--- /dev/null
+/*
+ * Copyright (c) 2015 Ericsson India Global Services Pvt Ltd. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.vpnservice.datastoreutils;
+
+import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
+import org.opendaylight.controller.md.sal.binding.api.*;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.Callable;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+public abstract class AsyncClusteredDataChangeListenerBase<T extends DataObject, K extends ClusteredDataChangeListener> implements ClusteredDataChangeListener, AutoCloseable {
+ private static final Logger LOG = LoggerFactory.getLogger(AsyncClusteredDataChangeListenerBase.class);
+
+ private static final int DATATREE_CHANGE_HANDLER_THREAD_POOL_CORE_SIZE = 1;
+ private static final int DATATREE_CHANGE_HANDLER_THREAD_POOL_MAX_SIZE = 1;
+ private static final int DATATREE_CHANGE_HANDLER_THREAD_POOL_KEEP_ALIVE_TIME_SECS = 300;
+ private static final int STARTUP_LOOP_TICK = 500;
+ private static final int STARTUP_LOOP_MAX_RETRIES = 8;
+
+ private static ThreadPoolExecutor dataChangeHandlerExecutor = new ThreadPoolExecutor(
+ DATATREE_CHANGE_HANDLER_THREAD_POOL_CORE_SIZE,
+ DATATREE_CHANGE_HANDLER_THREAD_POOL_MAX_SIZE,
+ DATATREE_CHANGE_HANDLER_THREAD_POOL_KEEP_ALIVE_TIME_SECS,
+ TimeUnit.SECONDS,
+ new LinkedBlockingQueue<Runnable>());
+
+ private ListenerRegistration<K> listenerRegistration;
+ protected final Class<T> clazz;
+ private final Class<K> eventClazz;
+
+ /**
+ * @param clazz - for which the data change event is received
+ */
+ public AsyncClusteredDataChangeListenerBase(Class<T> clazz, Class<K> eventClazz) {
+ this.clazz = Preconditions.checkNotNull(clazz, "Class can not be null!");
+ this.eventClazz = Preconditions.checkNotNull(eventClazz, "eventClazz can not be null!");
+ }
+
+ public void registerListener(final LogicalDatastoreType dsType, final DataBroker db) {
+ try {
+ TaskRetryLooper looper = new TaskRetryLooper(STARTUP_LOOP_TICK, STARTUP_LOOP_MAX_RETRIES);
+ listenerRegistration = looper.loopUntilNoException(new Callable<ListenerRegistration<K>>() {
+ @Override
+ public ListenerRegistration call() throws Exception {
+ return db.registerDataChangeListener(dsType, getWildCardPath(), getDataChangeListener(), getDataChangeScope());
+ }
+ });
+ } catch (final Exception e) {
+ LOG.warn("{}: Data Tree Change listener registration failed.", eventClazz.getName());
+ LOG.debug("{}: Data Tree Change listener registration failed: {}", eventClazz.getName(), e);
+ throw new IllegalStateException( eventClazz.getName() + "{}startup failed. System needs restart.", e);
+ }
+ }
+
+ @Override
+ public void onDataChanged(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
+ if (changeEvent == null) {
+ return;
+ }
+
+ DataChangeHandler dataChangeHandler = new DataChangeHandler(changeEvent);
+ dataChangeHandlerExecutor.execute(dataChangeHandler);
+ }
+
+ @SuppressWarnings("unchecked")
+ private void createData(final Map<InstanceIdentifier<?>, DataObject> createdData) {
+ final Set<InstanceIdentifier<?>> keys = createdData.keySet() != null
+ ? createdData.keySet() : Collections.<InstanceIdentifier<?>>emptySet();
+ for (InstanceIdentifier<?> key : keys) {
+ if (clazz.equals(key.getTargetType())) {
+ InstanceIdentifier<T> createKeyIdent = key.firstIdentifierOf(clazz);
+ final Optional<DataObject> value = Optional.of(createdData.get(key));
+ if (value.isPresent()) {
+ this.add(createKeyIdent, (T)value.get());
+ }
+ }
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ private void updateData(final Map<InstanceIdentifier<?>, DataObject> updateData,
+ final Map<InstanceIdentifier<?>, DataObject> originalData) {
+
+ final Set<InstanceIdentifier<?>> keys = updateData.keySet() != null
+ ? updateData.keySet() : Collections.<InstanceIdentifier<?>>emptySet();
+ for (InstanceIdentifier<?> key : keys) {
+ if (clazz.equals(key.getTargetType())) {
+ InstanceIdentifier<T> updateKeyIdent = key.firstIdentifierOf(clazz);
+ final Optional<DataObject> value = Optional.of(updateData.get(key));
+ final Optional<DataObject> original = Optional.of(originalData.get(key));
+ if (value.isPresent() && original.isPresent()) {
+ this.update(updateKeyIdent, (T) original.get(), (T) value.get());
+ }
+ }
+ }
+ }
+
+ @SuppressWarnings("unchecked")
+ private void removeData(final Set<InstanceIdentifier<?>> removeData,
+ final Map<InstanceIdentifier<?>, DataObject> originalData) {
+
+ for (InstanceIdentifier<?> key : removeData) {
+ if (clazz.equals(key.getTargetType())) {
+ final InstanceIdentifier<T> ident = key.firstIdentifierOf(clazz);
+ final DataObject removeValue = originalData.get(key);
+ this.remove(ident, (T)removeValue);
+ }
+ }
+ }
+
+ @Override
+ public void close() throws Exception {
+ if (listenerRegistration != null) {
+ try {
+ listenerRegistration.close();
+ } catch (final Exception e) {
+ LOG.error("Error when cleaning up ClusteredDataChangeListener.", e);
+ }
+ listenerRegistration = null;
+ }
+ LOG.info("Interface Manager Closed");
+ }
+
+ protected abstract void remove(InstanceIdentifier<T> identifier, T del);
+
+ protected abstract void update(InstanceIdentifier<T> identifier, T original, T update);
+
+ protected abstract void add(InstanceIdentifier<T> identifier, T add);
+
+ protected abstract InstanceIdentifier<T> getWildCardPath();
+
+ protected abstract ClusteredDataChangeListener getDataChangeListener();
+
+ protected abstract AsyncDataBroker.DataChangeScope getDataChangeScope();
+
+ public class DataChangeHandler implements Runnable {
+ final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent;
+
+ public DataChangeHandler(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changeEvent) {
+ this.changeEvent = changeEvent;
+ }
+
+ @Override
+ public void run() {
+ Preconditions.checkNotNull(changeEvent,"Async ChangeEvent can not be null!");
+
+ /* All DataObjects for create */
+ final Map<InstanceIdentifier<?>, DataObject> createdData = changeEvent.getCreatedData() != null
+ ? changeEvent.getCreatedData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
+ /* All DataObjects for remove */
+ final Set<InstanceIdentifier<?>> removeData = changeEvent.getRemovedPaths() != null
+ ? changeEvent.getRemovedPaths() : Collections.<InstanceIdentifier<?>>emptySet();
+ /* All DataObjects for updates */
+ final Map<InstanceIdentifier<?>, DataObject> updateData = changeEvent.getUpdatedData() != null
+ ? changeEvent.getUpdatedData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
+ /* All Original DataObjects */
+ final Map<InstanceIdentifier<?>, DataObject> originalData = changeEvent.getOriginalData() != null
+ ? changeEvent.getOriginalData() : Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
+
+ createData(createdData);
+ updateData(updateData, originalData);
+ removeData(removeData, originalData);
+ }
+ }
+}
Code Review / vpnservice.git / commitdiff