Examples of org.jgroups.stack.AckSenderWindow$Entry

org.jgroups.stack.AckSenderWindow
Struct used to store message alongside with its seqno in the message queue




    /** Add the ACK to hashtable.sender.sent_msgs */
    private void handleAckReceived(Address sender, long seqno) {
        Entry           entry;
        AckSenderWindow win;


        if(log.isTraceEnabled())
            log.trace(new StringBuilder().append(local_addr).append(" <-- ACK(").append(sender).
                    append(": #").append(seqno).append(')'));
        synchronized(connections) {
            entry=connections.get(sender);
        }
        if(entry == null || entry.sent_msgs == null)
            return;
        win=entry.sent_msgs;
        win.ack(seqno); // removes message from retransmission
        num_acks_received++;
    }

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     * We need to resend our first message with our conn_id
     * @param sender
     */
    private void handleResendingOfFirstMessage(Address sender) {
        Entry entry;
        AckSenderWindow sender_win;
        Message rsp;
        if(log.isTraceEnabled())
            log.trace(local_addr + " <-- SEND_FIRST_SEQNO(" + sender + ")");


        synchronized(connections) {
            entry=connections.get(sender);
            sender_win=entry != null? entry.sent_msgs : null;
            if(sender_win == null) {
                if(log.isErrorEnabled())
                    log.error("sender window for " + sender + " not found");
                return;
            }
            rsp=sender_win.getLowestMessage();
        }
        if(rsp == null) {
            //if(log.isWarnEnabled())
                // log.warn("didn't find any messages in my sender window for " + sender);
            return;

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    private void handleAckReceived(Address sender, long seqno) {
        if(log.isTraceEnabled())
            log.trace(new StringBuilder().append(local_addr).append(" <-- ACK(").append(sender).
                    append(": #").append(seqno).append(')'));
        SenderEntry entry=send_table.get(sender);
        AckSenderWindow win=entry != null? entry.sent_msgs : null;
        if(win != null) {
            win.ack(seqno); // removes message from retransmission
            num_acks_received++;
        }
    }

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     */
    private void handleResendingOfFirstMessage(Address sender) {
        if(log.isTraceEnabled())
            log.trace(local_addr + " <-- SEND_FIRST_SEQNO(" + sender + ")");
        SenderEntry entry=send_table.get(sender);
        AckSenderWindow win=entry != null? entry.sent_msgs : null;
        if(win == null) {
            if(log.isErrorEnabled())
                log.error(local_addr + ": sender window for " + sender + " not found");
            return;
        }
        Message rsp=win.getLowestMessage();
        if(rsp == null)
            return;


        // We need to copy the UnicastHeader and put it back into the message because Message.copy() doesn't copy
        // the headers and therefore we'd modify the original message in the sender retransmission window

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        final Lock              lock=new ReentrantLock();


        public SenderEntry(long send_conn_id, AckSenderWindow.RetransmitCommand cmd, long[] timeout,
                           TimeScheduler timer, Address local_addr) {
            this.send_conn_id=send_conn_id;
            sent_msgs=new AckSenderWindow(cmd, new StaticInterval(timeout), timer, local_addr);
        }

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    protected void setUp() throws Exception {
        super.setUp();
        timer=new TimeScheduler(10);
        win=new AckSenderWindow(null, new StaticInterval(xmit_timeouts), timer);
    }

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     */
    public void testRetransmits() {
        Entry entry;
        int num_non_correct_entries=0;


        win=new AckSenderWindow(new MyRetransmitCommand(), new StaticInterval(xmit_timeouts), timer);


        // 1. Send NUM_MSGS messages:
        System.out.println("-- sending " + NUM_MSGS + " messages:");
        for(long i=0; i < NUM_MSGS; i++) {
            msgs.put(new Long(i), new Entry());

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                    try {
                        seqno=entry.sent_msgs_seqno;
                        UnicastHeader hdr=new UnicastHeader(UnicastHeader.DATA, seqno);
                        if(entry.sent_msgs == null) { // first msg to peer 'dst'
                            entry.sent_msgs=new AckSenderWindow(this, timeout, timer, this.local_addr); // use the protocol stack's timer
                        }
                        msg.putHeader(name, hdr);
                        if(log.isTraceEnabled())
                            log.trace(new StringBuffer().append(local_addr).append(" --> DATA(").append(dst).append(": #").
                                    append(seqno));

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    /** Add the ACK to hashtable.sender.sent_msgs */
    private void handleAckReceived(Object sender, long seqno) {
        Entry           entry;
        AckSenderWindow win;


        if(log.isTraceEnabled())
            log.trace(new StringBuffer().append(local_addr).append(" <-- ACK(").append(sender).
                      append(": #").append(seqno).append(')'));
        synchronized(connections) {
            entry=(Entry)connections.get(sender);
        }
        if(entry == null || entry.sent_msgs == null)
            return;
        win=entry.sent_msgs;
        win.ack(seqno); // removes message from retransmission
        num_acks_received++;
    }

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        if(timer == null)
            throw new Exception("TOTAL.start(): timer is null");


        reqTbl=new TreeMap();
        upTbl=new TreeMap();
        retransmitter=new AckSenderWindow(new Command(), AVG_RETRANSMIT_INTERVAL);
    }

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