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#ifndef _ChannelAdapter_
#define _ChannelAdapter_
/*
*
* 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.
*
*/
#include <boost/shared_ptr.hpp>
#include "BodyHandler.h"
#include "Requester.h"
#include "Responder.h"
#include "OutputHandler.h"
namespace qpid {
namespace framing {
class MethodContext;
/**
* Base class for client and broker channel adapters.
*
* As BodyHandler:
* - receives frame bodies from the network.
* - Updates request/response data.
* - Dispatches requests with a MethodContext for responses.
*
* As OutputHandler:
* - Updates request/resposne ID data.
* - Forwards frame to the peer.
*
* Thread safety: OBJECT UNSAFE. Instances must not be called
* concurrently. AMQP defines channels to be serialized.
*/
class ChannelAdapter : public BodyHandler, public OutputHandler {
public:
/**
*@param output Processed frames are forwarded to this handler.
*/
ChannelAdapter() : context(0, 0), id(0), out(0) {}
/** Initialize the channel adapter. */
void init(ChannelId, OutputHandler&, const ProtocolVersion&);
ChannelId getId() const { return id; }
const ProtocolVersion& getVersion() const { return version; }
/**
* Do request/response-id processing and then forward to
* handler provided to constructor. Response frames should
* have their request-id set before calling send.
*/
void send(AMQFrame* frame);
/**
* Wrap body in a frame and send the frame.
* Takes ownership of body.
*/
void send(AMQBody::shared_ptr body);
void send(AMQBody* body) { send(AMQBody::shared_ptr(body)); }
void handleMethod(boost::shared_ptr<qpid::framing::AMQMethodBody>);
void handleRequest(boost::shared_ptr<qpid::framing::AMQRequestBody>);
void handleResponse(boost::shared_ptr<qpid::framing::AMQResponseBody>);
virtual bool isOpen() const = 0;
protected:
void assertMethodOk(AMQMethodBody& method) const;
void assertChannelOpen() const;
void assertChannelNotOpen() const;
virtual void handleMethodInContext(
boost::shared_ptr<qpid::framing::AMQMethodBody> method,
const MethodContext& context) = 0;
RequestId getRequestInProgress() { return requestInProgress; }
protected:
MethodContext context;
private:
ChannelId id;
OutputHandler* out;
ProtocolVersion version;
Requester requester;
Responder responder;
RequestId requestInProgress; // TODO aconway 2007-01-24: use it.
};
}}
#endif
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