org.jgroups.protocols.pbcast
Class ClientGmsImpl
java.lang.Object
org.jgroups.protocols.pbcast.GmsImpl
org.jgroups.protocols.pbcast.ClientGmsImpl
public class ClientGmsImpl
- extends GmsImpl
Client part of GMS. Whenever a new member wants to join a group, it starts in the CLIENT role.
No multicasts to the group will be received and processed until the member has been joined and
turned into a SERVER (either coordinator or participant, mostly just participant). This class
only implements Join
(called by clients who want to join a certain group, and
ViewChange
which is called by the coordinator that was contacted by this client, to
tell the client what its initial membership is.
- Version:
- $Revision: 1.34.2.2 $
- Author:
- Bela Ban
Fields inherited from class org.jgroups.protocols.pbcast.GmsImpl |
gms, log |
Methods inherited from class org.jgroups.protocols.pbcast.GmsImpl |
handleExit, handleMergeCancelled, handleMergeRequest, handleMergeResponse, handleMergeView, iWouldBeCoordinator, merge, sendMergeRejectedResponse, start, stop, wrongMethod |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ClientGmsImpl
public ClientGmsImpl(GMS g)
init
public void init()
throws java.lang.Exception
- Overrides:
init
in class GmsImpl
- Throws:
java.lang.Exception
join
public void join(Address mbr)
- Joins this process to a group. Determines the coordinator and sends a unicast
handleJoin() message to it. The coordinator returns a JoinRsp and then broadcasts the new view, which
contains a message digest and the current membership (including the joiner). The joiner is then
supposed to install the new view and the digest and starts accepting mcast messages. Previous
mcast messages were discarded (this is done in PBCAST).
If successful, impl is changed to an instance of ParticipantGmsImpl.
Otherwise, we continue trying to send join() messages to the coordinator,
until we succeed (or there is no member in the group. In this case, we create our own singleton group).
When GMS.disable_initial_coord is set to true, then we won't become coordinator on receiving an initial
membership of 0, but instead will retry (forever) until we get an initial membership of > 0.
- Specified by:
join
in class GmsImpl
- Parameters:
mbr
- Our own address (assigned through SET_LOCAL_ADDRESS)
leave
public void leave(Address mbr)
- Specified by:
leave
in class GmsImpl
handleJoinResponse
public void handleJoinResponse(JoinRsp join_rsp)
- Specified by:
handleJoinResponse
in class GmsImpl
handleLeaveResponse
public void handleLeaveResponse()
- Specified by:
handleLeaveResponse
in class GmsImpl
suspect
public void suspect(Address mbr)
- Specified by:
suspect
in class GmsImpl
unsuspect
public void unsuspect(Address mbr)
- Specified by:
unsuspect
in class GmsImpl
handleMembershipChange
public void handleMembershipChange(java.util.Collection newMembers,
java.util.Collection leavingMembers,
java.util.Collection suspectedMembers)
- Specified by:
handleMembershipChange
in class GmsImpl
handleViewChange
public void handleViewChange(View new_view,
Digest digest)
- Does nothing. Discards all views while still client.
- Specified by:
handleViewChange
in class GmsImpl
handleUpEvent
public boolean handleUpEvent(Event evt)
- Returns immediately. Clients don't handle suspect() requests
- Overrides:
handleUpEvent
in class GmsImpl
Copyright ? 1998-2006 Bela Ban. All Rights Reserved.