/*
*
* * Copyright 2014 Orient Technologies LTD (info(at)orientechnologies.com)
* *
* * 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.
* *
* * For more information: http://www.orientechnologies.com
*
*/
package com.orientechnologies.orient.graph.gremlin;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import com.tinkerpop.blueprints.impls.orient.OrientBaseGraph;
import com.tinkerpop.gremlin.groovy.jsr223.GremlinGroovyScriptEngine;
public class OGremlinEngineThreadLocal extends ThreadLocal<ScriptEngine> {
public static OGremlinEngineThreadLocal INSTANCE = new OGremlinEngineThreadLocal();
public ScriptEngine get(final OrientBaseGraph iGraph) {
ScriptEngine engine = super.get();
if (engine != null) {
final OrientBaseGraph currGraph = (OrientBaseGraph) engine.getBindings(ScriptContext.ENGINE_SCOPE).get("g");
if (currGraph == iGraph || (currGraph != null && currGraph.getRawGraph().getURL().equals(iGraph.getRawGraph().getURL())))
// REUSE IT
return engine;
}
// CREATE A NEW ONE
engine = new GremlinGroovyScriptEngine();
engine.getBindings(ScriptContext.ENGINE_SCOPE).put("g", iGraph);
set(engine);
return engine;
}
public ScriptEngine getIfDefined() {
return super.get();
}
public boolean isDefined() {
return super.get() != null;
}
}