Add ShutDown message to RaftActor to transfer leader 65/31565/8
authorTom Pantelis <tpanteli@brocade.com>
Wed, 16 Dec 2015 17:37:42 +0000 (12:37 -0500)
committerTom Pantelis <tpanteli@brocade.com>
Mon, 21 Dec 2015 15:23:21 +0000 (10:23 -0500)
commit4e000b89c3b5ac555cb1e2c39e999a8633b48a96
treeab2480faef6e8ae328469842ce454cb5986be64e
parentdb8fed63e18fccd2721fa7e189b2278a4f240f2c
Add ShutDown message to RaftActor to transfer leader

Added a ShutDown message to gracefully stop a RaftActor. If the leader,
it attempts leadership transfer as follows:

1) Send a LeaderStateChanged message with a null leader Id to the local
RoleChangeNotifier. This will cause the ShardManager to clear it's
cached leader state and primaryInfoCache.

2) Send a LeaderTransitioning message to each follower so each can send
LeaderStateChanged messages to their local RoleChangeNotifiers.

3) Call a protected method, pauseLeader, passing the
RaftActorLeadershipTransferCohort. This allows derived classes to
perform work prior to transferring leadership. The Shard will wait for
current transactions to complete.

4) After pause is complete, the run method on the
RaftActorLeadershipTransferCohort is called which in turn calls
transferLeadership on the Leader.

5) When transfer is complete, send a PoisonPill to self.

If not the leader or has no followers, it just calls pauseLeader an
sends a PoisonPill on completion.

Change-Id: I27fa8a95f260b75516b7e558caea4a1a3255dda3
Signed-off-by: Tom Pantelis <tpanteli@brocade.com>
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/RaftActor.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/RaftActorLeadershipTransferCohort.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Leader.java
opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/client/messages/Shutdown.java [new file with mode: 0644]
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/AbstractRaftActorIntegrationTest.java
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/LeadershipTransferIntegrationTest.java [new file with mode: 0644]
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/MockRaftActor.java
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/RaftActorLeadershipTransferCohortTest.java [new file with mode: 0644]
opendaylight/md-sal/sal-akka-raft/src/test/java/org/opendaylight/controller/cluster/raft/behaviors/LeaderTest.java

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