X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-akka-raft%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fraft%2Fbehaviors%2FAbstractRaftActorBehavior.java;h=f235221da940d4cb21c491e78b9624c2afa18a80;hp=eed74bba82fbf8a4f8e4c1b5431887451c49d59d;hb=032371baa081315920e52a7806ea09676e47316b;hpb=59c4f0b68407ad243976fa7e64ba19d39147abbe

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractRaftActorBehavior.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractRaftActorBehavior.java
index eed74bba82..f235221da9 100644
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractRaftActorBehavior.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/AbstractRaftActorBehavior.java
@@ -390,7 +390,7 @@ public abstract class AbstractRaftActorBehavior implements RaftActorBehavior {
     }
 
     protected RaftActorBehavior switchBehavior(RaftActorBehavior behavior) {
-        LOG.info("Switching from behavior {} to {}", this.state(), behavior.state());
+        LOG.info("{} :- Switching from behavior {} to {}", context.getId(), this.state(), behavior.state());
         try {
             close();
         } catch (Exception e) {
@@ -399,4 +399,27 @@ public abstract class AbstractRaftActorBehavior implements RaftActorBehavior {
 
         return behavior;
     }
+
+    protected int getMajorityVoteCount(int numPeers) {
+        // Votes are required from a majority of the peers including self.
+        // The numMajority field therefore stores a calculated value
+        // of the number of votes required for this candidate to win an
+        // election based on it's known peers.
+        // If a peer was added during normal operation and raft replicas
+        // came to know about them then the new peer would also need to be
+        // taken into consideration when calculating this value.
+        // Here are some examples for what the numMajority would be for n
+        // peers
+        // 0 peers = 1 numMajority -: (0 + 1) / 2 + 1 = 1
+        // 2 peers = 2 numMajority -: (2 + 1) / 2 + 1 = 2
+        // 4 peers = 3 numMajority -: (4 + 1) / 2 + 1 = 3
+
+        int numMajority = 0;
+        if (numPeers > 0) {
+            int self = 1;
+            numMajority = (numPeers + self) / 2 + 1;
+        }
+        return numMajority;
+
+    }
 }