Examples of QueueListEntry

org.activemq.service.QueueListEntry
Represents an entry in a linked list @version $Revision: 1.1.1.1 $
org.codehaus.activemq.service.QueueListEntry
Represents an entry in a linked list @version $Revision: 1.2 $

Examples of org.activemq.service.QueueListEntry

    }


    private TransientQueueSubscription findMatch(ConsumerInfo info) throws JMSException {
        TransientQueueSubscription result = null;
        synchronized(subscriptionMutex){
            QueueListEntry entry = subscriptions.getFirstEntry();
            while (entry != null) {
                TransientQueueSubscription ts = (TransientQueueSubscription) entry.getElement();
                if (ts.getConsumerInfo().equals(info)) {
                    result = ts;
                    break;
                }
                entry = subscriptions.getNextEntry(entry);

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Examples of org.activemq.service.QueueListEntry

     */
    private synchronized void doAdvisoryDispatchMessage(ActiveMQMessage message) {
        try {
            if (message != null && message.isAdvisory() && !message.isExpired()) {
                synchronized (subscriptionMutex) {
                    QueueListEntry entry = subscriptions.getFirstEntry();
                    while (entry != null) {
                        TransientQueueSubscription ts = (TransientQueueSubscription) entry.getElement();
                        if (ts.isTarget(message)) {
                            ts.doDispatch(message);
                            break;
                        }
                        entry = subscriptions.getNextEntry(entry);

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Examples of org.activemq.service.QueueListEntry

     * 
     * @throws JMSException
     */
    public void clear() throws JMSException {
        synchronized (lock) {
            QueueListEntry entry = messagePtrs.getFirstEntry();
            while (entry != null) {
                MessagePointer pointer = (MessagePointer) entry.getElement();
                pointer.clear();
                entry = messagePtrs.getNextEntry(entry);
            }
            messagePtrs.clear();
        }

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Examples of org.activemq.service.QueueListEntry

     * 
     * @throws JMSException
     */
    public void reset() throws JMSException {
        synchronized (lock) {
            QueueListEntry entry = messagePtrs.getFirstEntry();
            while (entry != null) {
                MessagePointer pointer = (MessagePointer) entry.getElement();
                if (pointer.isDispatched() && !pointer.isDeleted()) {
                    pointer.reset();
                    pointer.setRedelivered(true);
                }
                else {

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Examples of org.activemq.service.QueueListEntry

    public void messageConsumed(final MessageAck ack) throws JMSException {
        //remove up to this message
        int count = 0;
        boolean found = false;
        synchronized (lock) {
            QueueListEntry entry = messagePtrs.getFirstEntry();
            while (entry != null) {
                final MessagePointer pointer = (MessagePointer) entry.getElement();
                count++;
                // If in transaction: only consume the message acked.
                // If not in transaction: consume all previously delivered messages.
                if (!ack.isPartOfTransaction() || pointer.getMessageIdentity().equals(ack.getMessageIdentity())) {
                    if ((ack.isExpired() || ack.isMessageRead()) && !browser) {
                        pointer.delete(ack);//delete message from the container (if possible)
                    }
                    if (!ack.isMessageRead() && !browser) {
                        // It was a NACK.
                        pointer.reset();
                        pointer.setRedelivered(true);
                    }
                    else {
                        unconsumedMessagesDispatched.decrement();
                        // We may have to undo the delivery..
                        TransactionManager.getContexTransaction().addPostRollbackTask(new TransactionTask() {
                            public void execute() throws Throwable {
                                unconsumedMessagesDispatched.increment();
                                pointer.reset();
                                pointer.setRedelivered(true);
                                dispatch.wakeup(SubscriptionImpl.this);
                            }
                        });
                        final QueueListEntry theEntry = entry;
                        TransactionManager.getContexTransaction().addPostCommitTask(new TransactionTask() {
                            public void execute() throws Throwable {
                                messagePtrs.remove(theEntry);
                                if ((ack.isExpired() || ack.isMessageRead()) && !browser) {
                                    if (ack.isExpired() && !pointer.getContainer().isDeadLetterQueue()) {

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Examples of org.activemq.service.QueueListEntry

