Package org.jgroups.protocols

Class REVERSE2

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.REVERSE2

All Implemented Interfaces:

Lifecycle

public class REVERSE2
extends Protocol

Since:

x.y

Author:

Bela Ban

Field Summary

Fields

Modifier and Type	Field	Description
protected java.util.function.Predicate<Message>	filter
protected java.util.Deque<Message>	queue

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
REVERSE2()

Method Summary

Modifier and Type	Method	Description
int	deliver()	Delivers queued messages
java.util.function.Predicate<Message>	filter()
REVERSE2	filter(java.util.function.Predicate<Message> f)
int	size()
java.lang.String	toString()
java.lang.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, 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, resetStats, setAddress, setDownProtocol, setErgonomics, setId, setLevel, setPolicies, setProtocolStack, setSocketFactory, setUpProtocol, setValue, start, statsEnabled, stop, up

Methods inherited from class java.lang.Object

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

Field Detail

filter

protected volatile java.util.function.Predicate<Message> filter

queue

protected final java.util.Deque<Message> queue

Constructor Detail

REVERSE2

public REVERSE2()

Method Detail

filter

public java.util.function.Predicate<Message> filter()

filter

public REVERSE2 filter(java.util.function.Predicate<Message> f)

size

public int size()

deliver

public int deliver()

Delivers queued messages

up

public java.lang.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

toString

public java.lang.String toString()

Overrides:

toString in class Protocol