Bug-2397:Provide a mechanism for stakeholders to get notifications on Raft state...

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

diff --git a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/example/ExampleActor.java b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/example/ExampleActor.java
index c4ff108611d9fbdb177f2ef4ace98bb030d69991..6c65021d86158b22483ada73704f68ba9f83d84c 100644 (file)
--- a/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/example/ExampleActor.java
+++ b/opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/example/ExampleActor.java
@@ -13,36 +13,43 @@ import akka.actor.Props;
 import akka.japi.Creator;
 import com.google.common.base.Optional;
 import com.google.protobuf.ByteString;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.HashMap;
+import java.util.Map;
+import org.opendaylight.controller.cluster.DataPersistenceProvider;
 import org.opendaylight.controller.cluster.example.messages.KeyValue;
 import org.opendaylight.controller.cluster.example.messages.KeyValueSaved;
 import org.opendaylight.controller.cluster.example.messages.PrintRole;
 import org.opendaylight.controller.cluster.example.messages.PrintState;
+import org.opendaylight.controller.cluster.notifications.RoleChangeNotifier;
 import org.opendaylight.controller.cluster.raft.ConfigParams;
 import org.opendaylight.controller.cluster.raft.RaftActor;
+import org.opendaylight.controller.cluster.raft.RaftState;
 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
+import org.opendaylight.controller.cluster.raft.behaviors.Leader;
 import org.opendaylight.controller.cluster.raft.protobuff.client.messages.Payload;
 
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.ObjectInputStream;
-import java.io.ObjectOutputStream;
-import java.util.HashMap;
-import java.util.Map;
-
 /**
  * A sample actor showing how the RaftActor is to be extended
  */
 public class ExampleActor extends RaftActor {
 
     private final Map<String, String> state = new HashMap();
+    private final DataPersistenceProvider dataPersistenceProvider;
 
     private long persistIdentifier = 1;
+    private Optional<ActorRef> roleChangeNotifier;
 
 
     public ExampleActor(String id, Map<String, String> peerAddresses,
         Optional<ConfigParams> configParams) {
         super(id, peerAddresses, configParams);
+        this.dataPersistenceProvider = new PersistentDataProvider();
+        roleChangeNotifier = createRoleChangeNotifier(id);
     }
 
     public static Props props(final String id, final Map<String, String> peerAddresses,
@@ -55,7 +62,7 @@ public class ExampleActor extends RaftActor {
         });
     }
 
-    @Override public void onReceiveCommand(Object message){
+    @Override public void onReceiveCommand(Object message) throws Exception{
         if(message instanceof KeyValue){
             if(isLeader()) {
                 String persistId = Long.toString(persistIdentifier++);
@@ -67,19 +74,50 @@ public class ExampleActor extends RaftActor {
             }
 
         } else if (message instanceof PrintState) {
-            LOG.debug("State of the node:{} has entries={}, {}",
-                getId(), state.size(), getReplicatedLogState());
+            if(LOG.isDebugEnabled()) {
+                LOG.debug("State of the node:{} has entries={}, {}",
+                    getId(), state.size(), getReplicatedLogState());
+            }
 
         } else if (message instanceof PrintRole) {
-            LOG.debug("{} = {}, Peers={}", getId(), getRaftState(),getPeers());
+            if(LOG.isDebugEnabled()) {
+                String followers = "";
+                if (getRaftState() == RaftState.Leader || getRaftState() == RaftState.IsolatedLeader) {
+                    followers = ((Leader)this.getCurrentBehavior()).printFollowerStates();
+                    LOG.debug("{} = {}, Peers={}, followers={}", getId(), getRaftState(),
+                        getRaftActorContext().getPeerAddresses().keySet(), followers);
+                } else {
+                    LOG.debug("{} = {}, Peers={}", getId(), getRaftState(),
+                        getRaftActorContext().getPeerAddresses().keySet());
+                }
+
+
+            }
 
         } else {
             super.onReceiveCommand(message);
         }
     }
 
-    @Override protected void applyState(ActorRef clientActor, String identifier,
-        Object data) {
+    protected String getReplicatedLogState() {
+        return "snapshotIndex=" + getRaftActorContext().getReplicatedLog().getSnapshotIndex()
+            + ", snapshotTerm=" + getRaftActorContext().getReplicatedLog().getSnapshotTerm()
+            + ", im-mem journal size=" + getRaftActorContext().getReplicatedLog().size();
+    }
+
+    public Optional<ActorRef> createRoleChangeNotifier(String actorId) {
+        ActorRef exampleRoleChangeNotifier = this.getContext().actorOf(
+            RoleChangeNotifier.getProps(actorId), actorId + "-notifier");
+        return Optional.<ActorRef>of(exampleRoleChangeNotifier);
+    }
+
+    @Override
+    protected Optional<ActorRef> getRoleChangeNotifier() {
+        return roleChangeNotifier;
+    }
+
+    @Override protected void applyState(final ActorRef clientActor, final String identifier,
+        final Object data) {
         if(data instanceof KeyValue){
             KeyValue kv = (KeyValue) data;
             state.put(kv.getKey(), kv.getValue());
@@ -94,7 +132,7 @@ public class ExampleActor extends RaftActor {
         try {
             bs = fromObject(state);
         } catch (Exception e) {
-            LOG.error("Exception in creating snapshot", e);
+            LOG.error(e, "Exception in creating snapshot");
         }
         getSelf().tell(new CaptureSnapshotReply(bs), null);
     }
@@ -104,9 +142,11 @@ public class ExampleActor extends RaftActor {
         try {
             state.putAll((HashMap) toObject(snapshot));
         } catch (Exception e) {
-           LOG.error("Exception in applying snapshot", e);
+           LOG.error(e, "Exception in applying snapshot");
+        }
+        if(LOG.isDebugEnabled()) {
+            LOG.debug("Snapshot applied to state : {}", ((HashMap) state).size());
         }
-        LOG.debug("Snapshot applied to state :" + ((HashMap) state).size());
     }
 
     private ByteString fromObject(Object snapshot) throws Exception {
@@ -152,11 +192,36 @@ public class ExampleActor extends RaftActor {
 
     }
 
-    @Override public void onReceiveRecover(Object message) {
+    @Override
+    protected DataPersistenceProvider persistence() {
+        return dataPersistenceProvider;
+    }
+
+    @Override public void onReceiveRecover(Object message)throws Exception {
         super.onReceiveRecover(message);
     }
 
     @Override public String persistenceId() {
         return getId();
     }
+
+    @Override
+    protected void startLogRecoveryBatch(int maxBatchSize) {
+    }
+
+    @Override
+    protected void appendRecoveredLogEntry(Payload data) {
+    }
+
+    @Override
+    protected void applyCurrentLogRecoveryBatch() {
+    }
+
+    @Override
+    protected void onRecoveryComplete() {
+    }
+
+    @Override
+    protected void applyRecoverySnapshot(ByteString snapshot) {
+    }
 }