diff options
Diffstat (limited to 'trunk/qpid/cpp/src/qpid/client/SessionImpl.cpp')
| -rw-r--r-- | trunk/qpid/cpp/src/qpid/client/SessionImpl.cpp | 817 |
1 files changed, 0 insertions, 817 deletions
diff --git a/trunk/qpid/cpp/src/qpid/client/SessionImpl.cpp b/trunk/qpid/cpp/src/qpid/client/SessionImpl.cpp deleted file mode 100644 index 0f767c9f2e..0000000000 --- a/trunk/qpid/cpp/src/qpid/client/SessionImpl.cpp +++ /dev/null @@ -1,817 +0,0 @@ -/* - * - * 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 "qpid/client/SessionImpl.h" - -#include "qpid/client/ConnectionImpl.h" -#include "qpid/client/Future.h" - -#include "qpid/framing/all_method_bodies.h" -#include "qpid/framing/ClientInvoker.h" -#include "qpid/framing/enum.h" -#include "qpid/framing/FrameSet.h" -#include "qpid/framing/AMQFrame.h" -#include "qpid/framing/MethodContent.h" -#include "qpid/framing/SequenceSet.h" -#include "qpid/framing/reply_exceptions.h" -#include "qpid/framing/DeliveryProperties.h" -#include "qpid/log/Statement.h" -#include "qpid/sys/IntegerTypes.h" - -#include <boost/bind.hpp> -#include <boost/shared_ptr.hpp> - -namespace { const std::string EMPTY; } - -namespace qpid { -namespace client { - -using namespace qpid::framing; -using namespace qpid::framing::session; //for detach codes - -typedef sys::Monitor::ScopedLock Lock; -typedef sys::Monitor::ScopedUnlock UnLock; -typedef sys::ScopedLock<sys::Semaphore> Acquire; - - -SessionImpl::SessionImpl(const std::string& name, boost::shared_ptr<ConnectionImpl> conn) - : state(INACTIVE), - detachedLifetime(0), - maxFrameSize(conn->getNegotiatedSettings().maxFrameSize), - id(conn->getNegotiatedSettings().username, name.empty() ? Uuid(true).str() : name), - connection(conn), - ioHandler(*this), - proxy(ioHandler), - nextIn(0), - nextOut(0), - sendMsgCredit(0), - doClearDeliveryPropertiesExchange(true), - autoDetach(true) -{ - channel.next = connection.get(); -} - -SessionImpl::~SessionImpl() { - { - Lock l(state); - if (state != DETACHED && state != DETACHING) { - QPID_LOG(warning, "Session was not closed cleanly: " << id); - try { - // Inform broker but don't wait for detached as that deadlocks. - // The detached will be ignored as the channel will be invalid. - if (autoDetach) detach(); - } catch (...) {} // ignore errors. - setState(DETACHED); - handleClosed(); - state.waitWaiters(); - } - delete sendMsgCredit; - } - connection->erase(channel); -} - - -FrameSet::shared_ptr SessionImpl::get() // user thread -{ - // No lock here: pop does a blocking wait. - return demux.getDefault()->pop(); -} - -const SessionId SessionImpl::getId() const //user thread -{ - return id; //id is immutable -} - -void SessionImpl::open(uint32_t timeout) // user thread -{ - Lock l(state); - if (state == INACTIVE) { - setState(ATTACHING); - proxy.attach(id.getName(), false); - waitFor(ATTACHED); - //TODO: timeout will not be set locally until get response to - //confirm, should we wait for that? - setTimeout(timeout); - proxy.commandPoint(nextOut, 0); - } else { - throw Exception("Open already called for this session"); - } -} - -void SessionImpl::close() //user thread -{ - Lock l(state); - // close() must be idempotent and no-throw as it will often be called in destructors. - if (state != DETACHED && state != DETACHING) { - try { - if (detachedLifetime) setTimeout(0); - detach(); - waitFor(DETACHED); - } catch (...) {} - setState(DETACHED); - } -} - -void SessionImpl::resume(boost::shared_ptr<ConnectionImpl>) // user thread -{ - throw NotImplementedException("Resume not yet implemented by client!"); -} - -void SessionImpl::suspend() //user thread -{ - Lock l(state); - detach(); -} - -void SessionImpl::detach() //call with lock held -{ - if (state == ATTACHED) { - setState(DETACHING); - proxy.detach(id.getName()); - } -} - - -uint16_t SessionImpl::getChannel() const // user thread -{ - return channel; -} - -void SessionImpl::setChannel(uint16_t c) // user thread -{ - //channel will only ever be set when session is detached (and - //about to be resumed) - channel = c; -} - -Demux& SessionImpl::getDemux() -{ - return demux; -} - -void SessionImpl::waitForCompletion(const SequenceNumber& id) -{ - Lock l(state); - waitForCompletionImpl(id); -} - -void SessionImpl::waitForCompletionImpl(const SequenceNumber& id) //call with lock held -{ - while (incompleteOut.contains(id)) { - checkOpen(); - state.wait(); - } -} - -bool SessionImpl::isComplete(const SequenceNumber& id) -{ - Lock l(state); - return !incompleteOut.contains(id); -} - -struct IsCompleteUpTo -{ - const SequenceNumber& id; - bool result; - - IsCompleteUpTo(const SequenceNumber& _id) : id(_id), result(true) {} - void operator()(const SequenceNumber& start, const SequenceNumber&) - { - if (start <= id) result = false; - } - -}; - -bool SessionImpl::isCompleteUpTo(const SequenceNumber& id) -{ - Lock l(state); - //return false if incompleteOut contains anything less than id, - //true otherwise - IsCompleteUpTo f(id); - incompleteIn.for_each(f); - return f.result; -} - -framing::SequenceNumber SessionImpl::getCompleteUpTo() -{ - SequenceNumber firstIncomplete; - { - Lock l(state); - firstIncomplete = incompleteIn.front(); - } - return --firstIncomplete; -} - -struct MarkCompleted -{ - const SequenceNumber& id; - SequenceSet& completedIn; - - MarkCompleted(const SequenceNumber& _id, SequenceSet& set) : id(_id), completedIn(set) {} - - void operator()(const SequenceNumber& start, const SequenceNumber& end) - { - if (id >= end) { - completedIn.add(start, end); - } else if (id >= start) { - completedIn.add(start, id); - } - } - -}; - -void SessionImpl::markCompleted(const SequenceSet& ids, bool notifyPeer) -{ - Lock l(state); - incompleteIn.remove(ids); - completedIn.add(ids); - if (notifyPeer) { - sendCompletion(); - } -} - -void SessionImpl::markCompleted(const SequenceNumber& id, bool cumulative, bool notifyPeer) -{ - Lock l(state); - if (cumulative) { - //everything in incompleteIn less than or equal to id is now complete - MarkCompleted f(id, completedIn); - incompleteIn.for_each(f); - //make sure id itself is in - completedIn.add(id); - //then remove anything thats completed from the incomplete set - incompleteIn.remove(completedIn); - } else if (incompleteIn.contains(id)) { - incompleteIn.remove(id); - completedIn.add(id); - } - if (notifyPeer) { - sendCompletion(); - } -} - -void SessionImpl::setException(const sys::ExceptionHolder& ex) { - Lock l(state); - setExceptionLH(ex); -} - -void SessionImpl::setExceptionLH(const sys::ExceptionHolder& ex) { // Call with lock held. - exceptionHolder = ex; - setState(DETACHED); -} - -/** - * Called by ConnectionImpl to notify active sessions when connection - * is explictly closed - */ -void SessionImpl::connectionClosed(uint16_t code, const std::string& text) { - setException(createConnectionException(code, text)); - handleClosed(); -} - -/** - * Called by ConnectionImpl to notify active sessions when connection - * is disconnected - */ -void SessionImpl::connectionBroke(const std::string& _text) { - setException(sys::ExceptionHolder(new TransportFailure(_text))); - handleClosed(); -} - -Future SessionImpl::send(const AMQBody& command) -{ - return sendCommand(command); -} - -Future SessionImpl::send(const AMQBody& command, const MethodContent& content) -{ - return sendCommand(command, &content); -} - -namespace { -// Functor for FrameSet::map to send header + content frames but, not method frames. -struct SendContentFn { - FrameHandler& handler; - void operator()(const AMQFrame& f) { - if (!f.getMethod()) - handler(const_cast<AMQFrame&>(f)); - } - SendContentFn(FrameHandler& h) : handler(h) {} -}; - -// Adaptor to make FrameSet look like MethodContent; used in cluster update client -struct MethodContentAdaptor : MethodContent -{ - AMQHeaderBody header; - const std::string content; - - MethodContentAdaptor(const FrameSet& f) : header(*f.getHeaders()), content(f.getContent()) {} - - AMQHeaderBody getHeader() const - { - return header; - } - const