org.jgroups.protocols

Class SHARED_LOOPBACK

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.TP

org.jgroups.protocols.SHARED_LOOPBACK

public class SHARED_LOOPBACK
extends TP

Loopback transport shared by all channels within the same VM. Property for testing is that no messages are lost. Allows us to test various protocols (with ProtocolTester) at maximum speed.

Author:

Bela Ban

Nested Class Summary

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

TP.Bundler, TP.DiagnosticsHandler, TP.ProbeHandler, TP.ProtocolAdapter

Field Summary

Fields inherited from class org.jgroups.protocols.TP

bind_addr, bind_interface_str, bind_port, bundler, bundler_capacity, bundler_type, can_bind_to_mcast_addr, channel_name, connect_count, connectLock, default_thread_factory, diag_handler, diagnostics_addr, diagnostics_port, discard_incompatible_packets, enable_bundling, enable_diagnostics, enable_unicast_bundling, f, global_thread_factory, header, last_discovery_request, LIST, log_discard_msgs, logical_addr_cache, logical_addr_cache_expiration, logical_addr_cache_max_size, loopback, max_bundle_size, max_bundle_timeout, members, MULTICAST, num_bytes_received, num_bytes_sent, num_incoming_msgs_received, num_msgs_received, num_msgs_sent, num_oob_msgs_received, OOB, oob_thread_factory, oob_thread_pool, oob_thread_pool_enabled, oob_thread_pool_keep_alive_time, oob_thread_pool_max_threads, oob_thread_pool_min_threads, oob_thread_pool_queue, oob_thread_pool_queue_enabled, oob_thread_pool_queue_max_size, pool_thread_group, port_range, preregistered_probe_handlers, print_function, receive_interfaces, receive_on_all_interfaces, singleton_name, socket_factory, thread_naming_pattern, thread_pool, thread_pool_enabled, thread_pool_keep_alive_time, thread_pool_max_threads, thread_pool_min_threads, thread_pool_queue, thread_pool_queue_enabled, thread_pool_queue_max_size, thread_pool_rejection_policy, tick_time, timer, timer_keep_alive_time, timer_max_threads, timer_min_threads, timer_queue_max_size, timer_thread_factory, timer_type, up_prots, wheel_size, who_has_cache

Fields inherited from class org.jgroups.stack.Protocol

down_prot, ergonomics, id, log, name, stack, stats, up_prot

Constructor Summary

Constructors

Constructor and Description
SHARED_LOOPBACK()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	down(Event evt) Caller by the layer above this layer.
java.lang.String	getInfo()
protected PhysicalAddress	getPhysicalAddress()
void	init() Called after instance has been created (null constructor) and before protocol is started.
void	sendMulticast(byte[] data, int offset, int length) Send to all members in the group.
protected void	sendToSingleMember(Address dest, byte[] buf, int offset, int length)
void	sendUnicast(PhysicalAddress dest, byte[] data, int offset, int length) Send a unicast to 1 member.
void	start() Creates the unicast and multicast sockets and starts the unicast and multicast receiver threads
void	stop() This method is called on a Channel.disconnect().
boolean	supportsMulticasting() Whether or not hardware multicasting is supported
java.lang.String	toString()

