Package org.jgroups.util

Class MaxOneThreadPerSender

java.lang.Object

org.jgroups.util.SubmitToThreadPool

org.jgroups.util.MaxOneThreadPerSender

All Implemented Interfaces:

MessageProcessingPolicy

Direct Known Subclasses:

UnbatchOOBBatches

public class MaxOneThreadPerSender
extends SubmitToThreadPool

MessageProcessingPolicy which processes regular messages and message batches by assigning a max of 1 thread per message from the same sender. So if we have senders A, B, C and D, we'll have no more than 4 threads handling regular unicasts and 4 threads handling regular multicasts.

See JGRP-2143 for details.
When using virtual threads, we probably don't need this anymore, and can use a virtual thread to send messages / message batches directly up to UNICAST or NAKACK.

Since:

4.0

Author:

Bela Ban

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	MaxOneThreadPerSender.BatchHandlerLoop
protected class	MaxOneThreadPerSender.Entry
protected class	MaxOneThreadPerSender.MessageTable

Nested classes/interfaces inherited from class org.jgroups.util.SubmitToThreadPool

SubmitToThreadPool.BatchHandler, SubmitToThreadPool.SingleLoopbackHandler, SubmitToThreadPool.SingleMessageHandler, SubmitToThreadPool.SingleMessageHandlerWithClusterName

Field Summary

Fields

Modifier and Type	Field	Description
protected int	max_buffer_size
protected MaxOneThreadPerSender.MessageTable	mcasts
protected MaxOneThreadPerSender.MessageTable	ucasts

Fields inherited from class org.jgroups.util.SubmitToThreadPool

log, tp, tp_id

Constructor Summary

Constructors

Constructor	Description
MaxOneThreadPerSender()

Method Summary

Modifier and Type	Method	Description
void	destroy()	Called before the transport is stopped
java.lang.String	dump()
void	init(TP transport)	Called after creation.
boolean	loopback(Message msg, boolean oob)	Process a message that was not received from the transport but from above (e.g.
boolean	process(Message msg, boolean oob)	Process a message received from the transport
boolean	process(MessageBatch batch, boolean oob)	Process a batch received from the transport
void	reset()	To reset stats
void	viewChange(java.util.List<Address> members)

Methods inherited from class org.jgroups.util.SubmitToThreadPool

getTransport, removeAndDispatchNonBundledMessages

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mcasts

protected final MaxOneThreadPerSender.MessageTable mcasts

ucasts

protected final MaxOneThreadPerSender.MessageTable ucasts

max_buffer_size

protected int max_buffer_size

Constructor Detail

MaxOneThreadPerSender

public MaxOneThreadPerSender()

Method Detail

dump

public java.lang.String dump()

reset

public void reset()

Description copied from interface: MessageProcessingPolicy

To reset stats

init

public void init(TP transport)

Description copied from interface: MessageProcessingPolicy

Called after creation. Implementations may want to cache the transport reference to get access to thread pools, message counters etc

Specified by:

init in interface MessageProcessingPolicy

Overrides:

init in class SubmitToThreadPool

destroy

public void destroy()

Description copied from interface: MessageProcessingPolicy

Called before the transport is stopped

loopback

public boolean loopback(Message msg,
                        boolean oob)

Description copied from interface: MessageProcessingPolicy

Process a message that was not received from the transport but from above (e.g. the channel or a protocol), and needs to be looped back up because (1) the destination address is null (every multicast message is looped back) or (2) the destination address is the sender's address (unicast message to self).
A message that is looped back can bypass cluster name matching.

Specified by:

loopback in interface MessageProcessingPolicy

Overrides:

loopback in class SubmitToThreadPool

Parameters:

msg - the message to be looped back up the stack.

oob - true if the message is an OOB message

Returns:

process

public boolean process(Message msg,
                       boolean oob)

Description copied from interface: MessageProcessingPolicy

Process a message received from the transport

Specified by:

process in interface MessageProcessingPolicy

Overrides:

process in class SubmitToThreadPool

Parameters:

msg - the message

oob - true if the message is an OOB message

Returns:

process

public boolean process(MessageBatch batch,
                       boolean oob)

Description copied from interface: MessageProcessingPolicy

Process a batch received from the transport

Specified by:

process in interface MessageProcessingPolicy

Overrides:

process in class SubmitToThreadPool

Parameters:

batch - the batch

oob - true if the batch contains only OOB messages

Returns:

viewChange

public void viewChange(java.util.List<Address> members)