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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.
*
*/
#include "ChannelHandler.h"
#include "qpid/framing/amqp_framing.h"
#include "qpid/framing/all_method_bodies.h"
using namespace qpid::client;
using namespace qpid::framing;
using namespace boost;
ChannelHandler::ChannelHandler() : StateManager(CLOSED), id(0) {}
void ChannelHandler::incoming(AMQFrame& frame)
{
AMQBody* body = frame.getBody();
if (getState() == OPEN) {
ChannelCloseBody* closeBody=
dynamic_cast<ChannelCloseBody*>(body->getMethod());
if (closeBody) {
setState(CLOSED);
if (onClose) {
onClose(closeBody->getReplyCode(), closeBody->getReplyText());
}
} else {
try {
in(frame);
}catch(ChannelException& e){
AMQMethodBody* method=body->getMethod();
if (method)
close(e.code, e.toString(),
method->amqpClassId(), method->amqpMethodId());
else
close(e.code, e.toString(), 0, 0);
}
}
} else {
if (body->getMethod())
handleMethod(body->getMethod());
else
throw new ConnectionException(504, "Channel not open.");
}
}
void ChannelHandler::outgoing(AMQFrame& frame)
{
if (getState() == OPEN) {
frame.setChannel(id);
out(frame);
} else {
throw Exception("Channel not open");
}
}
void ChannelHandler::open(uint16_t _id)
{
id = _id;
setState(OPENING);
AMQFrame f(id, ChannelOpenBody(version));
out(f);
std::set<int> states;
states.insert(OPEN);
states.insert(CLOSED);
waitFor(states);
if (getState() != OPEN) {
throw Exception("Failed to open channel.");
}
}
void ChannelHandler::close(uint16_t code, const std::string& message, uint16_t classId, uint16_t methodId)
{
setState(CLOSING);
AMQFrame f(id, ChannelCloseBody(version, code, message, classId, methodId));
out(f);
}
void ChannelHandler::close()
{
close(200, "OK", 0, 0);
waitFor(CLOSED);
}
void ChannelHandler::handleMethod(AMQMethodBody* method)
{
switch (getState()) {
case OPENING:
if (method->isA<ChannelOpenOkBody>()) {
setState(OPEN);
} else {
throw ConnectionException(504, "Channel not opened.");
}
break;
case CLOSING:
if (method->isA<ChannelCloseOkBody>()) {
setState(CLOSED);
} //else just ignore it
break;
case CLOSED:
throw ConnectionException(504, "Channel not opened.");
default:
throw Exception("Unexpected state encountered in ChannelHandler!");
}
}
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