Merge "Removing { } from NormalizedNodeJsonBodyWriter"

[controller.git] / opendaylight / md-sal / sal-akka-raft / src / main / java / org / opendaylight / controller / cluster / raft / behaviors / Candidate.java

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 4a3e2c5d664406844edaddee6308abf112b0f79c..b36c41abf262b8c24d05f354091f7c4ec92a0827 100644 (file)
--- 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/>
@@ -48,33 +47,15 @@ public class Candidate extends AbstractRaftActorBehavior {
     private final Set<String> peers;
 
     public Candidate(RaftActorContext context) {
-        super(context);
+        super(context, RaftState.Candidate);
 
         peers = context.getPeerAddresses().keySet();
 
         if(LOG.isDebugEnabled()) {
-            LOG.debug("Election:Candidate has following peers: {}", peers);
+            LOG.debug("{}: Election: Candidate has following peers: {}", logName(), 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;
-        }
+        votesRequired = getMajorityVoteCount(peers.size());
 
         startNewTerm();
         scheduleElection(electionDuration());
@@ -84,7 +65,7 @@ public class Candidate extends AbstractRaftActorBehavior {
         AppendEntries appendEntries) {
 
         if(LOG.isDebugEnabled()) {
-            LOG.debug(appendEntries.toString());
+            LOG.debug("{}: handleAppendEntries: {}", logName(), appendEntries);
         }
 
         return this;
@@ -97,7 +78,10 @@ public class Candidate extends AbstractRaftActorBehavior {
     }
 
     @Override protected RaftActorBehavior handleRequestVoteReply(ActorRef sender,
-        RequestVoteReply requestVoteReply) {
+            RequestVoteReply requestVoteReply) {
+
+        LOG.debug("{}: handleRequestVoteReply: {}, current voteCount: {}", logName(), requestVoteReply,
+                voteCount);
 
         if (requestVoteReply.isVoteGranted()) {
             voteCount++;
@@ -110,10 +94,6 @@ public class Candidate extends AbstractRaftActorBehavior {
         return this;
     }
 
-    @Override public RaftState state() {
-        return RaftState.Candidate;
-    }
-
     @Override
     public RaftActorBehavior handleMessage(ActorRef sender, Object originalMessage) {
 
@@ -124,7 +104,8 @@ public class Candidate extends AbstractRaftActorBehavior {
             RaftRPC rpc = (RaftRPC) message;
 
             if(LOG.isDebugEnabled()) {
-                LOG.debug("RaftRPC message received {} my term is {}", rpc, context.getTermInformation().getCurrentTerm());
+                LOG.debug("{}: RaftRPC message received {}, my term is {}", logName(), rpc,
+                        context.getTermInformation().getCurrentTerm());
             }
 
             // If RPC request or response contains term T > currentTerm:
@@ -138,6 +119,8 @@ public class Candidate extends AbstractRaftActorBehavior {
         }
 
         if (message instanceof ElectionTimeout) {
+            LOG.debug("{}: Received ElectionTimeout", logName());
+
             if (votesRequired == 0) {
                 // If there are no peers then we should be a Leader
                 // We wait for the election timeout to occur before declare
@@ -164,12 +147,10 @@ public class Candidate extends AbstractRaftActorBehavior {
 
         // Increment the election term and vote for self
         long currentTerm = context.getTermInformation().getCurrentTerm();
-        context.getTermInformation().updateAndPersist(currentTerm + 1,
-            context.getId());
+        long newTerm = currentTerm + 1;
+        context.getTermInformation().updateAndPersist(newTerm, context.getId());
 
-        if(LOG.isDebugEnabled()) {
-            LOG.debug("Starting new term {}", (currentTerm + 1));
-        }
+        LOG.debug("{}: Starting new term {}", logName(), newTerm);
 
         // Request for a vote
         // TODO: Retry request for vote if replies do not arrive in a reasonable
@@ -177,17 +158,17 @@ public class Candidate extends AbstractRaftActorBehavior {
         for (String peerId : peers) {
             ActorSelection peerActor = context.getPeerActorSelection(peerId);
             if(peerActor != null) {
-                peerActor.tell(new RequestVote(
+                RequestVote requestVote = new RequestVote(
                         context.getTermInformation().getCurrentTerm(),
                         context.getId(),
                         context.getReplicatedLog().lastIndex(),
-                        context.getReplicatedLog().lastTerm()),
-                    context.getActor()
-                );
-            }
-        }
+                        context.getReplicatedLog().lastTerm());
 
+                LOG.debug("{}: Sending {} to peer {}", logName(), requestVote, peerId);
 
+                peerActor.tell(requestVote, context.getActor());
+            }
+        }
     }
 
     @Override public void close() throws Exception {