Renaming openecomp to onap

[aai/champ.git] / src / main / java / org / onap / aai / champ / graph / impl / ChampAPIImpl.java

diff --git a/src/main/java/org/onap/aai/champ/graph/impl/ChampAPIImpl.java b/src/main/java/org/onap/aai/champ/graph/impl/ChampAPIImpl.java
new file mode 100644 (file)
index 0000000..ed06429
--- /dev/null
+++ b/src/main/java/org/onap/aai/champ/graph/impl/ChampAPIImpl.java
@@ -0,0 +1,87 @@
+/**
+ * ============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;
+       }
+
+}