How to use

getAdders

method

in

org.jgroups.util.Table

protected void processInternalMessage(final Table<Message> win, final Address sender) {
  // If there are other msgs, tell the regular thread pool to handle them (https://issues.jboss.org/browse/JGRP-1732)
  if(!win.isEmpty() && win.getAdders().get() == 0) // just a quick&dirty check, can also be incorrect
    getTransport().submitToThreadPool(() -> removeAndDeliver(win, sender), true);
}

protected void removeAndDeliver(Table<Message> win, Address sender) {
  AtomicInteger adders=win.getAdders();
  if(adders.getAndIncrement() != 0)
    return;
  final MessageBatch     batch=new MessageBatch(win.size()).dest(local_addr).sender(sender).multicast(false);
  Supplier<MessageBatch> batch_creator=() -> batch;
  do {
    try {
      batch.reset();
      win.removeMany(true, 0, null, batch_creator, BATCH_ACCUMULATOR);
    }
    catch(Throwable t) {
      log.error("failed removing messages from table for " + sender, t);
    }
    if(!batch.isEmpty()) {
      // batch is guaranteed to NOT contain any OOB messages as the drop_oob_msgs_filter removed them
      deliverBatch(batch);
    }
  }
  while(adders.decrementAndGet() != 0);
}

/** Efficient way of checking whether another thread is already processing messages from sender. If that's the case,
 *  we return immediately and let the existing thread process our message (https://jira.jboss.org/jira/browse/JGRP-829).
 *  Benefit: fewer threads blocked on the same lock, these threads can be returned to the thread pool
 */
protected void removeAndDeliver(Table<Message> buf, Address sender, boolean loopback, AsciiString cluster_name) {
  AtomicInteger adders=buf.getAdders();
  if(adders.getAndIncrement() != 0)
    return;
  boolean remove_msgs=discard_delivered_msgs && !loopback;
  MessageBatch batch=new MessageBatch(buf.size()).dest(null).sender(sender).clusterName(cluster_name).multicast(true);
  Supplier<MessageBatch> batch_creator=() -> batch;
  do {
    try {
      batch.reset();
      // Don't include DUMMY and OOB_DELIVERED messages in the removed set
      buf.removeMany(remove_msgs, 0, no_dummy_and_no_oob_delivered_msgs_and_no_dont_loopback_msgs,
              batch_creator, BATCH_ACCUMULATOR);
    }
    catch(Throwable t) {
      log.error("failed removing messages from table for " + sender, t);
    }
    if(!batch.isEmpty())
      deliverBatch(batch);
  }
  while(adders.decrementAndGet() != 0);
  if(rebroadcasting)
    checkForRebroadcasts();
}

AtomicInteger adders=win.getAdders();
if(adders.getAndIncrement() != 0)
  return;

protected void processInternalMessage(final Table<Message> win, final Address sender) {
  // If there are other msgs, tell the regular thread pool to handle them (https://issues.jboss.org/browse/JGRP-1732)
  if(!win.isEmpty() && win.getAdders().get() == 0) // just a quick&dirty check, can also be incorrect
    getTransport().submitToThreadPool(() -> removeAndDeliver(win, sender), true);
}

protected void removeAndDeliver(Table<Message> win, Address sender) {
  AtomicInteger adders=win.getAdders();
  if(adders.getAndIncrement() != 0)
    return;
  final MessageBatch     batch=new MessageBatch(win.size()).dest(local_addr).sender(sender).multicast(false);
  Supplier<MessageBatch> batch_creator=() -> batch;
  do {
    try {
      batch.reset();
      win.removeMany(true, 0, null, batch_creator, BATCH_ACCUMULATOR);
    }
    catch(Throwable t) {
      log.error("failed removing messages from table for " + sender, t);
    }
    if(!batch.isEmpty()) {
      // batch is guaranteed to NOT contain any OOB messages as the drop_oob_msgs_filter removed them
      deliverBatch(batch);
    }
  }
  while(adders.decrementAndGet() != 0);
}

/** Efficient way of checking whether another thread is already processing messages from sender. If that's the case,
 *  we return immediately and let the existing thread process our message (https://jira.jboss.org/jira/browse/JGRP-829).
 *  Benefit: fewer threads blocked on the same lock, these threads can be returned to the thread pool
 */
protected void removeAndDeliver(Table<Message> buf, Address sender, boolean loopback, AsciiString cluster_name) {
  AtomicInteger adders=buf.getAdders();
  if(adders.getAndIncrement() != 0)
    return;
  boolean remove_msgs=discard_delivered_msgs && !loopback;
  MessageBatch batch=new MessageBatch(buf.size()).dest(null).sender(sender).clusterName(cluster_name).multicast(true);
  Supplier<MessageBatch> batch_creator=() -> batch;
  do {
    try {
      batch.reset();
      // Don't include DUMMY and OOB_DELIVERED messages in the removed set
      buf.removeMany(remove_msgs, 0, no_dummy_and_no_oob_delivered_msgs_and_no_dont_loopback_msgs,
              batch_creator, BATCH_ACCUMULATOR);
    }
    catch(Throwable t) {
      log.error("failed removing messages from table for " + sender, t);
    }
    if(!batch.isEmpty())
      deliverBatch(batch);
  }
  while(adders.decrementAndGet() != 0);
  if(rebroadcasting)
    checkForRebroadcasts();
}

AtomicInteger adders=win.getAdders();
if(adders.getAndIncrement() != 0)
  return;