/*
* 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
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*/
package org.apache.brooklyn.core.relations;
import java.util.Collection;
import java.util.Map;
import java.util.Set;
import org.apache.brooklyn.api.objs.BrooklynObject;
import org.apache.brooklyn.api.objs.BrooklynObject.RelationSupport;
import org.apache.brooklyn.api.relations.RelationshipType;
import org.apache.brooklyn.util.collections.MutableMap;
import org.apache.brooklyn.util.collections.MutableSet;
import com.google.common.base.Supplier;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multimaps;
public class ByObjectBasicRelationSupport<SourceType extends BrooklynObject> extends AbstractBasicRelationSupport<SourceType> {
DataForBasicRelations<SourceType> data;
public ByObjectBasicRelationSupport(SourceType source, Runnable relationChangeCallback) {
super(source);
data = new DataForBasicRelations<SourceType>(relationChangeCallback);
}
@Override
public RelationSupport<SourceType> getLocalBackingStore() {
return data;
}
public static class DataForBasicRelations<T extends BrooklynObject> implements RelationSupport<T> {
Runnable relationChangeCallback;
public DataForBasicRelations(Runnable relationChangeCallback) {
this.relationChangeCallback = relationChangeCallback;
}
// TODO for now, relationships are stored here (and persisted); ideally we'd look them up in catalog
private Map<String,RelationshipType<? super T,? extends BrooklynObject>> relationshipTypes = MutableMap.of();
private Multimap<String,BrooklynObject> relations = Multimaps.newMultimap(MutableMap.<String,Collection<BrooklynObject>>of(),
new Supplier<Collection<BrooklynObject>>() {
public Collection<BrooklynObject> get() {
return MutableSet.of();
}
});
public Set<RelationshipType<? super T,? extends BrooklynObject>> getRelationshipTypes() {
synchronized (relations) {
return MutableSet.copyOf(relationshipTypes.values());
}
}
@SuppressWarnings("unchecked") @Override
public <U extends BrooklynObject> Set<U> getRelations(RelationshipType<? super T, U> relationship) {
synchronized (relations) {
return (Set<U>)MutableSet.copyOf(relations.get(relationship.getRelationshipTypeName()));
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
@Override
public <U extends BrooklynObject> void add(RelationshipType<? super T,? super U> relationship, U target) {
synchronized (relations) {
relationshipTypes.put(relationship.getRelationshipTypeName(), (RelationshipType)relationship);
relations.put(relationship.getRelationshipTypeName(), target);
}
onRelationsChanged();
}
@Override
public <U extends BrooklynObject> void remove(RelationshipType<? super T,? super U> relationship, U target) {
synchronized (relations) {
relations.remove(relationship.getRelationshipTypeName(), target);
}
onRelationsChanged();
}
protected void onRelationsChanged() {
if (relationChangeCallback!=null) relationChangeCallback.run();
}
}
}