org.jgroups.protocols
Class BPING

java.lang.Object
  org.jgroups.stack.Protocol
      org.jgroups.protocols.Discovery
          org.jgroups.protocols.PING
              org.jgroups.protocols.BPING

All Implemented Interfaces:

java.lang.Runnable

public class BPING
extends PING
implements java.lang.Runnable

Broadcast PING. Uses UDP broadcasts to discover initial membership. This protocol is useless in IPv6 environments, as IPv6 has no notion of broadcast addresses. Use IP multicasts instead (e.g. PING or MPING) when running in IPv6.

Since:

2.12

Author:

Bela Ban

Nested Class Summary

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

Discovery.Responses

Field Summary

protected int	bind_port
protected java.lang.String	dest
protected java.net.InetAddress	dest_addr
protected int	port_range
protected java.lang.Thread	receiver
protected java.net.DatagramSocket	sock

Fields inherited from class org.jgroups.protocols.Discovery

break_on_coord_rsp, current_coord, force_sending_discovery_rsps, group_addr, is_coord, is_leaving, is_server, local_addr, members, num_discovery_requests, num_initial_members, num_initial_srv_members, ping_responses, return_entire_cache, stagger_timeout, timeout, timer, use_disk_cache, view

Fields inherited from class org.jgroups.stack.Protocol

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

Constructor Summary

BPING()

Method Summary

int	getBindPort()
void	init() Called after instance has been created (null constructor) and before protocol is started.
void	run()
protected void	sendMcastDiscoveryRequest(Message msg)
void	setBindPort(int bind_port)
void	start() This method is called on a Channel.connect(String).
void	stop() This method is called on a Channel.disconnect().

Methods inherited from class org.jgroups.protocols.PING

fetchClusterMembers, isDynamic, sendDiscoveryRequestsInParallel

Methods inherited from class org.jgroups.protocols.Discovery

deserialize, discoveryRequestReceived, down, findAllViews, findAllViewsAsString, findInitialMembers, findInitialMembersAsString, findMembers, getCurrentCoord, getNumberOfDiscoveryRequestsSent, getNumInitialMembers, getTimeout, getView, getViewId, handleConnect, handleDisconnect, isMergeRunning, providedUpServices, resetStats, sendDiscoveryRequest, sendDiscoveryResponse, serializeWithoutView, setForceSendingDiscoveryRsps, setNumInitialMembers, setTimeout, up

Methods inherited from class org.jgroups.stack.Protocol

destroy, dumpStats, enableStats, getConfigurableObjects, getDownProtocol, getDownServices, getId, getIdsAbove, getLevel, getName, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getUpServices, getValue, isErgonomics, printStats, providedDownServices, requiredDownServices, requiredUpServices, resetStatistics, setDownProtocol, setErgonomics, setId, setLevel, setProtocolStack, setSocketFactory, setUpProtocol, setValue, setValues, statsEnabled

Methods inherited from class java.lang.Object

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

Field Detail

dest

protected java.lang.String dest

bind_port

protected int bind_port

port_range

protected int port_range

sock

protected java.net.DatagramSocket sock

receiver

protected volatile java.lang.Thread receiver

dest_addr

protected java.net.InetAddress dest_addr

Constructor Detail

BPING

public BPING()

Method Detail

getBindPort

public int getBindPort()

setBindPort

public void setBindPort(int bind_port)

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 Discovery

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: Protocol

This method is called on a Channel.connect(String). Starts work. Protocols are connected and queues are ready to receive events. Will be called from bottom to top. This call will replace the START and START_OK events.

Overrides:

start in class Discovery

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 Discovery

sendMcastDiscoveryRequest

protected void sendMcastDiscoveryRequest(Message msg)

Overrides:

sendMcastDiscoveryRequest in class Discovery

run

public void run()

Specified by:

run in interface java.lang.Runnable