std::string& getData() const - { - return content; - } -}; - -} - -Future SessionImpl::send(const AMQBody& command, const FrameSet& content, bool reframe) { - Acquire a(sendLock); - SequenceNumber id = nextOut++; - { - Lock l(state); - checkOpen(); - incompleteOut.add(id); - } - Future f(id); - if (command.getMethod()->resultExpected()) { - Lock l(state); - //result listener must be set before the command is sent - f.setFutureResult(results.listenForResult(id)); - } - AMQFrame frame(command); - frame.setEof(false); - handleOut(frame); - - if (reframe) { - MethodContentAdaptor c(content); - sendContent(c); - } else { - SendContentFn send(out); - content.map(send); - } - return f; -} - -void SessionImpl::sendRawFrame(AMQFrame& frame) { - Acquire a(sendLock); - handleOut(frame); -} - -Future SessionImpl::sendCommand(const AMQBody& command, const MethodContent* content) -{ - // Only message transfers have content - if (content && sendMsgCredit) { - sendMsgCredit->acquire(); - } - Acquire a(sendLock); - SequenceNumber id = nextOut++; - { - Lock l(state); - checkOpen(); - incompleteOut.add(id); - } - Future f(id); - if (command.getMethod()->resultExpected()) { - Lock l(state); - //result listener must be set before the command is sent - f.setFutureResult(results.listenForResult(id)); - } - AMQFrame frame(command); - if (content) { - frame.setEof(false); - } - handleOut(frame); - if (content) { - sendContent(*content); - } - return f; -} - -void SessionImpl::sendContent(const MethodContent& content) -{ - AMQFrame header(content.getHeader()); - - // doClearDeliveryPropertiesExchange is set by cluster update client so - // it can send messages with delivery-properties.exchange set. - // - if (doClearDeliveryPropertiesExchange) { - // Normal client is not allowed to set the delivery-properties.exchange - // so clear it here. - AMQHeaderBody* headerp = static_cast<AMQHeaderBody*>(header.getBody()); - if (headerp && headerp->get<DeliveryProperties>()) - headerp->get<DeliveryProperties>(true)->clearExchangeFlag(); - } - header.setFirstSegment(false); - uint64_t data_length = content.getData().length(); - if(data_length > 0){ - header.setLastSegment(false); - handleOut(header); - /*Note: end of frame marker included in overhead but not in size*/ - const uint32_t frag_size = maxFrameSize - AMQFrame::frameOverhead(); - - if(data_length < frag_size){ - AMQFrame frame((AMQContentBody(content.getData()))); - frame.setFirstSegment(false); - handleOut(frame); - }else{ - uint32_t offset = 0; - uint32_t remaining = data_length - offset; - while (remaining > 0) { - uint32_t length = remaining > frag_size ? frag_size : remaining; - string frag(content.getData().substr(offset, length)); - AMQFrame frame((AMQContentBody(frag))); - frame.setFirstSegment(false); - frame.setLastSegment(true); - if (offset > 0) { - frame.setFirstFrame(false); - } - offset += length; - remaining = data_length - offset; - if (remaining) { - frame.setLastFrame(false); - } - handleOut(frame); - } - } - } else { - handleOut(header); - } -} - - -bool isMessageMethod(AMQMethodBody* method) -{ - return method->isA<MessageTransferBody>(); -} - -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); -} - -void SessionImpl::handleIn(AMQFrame& frame) // network thread -{ - try { - if (invoke(static_cast<SessionHandler&>(*this), *frame.getBody())) { - ; - } else if (invoke(static_cast<ExecutionHandler&>(*this), *frame.getBody())) { - //make sure the command id sequence and completion - //tracking takes account of execution commands - Lock l(state); - completedIn.add(nextIn++); - } else if (invoke(static_cast<MessageHandler&>(*this), *frame.getBody())) { - ; - } else { - //if not handled by this class, its for the application: - deliver(frame); - } - } - catch (const SessionException& e) { - setException(createSessionException(e.code, e.getMessage())); - } - catch (const ChannelException& e) { - setException(createChannelException(e.code, e.getMessage())); - } -} - -void SessionImpl::handleOut(AMQFrame& frame) // user