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Diffstat (limited to 'trunk/qpid/cpp/src/qpid/broker/Queue.cpp')
| -rw-r--r-- | trunk/qpid/cpp/src/qpid/broker/Queue.cpp | 1130 |
1 files changed, 0 insertions, 1130 deletions
diff --git a/trunk/qpid/cpp/src/qpid/broker/Queue.cpp b/trunk/qpid/cpp/src/qpid/broker/Queue.cpp deleted file mode 100644 index f4231f2397..0000000000 --- a/trunk/qpid/cpp/src/qpid/broker/Queue.cpp +++ /dev/null @@ -1,1130 +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/broker/Broker.h" -#include "qpid/broker/Queue.h" -#include "qpid/broker/QueueEvents.h" -#include "qpid/broker/Exchange.h" -#include "qpid/broker/DeliverableMessage.h" -#include "qpid/broker/MessageStore.h" -#include "qpid/broker/NullMessageStore.h" -#include "qpid/broker/QueueRegistry.h" - -#include "qpid/StringUtils.h" -#include "qpid/log/Statement.h" -#include "qpid/management/ManagementAgent.h" -#include "qpid/framing/reply_exceptions.h" -#include "qpid/framing/FieldTable.h" -#include "qpid/sys/Monitor.h" -#include "qpid/sys/Time.h" -#include "qmf/org/apache/qpid/broker/ArgsQueuePurge.h" - -#include <iostream> -#include <algorithm> -#include <functional> - -#include <boost/bind.hpp> -#include <boost/intrusive_ptr.hpp> - -using namespace qpid::broker; -using namespace qpid::sys; -using namespace qpid::framing; -using qpid::management::ManagementAgent; -using qpid::management::ManagementObject; -using qpid::management::Manageable; -using qpid::management::Args; -using std::for_each; -using std::mem_fun; -namespace _qmf = qmf::org::apache::qpid::broker; - - -namespace -{ -const std::string qpidMaxSize("qpid.max_size"); -const std::string qpidMaxCount("qpid.max_count"); -const std::string qpidNoLocal("no-local"); -const std::string qpidTraceIdentity("qpid.trace.id"); -const std::string qpidTraceExclude("qpid.trace.exclude"); -const std::string qpidLastValueQueue("qpid.last_value_queue"); -const std::string qpidLastValueQueueNoBrowse("qpid.last_value_queue_no_browse"); -const std::string qpidPersistLastNode("qpid.persist_last_node"); -const std::string qpidVQMatchProperty("qpid.LVQ_key"); -const std::string qpidQueueEventGeneration("qpid.queue_event_generation"); -//following feature is not ready for general use as it doesn't handle -//the case where a message is enqueued on more than one queue well enough: -const std::string qpidInsertSequenceNumbers("qpid.insert_sequence_numbers"); - -const int ENQUEUE_ONLY=1; -const int ENQUEUE_AND_DEQUEUE=2; -} - -Queue::Queue(const string& _name, bool _autodelete, - MessageStore* const _store, - const OwnershipToken* const _owner, - Manageable* parent, - Broker* b) : - - name(_name), - autodelete(_autodelete), - store(_store), - owner(_owner), - consumerCount(0), - exclusive(0), - noLocal(false), - lastValueQueue(false), - lastValueQueueNoBrowse(false), - persistLastNode(false), - inLastNodeFailure(false), - persistenceId(0), - policyExceeded(false), - mgmtObject(0), - eventMode(0), - eventMgr(0), - insertSeqNo(0), - broker(b) -{ - if (parent != 0 && broker != 0) - { - ManagementAgent* agent = broker->getManagementAgent(); - - if (agent != 0) - { - mgmtObject = new _qmf::Queue(agent, this, parent, _name, _store != 0, _autodelete, _owner != 0); - - // Add the object to the management agent only if this queue is not durable. - // If it's durable, we will add it later when the queue is assigned a persistenceId. - if (store == 0) { - agent->addObject (mgmtObject, agent->allocateId(this)); - } - } - } -} - -Queue::~Queue() -{ - if (mgmtObject != 0) - mgmtObject->resourceDestroy (); -} - -void Queue::notifyDurableIOComplete() -{ - QueueListeners::NotificationSet copy; - { - Mutex::ScopedLock locker(messageLock); - listeners.populate(copy); - } - copy.notify(); -} - -bool isLocalTo(const OwnershipToken* token, boost::intrusive_ptr<Message>& msg) -{ - return token && token->isLocal(msg->getPublisher()); -} - -bool Queue::isLocal(boost::intrusive_ptr<Message>& msg) -{ - //message is considered