/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.map.impl.querycache.publisher;
import com.hazelcast.map.impl.querycache.QueryCacheContext;
import com.hazelcast.map.impl.querycache.Registry;
import com.hazelcast.util.ConcurrencyUtil;
import com.hazelcast.util.ConstructorFunction;
import java.util.Collections;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
/**
* Holds {@link QueryCacheListenerRegistry} for each {@code IMap}.
*
* @see QueryCacheListenerRegistry
*/
public class MapListenerRegistry implements Registry<String, QueryCacheListenerRegistry> {
private ConstructorFunction<String, QueryCacheListenerRegistry> registryConstructorFunction =
new ConstructorFunction<String, QueryCacheListenerRegistry>() {
@Override
public QueryCacheListenerRegistry createNew(String mapName) {
return new QueryCacheListenerRegistry(context, mapName);
}
};
private final QueryCacheContext context;
private final ConcurrentMap<String, QueryCacheListenerRegistry> listeners;
public MapListenerRegistry(QueryCacheContext context) {
this.listeners = new ConcurrentHashMap<String, QueryCacheListenerRegistry>();
this.context = context;
}
@Override
public QueryCacheListenerRegistry getOrCreate(String mapName) {
return ConcurrencyUtil.getOrPutIfAbsent(listeners, mapName, registryConstructorFunction);
}
@Override
public QueryCacheListenerRegistry getOrNull(String mapName) {
return listeners.get(mapName);
}
@Override
public Map<String, QueryCacheListenerRegistry> getAll() {
return Collections.unmodifiableMap(listeners);
}
@Override
public QueryCacheListenerRegistry remove(String id) {
return listeners.remove(id);
}
}