Package org.jgroups.protocols

Class THREAD_COUNT

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.THREAD_COUNT

All Implemented Interfaces:

Lifecycle

public class THREAD_COUNT
extends Protocol

Maintains averages of up- and down-threads

Since:

5.2.13

Field Summary

Fields

Modifier and Type	Field	Description
protected final AverageMinMax	avg_down
protected final AverageMinMax	avg_up
protected final AtomicInteger	down_count
protected boolean	down_threads
protected final AtomicInteger	up_count
protected boolean	up_threads

Fields inherited from class org.jgroups.stack.Protocol

after_creation_hook, down_prot, ergonomics, id, local_addr, log, policies, stack, stats, up_prot

Constructor Summary

Constructors

Constructor	Description
THREAD_COUNT()

Method Summary

Modifier and Type	Method	Description
Object	down(Message msg)	A message is sent down the stack.
void	resetStats()
Object	up(Message msg)	A single message was received.
void	up(MessageBatch batch)	Sends up a multiple messages in a MessageBatch.

Methods inherited from class org.jgroups.stack.Protocol

accept, addPolicy, addr, addr, afterCreationHook, destroy, down, down, enableStats, getAddress, getComponents, getDownProtocol, getDownServices, getId, getIdsAbove, getLevel, getLog, getName, getPolicies, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getUpServices, getValue, init, isErgonomics, level, parse, policies, providedDownServices, providedUpServices, removePolicy, requiredDownServices, requiredUpServices, resetStatistics, setAddress, setDownProtocol, setErgonomics, setId, setLevel, setPolicies, setProtocolStack, setSocketFactory, setUpProtocol, setValue, start, statsEnabled, stop, toString, up

Methods inherited from class java.lang.Object

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

Field Details

up_threads

protected boolean up_threads

down_threads

protected boolean down_threads

avg_up

protected final AverageMinMax avg_up

avg_down

protected final AverageMinMax avg_down

up_count

protected final AtomicInteger up_count

down_count

protected final AtomicInteger down_count

Constructor Details

THREAD_COUNT

public THREAD_COUNT()

Method Details

down

public Object down(Message msg)

Description copied from class: Protocol

A message is sent down the stack. Protocols may examine the message and do something (e.g. add a header) with it, before passing it down.

Overrides:

down in class Protocol

up

public Object up(Message msg)

Description copied from class: Protocol

A single message was received. Protocols may examine the message and do something (e.g. add a header) with it before passing it up.

Overrides:

up in class Protocol

up

public void up(MessageBatch batch)

Description copied from class: Protocol

Sends up a multiple messages in a MessageBatch. The sender of the batch is always the same, and so is the destination (null == multicast messages). Messages in a batch can be OOB messages, regular messages, or mixed messages, although the transport itself will create initial MessageBatches that contain only either OOB or regular messages.

The default processing below sends messages up the stack individually, based on a matching criteria (calling Protocol.accept(Message)), and - if true - calls Protocol.up(org.jgroups.Event) for that message and removes the message. If the batch is not empty, it is passed up, or else it is dropped.

Subclasses should check if there are any messages destined for them (e.g. using MessageBatch.iterator(Predicate)), then possibly remove and process them and finally pass the batch up to the next protocol. Protocols can also modify messages in place, e.g. ENCRYPT could decrypt all encrypted messages in the batch, not remove them, and pass the batch up when done.

Overrides:

up in class Protocol

Parameters:

batch - The message batch

resetStats

public void resetStats()

Overrides:

resetStats in class Protocol