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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 "ExecutionHandler.h"
#include "qpid/Exception.h"
#include "qpid/framing/BasicDeliverBody.h"
#include "qpid/framing/MessageTransferBody.h"
#include "qpid/framing/AMQP_HighestVersion.h"
#include "qpid/framing/all_method_bodies.h"
using namespace qpid::client;
using namespace qpid::framing;
using namespace boost;
bool isMessageMethod(AMQMethodBody* method)
{
return method->isA<BasicDeliverBody>() || method->isA<MessageTransferBody>() || method->isA<BasicGetOkBody>();
}
bool isMessageMethod(AMQBody* body)
{
AMQMethodBody* method=body->getMethod();
return method && isMessageMethod(method);
}
bool isContentFrame(AMQFrame& frame)
{
AMQBody* body = frame.getBody();
uint8_t type = body->type();
return type == HEADER_BODY || type == CONTENT_BODY || isMessageMethod(body);
}
bool invoke(AMQBody* body, Invocable* target)
{
AMQMethodBody* method=body->getMethod();
return method && method->invoke(target);
}
ExecutionHandler::ExecutionHandler(uint64_t _maxFrameSize) :
version(framing::highestProtocolVersion), maxFrameSize(_maxFrameSize) {}
//incoming:
void ExecutionHandler::handle(AMQFrame& frame)
{
AMQBody* body = frame.getBody();
if (!invoke(body, this)) {
if (isContentFrame(frame)) {
if (!arriving) {
arriving = FrameSet::shared_ptr(new FrameSet(++incoming.hwm));
}
arriving->append(frame);
if (arriving->isComplete()) {
received.push(arriving);
arriving.reset();
}
} else {
++incoming.hwm;
correlation.receive(body->getMethod());
}
}
}
void ExecutionHandler::complete(uint32_t cumulative, const SequenceNumberSet& range)
{
SequenceNumber mark(cumulative);
if (outgoing.lwm < mark) {
outgoing.lwm = mark;
completion.completed(outgoing.lwm);
}
if (range.size() % 2) { //must be even number
throw ConnectionException(530, "Received odd number of elements in ranged mark");
} else {
//TODO: need to manage (record and accumulate) ranges such
//that we can implictly move the mark when appropriate
//TODO: signal listeners of early notification?
}
}
void ExecutionHandler::flush()
{
//send completion
incoming.lwm = incoming.hwm;
}
void ExecutionHandler::noop()
{
//do nothing
}
void ExecutionHandler::result(uint32_t /*command*/, const std::string& /*data*/)
{
//TODO: need to signal the result to the appropriate listener
}
void ExecutionHandler::sync()
{
//TODO: implement (the application is in charge of completion of
//some commands, so need to track completion for them).
//This shouldn't ever need to be called by the server (in my
//opinion) as the server never needs to synchronise with the
//clients execution
}
void ExecutionHandler::sendFlush()
{
AMQFrame frame(0, ExecutionFlushBody());
out(frame);
}
void ExecutionHandler::send(const AMQBody& command, CompletionTracker::Listener f, Correlator::Listener g)
{
//allocate id:
++outgoing.hwm;
//register listeners if necessary:
if (f) {
completion.listen(outgoing.hwm, f);
}
if (g) {
correlation.listen(g);
}
AMQFrame frame(0/*id will be filled in be channel handler*/, command);
out(frame);
}
void ExecutionHandler::sendContent(const AMQBody& command, const BasicHeaderProperties& headers, const std::string& data,
CompletionTracker::Listener f, Correlator::Listener g)
{
send(command, f, g);
AMQHeaderBody header;
BasicHeaderProperties::copy(*header.get<BasicHeaderProperties>(true), headers);
header.get<BasicHeaderProperties>(true)->setContentLength(data.size());
AMQFrame h(0, header);
out(h);
u_int64_t data_length = data.length();
if(data_length > 0){
//frame itself uses 8 bytes
u_int32_t frag_size = maxFrameSize - 8;
if(data_length < frag_size){
AMQFrame frame(0, AMQContentBody(data));
out(frame);
}else{
u_int32_t offset = 0;
u_int32_t remaining = data_length - offset;
while (remaining > 0) {
u_int32_t length = remaining > frag_size ? frag_size : remaining;
string frag(data.substr(offset, length));
AMQFrame frame(0, AMQContentBody(frag));
out(frame);
offset += length;
remaining = data_length - offset;
}
}
}
}
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