Package org.jgroups.protocols

Class SimpleTCP

java.lang.Object

org.jgroups.stack.Protocol

org.jgroups.protocols.TP

org.jgroups.protocols.SimpleTCP

All Implemented Interfaces:

Lifecycle, DiagnosticsHandler.ProbeHandler

public class SimpleTCP
extends TP

Bare-bones thread-per-connection TCP-based transport. Only used to compare with TCP or TCP_NIO2, don't use in production!

Since:

4.0

Author:

Bela Ban

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	SimpleTCP.Acceptor	Calls ServerSocket.accept() and creates new Connection objects
protected class	SimpleTCP.Connection	1 connection per peer to send and receive messages

Field Summary

Fields

Modifier and Type	Field	Description
protected SimpleTCP.Acceptor	acceptor
protected java.util.Map<Address,java.net.SocketAddress>	addr_table
protected int	buffered_input_stream_size
protected int	buffered_output_stream_size
protected java.util.Map<java.net.SocketAddress,SimpleTCP.Connection>	connections
protected int	recv_buf_size
protected int	send_buf_size
protected java.net.ServerSocket	srv_sock

Fields inherited from class org.jgroups.protocols.TP

async_executor, bind_addr, bind_port, bundler, bundler_type, cluster_name, connectLock, diag_handler, external_addr, external_port, header, is_trace, last_discovery_request, LIST, local_physical_addr, local_transport, local_transport_class, log_discard_msgs, log_discard_msgs_version, logical_addr_cache, logical_addr_cache_expiration, logical_addr_cache_max_size, logical_addr_cache_reaper, logical_addr_cache_reaper_interval, loopback_copy, loopback_separate_thread, members, message_processing_policy, MIN_WAIT_BETWEEN_DISCOVERIES, msg_factory, msg_factory_class, MSG_OVERHEAD, msg_processing_policy, msg_stats, MULTICAST, port_range, print_function, receive_interfaces, receive_on_all_interfaces, socket_factory, suppress_log_different_cluster, suppress_log_different_version, suppress_time_different_cluster_warnings, suppress_time_different_version_warnings, thread_factory, thread_naming_pattern, thread_pool, time_service, time_service_interval, timer, timer_handle_non_blocking_tasks, use_virtual_threads, view, who_has_cache, who_has_cache_timeout

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
SimpleTCP()

Method Summary

Modifier and Type	Method	Description
protected java.lang.Object	_down(Message msg)
boolean	addPhysicalAddressToCache(Address logical_addr, PhysicalAddress physical_addr)
void	destroy()	This method is called on a JChannel.close().
java.lang.Object	down(Event evt)	An event is to be sent down the stack.
java.lang.Object	down(Message msg)	A message needs to be sent to a single member or all members
protected SimpleTCP.Connection	getConnection(java.net.SocketAddress dest)
java.lang.String	getInfo()
protected PhysicalAddress	getPhysicalAddress()
void	init()	Called after a protocol has been created and before the protocol is started.
java.lang.String	printAddressTable()
protected void	sendTo(Address dest, byte[] buffer, int offset, int length)
void	sendUnicast(PhysicalAddress dest, byte[] data, int offset, int length)	Send a unicast to a member.
void	start()	Creates the unicast and multicast sockets and starts the unicast and multicast receiver threads
void	stop()	Called on a JChannel.disconnect(); stops work (e.g.
boolean	supportsMulticasting()	Whether hardware multicasting is supported

Methods inherited from class org.jgroups.protocols.TP

_send, addPhysicalAddressToCache, bundler, clearDifferentClusterCache, clearDifferentVersionCache, clearLogicalAddressCache, createBundler, createDiagnosticsHandler, defaultHeaders, disableDiagnostics, doSend, dumpTimerTasks, enableBlockingTimerTasks, enableDiagnostics, enableStats, evictLogicalAddressCache, evictLogicalAddressCache, fetchLocalAddresses, fetchPhysicalAddrs, fetchResponsesFromDiscoveryProtocol, getAllPhysicalAddressesFromCache, getAsyncExecutor, getBindAddr, getBindAddress, getBindPort, getBundler, getBundlerClass, getBundlerType, getClusterName, getClusterNameAscii, getDiagnosticsHandler, getDifferentClusterMessages, getDifferentVersionMessages, getExternalAddr, getExternalPort, getLocalPhysicalAddress, getLocalTransport, getLogDiscardMessages, getLogDiscardMessagesVersion, getLogicalAddrCacheExpiration, getLogicalAddrCacheMaxSize, getLogicalAddrCacheReaperInterval, getLogicalAddressCache, getMessageFactory, getMessageFactoryClass, getMessageProcessingPolicy, getMessageStats, getMsgFactoryClass, getNumThreads, getNumTimerTasks, getPhysicalAddressFromCache, getPortRange, getReceiveInterfaces, getSocketFactory, getSuppressTimeDifferentClusterWarnings, getSuppressTimeDifferentVersionWarnings, getThreadFactory, getThreadNamingPattern, getThreadPool, getTimer, getTimerClass, getTimerThreads, getTimeService, getTimeServiceInterval, getWhoHasCacheTimeout, handleConnect, handleDisconnect, handleMessageBatch, handleProbe, handleSingleMessage, isLogicalAddressCacheReaperRunning, isMulticastCapable, isReceiveOnAllInterfaces, isTrace, isTrace, localPhysicalAddress, logDiscardMsgs, logDiscardMsgs, logDiscardMsgsVersion, logDiscardMsgsVersion, loggerType, loopback, loopbackCopy, loopbackCopy, loopbackSeparateThread, loopbackSeparateThread, passBatchUp, passMessageUp, printLogicalAddressCache, printWhoHasCache, processBatch, receive, receive, receiveOnAllInterfaces, receiveOnAllInterfaces, registerLocalAddress, registerProbeHandler, removeCancelledTimerTasks, removeLogicalAddressFromCache, resetStats, sameCluster, sendToAll, setAddress, setAsyncExecutor, setBindAddr, setBindAddress, setBindPort, setBindToAllInterfaces, setBundler, setBundlerType, setDiagnosticsHandler, setExternalAddr, setExternalPort, setInAllThreadFactories, setLevel, setLocalTransport, setLocalTransport, setLogDiscardMessages, setLogDiscardMessagesVersion, setLogicalAddrCacheExpiration, setLogicalAddrCacheMaxSize, setLogicalAddrCacheReaperInterval, setMessageFactory, setMessageProcessingPolicy, setMsgFactoryClass, setPortRange, setSocketFactory, setSourceAddress, setSuppressTimeDifferentClusterWarnings, setSuppressTimeDifferentVersionWarnings, setThreadFactory, setThreadNames, setThreadPool, setTimer, setTimeService, setTimeServiceInterval, setWhoHasCacheTimeout, startDiagnostics, stopDiagnostics, supportedKeys, timestamp, toString, unicastDestMismatch, unregisterProbeHandler, unsetThreadNames, useVirtualThreads, useVirtualThreads, versionMatch, view

