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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 "MessageBuilder.h"
#include "Message.h"
#include "MessageStore.h"
#include "qpid/framing/AMQFrame.h"
#include "qpid/framing/reply_exceptions.h"
using boost::intrusive_ptr;
using namespace qpid::broker;
using namespace qpid::framing;
namespace
{
std::string type_str(uint8_t type);
}
MessageBuilder::MessageBuilder(MessageStore* const _store, uint64_t _stagingThreshold) :
state(DORMANT), store(_store), stagingThreshold(_stagingThreshold), staging(false) {}
void MessageBuilder::handle(AMQFrame& frame)
{
uint8_t type = frame.getBody()->type();
switch(state) {
case METHOD:
checkType(METHOD_BODY, type);
state = HEADER;
break;
case HEADER:
if (type == CONTENT_BODY) {
//TODO: rethink how to handle non-existent headers(?)...
//didn't get a header: add in a dummy
AMQFrame header;
header.setBody(AMQHeaderBody());
header.setBof(false);
header.setEof(false);
message->getFrames().append(header);
} else if (type != HEADER_BODY) {
throw CommandInvalidException(
QPID_MSG("Invalid frame sequence for message, expected header or content got "
<< type_str(type) << ")"));
}
state = CONTENT;
break;
case CONTENT:
checkType(CONTENT_BODY, type);
break;
default:
throw CommandInvalidException(QPID_MSG("Invalid frame sequence for message (state=" << state << ")"));
}
if (staging) {
intrusive_ptr<const PersistableMessage> cpmsg = boost::static_pointer_cast<const PersistableMessage>(message);
store->appendContent(cpmsg, frame.castBody<AMQContentBody>()->getData());
} else {
message->getFrames().append(frame);
//have we reached the staging limit? if so stage message and release content
if (state == CONTENT && stagingThreshold && message->getFrames().getContentSize() >= stagingThreshold) {
message->releaseContent(store);
staging = true;
}
}
}
void MessageBuilder::end()
{
message = 0;
state = DORMANT;
staging = false;
}
void MessageBuilder::start(const SequenceNumber& id)
{
message = intrusive_ptr<Message>(new Message(id));
state = METHOD;
staging = false;
}
namespace {
const std::string HEADER_BODY_S = "HEADER";
const std::string METHOD_BODY_S = "METHOD";
const std::string CONTENT_BODY_S = "CONTENT";
const std::string HEARTBEAT_BODY_S = "HEARTBEAT";
const std::string UNKNOWN = "unknown";
std::string type_str(uint8_t type)
{
switch(type) {
case METHOD_BODY: return METHOD_BODY_S;
case HEADER_BODY: return HEADER_BODY_S;
case CONTENT_BODY: return CONTENT_BODY_S;
case HEARTBEAT_BODY: return HEARTBEAT_BODY_S;
}
return UNKNOWN;
}
}
void MessageBuilder::checkType(uint8_t expected, uint8_t actual)
{
if (expected != actual) {
throw CommandInvalidException(QPID_MSG("Invalid frame sequence for message (expected "
<< type_str(expected) << " got " << type_str(actual) << ")"));
}
}
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