local if it was published on the same - //connection as that of the session which declared this queue - //exclusive (owner) or which has an exclusive subscription - //(exclusive) - return noLocal && (isLocalTo(owner, msg) || isLocalTo(exclusive, msg)); -} - -bool Queue::isExcluded(boost::intrusive_ptr<Message>& msg) -{ - return traceExclude.size() && msg->isExcluded(traceExclude); -} - -void Queue::deliver(boost::intrusive_ptr<Message>& msg){ - - if (msg->isImmediate() && getConsumerCount() == 0) { - if (alternateExchange) { - DeliverableMessage deliverable(msg); - alternateExchange->route(deliverable, msg->getRoutingKey(), msg->getApplicationHeaders()); - } - } else if (isLocal(msg)) { - //drop message - QPID_LOG(info, "Dropping 'local' message from " << getName()); - } else if (isExcluded(msg)) { - //drop message - QPID_LOG(info, "Dropping excluded message from " << getName()); - } else { - // if no store then mark as enqueued - if (!enqueue(0, msg)){ - push(msg); - msg->enqueueComplete(); - }else { - push(msg); - } - mgntEnqStats(msg); - QPID_LOG(debug, "Message " << msg << " enqueued on " << name << "[" << this << "]"); - } -} - -void Queue::recoverPrepared(boost::intrusive_ptr<Message>& msg) -{ - if (policy.get()) policy->recoverEnqueued(msg); -} - -void Queue::recover(boost::intrusive_ptr<Message>& msg){ - if (policy.get()) policy->recoverEnqueued(msg); - - push(msg, true); - if (store){ - // setup synclist for recovered messages, so they don't get re-stored on lastNodeFailure - msg->addToSyncList(shared_from_this(), store); - } - msg->enqueueComplete(); // mark the message as enqueued - mgntEnqStats(msg); - - if (store && !msg->isContentLoaded()) { - //content has not been loaded, need to ensure that lazy loading mode is set: - //TODO: find a nicer way to do this - msg->releaseContent(store); - } -} - -void Queue::process(boost::intrusive_ptr<Message>& msg){ - push(msg); - mgntEnqStats(msg); - if (mgmtObject != 0){ - mgmtObject->inc_msgTxnEnqueues (); - mgmtObject->inc_byteTxnEnqueues (msg->contentSize ()); - } -} - -void Queue::requeue(const QueuedMessage& msg){ - QueueListeners::NotificationSet copy; - { - Mutex::ScopedLock locker(messageLock); - if (!isEnqueued(msg)) return; - msg.payload->enqueueComplete(); // mark the message as enqueued - messages.insert(lower_bound(messages.begin(), messages.end(), msg), msg); - listeners.populate(copy); - - // for persistLastNode - don't force a message twice to disk, but force it if no force before - if(inLastNodeFailure && persistLastNode && !msg.payload->isStoredOnQueue(shared_from_this())) { - msg.payload->forcePersistent(); - if (msg.payload->isForcedPersistent() ){ - enqueue(0, msg.payload); - } - } - } - copy.notify(); -} - -void Queue::clearLVQIndex(const QueuedMessage& msg){ - const framing::FieldTable* ft = msg.payload ? msg.payload->getApplicationHeaders() : 0; - if (lastValueQueue && ft){ - string key = ft->getAsString(qpidVQMatchProperty); - lvq.erase(key); - } -} - -bool Queue::acquireMessageAt(const SequenceNumber& position, QueuedMessage& message) -{ - Mutex::ScopedLock locker(messageLock); - QPID_LOG(debug, "Attempting to acquire message at " << position); - - Messages::iterator i = findAt(position); - if (i != messages.end() ) { - message = *i; - if (lastValueQueue) { - clearLVQIndex(*i); - } - QPID_LOG(debug, - "Acquired message at " << i->position << " from " << name); - messages.erase(i); - return true; - } - QPID_LOG(debug, "Could not acquire message at " << position << " from " << name << "; no message at that position"); - return false; -} - -bool Queue::acquire(const QueuedMessage& msg) { - Mutex::ScopedLock locker(messageLock); - QPID_LOG(debug, "attempting to acquire " << msg.position); - Messages::iterator i = findAt(msg.position); - if ((i != messages.end() && !lastValueQueue) // note that in some cases payload not be set - || (lastValueQueue && (i->position == msg.position) && - msg.payload.get() == checkLvqReplace(*i).payload.get()) ) { - - clearLVQIndex(msg); - QPID_LOG(debug, - "Match