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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 <iostream>
#include "qpid/log/Statement.h"
#include "qpid/QpidError.h"
#include "qpid/sys/Time.h"
#include "qpid/framing/AMQFrame.h"
#include "Connector.h"
#include "qpid/sys/AsynchIO.h"
#include "qpid/sys/Dispatcher.h"
#include "qpid/sys/Poller.h"
#include <boost/bind.hpp>
namespace qpid {
namespace client {
using namespace qpid::sys;
using namespace qpid::framing;
using qpid::QpidError;
Connector::Connector(
ProtocolVersion ver, bool _debug, uint32_t buffer_size
) : debug(_debug),
receive_buffer_size(buffer_size),
send_buffer_size(buffer_size),
version(ver),
closed(true),
timeout(0),
idleIn(0), idleOut(0),
timeoutHandler(0),
shutdownHandler(0),
outbuf(send_buffer_size)
{ }
Connector::~Connector(){
if (receiver.id()) {
receiver.join();
}
}
void Connector::connect(const std::string& host, int port){
socket.connect(host, port);
closed = false;
poller = Poller::shared_ptr(new Poller);
receiver = Thread(this);
}
void Connector::init(){
ProtocolInitiation init(version);
writeBlock(&init);
}
// Call with closedLock held
bool Connector::closeInternal() {
Mutex::ScopedLock l(closedLock);
if (!closed) {
poller->shutdown();
closed = true;
return true;
}
return false;
}
void Connector::close() {
closeInternal();
}
void Connector::setInputHandler(InputHandler* handler){
input = handler;
}
void Connector::setShutdownHandler(ShutdownHandler* handler){
shutdownHandler = handler;
}
OutputHandler* Connector::getOutputHandler(){
return this;
}
// TODO: astitcher 20070908: Writing still needs to be transferred to the aynchronous IO
// framework.
void Connector::send(AMQFrame& frame){
writeBlock(&frame);
QPID_LOG(trace, "SENT: " << frame);
}
void Connector::writeBlock(AMQDataBlock* data){
Mutex::ScopedLock l(writeLock);
data->encode(outbuf);
//transfer data to wire
outbuf.flip();
writeToSocket(outbuf.start(), outbuf.available());
outbuf.clear();
}
void Connector::writeToSocket(char* data, size_t available){
size_t written = 0;
while(written < available && !closed){
ssize_t sent = socket.send(data + written, available-written);
if(sent > 0) {
lastOut = now();
written += sent;
}
}
}
void Connector::handleClosed() {
if (closeInternal() && shutdownHandler)
shutdownHandler->shutdown();
}
// TODO: astitcher 20070908: This version of the code can never time out, so the idle processing
// can never be called. The timeut processing needs to be added into the underlying Dispatcher code
//
// TODO: astitcher 20070908: EOF is dealt with separately now via a callback to eof
void Connector::checkIdle(ssize_t status){
if(timeoutHandler){
AbsTime t = now();
if(status == Socket::SOCKET_TIMEOUT) {
if(idleIn && (Duration(lastIn, t) > idleIn)){
timeoutHandler->idleIn();
}
}
else if(status == 0 || status == Socket::SOCKET_EOF) {
handleClosed();
}
else {
lastIn = t;
}
if(idleOut && (Duration(lastOut, t) > idleOut)){
timeoutHandler->idleOut();
}
}
}
void Connector::setReadTimeout(uint16_t t){
idleIn = t * TIME_SEC;//t is in secs
if(idleIn && (!timeout || idleIn < timeout)){
timeout = idleIn;
setSocketTimeout();
}
}
void Connector::setWriteTimeout(uint16_t t){
idleOut = t * TIME_SEC;//t is in secs
if(idleOut && (!timeout || idleOut < timeout)){
timeout = idleOut;
setSocketTimeout();
}
}
void Connector::setSocketTimeout(){
socket.setTimeout(timeout);
}
void Connector::setTimeoutHandler(TimeoutHandler* handler){
timeoutHandler = handler;
}
// Buffer definition
struct Buff : public AsynchIO::Buffer {
Buff() :
AsynchIO::Buffer(new char[65536], 65536)
{}
~Buff()
{ delete [] bytes;}
};
void Connector::readbuff(AsynchIO& aio, AsynchIO::Buffer* buff) {
framing::Buffer in(buff->bytes+buff->dataStart, buff->dataCount);
AMQFrame frame(version);
while(frame.decode(in)){
QPID_LOG(trace, "RECV: " << frame);
input->received(frame);
}
// TODO: unreading needs to go away, and when we can cope
// with multiple sub-buffers in the general buffer scheme, it will
if (in.available() != 0) {
// Adjust buffer for used bytes and then "unread them"
buff->dataStart += buff->dataCount-in.available();
buff->dataCount = in.available();
aio.unread(buff);
} else {
// Give whole buffer back to aio subsystem
aio.queueReadBuffer(buff);
}
}
void Connector::eof(AsynchIO&) {
handleClosed();
}
// TODO: astitcher 20070908 This version of the code can never time out, so the idle processing
// will never be called
void Connector::run(){
try {
Dispatcher d(poller);
AsynchIO* aio = new AsynchIO(socket,
boost::bind(&Connector::readbuff, this, _1, _2),
boost::bind(&Connector::eof, this, _1),
boost::bind(&Connector::eof, this, _1));
for (int i = 0; i < 32; i++) {
aio->queueReadBuffer(new Buff);
}
aio->start(poller);
d.run();
aio->queueForDeletion();
socket.close();
} catch (const std::exception& e) {
QPID_LOG(error, e.what());
handleClosed();
}
}
}} // namespace qpid::client
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