swap(*os);
}
void
BatchRequestQueue::finishBatchRequest(OutputStream* os,
const Ice::ObjectPrxPtr& proxy,
const std::string& operation)
{
//
// No need for synchronization, no other threads are supposed
// to modify the queue since we set _batchStreamInUse to true.
//
assert(_batchStreamInUse);
_batchStream.swap(*os);
try
{
_batchStreamCanFlush = true; // Allow flush to proceed even if the stream is marked in use.
if(_maxSize > 0 && _batchStream.b.size() >= _maxSize)
{
#ifdef ICE_CPP11_MAPPING
proxy->ice_flushBatchRequestsAsync();
#else
proxy->begin_ice_flushBatchRequests();
#endif
}
assert(_batchMarker < _batchStream.b.size());
if(_interceptor)
{
BatchRequestI request(*this, proxy, operation, static_cast<int>(_batchStream.b.size() - _batchMarker));
#ifdef ICE_CPP11_MAPPING
_interceptor(request, _batchRequestNum, static_cast<int>(_batchMarker));
#else
_interceptor->enqueue(request, _batchRequestNum, static_cast<int>(_batchMarker));
#endif
}
else
{
bool compress;
if(proxy->_getReference()->getCompressOverride(compress))
{
_batchCompress |= compress;
}
_batchMarker = _batchStream.b.size();
++_batchRequestNum;
}
Lock sync(*this);
_batchStream.resize(_batchMarker);
_batchStreamInUse = false;
_batchStreamCanFlush = false;
notifyAll();
}
catch(const std::exception&)
{
Lock sync(*this);
_batchStream.resize(_batchMarker);
_batchStreamInUse = false;
_batchStreamCanFlush = false;
notifyAll();
throw;
}
}
void
BatchRequestQueue::abortBatchRequest(OutputStream* os)
{
Lock sync(*this);
if(_batchStreamInUse)
{
_batchStream.swap(*os);
_batchStream.resize(_batchMarker);
_batchStreamInUse = false;
notifyAll();
}
}
int
BatchRequestQueue::swap(OutputStream* os, bool& compress)
{
Lock sync(*this);
if(_batchRequestNum == 0)
{
return 0;
}
waitStreamInUse(true);
vector<Ice::Byte> lastRequest;
if(_batchMarker < _batchStream.b.size())
{
vector<Ice::Byte>(_batchStream.b.begin() + _batchMarker, _batchStream.b.end()).swap(lastRequest);
_batchStream.b.resize(_batchMarker);
}
int requestNum = _batchRequestNum;
_batchStream.swap(*os);
compress = _batchCompress;
//
// Reset the batch.
//
_batchRequestNum = 0;
_batchCompress = false;
_batchStream.writeBlob(requestBatchHdr, sizeof(requestBatchHdr));
_batchMarker = _batchStream.b.size();
if(!lastRequest.empty())
{
_batchStream.writeBlob(&lastRequest[0], lastRequest.size());
}
return requestNum;
}
void
BatchRequestQueue::destroy(const Ice::LocalException& ex)
{
Lock sync(*this);
#ifdef ICE_CPP11_MAPPING
_exception = ex.ice_clone();
#else
_exception.reset(ex.ice_clone());
#endif
}
bool
BatchRequestQueue::isEmpty()
{
Lock sync(*this);
return _batchStream.b.size() == sizeof(requestBatchHdr);
}
void
BatchRequestQueue::waitStreamInUse(bool flush)
{
while(_batchStreamInUse && !(flush && _batchStreamCanFlush))
{
wait();
}
}
void
BatchRequestQueue::enqueueBatchRequest(const Ice::ObjectPrxPtr& proxy)
{
assert(_batchMarker < _batchStream.b.size());
bool compress;
if(proxy->_getReference()->getCompressOverride(compress))
{
_batchCompress |= compress;
}
_batchMarker = _batchStream.b.size();
++_batchRequestNum;
}
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