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// **********************************************************************
//
// Copyright (c) 2003-2004 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 <Glacier2/RequestQueue.h>
#include <set>
using namespace std;
using namespace Ice;
using namespace Glacier2;
Glacier2::Request::Request(const ObjectPrx& proxy, const ByteSeq& inParams, const Current& current,
bool forwardContext, const AMD_Object_ice_invokePtr& amdCB) :
_proxy(proxy),
_inParams(inParams),
_current(current),
_forwardContext(forwardContext),
_amdCB(amdCB)
{
//
// If this is not a twoway call, we can finish the AMD call right
// away.
//
if(!_proxy->ice_isTwoway())
{
bool ok = true;
ByteSeq outParams;
_amdCB->ice_response(ok, outParams);
}
Context::const_iterator p = current.ctx.find("_ovrd");
if(p != current.ctx.end())
{
const_cast<string&>(_override) = p->second;
}
}
void
Glacier2::Request::invoke()
{
bool ok;
ByteSeq outParams;
try
{
if(_forwardContext)
{
ok = _proxy->ice_invoke(_current.operation, _current.mode, _inParams, outParams, _current.ctx);
}
else
{
ok = _proxy->ice_invoke(_current.operation, _current.mode, _inParams, outParams);
}
if(_proxy->ice_isTwoway())
{
_amdCB->ice_response(ok, outParams);
}
}
catch(const LocalException& ex)
{
if(_proxy->ice_isTwoway())
{
_amdCB->ice_exception(ex);
}
}
}
bool
Glacier2::Request::override(const RequestPtr& other) const
{
//
// Both override values have to be non-empty.
//
if(_override.empty() || other->_override.empty())
{
return false;
}
//
// Override does not work for twoways, because a response is
// expected for each request.
//
if(_proxy->ice_isTwoway() || other->_proxy->ice_isTwoway())
{
return false;
}
//
// We cannot override if the proxies differ.
//
if(_proxy != other->_proxy)
{
return false;
}
return _override == other->_override;
}
bool
Glacier2::Request::isBatch() const
{
return _proxy->ice_batchOneway() || _proxy->ice_batchDatagram();
}
ConnectionPtr
Glacier2::Request::getConnection() const
{
return _proxy->ice_connection();
}
Glacier2::RequestQueue::RequestQueue(const IceUtil::Time& sleepTime) :
_sleepTime(sleepTime),
_destroy(false)
{
}
Glacier2::RequestQueue::~RequestQueue()
{
IceUtil::Monitor<IceUtil::Mutex>::Lock lock(*this);
assert(_destroy);
assert(_requests.empty());
}
void
Glacier2::RequestQueue::destroy()
{
{
IceUtil::Monitor<IceUtil::Mutex>::Lock lock(*this);
assert(!_destroy);
_destroy = true;
notify();
_requests.clear();
}
//
// We don't want to wait for the RequestQueue thread, because this
// destroy() operation is called when sessions expire or are
// destroyed, in which case we do not want the session handler
// thread to block here.
//
//getThreadControl().join();
if(getThreadControl().isAlive())
{
getThreadControl().detach();
}
}
bool
Glacier2::RequestQueue::addRequest(const RequestPtr& request)
{
IceUtil::Monitor<IceUtil::Mutex>::Lock lock(*this);
assert(!_destroy);
for(vector<RequestPtr>::iterator p = _requests.begin(); p != _requests.end(); ++p)
{
//
// If the new request overrides an old one, then abort the old
// request and replace it with the new request.
//
if(request->override(*p))
{
*p = request;
return true;
}
}
//
// No override, we add the new request.
//
_requests.push_back(request);
notify();
return false;
}
void
Glacier2::RequestQueue::run()
{
while(true)
{
vector<RequestPtr> requests;
{
IceUtil::Monitor<IceUtil::Mutex>::Lock lock(*this);
//
// Wait indefinitely if there's no requests to send.
//
while(!_destroy && _requests.empty())
{
wait();
}
if(_destroy)
{
return;
}
requests.swap(_requests);
}
//
// Send requests, flush batch requests, and sleep outside the
// thread synchronization, so that new messages can be added
// while this is being done.
//
set<ConnectionPtr> flushSet;
for(vector<RequestPtr>::const_iterator p = requests.begin(); p != requests.end(); ++p)
{
if((*p)->isBatch())
{
flushSet.insert((*p)->getConnection());
}
(*p)->invoke();
}
for(set<ConnectionPtr>::const_iterator q = flushSet.begin(); q != flushSet.end(); ++q)
{
try
{
for_each(flushSet.begin(), flushSet.end(), Ice::voidMemFun(&Connection::flushBatchRequests));
}
catch(const LocalException&)
{
// Ignore.
}
}
//
// In order to avoid flooding, we add a delay, if so
// requested.
//
if(_sleepTime > IceUtil::Time())
{
IceUtil::ThreadControl::sleep(_sleepTime);
}
}
}
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