found, acquire succeeded: " << - i->position << " == " << msg.position); - messages.erase(i); - return true; - } else { - QPID_LOG(debug, "No match: " << i->position << " != " << msg.position); - } - - QPID_LOG(debug, "Acquire failed for " << msg.position); - return false; -} - -void Queue::notifyListener() -{ - QueueListeners::NotificationSet set; - { - Mutex::ScopedLock locker(messageLock); - if (messages.size()) { - listeners.populate(set); - } - } - set.notify(); -} - -bool Queue::getNextMessage(QueuedMessage& m, Consumer::shared_ptr c) -{ - if (c->preAcquires()) { - switch (consumeNextMessage(m, c)) { - case CONSUMED: - return true; - case CANT_CONSUME: - notifyListener();//let someone else try - case NO_MESSAGES: - default: - return false; - } - } else { - return browseNextMessage(m, c); - } -} - -bool Queue::checkForMessages(Consumer::shared_ptr c) -{ - Mutex::ScopedLock locker(messageLock); - if (messages.empty()) { - //no message available, register consumer for notification - //when this changes - listeners.addListener(c); - return false; - } else { - QueuedMessage msg = getFront(); - if (store && !msg.payload->isEnqueueComplete()) { - //though a message is on the queue, it has not yet been - //enqueued and so is not available for consumption yet, - //register consumer for notification when this changes - listeners.addListener(c); - return false; - } else { - //check that consumer has sufficient credit for the - //message (if it does not, no need to register it for - //notification as the consumer itself will handle the - //credit allocation required to change this condition). - return c->accept(msg.payload); - } - } -} - -Queue::ConsumeCode Queue::consumeNextMessage(QueuedMessage& m, Consumer::shared_ptr c) -{ - while (true) { - Mutex::ScopedLock locker(messageLock); - if (messages.empty()) { - QPID_LOG(debug, "No messages to dispatch on queue '" << name << "'"); - listeners.addListener(c); - return NO_MESSAGES; - } else { - QueuedMessage msg = getFront(); - if (msg.payload->hasExpired()) { - QPID_LOG(debug, "Message expired from queue '" << name << "'"); - popAndDequeue(); - continue; - } - - if (c->filter(msg.payload)) { - if (c->accept(msg.payload)) { - m = msg; - popMsg(msg); - return CONSUMED; - } else { - //message(s) are available but consumer hasn't got enough credit - QPID_LOG(debug, "Consumer can't currently accept message from '" << name << "'"); - return CANT_CONSUME; - } - } else { - //consumer will never want this message - QPID_LOG(debug, "Consumer doesn't want message from '" << name << "'"); - return CANT_CONSUME; - } - } - } -} - - -bool Queue::browseNextMessage(QueuedMessage& m, Consumer::shared_ptr c) -{ - QueuedMessage msg(this); - while (seek(msg, c)) { - if (c->filter(msg.payload) && !msg.payload->hasExpired()) { - if (c->accept(msg.payload)) { - //consumer wants the message - c->position = msg.position; - m = msg; - if (!lastValueQueueNoBrowse) clearLVQIndex(msg); - if (lastValueQueue) { - boost::intrusive_ptr<Message> replacement = msg.payload->getReplacementMessage(this); - if (replacement.get()) m.payload = replacement; - } - return true; - } else { - //browser hasn't got enough credit for the message - QPID_LOG(debug, "Browser can't currently accept message from '" << name << "'"); - return false; - } - } else { - //consumer will never want this message, continue seeking - c->position = msg.position; - QPID_LOG(debug, "Browser skipping message from '" << name << "'"); - } - } - return false; -} - -void Queue::removeListener(Consumer::shared_ptr c) -{ - QueueListeners::NotificationSet set; - { - Mutex::ScopedLock locker(messageLock); - listeners.removeListener(c); - if (messages.size()) { - listeners.populate(set); - } - } - set.notify(); -} - -bool Queue::dispatch(Consumer::shared_ptr c) -{ - QueuedMessage msg(this); - if (getNextMessage(msg, c)) { - c->deliver(msg); - return true; - } else { - return false; - } -} - -// Find