Methods inherited from class org.jgroups.stack.Protocol

accept, addPolicy, addr, addr, afterCreationHook, down, getAddress, getComponents, getDownProtocol, getDownServices, getId, getIdsAbove, getLevel, getLog, getName, getPolicies, getProtocolStack, getTransport, getUpProtocol, getUpServices, getValue, isErgonomics, level, parse, policies, providedDownServices, providedUpServices, removePolicy, requiredDownServices, requiredUpServices, resetStatistics, setDownProtocol, setErgonomics, setId, setPolicies, setProtocolStack, setUpProtocol, setValue, statsEnabled, up, up, up

Methods inherited from class java.lang.Object

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

Field Detail

recv_buf_size

protected int recv_buf_size

send_buf_size

protected int send_buf_size

buffered_input_stream_size

protected int buffered_input_stream_size

buffered_output_stream_size

protected int buffered_output_stream_size

srv_sock

protected java.net.ServerSocket srv_sock

acceptor

protected SimpleTCP.Acceptor acceptor

connections

protected final java.util.Map<java.net.SocketAddress,SimpleTCP.Connection> connections

addr_table

protected final java.util.Map<Address,java.net.SocketAddress> addr_table

Constructor Detail

SimpleTCP

public SimpleTCP()

Method Detail

supportsMulticasting

public boolean supportsMulticasting()

Description copied from class: TP

Whether hardware multicasting is supported

Specified by:

supportsMulticasting in class TP

printAddressTable

public java.lang.String printAddressTable()

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 a 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

getInfo

public java.lang.String getInfo()

Specified by:

getInfo in class TP

init

public void init()
          throws java.lang.Exception

Description copied from class: Protocol

Called after a protocol has been created and before the protocol is started. Attributes are already set. Other protocols are not yet connected and events cannot yet be sent.

Specified by:

init in interface Lifecycle

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 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

Specified by:

start in interface Lifecycle

Overrides:

start in class TP

Throws:

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

stop

public void stop()

Description copied from class: Protocol

Called on a JChannel.disconnect(); stops work (e.g. by closing multicast socket). Will be called from top to bottom.

Specified by:

stop in interface Lifecycle

Overrides:

stop in class TP

destroy

public void destroy()

Description copied from class: Protocol

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

Specified by:

destroy in interface Lifecycle

Overrides:

destroy in class TP

down

public java.lang.Object down(Event evt)

Description copied from class: Protocol

An event is to be sent down the stack. A protocol may want to examine its type and perform some action on it, depending on the event's type. If the event is a message MSG, then the protocol may need to add a header to it (or do nothing at all) before sending it down the stack using down_prot.down().

Overrides:

down in class TP

down

public java.lang.Object down(Message msg)

Description copied from class: TP

A message needs to be sent to a single member or all members

Overrides:

down in class TP

_down

protected java.lang.Object _down(Message msg)
                          throws java.lang.Exception

Throws:

java.lang.Exception

sendTo

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

Overrides:

sendTo in class TP

Throws:

java.lang.Exception

getConnection

protected SimpleTCP.Connection getConnection(java.net.SocketAddress dest)
                                      throws java.lang.Exception

Throws:

java.lang.Exception

addPhysicalAddressToCache

public boolean addPhysicalAddressToCache(Address logical_addr,
                                         PhysicalAddress physical_addr)

Overrides:

addPhysicalAddressToCache in class TP

getPhysicalAddress

protected PhysicalAddress getPhysicalAddress()

Specified by:

getPhysicalAddress in class TP