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/**
* ============LICENSE_START==========================================
* org.onap.aai
* ===================================================================
* Copyright © 2017 AT&T Intellectual Property. All rights reserved.
* Copyright © 2017 Amdocs
* ===================================================================
* 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.
* ============LICENSE_END============================================
* ECOMP is a trademark and service mark of AT&T Intellectual Property.
*/
package org.onap.aai.champ.graph.impl;
import java.util.Map.Entry;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicBoolean;
import org.onap.aai.champ.ChampAPI;
import org.onap.aai.champ.ChampGraph;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class ChampAPIImpl implements ChampAPI {
private static final Logger LOGGER = LoggerFactory.getLogger(ChampAPIImpl.class);
private final AtomicBoolean shutdown;
private final ChampGraph.Type type;
private final ConcurrentHashMap<String, ChampGraph> graphs;
public ChampAPIImpl(ChampGraph.Type type) {
this.type = type;
this.graphs = new ConcurrentHashMap<String, ChampGraph> ();
this.shutdown = new AtomicBoolean(false);
}
private ConcurrentHashMap<String, ChampGraph> getGraphs() {
return graphs;
}
@Override
public ChampGraph getGraph(String graphName) {
if (shutdown.get()) throw new IllegalStateException("Cannot call getGraph() after shutdown() has been initiated");
if (getGraphs().containsKey(graphName)) return getGraphs().get(graphName);
final ChampGraph graph = ChampGraph.Factory.newInstance(type, graphName);
final ChampGraph existingGraph = getGraphs().putIfAbsent(graphName, graph);
if (existingGraph == null) return graph;
return existingGraph;
}
@Override
public void shutdown() {
if (shutdown.compareAndSet(false, true)) {
for (Entry<String, ChampGraph> graphEntry : graphs.entrySet()) {
LOGGER.info("Shutting down graph {}", graphEntry.getKey());
try {
graphEntry.getValue().shutdown();
LOGGER.info("Graph {} shutdown successfully", graphEntry.getKey());
} catch (Throwable t) {
LOGGER.warn("Caught exception while shutting down graph " + graphEntry.getKey(), t);
}
}
}
}
@Override
public ChampGraph.Type getType() {
return type;
}
}
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