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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 "SemanticHandler.h"
#include "BrokerAdapter.h"
#include "qpid/framing/ChannelAdapter.h"
using namespace qpid::broker;
using namespace qpid::framing;
SemanticHandler::SemanticHandler(ChannelId id, Connection& c) :
connection(c),
channel(c, id, &c.broker.getStore())
{
init(id, connection.getOutput(), connection.getVersion());
adapter = std::auto_ptr<BrokerAdapter>(new BrokerAdapter(channel, connection, connection.broker, *this));
}
void SemanticHandler::handle(framing::AMQFrame& frame)
{
//TODO: assembly etc when move to 0-10 framing
//
//have potentially three separate tracks at this point:
//
// (1) execution controls
// (2) commands
// (3) data i.e. content-bearing commands
//
//framesets on each can be interleaved. framesets on the latter
//two share a command-id sequence.
//
//need to decide what to do if a frame on the command track
//arrives while a frameset on the data track is still
//open. execute it (i.e. out-of order execution with respect to
//the command id sequence) or queue it up.
//if ready to execute (i.e. if segment is complete or frame is
//message content):
handleBody(frame.getBody());
}
//ChannelAdapter virtual methods:
void SemanticHandler::handleMethodInContext(boost::shared_ptr<qpid::framing::AMQMethodBody> method,
const qpid::framing::MethodContext& context)
{
if (!method->invoke(this)) {
//else do the usual:
handleL4(method, context);
//(if the frameset is complete) we can move the execution-mark
//forward
++(incoming.hwm);
//note: need to be more sophisticated than this if we execute
//commands that arrive within an active message frameset (that
//can't happen until 0-10 framing is implemented)
}
}
void SemanticHandler::complete(u_int32_t mark)
{
//just record it for now (will eventually need to use it to ack messages):
outgoing.lwm = SequenceNumber(mark);
}
void SemanticHandler::flush()
{
//flush doubles as a sync to begin with - send an execution.complete
incoming.lwm = incoming.hwm;
send(make_shared_ptr(new ExecutionCompleteBody(getVersion(), incoming.hwm.getValue())));
}
void SemanticHandler::handleL4(boost::shared_ptr<qpid::framing::AMQMethodBody> method,
const qpid::framing::MethodContext& context)
{
try{
if(getId() != 0 && !method->isA<ChannelOpenBody>() && !isOpen()) {
if (!method->isA<ChannelCloseOkBody>()) {
std::stringstream out;
out << "Attempt to use unopened channel: " << getId();
throw ConnectionException(504, out.str());
}
} else {
adapter->setResponseTo(context.getRequestId());
method->invoke(*adapter, context);
adapter->setResponseTo(0);
}
}catch(ChannelException& e){
adapter->setResponseTo(0);
adapter->getProxy().getChannel().close(
e.code, e.toString(),
method->amqpClassId(), method->amqpMethodId());
connection.closeChannel(getId());
}catch(ConnectionException& e){
connection.close(e.code, e.toString(), method->amqpClassId(), method->amqpMethodId());
}catch(std::exception& e){
connection.close(541/*internal error*/, e.what(), method->amqpClassId(), method->amqpMethodId());
}
}
bool SemanticHandler::isOpen() const
{
return channel.isOpen();
}
void SemanticHandler::handleHeader(boost::shared_ptr<qpid::framing::AMQHeaderBody> body)
{
channel.handleHeader(body);
}
void SemanticHandler::handleContent(boost::shared_ptr<qpid::framing::AMQContentBody> body)
{
channel.handleContent(body);
}
void SemanticHandler::handleHeartbeat(boost::shared_ptr<qpid::framing::AMQHeartbeatBody> body)
{
channel.handleHeartbeat(body);
}
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