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%2FFollowerLogInformationImpl.java;h=a8a33c30b20ef3c95c3f16003e3110e1227fad90;hp=94f9a53a850ae22537fe0607b5a16a1328b12532;hb=95d3c7975a423951dcbdecfbfa4cb6b7a23591cc;hpb=6d73d16b194435ea1ea783a37d1b51fc1f558a1f

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/FollowerLogInformationImpl.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/FollowerLogInformationImpl.java
index 94f9a53a85..a8a33c30b2 100644
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/FollowerLogInformationImpl.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/FollowerLogInformationImpl.java
@@ -8,53 +8,193 @@
 
 package org.opendaylight.controller.cluster.raft;
 
-import java.util.concurrent.atomic.AtomicLong;
+import com.google.common.base.Preconditions;
+import com.google.common.base.Stopwatch;
+import java.util.concurrent.TimeUnit;
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import org.opendaylight.controller.cluster.raft.behaviors.LeaderInstallSnapshotState;
 
-public class FollowerLogInformationImpl implements FollowerLogInformation{
+public class FollowerLogInformationImpl implements FollowerLogInformation {
+    private final Stopwatch stopwatch = Stopwatch.createUnstarted();
 
-    private final String id;
+    private final RaftActorContext context;
 
-    private final AtomicLong nextIndex;
+    private long nextIndex;
 
-    private final AtomicLong matchIndex;
+    private long matchIndex;
 
-    public FollowerLogInformationImpl(String id, AtomicLong nextIndex,
-        AtomicLong matchIndex) {
-        this.id = id;
-        this.nextIndex = nextIndex;
+    private long lastReplicatedIndex = -1L;
+
+    private final Stopwatch lastReplicatedStopwatch = Stopwatch.createUnstarted();
+
+    private short payloadVersion = -1;
+
+    // Assume the HELIUM_VERSION version initially for backwards compatibility until we obtain the follower's
+    // actual version via AppendEntriesReply. Although we no longer support the Helium version, a pre-Boron
+    // follower will not have the version field in AppendEntriesReply so it will be set to 0 which is
+    // HELIUM_VERSION.
+    private short raftVersion = RaftVersions.HELIUM_VERSION;
+
+    private final PeerInfo peerInfo;
+
+    private LeaderInstallSnapshotState installSnapshotState;
+
+    public FollowerLogInformationImpl(PeerInfo peerInfo, long matchIndex, RaftActorContext context) {
+        this.nextIndex = context.getCommitIndex();
         this.matchIndex = matchIndex;
+        this.context = context;
+        this.peerInfo = Preconditions.checkNotNull(peerInfo);
     }
 
-    public long incrNextIndex(){
-        return nextIndex.incrementAndGet();
+    @Override
+    public long incrNextIndex() {
+        return nextIndex++;
     }
 
-    @Override public long decrNextIndex() {
-        return nextIndex.decrementAndGet();
+    @Override
+    public long decrNextIndex() {
+        return nextIndex--;
     }
 
-    @Override public void setNextIndex(long nextIndex) {
-        this.nextIndex.set(nextIndex);
+    @Override
+    public boolean setNextIndex(long nextIndex) {
+        if(this.nextIndex != nextIndex) {
+            this.nextIndex = nextIndex;
+            return true;
+        }
+
+        return false;
     }
 
+    @Override
     public long incrMatchIndex(){
-        return matchIndex.incrementAndGet();
+        return matchIndex++;
     }
 
-    @Override public void setMatchIndex(long matchIndex) {
-        this.matchIndex.set(matchIndex);
+    @Override
+    public boolean setMatchIndex(long matchIndex) {
+        if(this.matchIndex != matchIndex) {
+            this.matchIndex = matchIndex;
+            return true;
+        }
+
+        return false;
     }
 
+    @Override
     public String getId() {
-        return id;
+        return peerInfo.getId();
     }
 
-    public AtomicLong getNextIndex() {
+    @Override
+    public long getNextIndex() {
         return nextIndex;
     }
 
-    public AtomicLong getMatchIndex() {
+    @Override
+    public long getMatchIndex() {
         return matchIndex;
     }
 
+    @Override
+    public boolean isFollowerActive() {
+        if(peerInfo.getVotingState() == VotingState.VOTING_NOT_INITIALIZED) {
+            return false;
+        }
+
+        long elapsed = stopwatch.elapsed(TimeUnit.MILLISECONDS);
+        return (stopwatch.isRunning()) &&
+                (elapsed <= context.getConfigParams().getElectionTimeOutInterval().toMillis());
+    }
+
+    @Override
+    public void markFollowerActive() {
+        if (stopwatch.isRunning()) {
+            stopwatch.reset();
+        }
+        stopwatch.start();
+    }
+
+    @Override
+    public void markFollowerInActive() {
+        if (stopwatch.isRunning()) {
+            stopwatch.stop();
+        }
+    }
+
+    @Override
+    public long timeSinceLastActivity() {
+        return stopwatch.elapsed(TimeUnit.MILLISECONDS);
+    }
+
+    @Override
+    public boolean okToReplicate() {
+        if(peerInfo.getVotingState() == VotingState.VOTING_NOT_INITIALIZED) {
+            return false;
+        }
+
+        // Return false if we are trying to send duplicate data before the heartbeat interval
+        if(getNextIndex() == lastReplicatedIndex){
+            if(lastReplicatedStopwatch.elapsed(TimeUnit.MILLISECONDS) < context.getConfigParams()
+                    .getHeartBeatInterval().toMillis()){
+                return false;
+            }
+        }
+
+        resetLastReplicated();
+        return true;
+    }
+
+    private void resetLastReplicated(){
+        lastReplicatedIndex = getNextIndex();
+        if(lastReplicatedStopwatch.isRunning()){
+            lastReplicatedStopwatch.reset();
+        }
+        lastReplicatedStopwatch.start();
+    }
+
+    @Override
+    public short getPayloadVersion() {
+        return payloadVersion;
+    }
+
+    @Override
+    public void setPayloadVersion(short payloadVersion) {
+        this.payloadVersion = payloadVersion;
+    }
+
+    @Override
+    public short getRaftVersion() {
+        return raftVersion;
+    }
+
+    @Override
+    public void setRaftVersion(short raftVersion) {
+        this.raftVersion = raftVersion;
+    }
+
+    @Override
+    @Nullable
+    public LeaderInstallSnapshotState getInstallSnapshotState() {
+        return installSnapshotState;
+    }
+
+    @Override
+    public void setLeaderInstallSnapshotState(@Nonnull LeaderInstallSnapshotState state) {
+        this.installSnapshotState = Preconditions.checkNotNull(state);
+    }
+
+    @Override
+    public void clearLeaderInstallSnapshotState() {
+        installSnapshotState = null;
+    }
+
+    @Override
+    public String toString() {
+        return "FollowerLogInformationImpl [id=" + getId() + ", nextIndex=" + nextIndex + ", matchIndex=" + matchIndex
+                + ", lastReplicatedIndex=" + lastReplicatedIndex + ", votingState=" + peerInfo.getVotingState()
+                + ", stopwatch=" + stopwatch.elapsed(TimeUnit.MILLISECONDS) + ", followerTimeoutMillis="
+                + context.getConfigParams().getElectionTimeOutInterval().toMillis() + "]";
+    }
 }