Methods inherited from class org.jgroups.protocols.TP

addPhysicalAddressToCache, clearLogicalAddressCache, createThreadPool, destroy, dispatchToThreadPool, doSend, dumpTimerTasks, evictLogicalAddressCache, fetchLocalAddresses, getBindAddress, getBindAddressAsInetAddress, getBindPort, getBindToAllInterfaces, getBundlerBufferSize, getDefaultThreadPool, getDefaultThreadPoolThreadFactory, getLogDiscardMessages, getMaxBundleSize, getMaxBundleTimeout, getNumBytesReceived, getNumBytesSent, getNumMessagesReceived, getNumMessagesSent, getNumTimerTasks, getOOBMaxQueueSize, getOOBMessages, getOOBPoolSize, getOOBQueueSize, getOOBThreadPool, getOOBThreadPoolKeepAliveTime, getOOBThreadPoolMaxThreads, getOOBThreadPoolMinThreads, getOOBThreadPoolThreadFactory, getPhysicalAddressFromCache, getPoolThreadGroup, getPortRange, getReceiveInterfaces, getRegularMaxQueueSize, getRegularMessages, getRegularPoolSize, getRegularQueueSize, getSendInterfaces, getSingletonName, getSocketFactory, getThreadFactory, getThreadNamingPattern, getThreadPoolKeepAliveTime, getThreadPoolMaxThreads, getThreadPoolMinThreads, getTimer, getTimerClass, getTimerKeepAliveTime, getTimerMaxThreads, getTimerMinThreads, getTimerQueueSize, getTimerThreadFactory, getTimerThreads, getUpProtocols, handleConnect, handleDisconnect, handleDownEvent, isDefaulThreadPoolEnabled, isDiscardIncompatiblePackets, isEnableBundling, isEnableUnicastBundling, isLoopback, isOOBThreadPoolEnabled, isReceiveOnAllInterfaces, isSendOnAllInterfaces, isSingleton, isUseIncomingPacketHandler, parseRejectionPolicy, passMessageUp, passToAllUpProtocols, printLogicalAddressCache, readMessage, readMessageList, receive, registerLocalAddress, registerProbeHandler, removeLogicalAddressFromCache, resetStats, send, sendToAllPhysicalAddresses, setBindAddress, setBindPort, setBindToAllInterfaces, setDefaultThreadPool, setDefaultThreadPoolThreadFactory, setDiscardIncompatiblePackets, setEnableBundling, setEnableUnicastBundling, setInAllThreadFactories, setLogDiscardMessages, setLoopback, setMaxBundleSize, setMaxBundleTimeout, setOOBRejectionPolicy, setOOBThreadPool, setOOBThreadPoolKeepAliveTime, setOOBThreadPoolMaxThreads, setOOBThreadPoolMinThreads, setOOBThreadPoolThreadFactory, setPortRange, setRegularRejectionPolicy, setSocketFactory, setSourceAddress, setThreadFactory, setThreadNames, setThreadPoolKeepAliveTime, setThreadPoolMaxThreads, setThreadPoolMinThreads, setThreadPoolQueueEnabled, setTimerKeepAliveTime, setTimerMaxThreads, setTimerMinThreads, setTimerThreadFactory, setUseConcurrentStack, shutdownThreadPool, unregisterProbeHandler, unsetThreadNames, up, verifyRejectionPolicy, writeMessage, writeMessageList

Methods inherited from class org.jgroups.stack.Protocol

downThreadEnabled, dumpStats, enableStats, getConfigurableObjects, getDownProtocol, getId, getLevel, getName, getProperties, getProtocolStack, getTransport, getUpProtocol, getValue, isErgonomics, printStats, providedDownServices, providedUpServices, requiredDownServices, requiredUpServices, setDownProtocol, setErgonomics, setId, setLevel, setProperties, setPropertiesInternal, setProperty, setProtocolStack, setUpProtocol, setValue, setValues, statsEnabled, upThreadEnabled

Methods inherited from class java.lang.Object

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

Constructor Detail

SHARED_LOOPBACK

public SHARED_LOOPBACK()

Method Detail

supportsMulticasting

public boolean supportsMulticasting()

Description copied from class: TP

Whether or not hardware multicasting is supported

Specified by:

supportsMulticasting in class TP

toString

public java.lang.String toString()

Overrides:

toString in class TP

sendMulticast

public void sendMulticast(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:

sendMulticast in class TP

Parameters:

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

Throws:

java.lang.Exception

sendUnicast

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

Description copied from class: TP

Send a unicast to 1 member. Note that the destination address is a *physical*, not a logical address

Specified by:

sendUnicast 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

sendToSingleMember

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

Overrides:

sendToSingleMember in class TP

Throws:

java.lang.Exception

getInfo

public java.lang.String getInfo()

Specified by:

getInfo in class TP

getPhysicalAddress

protected PhysicalAddress getPhysicalAddress()

Specified by:

getPhysicalAddress in class TP

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

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

stop

public void stop()

Description copied from class: Protocol

This method is called on a Channel.disconnect(). Stops work (e.g. by closing multicast socket). Will be called from top to bottom. This means that at the time of the method invocation the neighbor protocol below is still working. This method will replace the STOP, STOP_OK, CLEANUP and CLEANUP_OK events. The ProtocolStack guarantees that when this method is called all messages in the down queue will have been flushed

Overrides:

stop in class TP

down

public java.lang.Object down(Event evt)

Description copied from class: TP

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