java.lang.Object
- org.jgroups.stack.Protocol
- - org.jgroups.protocols.DUPL

All Implemented Interfaces:

Lifecycle
```
public class DUPL
extends Protocol
```
Duplicates outgoing or incoming messages by copying them

Author:

Bela Ban

Nested Class Summary

Nested Classes
Modifier and Type Class Description

protected static class DUPL.Direction

Field Summary

Fields
Modifier and Type	Field	Description
`protected boolean`	`copy_multicast_msgs`
`protected boolean`	`copy_unicast_msgs`
`protected int`	`incoming_copies`
`protected int`	`outgoing_copies`

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

DUPL()

DUPL(boolean copy_multicast_msgs, boolean copy_unicast_msgs, int incoming_copies, int outgoing_copies)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`down(Message msg)`	A message is sent down the stack.
`int`	`getIncomingCopies()`
`int`	`getOutgoingCopies()`
`boolean`	`isCopyMulticastMsgs()`
`boolean`	`isCopyUnicastMsgs()`
`DUPL`	`setCopyMulticastMsgs(boolean copy_multicast_msgs)`
`DUPL`	`setCopyUnicastMsgs(boolean copy_unicast_msgs)`
`DUPL`	`setIncomingCopies(int incoming_copies)`
`DUPL`	`setOutgoingCopies(int outgoing_copies)`
`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, 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, toString, up

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - incoming_copies
```
protected int incoming_copies
```
  - outgoing_copies
```
protected int outgoing_copies
```
  - copy_unicast_msgs
```
protected boolean copy_unicast_msgs
```
  - copy_multicast_msgs
```
protected boolean copy_multicast_msgs
```
- Constructor Detail
  - DUPL
```
public DUPL()
```
  - DUPL
```
public DUPL(boolean copy_multicast_msgs,
            boolean copy_unicast_msgs,
            int incoming_copies,
            int outgoing_copies)
```
- Method Detail
  - getIncomingCopies
```
public int getIncomingCopies()
```
  - setIncomingCopies
```
public DUPL setIncomingCopies(int incoming_copies)
```
  - getOutgoingCopies
```
public int getOutgoingCopies()
```
  - setOutgoingCopies
```
public DUPL setOutgoingCopies(int outgoing_copies)
```
  - isCopyUnicastMsgs
```
public boolean isCopyUnicastMsgs()
```
  - setCopyUnicastMsgs
```
public DUPL setCopyUnicastMsgs(boolean copy_unicast_msgs)
```
  - isCopyMulticastMsgs
```
public boolean isCopyMulticastMsgs()
```
  - setCopyMulticastMsgs
```
public DUPL setCopyMulticastMsgs(boolean copy_multicast_msgs)
```
  - down
```
public java.lang.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 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

Constructor	Description
`DUPL()`
`DUPL(boolean copy_multicast_msgs, boolean copy_unicast_msgs, int incoming_copies, int outgoing_copies)`

Class DUPL

Nested Class Summary

Field Summary

Fields inherited from class org.jgroups.stack.Protocol

Constructor Summary

Method Summary

Methods inherited from class org.jgroups.stack.Protocol

Methods inherited from class java.lang.Object

Field Detail

incoming_copies

outgoing_copies

copy_unicast_msgs

copy_multicast_msgs

Constructor Detail

DUPL

DUPL

Method Detail

getIncomingCopies

setIncomingCopies

getOutgoingCopies

setOutgoingCopies

isCopyUnicastMsgs

setCopyUnicastMsgs

isCopyMulticastMsgs

setCopyMulticastMsgs

down

up

up