2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
20 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
22 package org.onap.aai.restcore.search;
24 import java.util.HashMap;
26 import java.util.concurrent.TimeUnit;
28 import org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.GraphTraversal;
29 import org.codehaus.groovy.ast.ClassHelper;
30 import org.codehaus.groovy.ast.expr.ClassExpression;
31 import org.codehaus.groovy.ast.expr.PropertyExpression;
32 import org.codehaus.groovy.control.CompilerConfiguration;
33 import org.codehaus.groovy.control.customizers.ASTTransformationCustomizer;
34 import org.codehaus.groovy.control.customizers.ImportCustomizer;
36 import groovy.lang.Binding;
37 import groovy.lang.GroovyShell;
38 import groovy.lang.Script;
39 import groovy.transform.TimedInterrupt;
42 * Creates and returns a groovy shell with the
43 * configuration to statically import graph classes
46 public class GremlinGroovyShellSingleton {
48 private final GroovyShell shell;
49 private GremlinGroovyShellSingleton() {
50 Map<String, Object> parameters = new HashMap<>();
51 parameters.put("value", 30000);
52 parameters.put("unit", new PropertyExpression(new ClassExpression(ClassHelper.make(TimeUnit.class)),"MILLISECONDS"));
54 ASTTransformationCustomizer custom = new ASTTransformationCustomizer(parameters, TimedInterrupt.class);
55 ImportCustomizer imports = new ImportCustomizer();
56 imports.addStaticStars(
57 "org.apache.tinkerpop.gremlin.process.traversal.P"
60 "org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__",
61 "org.apache.tinkerpop.gremlin.structure.T",
62 "org.apache.tinkerpop.gremlin.process.traversal.P",
63 "java.util.Map.Entry");
64 imports.addStarImports("java.util");
65 CompilerConfiguration config = new CompilerConfiguration();
66 config.addCompilationCustomizers(custom, imports);
68 this.shell = new GroovyShell(config);
71 private static class Helper {
72 private static final GremlinGroovyShellSingleton INSTANCE = new GremlinGroovyShellSingleton();
75 public static GremlinGroovyShellSingleton getInstance() {
77 return Helper.INSTANCE;
83 * @return result of graph traversal
85 public GraphTraversal<?, ?> executeTraversal (String traversal, Map<String, Object> params) {
86 Binding binding = new Binding(params);
87 Script script = shell.parse(traversal);
88 script.setBinding(binding);
89 return (GraphTraversal<?, ?>) script.run();