BUG-7033: Fix commit exception due to pipe-lining

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / SimpleShardDataTreeCohort.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/SimpleShardDataTreeCohort.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/SimpleShardDataTreeCohort.java
index 71eaf7dbc8613837a69020a108e00f3d1781553e..197c90a60bd62ea15aff24b23b1e17d9a47c5cfa 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/SimpleShardDataTreeCohort.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/SimpleShardDataTreeCohort.java
@@ -13,14 +13,10 @@ import com.google.common.base.Preconditions;
 import com.google.common.base.Verify;
 import com.google.common.primitives.UnsignedLong;
 import com.google.common.util.concurrent.FutureCallback;
-import com.google.common.util.concurrent.Futures;
-import com.google.common.util.concurrent.ListenableFuture;
-import com.google.common.util.concurrent.SettableFuture;
 import java.util.Optional;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeoutException;
 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
-import org.opendaylight.yangtools.concepts.Identifiable;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateTip;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
@@ -28,9 +24,9 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import scala.concurrent.Future;
 
-final class SimpleShardDataTreeCohort extends ShardDataTreeCohort implements Identifiable<TransactionIdentifier> {
+final class SimpleShardDataTreeCohort extends ShardDataTreeCohort {
     private static final Logger LOG = LoggerFactory.getLogger(SimpleShardDataTreeCohort.class);
-    private static final ListenableFuture<Void> VOID_FUTURE = Futures.immediateFuture(null);
+
     private final DataTreeModification transaction;
     private final ShardDataTree dataTree;
     private final TransactionIdentifier transactionId;
@@ -60,7 +56,6 @@ final class SimpleShardDataTreeCohort extends ShardDataTreeCohort implements Ide
     }
 
     @Override
-
     DataTreeModification getDataTreeModification() {
         return transaction;
     }
@@ -95,33 +90,37 @@ final class SimpleShardDataTreeCohort extends ShardDataTreeCohort implements Ide
     }
 
     @Override
-    public ListenableFuture<Void> abort() {
-        dataTree.startAbort(this);
+    public void abort(final FutureCallback<Void> abortCallback) {
+        if (!dataTree.startAbort(this)) {
+            abortCallback.onSuccess(null);
+            return;
+        }
+
+        candidate = null;
         state = State.ABORTED;
 
         final Optional<Future<Iterable<Object>>> maybeAborts = userCohorts.abort();
         if (!maybeAborts.isPresent()) {
-            return VOID_FUTURE;
+            abortCallback.onSuccess(null);
+            return;
         }
 
         final Future<Iterable<Object>> aborts = maybeAborts.get();
         if (aborts.isCompleted()) {
-            return VOID_FUTURE;
+            abortCallback.onSuccess(null);
+            return;
         }
 
-        final SettableFuture<Void> ret = SettableFuture.create();
         aborts.onComplete(new OnComplete<Iterable<Object>>() {
             @Override
             public void onComplete(final Throwable failure, final Iterable<Object> objs) {
                 if (failure != null) {
-                    ret.setException(failure);
+                    abortCallback.onFailure(failure);
                 } else {
-                    ret.set(null);
+                    abortCallback.onSuccess(null);
                 }
             }
         }, ExecutionContexts.global());
-
-        return ret;
     }
 
     @Override
@@ -129,7 +128,12 @@ final class SimpleShardDataTreeCohort extends ShardDataTreeCohort implements Ide
         checkState(State.PRE_COMMIT_COMPLETE);
         this.callback = Preconditions.checkNotNull(newCallback);
         state = State.COMMIT_PENDING;
-        dataTree.startCommit(this, candidate);
+
+        if (nextFailure == null) {
+            dataTree.startCommit(this, candidate);
+        } else {
+            failedCommit(nextFailure);
+        }
     }
 
     private <T> FutureCallback<T> switchState(final State newState) {
@@ -141,6 +145,11 @@ final class SimpleShardDataTreeCohort extends ShardDataTreeCohort implements Ide
         return ret;
     }
 
+    void setNewCandidate(DataTreeCandidateTip dataTreeCandidate) {
+        checkState(State.PRE_COMMIT_COMPLETE);
+        this.candidate = Verify.verifyNotNull(dataTreeCandidate);
+    }
+
     void successfulCanCommit() {
         switchState(State.CAN_COMMIT_COMPLETE).onSuccess(null);
     }
@@ -159,6 +168,7 @@ final class SimpleShardDataTreeCohort extends ShardDataTreeCohort implements Ide
      */
     // FIXME: this should be asynchronous
     void userPreCommit(final DataTreeCandidate dataTreeCandidate) throws ExecutionException, TimeoutException {
+        userCohorts.reset();
         userCohorts.canCommit(dataTreeCandidate);
         userCohorts.preCommit();
     }
@@ -202,6 +212,12 @@ final class SimpleShardDataTreeCohort extends ShardDataTreeCohort implements Ide
         switchState(State.FAILED).onFailure(cause);
     }
 
+    void finishCommitPending() {
+        checkState(State.COMMIT_PENDING);
+        // We want to switch the state but keep the callback.
+        callback = switchState(State.FINISH_COMMIT_PENDING);
+    }
+
     @Override
     public State getState() {
         return state;