org.jgroups.protocols
Class TCPGOSSIP
java.lang.Object
org.jgroups.stack.Protocol
org.jgroups.protocols.Discovery
org.jgroups.protocols.TCPGOSSIP
public class TCPGOSSIP
- extends Discovery
The TCPGOSSIP protocol layer retrieves the initial membership (used by the
GMS when started by sending event FIND_INITIAL_MBRS down the stack). We do
this by contacting one or more GossipRouters, which must be running at
well-known addresses:ports. The responses should allow us to determine the
coordinator whom we have to contact, e.g. in case we want to join the group.
When we are a server (after having received the BECOME_SERVER event), we'll
respond to TCPGOSSIP requests with a TCPGOSSIP response.
The FIND_INITIAL_MBRS event will eventually be answered with a
FIND_INITIAL_MBRS_OK event up the stack.
- Author:
- Bela Ban
Methods inherited from class org.jgroups.protocols.Discovery |
discoveryRequestReceived, down, findAllMembers, findAllViews, findAllViewsAsString, findInitialMembers, findInitialMembers, findInitialMembersAsString, getNumberOfDiscoveryRequestsSent, getNumInitialMembers, getNumPingRequests, getTimeout, getView, makeView, providedUpServices, resetStats, setNumInitialMembers, setNumPingRequests, setTimeout, up |
Methods inherited from class org.jgroups.stack.Protocol |
downThreadEnabled, dumpStats, enableStats, getConfigurableObjects, getDownProtocol, getId, getLevel, getName, getProperties, getProtocolStack, getSocketFactory, getThreadFactory, getTransport, getUpProtocol, getValue, isErgonomics, printStats, providedDownServices, requiredDownServices, requiredUpServices, setDownProtocol, setErgonomics, setId, setLevel, setProperties, setPropertiesInternal, setProperty, setProtocolStack, setSocketFactory, setUpProtocol, setValue, setValues, statsEnabled, upThreadEnabled |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
TCPGOSSIP
public TCPGOSSIP()
setInitialHosts
public void setInitialHosts(java.util.List<java.net.InetSocketAddress> hosts)
getInitialHosts
public java.util.List<java.net.InetSocketAddress> getInitialHosts()
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
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 Protocol
handleConnect
public void handleConnect()
- Overrides:
handleConnect
in class Discovery
handleDisconnect
public void handleDisconnect()
- Overrides:
handleDisconnect
in class Discovery
sendGetMembersRequest
public void sendGetMembersRequest(java.lang.String cluster_name,
Promise promise,
boolean return_views_only)
throws java.lang.Exception
- Specified by:
sendGetMembersRequest
in class Discovery
- Throws:
java.lang.Exception
addInitialHost
public void addInitialHost(java.lang.String hostname,
int port)
removeInitialHost
public boolean removeInitialHost(java.lang.String hostname,
int port)
connectAllStubs
protected void connectAllStubs(java.lang.String group,
Address logical_addr)
connect
protected void connect(RouterStub stub,
java.lang.String group,
Address logical_addr)
Copyright © 1998-2009 Bela Ban / Red Hat. All Rights Reserved.