Simplify code using Java 8 features

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

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DefaultShardDataTreeChangeListenerPublisher.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DefaultShardDataTreeChangeListenerPublisher.java
index 217ffd358c5358fa3f7a883d04d4d014f6c0eeee..b71174d0b3efbb007810c58b5c3a5df1cce6b234 100644 (file)
--- a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DefaultShardDataTreeChangeListenerPublisher.java
+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DefaultShardDataTreeChangeListenerPublisher.java
@@ -7,17 +7,16 @@
  */
 package org.opendaylight.controller.cluster.datastore;
 
-import com.google.common.base.Stopwatch;
+import com.google.common.base.Optional;
 import java.util.Collection;
-import java.util.Collections;
-import java.util.concurrent.TimeUnit;
+import java.util.function.Consumer;
 import javax.annotation.concurrent.NotThreadSafe;
-import org.opendaylight.controller.md.sal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
-import org.opendaylight.controller.sal.core.spi.data.AbstractDOMStoreTreeChangePublisher;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeChangeListener;
+import org.opendaylight.mdsal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
+import org.opendaylight.mdsal.dom.spi.store.AbstractDOMStoreTreeChangePublisher;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -31,47 +30,58 @@ import org.slf4j.LoggerFactory;
 final class DefaultShardDataTreeChangeListenerPublisher extends AbstractDOMStoreTreeChangePublisher
         implements ShardDataTreeChangeListenerPublisher {
     private static final Logger LOG = LoggerFactory.getLogger(DefaultShardDataTreeChangeListenerPublisher.class);
+    private String logContext;
 
-    private final Stopwatch timer = Stopwatch.createUnstarted();
+    DefaultShardDataTreeChangeListenerPublisher(String logContext) {
+        this.logContext = logContext;
+    }
 
     @Override
-    public void publishChanges(final DataTreeCandidate candidate, String logContext) {
-        timer.start();
+    public void publishChanges(final DataTreeCandidate candidate) {
+        if (LOG.isTraceEnabled()) {
+            LOG.trace("{}: publishChanges: {}", logContext, candidate);
+        } else {
+            LOG.debug("{}: publishChanges: rootPath: {}", logContext, candidate.getRootPath());
+        }
 
-        try {
-            processCandidateTree(candidate);
-        } finally {
-            timer.stop();
-            long elapsedTime = timer.elapsed(TimeUnit.MILLISECONDS);
-            if(elapsedTime >= PUBLISH_DELAY_THRESHOLD_IN_MS) {
-                LOG.warn("{}: Generation of DataTreeCandidateNode events took longer than expected. Elapsed time: {}",
-                        logContext, timer);
-            } else {
-                LOG.debug("{}: Elapsed time for generation of DataTreeCandidateNode events: {}", logContext, timer);
-            }
+        processCandidateTree(candidate);
+    }
 
-            timer.reset();
-        }
+    @Override
+    protected void notifyListener(AbstractDOMDataTreeChangeListenerRegistration<?> registration,
+            Collection<DataTreeCandidate> changes) {
+        LOG.debug("{}: notifyListener: listener: {}", logContext, registration.getInstance());
+        registration.getInstance().onDataTreeChanged(changes);
     }
 
     @Override
-    public ShardDataTreeChangeListenerPublisher newInstance() {
-        return new DefaultShardDataTreeChangeListenerPublisher();
+    protected void registrationRemoved(final AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
+        LOG.debug("Registration {} removed", registration);
     }
 
     @Override
-    protected void notifyListeners(final Collection<AbstractDOMDataTreeChangeListenerRegistration<?>> registrations,
-            final YangInstanceIdentifier path, final DataTreeCandidateNode node) {
-        final Collection<DataTreeCandidate> changes = Collections.<DataTreeCandidate>singleton(
-                DataTreeCandidates.newDataTreeCandidate(path, node));
+    public void registerTreeChangeListener(YangInstanceIdentifier treeId, DOMDataTreeChangeListener listener,
+            Optional<DataTreeCandidate> initialState,
+            Consumer<ListenerRegistration<DOMDataTreeChangeListener>> onRegistration) {
+        LOG.debug("{}: registerTreeChangeListener: path: {}, listener: {}", logContext, treeId, listener);
+
+        AbstractDOMDataTreeChangeListenerRegistration<DOMDataTreeChangeListener> registration =
+                super.registerTreeChangeListener(treeId, listener);
+
+        onRegistration.accept(registration);
 
-        for (AbstractDOMDataTreeChangeListenerRegistration<?> reg : registrations) {
-            reg.getInstance().onDataTreeChanged(changes);
+        if (initialState.isPresent()) {
+            notifySingleListener(treeId, listener, initialState.get(), logContext);
         }
     }
 
-    @Override
-    protected void registrationRemoved(final AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
-        LOG.debug("Registration {} removed", registration);
+    static void notifySingleListener(YangInstanceIdentifier treeId, DOMDataTreeChangeListener listener,
+            DataTreeCandidate state, String logContext) {
+        LOG.debug("{}: notifySingleListener: path: {}, listener: {}", logContext, treeId, listener);
+        DefaultShardDataTreeChangeListenerPublisher publisher =
+                new DefaultShardDataTreeChangeListenerPublisher(logContext);
+        publisher.logContext = logContext;
+        publisher.registerTreeChangeListener(treeId, listener, Optional.absent(), noop -> { /* NOOP */ });
+        publisher.publishChanges(state);
     }
 }