diff options
Diffstat (limited to 'qpid/cpp/src/qpid/messaging/amqp/TcpTransport.cpp')
-rw-r--r-- | qpid/cpp/src/qpid/messaging/amqp/TcpTransport.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/messaging/amqp/TcpTransport.cpp b/qpid/cpp/src/qpid/messaging/amqp/TcpTransport.cpp new file mode 100644 index 0000000000..a919e974d6 --- /dev/null +++ b/qpid/cpp/src/qpid/messaging/amqp/TcpTransport.cpp @@ -0,0 +1,185 @@ +/* + * + * 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 "TcpTransport.h" +#include "ConnectionContext.h" +#include "qpid/messaging/ConnectionOptions.h" +#include "qpid/sys/AsynchIO.h" +#include "qpid/sys/ConnectionCodec.h" +#include "qpid/sys/Poller.h" +#include "qpid/log/Statement.h" +#include <boost/bind.hpp> +#include <boost/format.hpp> + +using namespace qpid::sys; + +namespace qpid { +namespace messaging { +namespace amqp { +// Static constructor which registers connector here +namespace { +Transport* create(TransportContext& c, Poller::shared_ptr p) +{ + return new TcpTransport(c, p); +} + +struct StaticInit +{ + StaticInit() + { + Transport::add("tcp", &create); + }; +} init; +} + +TcpTransport::TcpTransport(TransportContext& c, boost::shared_ptr<Poller> p) : socket(createSocket()), context(c), connector(0), aio(0), poller(p), closed(false) {} + +void TcpTransport::connect(const std::string& host, const std::string& port) +{ + assert(!connector); + assert(!aio); + context.getOptions()->configureSocket(*socket); + connector = AsynchConnector::create( + *socket, + host, port, + boost::bind(&TcpTransport::connected, this, _1), + boost::bind(&TcpTransport::failed, this, _3)); + + connector->start(poller); +} + +void TcpTransport::failed(const std::string& msg) +{ + QPID_LOG(debug, "Failed to connect: " << msg); + closed = true; + connector = 0; + socket->close(); + context.closed(); +} + +void TcpTransport::connected(const Socket&) +{ + context.opened(); + connector = 0; + aio = AsynchIO::create(*socket, + boost::bind(&TcpTransport::read, this, _1, _2), + boost::bind(&TcpTransport::eof, this, _1), + boost::bind(&TcpTransport::disconnected, this, _1), + boost::bind(&TcpTransport::socketClosed, this, _1, _2), + 0, // nobuffs + boost::bind(&TcpTransport::write, this, _1)); + aio->createBuffers(std::numeric_limits<uint16_t>::max());//note: AMQP 1.0 _can_ handle large frame sizes + id = boost::str(boost::format("[%1%]") % socket->getFullAddress()); + aio->start(poller); +} + +void TcpTransport::read(AsynchIO&, AsynchIO::BufferBase* buffer) +{ + int32_t decoded = context.getCodec().decode(buffer->bytes+buffer->dataStart, buffer->dataCount); + if (decoded < buffer->dataCount) { + // Adjust buffer for used bytes and then "unread them" + buffer->dataStart += decoded; + buffer->dataCount -= decoded; + aio->unread(buffer); + } else { + // Give whole buffer back to aio subsystem + aio->queueReadBuffer(buffer); + } +} + +void TcpTransport::write(AsynchIO&) +{ + if (context.getCodec().canEncode()) { + AsynchIO::BufferBase* buffer = aio->getQueuedBuffer(); + if (buffer) { + size_t encoded = context.getCodec().encode(buffer->bytes, buffer->byteCount); + + buffer->dataStart = 0; + buffer->dataCount = encoded; + aio->queueWrite(buffer); + } + } + +} + +void TcpTransport::close() +{ + qpid::sys::Mutex::ScopedLock l(lock); + if (!closed) { + QPID_LOG(debug, id << " TcpTransport closing..."); + if (aio) + aio->queueWriteClose(); + } +} + +void TcpTransport::eof(AsynchIO&) +{ + close(); +} + +void TcpTransport::disconnected(AsynchIO&) +{ + close(); + socketClosed(*aio, *socket); +} + +void TcpTransport::socketClosed(AsynchIO&, const Socket&) +{ + bool notify(false); + { + qpid::sys::Mutex::ScopedLock l(lock); + if (!closed) { + closed = true; + if (aio) + aio->queueForDeletion(); + QPID_LOG(debug, id << " Socket closed"); + notify = true; + } //else has already been closed + } + if (notify) context.closed(); +} + +void TcpTransport::abort() +{ + qpid::sys::Mutex::ScopedLock l(lock); + if (!closed) { + if (aio) { + // Established connection + aio->requestCallback(boost::bind(&TcpTransport::eof, this, _1)); + } else if (connector) { + // We're still connecting + connector->stop(); + failed("Connection timedout"); + } + } +} + +void TcpTransport::activateOutput() +{ + qpid::sys::Mutex::ScopedLock l(lock); + if (!closed && aio) aio->notifyPendingWrite(); +} + +const qpid::sys::SecuritySettings* TcpTransport::getSecuritySettings() +{ + return 0; +} + +}}} // namespace qpid::messaging::amqp |