        if (usePrefetch) {
            return getMessagesWithPrefetch();
        }
        List tmpList = new ArrayList();
        synchronized (lock) {
            QueueListEntry entry = messagePtrs.getFirstEntry();
            while (entry != null) {
                MessagePointer pointer = (MessagePointer) entry.getElement();
                if (!pointer.isDispatched()) {
                    ActiveMQMessage msg = pointer.getContainer().getMessage(pointer.getMessageIdentity());
                    if (msg != null) {
                        if (pointer.isDispatched() || pointer.isRedelivered()) {
                            //already dispatched - so mark as redelivered
                            msg.setJMSRedelivered(true);
                            if (redeliveryPolicy.isBackOffMode()
                                    && msg.getDeliveryCount() < redeliveryPolicy.getMaximumRetryCount()) {
                                long sleepTime = redeliveryPolicy.getInitialRedeliveryTimeout();
                                sleepTime *= (msg.getDeliveryCount() * redeliveryPolicy.getBackOffIncreaseRate());
                                try {
                                    Thread.sleep(sleepTime);
                                }
                                catch (InterruptedException e) {
                                }
                            }
                            //incremenent delivery count
                            msg.incrementDeliveryCount();
                        }
                        if (!pointer.getContainer().isDeadLetterQueue()
                                && (msg.isExpired() || msg.getDeliveryCount() >= redeliveryPolicy
                                        .getMaximumRetryCount())) {
                            if (msg.isExpired()) {
                                log.warn("Message: " + msg + " has expired");
                            }
                            else {
                                log.warn("Message: " + msg + " exceeded retry count: " + msg.getDeliveryCount());
                            }
                            deadLetterPolicy.sendToDeadLetter(msg);
                            QueueListEntry discarded = entry;
                            entry = messagePtrs.getPrevEntry(discarded);
                            messagePtrs.remove(discarded);
                        }
                        else {
                            pointer.setDispatched(true);
                            msg.setDispatchedFromDLQ(pointer.getContainer().isDeadLetterQueue());
                            tmpList.add(msg);
                        }
                    }
                    else {
                        //the message is probably expired
                        log.info("Message probably expired: " + msg);
                        QueueListEntry discarded = entry;
                        entry = messagePtrs.getPrevEntry(discarded);
                        messagePtrs.remove(discarded);
                        if (msg != null) {
                            deadLetterPolicy.sendToDeadLetter(msg);
                        }

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Examples of org.activemq.service.QueueListEntry


    protected ActiveMQMessage[] getMessagesWithPrefetch() throws JMSException {
        
        List tmpList = new ArrayList();
        synchronized (lock) {
            QueueListEntry entry = messagePtrs.getFirstEntry();
            int count = 0;
            boolean fragmentedMessages = false;
            int maxNumberToDispatch = prefetchLimit - unconsumedMessagesDispatched.get();
            while (entry != null && (count < maxNumberToDispatch || fragmentedMessages)) {
                MessagePointer pointer = (MessagePointer) entry.getElement();
                if (!pointer.isDispatched()) {
                    ActiveMQMessage msg = pointer.getContainer().getMessage(pointer.getMessageIdentity());
                    if (msg != null && !msg.isExpired()) {
                        if (pointer.isDispatched() || pointer.isRedelivered()) {
                            //already dispatched - so mark as redelivered
                            msg.setJMSRedelivered(true);
                        }
                        pointer.setDispatched(true);
                        tmpList.add(msg);
                        fragmentedMessages = msg.isMessagePart() && !msg.isLastMessagePart();
                        unconsumedMessagesDispatched.increment();
                        count++;
                    }
                    else {
                        //the message is probably expired
                        log.info("Message probably expired: " + msg);
                        QueueListEntry discarded = entry;
                        entry = messagePtrs.getPrevEntry(discarded);
                        messagePtrs.remove(discarded);
                        if (msg != null) {
                            deadLetterPolicy.sendToDeadLetter(msg);
                        }

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Examples of org.activemq.service.QueueListEntry

     * @param id
     * @return
     */
    public MemoryManageable remove(Object id) {
        MemoryManageable result = null;
        QueueListEntry entry = internalList.getFirstEntry();
        try {
            while (entry != null) {
                MemoryManageable p = (MemoryManageable) entry.getElement();
                if (p.getMemoryId().equals(id)) {
                    result = p;
                    remove(p);
                    break;
                }

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Examples of org.codehaus.activemq.service.QueueListEntry

        return answer;
    }


    protected synchronized ActiveMQMessage[] getMessagesWithPrefetch() throws JMSException {
        List tmpList = new ArrayList();
        QueueListEntry entry = messagePtrs.getFirstEntry();
        int count = 0;
        int maxNumberToDispatch = prefetchLimit - unconsumedMessagesDispatched.get();
        while (entry != null && count < maxNumberToDispatch) {
            MessagePointer pointer = (MessagePointer) entry.getElement();
            if (!pointer.isDispatched()) {
                ActiveMQMessage msg = pointer.getContainer().getMessage(pointer.getMessageIdentity());
                if (msg != null) {
                    if (pointer.isDispatched() || pointer.isRedelivered()) {
                        //already dispatched - so mark as redelivered
                        msg.setJMSRedelivered(true);
                    }
                    pointer.setDispatched(true);
                    tmpList.add(msg);
                    unconsumedMessagesDispatched.increment();
                    count++;
                }
                else {
                    //the message is probably expired
                    log.info("Message probably expired: " + msg);
                    QueueListEntry discarded = entry;
                    entry = messagePtrs.getPrevEntry(discarded);
                    messagePtrs.remove(discarded);
                }
            }
            entry = messagePtrs.getNextEntry(entry);

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Examples of org.codehaus.activemq.service.QueueListEntry

     */
    protected synchronized void doMessageConsume(MessageAck ack, boolean remove) throws JMSException {
        //remove up to this message
        int count = 0;
        boolean found = false;
        QueueListEntry entry = messagePtrs.getFirstEntry();
        while (entry != null) {
            MessagePointer pointer = (MessagePointer) entry.getElement();
            if (remove) {
                messagePtrs.remove(entry);
                if (ack.isMessageRead() && !browser) {
                    pointer.delete(ack);//delete message from the container (if possible)
                }

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