| /* |
| * |
| * 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 "Connection.h" |
| #include "qpid/log/Statement.h" |
| #include "qpid/amqp_0_10/exceptions.h" |
| #include "qpid/framing/AMQFrame.h" |
| #include "qpid/framing/Buffer.h" |
| #include "qpid/framing/ProtocolInitiation.h" |
| |
| namespace qpid { |
| namespace amqp_0_10 { |
| |
| using sys::Mutex; |
| |
| Connection::Connection(sys::OutputControl& o, const std::string& id, bool _isClient) |
| : frameQueueClosed(false), output(o), identifier(id), initialized(false), isClient(_isClient), buffered(0) |
| {} |
| |
| void Connection::setInputHandler(std::auto_ptr<sys::ConnectionInputHandler> c) { |
| connection = c; |
| } |
| |
| size_t Connection::decode(const char* buffer, size_t size) { |
| framing::Buffer in(const_cast<char*>(buffer), size); |
| if (isClient && !initialized) { |
| //read in protocol header |
| framing::ProtocolInitiation pi; |
| if (pi.decode(in)) { |
| //TODO: check the version is correct |
| QPID_LOG(trace, "RECV " << identifier << " INIT(" << pi << ")"); |
| } |
| initialized = true; |
| } |
| framing::AMQFrame frame; |
| while(frame.decode(in)) { |
| QPID_LOG(trace, "RECV [" << identifier << "]: " << frame); |
| connection->received(frame); |
| } |
| return in.getPosition(); |
| } |
| |
| bool Connection::canEncode() { |
| if (!frameQueueClosed) connection->doOutput(); |
| Mutex::ScopedLock l(frameQueueLock); |
| return (!isClient && !initialized) || !frameQueue.empty(); |
| } |
| |
| bool Connection::isClosed() const { |
| Mutex::ScopedLock l(frameQueueLock); |
| return frameQueueClosed; |
| } |
| |
| size_t Connection::encode(const char* buffer, size_t size) { |
| { // Swap frameQueue data into workQueue to avoid holding lock while we encode. |
| Mutex::ScopedLock l(frameQueueLock); |
| assert(workQueue.empty()); |
| workQueue.swap(frameQueue); |
| } |
| framing::Buffer out(const_cast<char*>(buffer), size); |
| if (!isClient && !initialized) { |
| framing::ProtocolInitiation pi(getVersion()); |
| pi.encode(out); |
| initialized = true; |
| QPID_LOG(trace, "SENT " << identifier << " INIT(" << pi << ")"); |
| } |
| size_t frameSize=0; |
| size_t encoded=0; |
| while (!workQueue.empty() && ((frameSize=workQueue.front().encodedSize()) <= out.available())) { |
| workQueue.front().encode(out); |
| QPID_LOG(trace, "SENT [" << identifier << "]: " << workQueue.front()); |
| workQueue.pop_front(); |
| encoded += frameSize; |
| if (workQueue.empty() && out.available() > 0) connection->doOutput(); |
| } |
| assert(workQueue.empty() || workQueue.front().encodedSize() <= size); |
| if (!workQueue.empty() && workQueue.front().encodedSize() > size) |
| throw InternalErrorException(QPID_MSG("Frame too large for buffer.")); |
| { |
| Mutex::ScopedLock l(frameQueueLock); |
| buffered -= encoded; |
| // Put back any frames we did not encode. |
| frameQueue.insert(frameQueue.begin(), workQueue.begin(), workQueue.end()); |
| workQueue.clear(); |
| } |
| return out.getPosition(); |
| } |
| |
| void Connection::activateOutput() { output.activateOutput(); } |
| void Connection::giveReadCredit(int32_t credit) { output.giveReadCredit(credit); } |
| |
| void Connection::close() { |
| // Close the output queue. |
| Mutex::ScopedLock l(frameQueueLock); |
| frameQueueClosed = true; |
| } |
| |
| void Connection::closed() { |
| connection->closed(); |
| } |
| |
| void Connection::send(framing::AMQFrame& f) { |
| { |
| Mutex::ScopedLock l(frameQueueLock); |
| if (!frameQueueClosed) |
| frameQueue.push_back(f); |
| buffered += f.encodedSize(); |
| } |
| activateOutput(); |
| } |
| |
| framing::ProtocolVersion Connection::getVersion() const { |
| return framing::ProtocolVersion(0,10); |
| } |
| |
| size_t Connection::getBuffered() const { |
| Mutex::ScopedLock l(frameQueueLock); |
| return buffered; |
| } |
| |
| }} // namespace qpid::amqp_0_10 |