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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 "../shared_ptr.h"
#include "BodyHandler.h"
#include "Requester.h"
#include "Responder.h"
#include "Correlator.h"
#include "amqp_types.h"
namespace qpid {
namespace framing {
class MethodContext;
// FIXME aconway 2007-02-20: Rename as ChannelBase or just Channel.
/**
* Base class for client and broker channels.
*
* - receives frame bodies from the network.
* - Updates request/response data.
* - Dispatches requests with a MethodContext for responses.
*
* send()
* - 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:
/**
*@param output Processed frames are forwarded to this handler.
*/
ChannelAdapter(ChannelId id_=0, OutputHandler* out_=0,
ProtocolVersion ver=ProtocolVersion())
: id(id_), out(out_), version(ver) {}
/** Initialize the channel adapter. */
void init(ChannelId, OutputHandler&, ProtocolVersion);
ChannelId getId() const { return id; }
ProtocolVersion getVersion() const { return version; }
/**
* Send a frame.
*@param body Body of the frame.
*@param action optional action to execute when we receive a
*response to this frame. Ignored if body is not a Request.
*@return If body is a request, the ID assigned else 0.
*/
RequestId send(shared_ptr<AMQBody> body,
Correlator::Action action=Correlator::Action());
// TODO aconway 2007-04-05: remove and use make_shared_ptr at call sites.
/**@deprecated Use make_shared_ptr with the other send() override */
RequestId send(AMQBody* body) { return send(AMQBody::shared_ptr(body)); }
void handleMethod(shared_ptr<AMQMethodBody>);
void handleRequest(shared_ptr<AMQRequestBody>);
void handleResponse(shared_ptr<AMQResponseBody>);
virtual bool isOpen() const = 0;
protected:
void assertMethodOk(AMQMethodBody& method) const;
void assertChannelOpen() const;
void assertChannelNotOpen() const;
virtual void handleMethodInContext(
shared_ptr<AMQMethodBody> method,
const MethodContext& context) = 0;
RequestId getFirstAckRequest() { return requester.getFirstAckRequest(); }
RequestId getLastAckRequest() { return requester.getLastAckRequest(); }
RequestId getNextSendRequestId() { return requester.getNextId(); }
private:
ChannelId id;
OutputHandler* out;
ProtocolVersion version;
Requester requester;
Responder responder;
Correlator correlator;
};
}}
#endif
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