thread -{ - sendFrame(frame, true); -} - -void SessionImpl::proxyOut(AMQFrame& frame) // network thread -{ - //Note: this case is treated slightly differently that command - //frames sent by application; session controls should not be - //blocked by bounds checking on the outgoing frame queue. - sendFrame(frame, false); -} - -void SessionImpl::sendFrame(AMQFrame& frame, bool canBlock) -{ - channel.handle(frame); - connection->expand(frame.encodedSize(), canBlock); -} - -void SessionImpl::deliver(AMQFrame& frame) // network thread -{ - if (!arriving) { - arriving = FrameSet::shared_ptr(new FrameSet(nextIn++)); - } - arriving->append(frame); - if (arriving->isComplete()) { - //message.transfers will be marked completed only when 'acked' - //as completion affects flow control; other commands will be - //considered completed as soon as processed here - if (arriving->isA<MessageTransferBody>()) { - Lock l(state); - incompleteIn.add(arriving->getId()); - } else { - Lock l(state); - completedIn.add(arriving->getId()); - } - demux.handle(arriving); - arriving.reset(); - } -} - -//control handler methods (called by network thread when controls are -//received from peer): - -void SessionImpl::attach(const std::string& /*name*/, bool /*force*/) -{ - throw NotImplementedException("Client does not support attach"); -} - -void SessionImpl::attached(const std::string& _name) -{ - Lock l(state); - if (id.getName() != _name) throw InternalErrorException("Incorrect session name"); - setState(ATTACHED); -} - -void SessionImpl::detach(const std::string& _name) -{ - Lock l(state); - if (id.getName() != _name) throw InternalErrorException("Incorrect session name"); - setState(DETACHED); - QPID_LOG(info, "Session detached by peer: " << id); - proxy.detached(_name, DETACH_CODE_NORMAL); -} - -void SessionImpl::detached(const std::string& _name, uint8_t _code) { - Lock l(state); - if (id.getName() != _name) throw InternalErrorException("Incorrect session name"); - setState(DETACHED); - if (_code) { - //TODO: make sure this works with execution.exception - don't - //want to overwrite the code from that - setExceptionLH(createChannelException(_code, "Session detached by peer")); - QPID_LOG(error, exceptionHolder.what()); - } - if (detachedLifetime == 0) { - handleClosed(); -} -} - -void SessionImpl::requestTimeout(uint32_t t) -{ - Lock l(state); - detachedLifetime = t; - proxy.timeout(t); -} - -void SessionImpl::timeout(uint32_t t) -{ - Lock l(state); - detachedLifetime = t; -} - -void SessionImpl::commandPoint(const framing::SequenceNumber& id, uint64_t offset) -{ - if (offset) throw NotImplementedException("Non-zero byte offset not yet supported for command-point"); - - Lock l(state); - nextIn = id; -} - -void SessionImpl::expected(const framing::SequenceSet& commands, const framing::Array& fragments) -{ - if (!commands.empty() || fragments.encodedSize()) { - throw NotImplementedException("Session resumption not yet supported"); - } -} - -void SessionImpl::confirmed(const framing::SequenceSet& /*commands*/, const framing::Array& /*fragments*/) -{ - //don't really care too much about this yet -} - -void SessionImpl::completed(const framing::SequenceSet& commands, bool timelyReply) -{ - Lock l(state); - incompleteOut.remove(commands); - state.notifyAll();//notify any waiters of completion - completedOut.add(commands); - //notify any waiting results of completion - results.completed(commands); - - if (timelyReply) { - proxy.knownCompleted(completedOut); - completedOut.clear(); - } -} - -void SessionImpl::knownCompleted(const framing::SequenceSet& commands) -{ - Lock l(state); - completedIn.remove(commands); -} - -void SessionImpl::flush(bool expected, bool confirmed, bool completed) -{ - Lock l(state); - if (expected) { - proxy.expected(SequenceSet(nextIn), Array()); - } - if (confirmed) { - proxy.confirmed(completedIn, Array()); - } - if (completed) { - proxy.completed(completedIn, true); - } -} - -void SessionImpl::sendCompletion() -{ - Lock l(state); - sendCompletionImpl(); -} - -void SessionImpl::sendFlush() -{ - Lock l(state); - proxy.flush(false, false, true); -} - -void SessionImpl::sendCompletionImpl() -{ - proxy.completed(completedIn, completedIn.span() > 1000); -} - -void SessionImpl::gap(const framing::SequenceSet& /*commands*/) -{ - throw NotImplementedException("gap not yet supported"); -} - -void SessionImpl::sync() {} - -void SessionImpl::result(const framing::SequenceNumber& commandId, const std::string& value) -{ - Lock l(state); - results.received(commandId, value); -} - -void SessionImpl::exception(uint16_t errorCode, - const framing::SequenceNumber& commandId, - uint8_t classCode, - uint8_t commandCode, - uint8_t /*fieldIndex*/, - const std::string& description, - const framing::FieldTable& /*errorInfo*/) -{ - Lock l(state); - setExceptionLH(createSessionException(errorCode, description)); - QPID_LOG(warning, "Exception received from broker: " << exceptionHolder.what() - << " [caused by " << commandId << " " << classCode << ":" << commandCode << "]"); - - if (detachedLifetime) - setTimeout(0); -} - -// Message methods: -void SessionImpl::accept(const qpid::framing::SequenceSet&) -{ -} - -void SessionImpl::reject(const qpid::framing::SequenceSet&, uint16_t, const std::string&) -{ -} - -void SessionImpl::release(const qpid::framing::SequenceSet&, bool) -{ -} - -MessageResumeResult SessionImpl::resume(const std::string&, const std::string&) -{ - throw NotImplementedException("resuming transfers not yet supported"); -} - -namespace { - const std::string QPID_SESSION_DEST = ""; - const uint8_t FLOW_MODE_CREDIT = 0; - const uint8_t CREDIT_MODE_MSG = 0; -} - -void SessionImpl::setFlowMode(const std::string& dest, uint8_t flowMode) -{ - if ( dest != QPID_SESSION_DEST ) { - QPID_LOG(warning, "Ignoring flow control for unknown destination: " << dest); - return; - } - - if ( flowMode != FLOW_MODE_CREDIT ) { - throw NotImplementedException("window flow control mode not supported by producer"); - } - Lock l(state); - sendMsgCredit = new sys::Semaphore(0); -} - -void SessionImpl::flow(const std::string& dest, uint8_t mode, uint32_t credit) -{ - if ( dest != QPID_SESSION_DEST ) { - QPID_LOG(warning, "Ignoring flow control for unknown destination: " << dest); - return; - } - - if ( mode != CREDIT_MODE_MSG ) { - return; - } - if (sendMsgCredit) { - sendMsgCredit->release(credit); - } -} - -void SessionImpl::stop(const std::string& dest) -{ - if ( dest != QPID_SESSION_DEST ) { - QPID_LOG(warning, "Ignoring flow control for unknown destination: " << dest); - return; - } - if (sendMsgCredit) { - sendMsgCredit->forceLock(); - } -} - -//private utility methods: - -inline void SessionImpl::setState(State s) //call with lock held -{ - state = s; -} - -inline void SessionImpl::waitFor(State s) //call with lock held -{ - // We can be DETACHED at any time - if (s == DETACHED) state.waitFor(DETACHED); - else state.waitFor(States(s, DETACHED)); - check(); -} - -void SessionImpl::check() const //call with lock held. -{ - exceptionHolder.raise(); -} - -void SessionImpl::checkOpen() const //call with lock held. -{ - check(); - if (state != ATTACHED) { - throw NotAttachedException(QPID_MSG("Session " << getId() << " isn't attached")); - } -} - -void SessionImpl::assertOpen() const -{ - Lock l(state); - checkOpen(); -} - -void SessionImpl::handleClosed() -{ - demux.close(exceptionHolder.empty() ? - sys::ExceptionHolder(new ClosedException()) : exceptionHolder); - results.close(); -} - -uint32_t SessionImpl::setTimeout(uint32_t seconds) { - proxy.requestTimeout(seconds); - // FIXME aconway 2008-10-07: wait for timeout response from broker - // and use value retured by broker. - detachedLifetime = seconds; - return detachedLifetime; -} - -uint32_t SessionImpl::getTimeout() const { - return detachedLifetime; -} - -boost::shared_ptr<ConnectionImpl> SessionImpl::getConnection() -{ - return connection; -} - -void SessionImpl::disableAutoDetach() { autoDetach = false; } - -}} |