the next message -bool Queue::seek(QueuedMessage& msg, Consumer::shared_ptr c) { - Mutex::ScopedLock locker(messageLock); - if (!messages.empty() && messages.back().position > c->position) { - if (c->position < getFront().position) { - msg = getFront(); - return true; - } else { - Messages::iterator pos = findAt(c->position); - if (pos != messages.end() && pos+1 != messages.end()) { - msg = *(pos+1); - return true; - } - } - } - listeners.addListener(c); - return false; -} - -Queue::Messages::iterator Queue::findAt(SequenceNumber pos) { - - if(!messages.empty()){ - QueuedMessage compM; - compM.position = pos; - unsigned long diff = pos.getValue() - messages.front().position.getValue(); - long maxEnd = diff < messages.size()? diff : messages.size(); - - Messages::iterator i = lower_bound(messages.begin(),messages.begin()+maxEnd,compM); - if (i!= messages.end() && i->position == pos) - return i; - } - return messages.end(); // no match found. -} - - -QueuedMessage Queue::find(SequenceNumber pos) const { - - Mutex::ScopedLock locker(messageLock); - if(!messages.empty()){ - QueuedMessage compM; - compM.position = pos; - unsigned long diff = pos.getValue() - messages.front().position.getValue(); - long maxEnd = diff < messages.size()? diff : messages.size(); - - Messages::const_iterator i = lower_bound(messages.begin(),messages.begin()+maxEnd,compM); - if (i != messages.end()) - return *i; - } - return QueuedMessage(); -} - -void Queue::consume(Consumer::shared_ptr c, bool requestExclusive){ - Mutex::ScopedLock locker(consumerLock); - if(exclusive) { - throw ResourceLockedException( - QPID_MSG("Queue " << getName() << " has an exclusive consumer. No more consumers allowed.")); - } else if(requestExclusive) { - if(consumerCount) { - throw ResourceLockedException( - QPID_MSG("Queue " << getName() << " already has consumers. Exclusive access denied.")); - } else { - exclusive = c->getSession(); - } - } - consumerCount++; - if (mgmtObject != 0) - mgmtObject->inc_consumerCount (); -} - -void Queue::cancel(Consumer::shared_ptr c){ - removeListener(c); - Mutex::ScopedLock locker(consumerLock); - consumerCount--; - if(exclusive) exclusive = 0; - if (mgmtObject != 0) - mgmtObject->dec_consumerCount (); -} - -QueuedMessage Queue::get(){ - Mutex::ScopedLock locker(messageLock); - QueuedMessage msg(this); - - if(!messages.empty()){ - msg = getFront(); - popMsg(msg); - } - return msg; -} - -void Queue::purgeExpired() -{ - //As expired messages are discarded during dequeue also, only - //bother explicitly expiring if the rate of dequeues since last - //attempt is less than one per second. - if (dequeueTracker.sampleRatePerSecond() < 1) { - Messages expired; - { - Mutex::ScopedLock locker(messageLock); - for (Messages::iterator i = messages.begin(); i != messages.end();) { - if (lastValueQueue) checkLvqReplace(*i); - if (i->payload->hasExpired()) { - expired.push_back(*i); - i = messages.erase(i); - } else { - ++i; - } - } - } - for_each(expired.begin(), expired.end(), bind(&Queue::dequeue, this, (TransactionContext*) 0, _1)); - } -} - -/** - * purge - for purging all or some messages on a queue - * depending on the purge_request - * - * purge_request == 0 then purge all messages - * == N then purge N messages from queue - * Sometimes purge_request == 1 to unblock the top of queue - */ -uint32_t Queue::purge(const uint32_t purge_request){ - Mutex::ScopedLock locker(messageLock); - uint32_t purge_count = purge_request; // only comes into play if >0 - - uint32_t count = 0; - // Either purge them all or just the some (purge_count) while the queue isn't empty. - while((!purge_request || purge_count--) && !messages.empty()) { - popAndDequeue(); - count++; - } - return count; -} - -uint32_t Queue::move(const Queue::shared_ptr destq, uint32_t qty) { - Mutex::ScopedLock locker(messageLock); - uint32_t move_count = qty; // only comes into play if qty >0 - uint32_t count = 0; // count how many were moved for returning - - while((!qty || move_count--) && !messages.empty()) { - QueuedMessage qmsg = getFront(); - boost::intrusive_ptr<Message> msg = qmsg.payload; - destq->deliver(msg); // deliver message to the destination queue - popMsg(qmsg); - dequeue(0, qmsg); - count++; - } - return count; -} - -void Queue::popMsg(QueuedMessage& qmsg) -{ - const framing::FieldTable* ft = qmsg.payload->getApplicationHeaders(); - if (lastValueQueue && ft){ - string key = ft->getAsString(qpidVQMatchProperty); - lvq.erase(key); - } - messages.pop_front(); - ++dequeueTracker; -} - -void Queue::push(boost::intrusive_ptr<Message>& msg, bool isRecovery){ - QueueListeners::NotificationSet copy; - { - Mutex::ScopedLock locker(messageLock); - QueuedMessage qm(this, msg, ++sequence); - if (insertSeqNo) msg->getOrInsertHeaders().setInt64(seqNoKey, sequence); - - LVQ::iterator i; - const framing::FieldTable* ft = msg->getApplicationHeaders(); - if (lastValueQueue && ft){ - string key = ft->getAsString(qpidVQMatchProperty); - - i = lvq.find(key); - if (i == lvq.end() || (broker && broker->isClusterUpdatee())) { - messages.push_back(qm); - listeners.populate(copy); - lvq[key] = msg; - }else { - boost::intrusive_ptr<Message> old = i->second->getReplacementMessage(this); - if (!old) old = i->second; - i->second->setReplacementMessage(msg,this); - if (isRecovery) { - //can't issue new requests for the store until - //recovery is complete - pendingDequeues.push_back(QueuedMessage(qm.queue, old, qm.position)); - } else { - Mutex::ScopedUnlock u(messageLock); - dequeue(0, QueuedMessage(qm.queue, old, qm.position)); - } - } - }else { - messages.push_back(qm); - listeners.populate(copy); - } - if (eventMode) { - if (eventMgr) eventMgr->enqueued(qm); - else QPID_LOG(warning, "Enqueue manager not set, events not generated for " << getName()); - } - if (policy.get()) { - policy->enqueued(qm); - } - } - copy.notify(); -} - -QueuedMessage Queue::getFront() -{ - QueuedMessage msg = messages.front(); - if (lastValueQueue) { - boost::intrusive_ptr<Message> replacement = msg.payload->getReplacementMessage(this); - if (replacement.get()) msg.payload = replacement; - } - return msg; -} - -QueuedMessage& Queue::checkLvqReplace(QueuedMessage& msg) -{ - boost::intrusive_ptr<Message> replacement = msg.payload->getReplacementMessage(this); - if (replacement.get()) { - const framing::FieldTable* ft = replacement->getApplicationHeaders(); - if (ft) { - string key = ft->getAsString(qpidVQMatchProperty); - if (lvq.find(key) != lvq.end()){ - lvq[key] = replacement; - } - } - msg.payload = replacement; - } - return msg; -} - -/** function only provided for unit tests, or code not in critical message path */ -uint32_t Queue::getEnqueueCompleteMessageCount() const -{ - Mutex::ScopedLock locker(messageLock); - uint32_t count = 0; - for ( Messages::const_iterator i = messages.begin(); i != messages.end(); ++i ) { - //NOTE: don't need to use checkLvqReplace() here as it - //is only relevant for LVQ which does not support persistence - //so the enqueueComplete check has no effect - if ( i->payload->isEnqueueComplete() ) count ++; - } - - return count; -} - -uint32_t Queue::getMessageCount() const -{ - Mutex::ScopedLock locker(messageLock); - return messages.size(); -} - -uint32_t Queue::getConsumerCount() const -{ - Mutex::ScopedLock locker(consumerLock); - return consumerCount; -} - -bool Queue::canAutoDelete() const -{ - Mutex::ScopedLock locker(consumerLock); - return autodelete && !consumerCount; -} - -void Queue::clearLastNodeFailure() -{ - inLastNodeFailure = false; -} - -void Queue::setLastNodeFailure() -{ - if (persistLastNode){ - Mutex::ScopedLock locker(messageLock); - try { - for ( Messages::iterator i = messages.begin(); i != messages.end(); ++i ) { - if (lastValueQueue) checkLvqReplace(*i); - // don't force a message twice to disk. - if(!i->payload->isStoredOnQueue(shared_from_this())) { - i->payload->forcePersistent(); - if (i->payload->isForcedPersistent() ){ - enqueue(0, i->payload); - } - } - } - } catch (const std::exception& e) { - // Could not go into last node standing (for example journal not large enough) - QPID_LOG(error, "Unable to fail to last node standing for queue: " << name << " : " << e.what()); - } - inLastNodeFailure = true; - } -} - -// return true if store exists, -bool Queue::enqueue(TransactionContext* ctxt, boost::intrusive_ptr<Message> msg, bool suppressPolicyCheck) -{ - if (policy.get() && !suppressPolicyCheck) { - Messages dequeues; - { - Mutex::ScopedLock locker(messageLock); - policy->tryEnqueue(msg); - policy->getPendingDequeues(dequeues); - } - //depending on policy, may have some dequeues that need to performed without holding the lock - for_each(dequeues.begin(), dequeues.end(), boost::bind(&Queue::dequeue, this, (TransactionContext*) 0, _1)); - } - - if (inLastNodeFailure && persistLastNode){ - msg->forcePersistent(); - } - - if (traceId.size()) { - msg->addTraceId(traceId); - } - - if ((msg->isPersistent() || msg->checkContentReleasable()) && store) { - msg->enqueueAsync(shared_from_this(), store); //increment to async counter -- for message sent to more than one queue - boost::intrusive_ptr<PersistableMessage> pmsg = boost::static_pointer_cast<PersistableMessage>(msg); - store->enqueue(ctxt, pmsg, *this); - return true; - } - if (!store) { - //Messages enqueued on a transient queue should be prevented - //from having their content released as it may not be - //recoverable by these queue for delivery - msg->blockContentRelease(); - } - return false; -} - -void Queue::enqueueAborted(boost::intrusive_ptr<Message> msg) -{ - Mutex::ScopedLock locker(messageLock); - if (policy.get()) policy->enqueueAborted(msg); -} - -// return true if store exists, -bool Queue::dequeue(TransactionContext* ctxt, const QueuedMessage& msg) -{ - { - Mutex::ScopedLock locker(messageLock); - if (!isEnqueued(msg)) return false; - if (!ctxt) { - dequeued(msg); - } - } - if ((msg.payload->isPersistent() || msg.payload->checkContentReleasable()) && store) { - msg.payload->dequeueAsync(shared_from_this(), store); //increment to async counter -- for message sent to more than one queue - boost::intrusive_ptr<PersistableMessage> pmsg = boost::static_pointer_cast<PersistableMessage>(msg.payload); - store->dequeue(ctxt, pmsg, *this); - return true; - } - return false; -} - -void Queue::dequeueCommitted(const QueuedMessage& msg) -{ - Mutex::ScopedLock locker(messageLock); - dequeued(msg); - if (mgmtObject != 0) { - mgmtObject->inc_msgTxnDequeues(); - mgmtObject->inc_byteTxnDequeues(msg.payload->contentSize()); - } -} - -/** - * Removes a message from the in-memory delivery queue as well - * dequeing it from the logical (and persistent if applicable) queue - */ -void Queue::popAndDequeue() -{ - QueuedMessage msg = getFront(); - popMsg(msg); - dequeue(0, msg); -} - -/** - * Updates policy and management when a message has been dequeued, - * expects messageLock to be held - */ -void Queue::dequeued(const QueuedMessage& msg) -{ - if (policy.get()) policy->dequeued(msg); - mgntDeqStats(msg.payload); - if (eventMode == ENQUEUE_AND_DEQUEUE && eventMgr) { - eventMgr->dequeued(msg); - } -} - - -void Queue::create(const FieldTable& _settings) -{ - settings = _settings; - if (store) { - store->create(*this, _settings); - } - configure(_settings); -} - -void Queue::configure(const FieldTable& _settings, bool recovering) -{ - - eventMode = _settings.getAsInt(qpidQueueEventGeneration); - - if (QueuePolicy::getType(_settings) == QueuePolicy::FLOW_TO_DISK && - (!store || NullMessageStore::isNullStore(store) || (eventMode && eventMgr && !eventMgr->isSync()) )) { - if ( NullMessageStore::isNullStore(store)) { - QPID_LOG(warning, "Flow to disk not valid for non-persisted queue:" << getName()); - } else if (eventMgr && !eventMgr->isSync() ) { - QPID_LOG(warning, "Flow to disk not valid with async Queue Events:" << getName()); - } - FieldTable copy(_settings); - copy.erase(QueuePolicy::typeKey); - setPolicy(QueuePolicy::createQueuePolicy(getName(), copy)); - } else { - setPolicy(QueuePolicy::createQueuePolicy(getName(), _settings)); - } - //set this regardless of owner to allow use of no-local with exclusive consumers also - noLocal = _settings.get(qpidNoLocal); - QPID_LOG(debug, "Configured queue " << getName() << " with no-local=" << noLocal); - - lastValueQueue= _settings.get(qpidLastValueQueue); - if (lastValueQueue) QPID_LOG(debug, "Configured queue as Last Value Queue for: " << getName()); - - lastValueQueueNoBrowse = _settings.get(qpidLastValueQueueNoBrowse); - if (lastValueQueueNoBrowse){ - QPID_LOG(debug, "Configured queue as Last Value Queue No Browse for: " << getName()); - lastValueQueue = lastValueQueueNoBrowse; - } - - persistLastNode= _settings.get(qpidPersistLastNode); - if (persistLastNode) QPID_LOG(debug, "Configured queue to Persist data if cluster fails to one node for: " << getName()); - - traceId = _settings.getAsString(qpidTraceIdentity); - std::string excludeList = _settings.getAsString(qpidTraceExclude); - if (excludeList.size()) { - split(traceExclude, excludeList, ", "); - } - QPID_LOG(debug, "Configured queue " << getName() << " with qpid.trace.id='" << traceId - << "' and qpid.trace.exclude='"<< excludeList << "' i.e. " << traceExclude.size() << " elements"); - - FieldTable::ValuePtr p =_settings.get(qpidInsertSequenceNumbers); - if (p && p->convertsTo<std::string>()) insertSequenceNumbers(p->get<std::string>()); - - if (mgmtObject != 0) - mgmtObject->set_arguments (_settings); - - if ( isDurable() && ! getPersistenceId() && ! recovering ) - store->create(*this, _settings); -} - -void Queue::destroy() -{ - if (alternateExchange.get()) { - Mutex::ScopedLock locker(messageLock); - while(!messages.empty()){ - DeliverableMessage msg(getFront().payload); - alternateExchange->route(msg, msg.getMessage().getRoutingKey(), - msg.getMessage().getApplicationHeaders()); - popAndDequeue(); - } - alternateExchange->decAlternateUsers(); - } - - if (store) { - store->flush(*this); - store->destroy(*this); - store = 0;//ensure we make no more calls to the store for this queue - } -} - -void Queue::bound(const string& exchange, const string& key, - const FieldTable& args) -{ - bindings.add(exchange, key, args); -} - -void Queue::unbind(ExchangeRegistry& exchanges, Queue::shared_ptr shared_ref) -{ - bindings.unbind(exchanges, shared_ref); -} - -void Queue::setPolicy(std::auto_ptr<QueuePolicy> _policy) -{ - policy = _policy; -} - -const QueuePolicy* Queue::getPolicy() -{ - return policy.get(); -} - -uint64_t Queue::getPersistenceId() const -{ - return persistenceId; -} - -void Queue::setPersistenceId(uint64_t _persistenceId) const -{ - if (mgmtObject != 0 && persistenceId == 0) - { - ManagementAgent* agent = broker->getManagementAgent(); - agent->addObject (mgmtObject, 0x3000000000000000LL + _persistenceId); - - if (externalQueueStore) { - ManagementObject* childObj = externalQueueStore->GetManagementObject(); - if (childObj != 0) - childObj->setReference(mgmtObject->getObjectId()); - } - } - persistenceId = _persistenceId; -} - -void Queue::encode(Buffer& buffer) const -{ - buffer.putShortString(name); - buffer.put(settings); - if (policy.get()) { - buffer.put(*policy); - } - buffer.putShortString(alternateExchange.get() ? alternateExchange->getName() : std::string("")); -} - -uint32_t Queue::encodedSize() const -{ - return name.size() + 1/*short string size octet*/ - + (alternateExchange.get() ? alternateExchange->getName().size() : 0) + 1 /* short string */ - + settings.encodedSize() - + (policy.get() ? (*policy).encodedSize() : 0); -} - -Queue::shared_ptr Queue::decode ( QueueRegistry& queues, Buffer& buffer, bool recovering ) -{ - string name; - buffer.getShortString(name); - std::pair<Queue::shared_ptr, bool> result = queues.declare(name, true); - buffer.get(result.first->settings); - result.first->configure(result.first->settings, recovering ); - if (result.first->policy.get() && buffer.available() >= result.first->policy->encodedSize()) { - buffer.get ( *(result.first->policy) ); - } - if (buffer.available()) { - string altExch; - buffer.getShortString(altExch); - result.first->alternateExchangeName.assign(altExch); - } - - return result.first; -} - - -void Queue::setAlternateExchange(boost::shared_ptr<Exchange> exchange) -{ - alternateExchange = exchange; - if (mgmtObject) { - if (exchange.get() != 0) - mgmtObject->set_altExchange(exchange->GetManagementObject()->getObjectId()); - else - mgmtObject->clr_altExchange(); - } -} - -boost::shared_ptr<Exchange> Queue::getAlternateExchange() -{ - return alternateExchange; -} - -void Queue::tryAutoDelete(Broker& broker, Queue::shared_ptr queue) -{ - if (broker.getQueues().destroyIf(queue->getName(), - boost::bind(boost::mem_fn(&Queue::canAutoDelete), queue))) { - queue->unbind(broker.getExchanges(), queue); - queue->destroy(); - } -} - -bool Queue::isExclusiveOwner(const OwnershipToken* const o) const -{ - Mutex::ScopedLock locker(ownershipLock); - return o == owner; -} - -void Queue::releaseExclusiveOwnership() -{ - Mutex::ScopedLock locker(ownershipLock); - owner = 0; -} - -bool Queue::setExclusiveOwner(const OwnershipToken* const o) -{ - Mutex::ScopedLock locker(ownershipLock); - if (owner) { - return false; - } else { - owner = o; - return true; - } -} - -bool Queue::hasExclusiveOwner() const -{ - Mutex::ScopedLock locker(ownershipLock); - return owner != 0; -} - -bool Queue::hasExclusiveConsumer() const -{ - return exclusive; -} - -void Queue::setExternalQueueStore(ExternalQueueStore* inst) { - if (externalQueueStore!=inst && externalQueueStore) - delete externalQueueStore; - externalQueueStore = inst; - - if (inst) { - ManagementObject* childObj = inst->GetManagementObject(); - if (childObj != 0 && mgmtObject != 0) - childObj->setReference(mgmtObject->getObjectId()); - } -} - -ManagementObject* Queue::GetManagementObject (void) const -{ - return (ManagementObject*) mgmtObject; -} - -Manageable::status_t Queue::ManagementMethod (uint32_t methodId, Args& args, string&) -{ - Manageable::status_t status = Manageable::STATUS_UNKNOWN_METHOD; - - QPID_LOG (debug, "Queue::ManagementMethod [id=" << methodId << "]"); - - switch (methodId) - { - case _qmf::Queue::METHOD_PURGE : - _qmf::ArgsQueuePurge& iargs = (_qmf::ArgsQueuePurge&) args; - purge (iargs.i_request); - status = Manageable::STATUS_OK; - break; - } - - return status; -} - -void Queue::setPosition(SequenceNumber n) { - Mutex::ScopedLock locker(messageLock); - sequence = n; -} - -SequenceNumber Queue::getPosition() { - return sequence; -} - -int Queue::getEventMode() { return eventMode; } - -void Queue::setQueueEventManager(QueueEvents& mgr) -{ - eventMgr = &mgr; -} - -void Queue::recoveryComplete(ExchangeRegistry& exchanges) -{ - // set the alternate exchange - if (!alternateExchangeName.empty()) { - try { - Exchange::shared_ptr ae = exchanges.get(alternateExchangeName); - setAlternateExchange(ae); - } catch (const NotFoundException&) { - QPID_LOG(warning, "Could not set alternate exchange \"" << alternateExchangeName << "\" on queue \"" << name << "\": exchange does not exist."); - } - } - //process any pending dequeues - for_each(pendingDequeues.begin(), pendingDequeues.end(), boost::bind(&Queue::dequeue, this, (TransactionContext*) 0, _1)); - pendingDequeues.clear(); -} - -void Queue::insertSequenceNumbers(const std::string& key) -{ - seqNoKey = key; - insertSeqNo = !seqNoKey.empty(); - QPID_LOG(debug, "Inserting sequence numbers as " << key); -} - -void Queue::enqueued(const QueuedMessage& m) -{ - if (m.payload) { - if (policy.get()) { - policy->recoverEnqueued(m.payload); - policy->enqueued(m); - } - mgntEnqStats(m.payload); - enqueue ( 0, m.payload, true ); - } else { - QPID_LOG(warning, "Queue informed of enqueued message that has no payload"); - } -} - -bool Queue::isEnqueued(const QueuedMessage& msg) -{ - return !policy.get() || policy->isEnqueued(msg); -} - -QueueListeners& Queue::getListeners() { return listeners; } |