org.jgroups.protocols
Class LOOPBACK

java.lang.Object
  org.jgroups.stack.Protocol
      org.jgroups.protocols.TP
          org.jgroups.protocols.LOOPBACK

public class LOOPBACK
extends TP

Makes copies of outgoing messages, swaps sender and receiver and sends the message back up the stack.

Nested Class Summary

Nested classes/interfaces inherited from class org.jgroups.protocols.TP

TP.ProbeHandler, TP.ProtocolAdapter

Field Summary

Fields inherited from class org.jgroups.protocols.TP

bind_addr, channel_name, discard_incompatible_packets, global_thread_factory, local_addr, members, persistent_ports, persistent_ports_file, pm, pm_expiry_time, thread_naming_pattern, timer, timer_thread_factory, view

Fields inherited from class org.jgroups.stack.Protocol

down_prot, log, props, stack, stats, up_prot

Constructor Summary

LOOPBACK()

Method Summary

void	destroy() This method is called on a Channel.close().
java.lang.Object	down(Event evt) Caller by the layer above this layer.
java.lang.String	getInfo()
java.lang.String	getName()
void	init() Called after instance has been created (null constructor) and before protocol is started.
void	postUnmarshalling(Message msg, Address dest, Address src, boolean multicast)
void	postUnmarshallingList(Message msg, Address dest, boolean multicast)
void	sendToAllMembers(byte[] data, int offset, int length) Send to all members in the group.
void	sendToSingleMember(Address dest, byte[] data, int offset, int length) Send to all members in the group.
void	start() Creates the unicast and multicast sockets and starts the unicast and multicast receiver threads
java.lang.String	toString() debug only

Methods inherited from class org.jgroups.protocols.TP

createThreadPool, dumpStats, getBindAddress, getBindPort, getBindToAllInterfaces, getChannelName, getDefaultThreadPool, getDefaultThreadPoolThreadFactory, getIncomingKeepAliveTime, getIncomingMaxPoolSize, getIncomingMaxQueueSize, getIncomingMessages, getIncomingMinPoolSize, getIncomingPoolSize, getIncomingQueueSize, getLocalAddress, getMaxBundleSize, getMaxBundleTimeout, getNumBytesReceived, getNumBytesSent, getNumMessagesReceived, getNumMessagesSent, getOOBKeepAliveTime, getOOBMaxPoolSize, getOOBMaxQueueSize, getOOBMessages, getOOBMinPoolSize, getOOBPoolSize, getOOBQueueSize, getOOBThreadPool, getOOBThreadPoolThreadFactory, getReceiveInterfaces, getSendInterfaces, getSingletonName, getThreadFactory, getThreadNamingPattern, getTimer, getTimerThreadFactory, getUpProtocols, handleConfigEvent, handleConnect, handleDisconnect, handleDownEvent, isDefaulThreadPoolEnabled, isDiscardIncompatiblePackets, isEnable_unicast_bundling, isEnableBundling, isLoopback, isOOBThreadPoolEnabled, isReceiveOnAllInterfaces, isSendOnAllInterfaces, isUseIncomingPacketHandler, passToAllUpProtocols, receive, registerProbeHandler, resetStats, sendUpLocalAddressEvent, setBindAddress, setBindPort, setBindToAllInterfaces, setDefaultThreadPool, setDefaultThreadPoolThreadFactory, setDiscardIncompatiblePackets, setEnable_unicast_bundling, setEnableBundling, setIncomingKeepAliveTime, setIncomingMaxPoolSize, setIncomingMinPoolSize, setLoopback, setMaxBundleSize, setMaxBundleTimeout, setOOBKeepAliveTime, setOOBMaxPoolSize, setOOBMinPoolSize, setOOBThreadPool, setOOBThreadPoolThreadFactory, setProperties, setThreadFactory, setThreadNames, setTimerThreadFactory, stop, unregisterProbeHandler, unsetThreadNames, up

Methods inherited from class org.jgroups.stack.Protocol

downThreadEnabled, enableStats, getDownProtocol, getProperties, getProtocolStack, getTransport, getUpProtocol, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, setDownProtocol, setPropertiesInternal, setProtocolStack, setUpProtocol, statsEnabled, upThreadEnabled

Methods inherited from class java.lang.Object

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

Constructor Detail

LOOPBACK

public LOOPBACK()

Method Detail

toString

public java.lang.String toString()

Description copied from class: TP

debug only

Overrides:

toString in class TP

sendToAllMembers

public void sendToAllMembers(byte[] data,
                             int offset,
                             int length)
                      throws java.lang.Exception

Description copied from class: TP

Send to all members in the group. UDP would use an IP multicast message, whereas TCP would send N messages, one for each member

Specified by:

sendToAllMembers in class TP

Parameters:

data - The data to be sent. This is not a copy, so don't modify it

Throws:

java.lang.Exception

sendToSingleMember

public void sendToSingleMember(Address dest,
                               byte[] data,
                               int offset,
                               int length)
                        throws java.lang.Exception

Description copied from class: TP

Send to all members in the group. UDP would use an IP multicast message, whereas TCP would send N messages, one for each member

Specified by:

sendToSingleMember in class TP

Parameters:

dest - Must be a non-null unicast address

data - The data to be sent. This is not a copy, so don't modify it

Throws:

java.lang.Exception

getInfo

public java.lang.String getInfo()

Specified by:

getInfo in class TP

postUnmarshalling

public void postUnmarshalling(Message msg,
                              Address dest,
                              Address src,
                              boolean multicast)

Specified by:

postUnmarshalling in class TP

postUnmarshallingList

public void postUnmarshallingList(Message msg,
                                  Address dest,
                                  boolean multicast)

Specified by:

postUnmarshallingList in class TP

getName

public java.lang.String getName()

Specified by:

getName in class Protocol

init

public void init()
          throws java.lang.Exception

Description copied from class: Protocol

Called after instance has been created (null constructor) and before protocol is started. Properties are already set. Other protocols are not yet connected and events cannot yet be sent.

Overrides:

init in class TP

Throws:

java.lang.Exception - Thrown if protocol cannot be initialized successfully. This will cause the ProtocolStack to fail, so the channel constructor will throw an exception

destroy

public void destroy()

Description copied from class: Protocol

This method is called on a Channel.close(). Does some cleanup; after the call the VM will terminate

Overrides:

destroy in class TP

start

public void start()
           throws java.lang.Exception

Description copied from class: TP

Creates the unicast and multicast sockets and starts the unicast and multicast receiver threads

Overrides:

start in class TP

Throws:

java.lang.Exception - Thrown if protocol cannot be started successfully. This will cause the ProtocolStack to fail, so Channel.connect(String) will throw an exception

down

public java.lang.Object down(Event evt)

Caller by the layer above this layer. Usually we just put this Message into the send queue and let one or more worker threads handle it. A worker thread then removes the Message from the send queue, performs a conversion and adds the modified Message to the send queue of the layer below it, by calling Down).

Overrides:

down in class TP