/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.brooklyn.core.mgmt.rebind;
import java.util.Collection;
import java.util.Map;
import org.apache.brooklyn.core.location.internal.LocationInternal;
import org.apache.brooklyn.core.objs.BrooklynObjectInternal;
import org.apache.brooklyn.api.catalog.CatalogItem;
import org.apache.brooklyn.api.entity.Entity;
import org.apache.brooklyn.api.location.Location;
import org.apache.brooklyn.api.mgmt.rebind.ChangeListener;
import org.apache.brooklyn.api.mgmt.rebind.PersistenceExceptionHandler;
import org.apache.brooklyn.api.mgmt.rebind.mementos.BrooklynMementoPersister;
import org.apache.brooklyn.api.mgmt.rebind.mementos.CatalogItemMemento;
import org.apache.brooklyn.api.mgmt.rebind.mementos.EnricherMemento;
import org.apache.brooklyn.api.mgmt.rebind.mementos.EntityMemento;
import org.apache.brooklyn.api.mgmt.rebind.mementos.LocationMemento;
import org.apache.brooklyn.api.mgmt.rebind.mementos.Memento;
import org.apache.brooklyn.api.mgmt.rebind.mementos.PolicyMemento;
import org.apache.brooklyn.api.objs.BrooklynObject;
import org.apache.brooklyn.api.policy.Policy;
import org.apache.brooklyn.api.sensor.Enricher;
import com.google.common.collect.Maps;
/**
* Persists changes immediately. This can cause massive CPU load if entities etc are changing frequently
* (for any serializing / file-based persister implementation).
*
* @author aled
*
* @deprecated since 0.7; unused code
*/
@Deprecated
public class ImmediateDeltaChangeListener implements ChangeListener {
private final BrooklynMementoPersister persister;
private final PersistenceExceptionHandler exceptionHandler;
private volatile boolean running = true;
public ImmediateDeltaChangeListener(BrooklynMementoPersister persister) {
this.persister = persister;
exceptionHandler = PersistenceExceptionHandlerImpl.builder()
.build();
}
@Override
public void onManaged(BrooklynObject instance) {
onChanged(instance);
}
@Override
public void onUnmanaged(BrooklynObject instance) {
if (running && persister != null) {
PersisterDeltaImpl delta = new PersisterDeltaImpl();
if (instance instanceof Entity) {
delta.removedEntityIds.add(instance.getId());
} else if (instance instanceof Location) {
delta.removedLocationIds.add(instance.getId());
} else if (instance instanceof Policy) {
delta.removedPolicyIds.add(instance.getId());
} else if (instance instanceof Enricher) {
delta.removedEnricherIds.add(instance.getId());
} else if (instance instanceof CatalogItem) {
delta.removedCatalogItemIds.add(instance.getId());
} else {
throw new IllegalStateException("Unexpected brooklyn type: "+instance);
}
persister.delta(delta, exceptionHandler);
}
}
@Override
public void onChanged(BrooklynObject instance) {
if (running && persister != null) {
PersisterDeltaImpl delta = new PersisterDeltaImpl();
Memento memento = ((BrooklynObjectInternal)instance).getRebindSupport().getMemento();
if (instance instanceof Entity) {
delta.entities.add((EntityMemento) memento);
addEntityAdjuncts((Entity)instance, delta);
} else if (instance instanceof Location) {
delta.locations.add((LocationMemento) memento);
} else if (instance instanceof Policy) {
delta.policies.add((PolicyMemento) memento);
} else if (instance instanceof Enricher) {
delta.enrichers.add((EnricherMemento) memento);
} else if (instance instanceof CatalogItem) {
delta.catalogItems.add((CatalogItemMemento) instance);
} else {
throw new IllegalStateException("Unexpected brooklyn type: "+instance);
}
persister.delta(delta, exceptionHandler);
}
}
private void addEntityAdjuncts(Entity entity, PersisterDeltaImpl delta) {
// FIXME How to let the policy/location tell us about changes?
// Don't do this every time!
Map<String, LocationMemento> locations = Maps.newLinkedHashMap();
for (Location location : entity.getLocations()) {
if (!locations.containsKey(location.getId())) {
Collection<Location> locsInHierachy = TreeUtils.findLocationsInHierarchy(location);
/*
* Need to guarantee "happens before", with any thread that has written
* fields of these locations. In particular, saw failures where SshMachineLocation
* had null address field. Our hypothesis is that the location had its fields set,
* and then set its parent (which goes through a synchronized in AbstractLocation.addChild),
* but that this memento-generating code did not go through any synchronization or volatiles.
*/
synchronized (new Object()) {}
for (Location locInHierarchy : locsInHierachy) {
locations.put(locInHierarchy.getId(), ((LocationInternal)locInHierarchy).getRebindSupport().getMemento());
}
}
}
delta.locations = locations.values();
// FIXME Not including policies, because lots of places regiser anonymous inner class policies
// (e.g. AbstractController registering a AbstractMembershipTrackingPolicy)
// Also, the entity constructor often re-creates the policy.
// Also see MementosGenerator.newEntityMementoBuilder()
// List<PolicyMemento> policies = Lists.newArrayList();
// for (Policy policy : entity.getPolicies()) {
// policies.add(policy.getRebindSupport().getMemento());
// }
// delta.policies = policies;
/*
* Make the writes to the mementos visible to other threads.
*/
synchronized (new Object()) {}
}
}