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/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#ifndef _Future_
#define _Future_
#include <boost/bind.hpp>
#include <boost/shared_ptr.hpp>
#include "qpid/Exception.h"
#include "qpid/framing/SequenceNumber.h"
#include "qpid/framing/StructHelper.h"
#include "FutureCompletion.h"
#include "FutureResponse.h"
#include "FutureResult.h"
#include "SessionCore.h"
namespace qpid {
namespace client {
class Future : private framing::StructHelper
{
framing::SequenceNumber command;
boost::shared_ptr<FutureResponse> response;
boost::shared_ptr<FutureResult> result;
bool complete;
public:
Future() : complete(false) {}
Future(const framing::SequenceNumber& id) : command(id), complete(false) {}
void sync(SessionCore& session)
{
if (!isComplete(session)) {
session.getExecution().syncTo(command);
wait(session);
}
}
void wait(SessionCore& session)
{
if (!isComplete(session)) {
FutureCompletion callback;
session.getExecution().getCompletionTracker().listenForCompletion(
command,
boost::bind(&FutureCompletion::completed, &callback)
);
callback.waitForCompletion();
session.assertOpen();
complete = true;
}
}
framing::AMQMethodBody* getResponse(SessionCore& session)
{
if (response) {
session.getExecution().getCompletionTracker().listenForCompletion(
command,
boost::bind(&FutureResponse::completed, response)
);
return response->getResponse(session);
} else {
throw Exception("Response not expected");
}
}
template <class T> void decodeResult(T& value, SessionCore& session)
{
if (result) {
decode(value, result->getResult(session));
} else {
throw Exception("Result not expected");
}
}
bool isComplete(SessionCore& session) {
return complete || session.getExecution().isComplete(command);
}
bool isCompleteUpTo(SessionCore& session) {
return complete || session.getExecution().isCompleteUpTo(command);
}
void setCommandId(const framing::SequenceNumber& id) { command = id; }
void setFutureResponse(boost::shared_ptr<FutureResponse> r) { response = r; }
void setFutureResult(boost::shared_ptr<FutureResult> r) { result = r; }
};
}}
#endif
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