X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-akka-raft%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fcluster%2Fraft%2Fbehaviors%2FCandidate.java;h=09ffe056c3e94fcd4592f8f44f4e29123967f918;hb=664fc9940569ebfd54dcfc3db87bab66fad9300e;hp=c125bd32b60a5c5d714ea13e7008417f904d88dc;hpb=17d82f582a6bc13c78be3b19954ff8c021180e93;p=controller.git

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java
index c125bd32b6..09ffe056c3 100644
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/behaviors/Candidate.java
@@ -10,6 +10,7 @@ package org.opendaylight.controller.cluster.raft.behaviors;
 
 import akka.actor.ActorRef;
 import akka.actor.ActorSelection;
+import java.util.Set;
 import org.opendaylight.controller.cluster.raft.RaftActorContext;
 import org.opendaylight.controller.cluster.raft.RaftState;
 import org.opendaylight.controller.cluster.raft.base.messages.ElectionTimeout;
@@ -19,8 +20,6 @@ import org.opendaylight.controller.cluster.raft.messages.RaftRPC;
 import org.opendaylight.controller.cluster.raft.messages.RequestVote;
 import org.opendaylight.controller.cluster.raft.messages.RequestVoteReply;
 
-import java.util.Set;
-
 /**
  * The behavior of a RaftActor when it is in the CandidateState
  * <p/>
@@ -52,47 +51,33 @@ public class Candidate extends AbstractRaftActorBehavior {
 
         peers = context.getPeerAddresses().keySet();
 
-        context.getLogger().debug("Election:Candidate has following peers:"+ peers);
-
-        if(peers.size() > 0) {
-            // Votes are required from a majority of the peers including self.
-            // The votesRequired 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 votesRequired would be for n
-            // peers
-            // 0 peers = 1 votesRequired (0 + 1) / 2 + 1 = 1
-            // 2 peers = 2 votesRequired (2 + 1) / 2 + 1 = 2
-            // 4 peers = 3 votesRequired (4 + 1) / 2 + 1 = 3
-            int noOfPeers = peers.size();
-            int self = 1;
-            votesRequired = (noOfPeers + self) / 2 + 1;
-        } else {
-            votesRequired = 0;
+        if(LOG.isDebugEnabled()) {
+            LOG.debug("{}: Election: Candidate has following peers: {}", context.getId(), peers);
         }
 
+        votesRequired = getMajorityVoteCount(peers.size());
+
         startNewTerm();
         scheduleElection(electionDuration());
     }
 
-    @Override protected RaftState handleAppendEntries(ActorRef sender,
+    @Override protected RaftActorBehavior handleAppendEntries(ActorRef sender,
         AppendEntries appendEntries) {
 
-        context.getLogger().info("Candidate: Received {}", appendEntries.toString());
+        if(LOG.isDebugEnabled()) {
+            LOG.debug("{}: handleAppendEntries: {}", context.getId(), appendEntries);
+        }
 
-        return state();
+        return this;
     }
 
-    @Override protected RaftState handleAppendEntriesReply(ActorRef sender,
+    @Override protected RaftActorBehavior handleAppendEntriesReply(ActorRef sender,
         AppendEntriesReply appendEntriesReply) {
 
-        return state();
+        return this;
     }
 
-    @Override protected RaftState handleRequestVoteReply(ActorRef sender,
+    @Override protected RaftActorBehavior handleRequestVoteReply(ActorRef sender,
         RequestVoteReply requestVoteReply) {
 
         if (requestVoteReply.isVoteGranted()) {
@@ -100,10 +85,10 @@ public class Candidate extends AbstractRaftActorBehavior {
         }
 
         if (voteCount >= votesRequired) {
-            return RaftState.Leader;
+            return switchBehavior(new Leader(context));
         }
 
-        return state();
+        return this;
     }
 
     @Override public RaftState state() {
@@ -111,7 +96,7 @@ public class Candidate extends AbstractRaftActorBehavior {
     }
 
     @Override
-    public RaftState handleMessage(ActorRef sender, Object originalMessage) {
+    public RaftActorBehavior handleMessage(ActorRef sender, Object originalMessage) {
 
         Object message = fromSerializableMessage(originalMessage);
 
@@ -119,14 +104,18 @@ public class Candidate extends AbstractRaftActorBehavior {
 
             RaftRPC rpc = (RaftRPC) message;
 
-            context.getLogger().debug("RaftRPC message received {} my term is {}", rpc.toString(), context.getTermInformation().getCurrentTerm());
+            if(LOG.isDebugEnabled()) {
+                LOG.debug("{}: RaftRPC message received {} my term is {}", context.getId(), rpc,
+                        context.getTermInformation().getCurrentTerm());
+            }
 
             // If RPC request or response contains term T > currentTerm:
             // set currentTerm = T, convert to follower (§5.1)
             // This applies to all RPC messages and responses
             if (rpc.getTerm() > context.getTermInformation().getCurrentTerm()) {
                 context.getTermInformation().updateAndPersist(rpc.getTerm(), null);
-                return RaftState.Follower;
+
+                return switchBehavior(new Follower(context));
             }
         }
 
@@ -137,11 +126,12 @@ public class Candidate extends AbstractRaftActorBehavior {
                 // ourselves the leader. This gives enough time for a leader
                 // who we do not know about (as a peer)
                 // to send a message to the candidate
-                return RaftState.Leader;
+
+                return switchBehavior(new Leader(context));
             }
             startNewTerm();
             scheduleElection(electionDuration());
-            return state();
+            return this;
         }
 
         return super.handleMessage(sender, message);
@@ -159,7 +149,9 @@ public class Candidate extends AbstractRaftActorBehavior {
         context.getTermInformation().updateAndPersist(currentTerm + 1,
             context.getId());
 
-        context.getLogger().debug("Starting new term " + (currentTerm + 1));
+        if(LOG.isDebugEnabled()) {
+            LOG.debug("{}: Starting new term {}", context.getId(), (currentTerm + 1));
+        }
 
         // Request for a vote
         // TODO: Retry request for vote if replies do not arrive in a reasonable