2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 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=========================================================
21 package org.openecomp.aai.rest.search;
23 import java.util.HashMap;
25 import java.util.concurrent.TimeUnit;
27 import org.apache.tinkerpop.gremlin.structure.Vertex;
28 import org.codehaus.groovy.ast.ClassHelper;
29 import org.codehaus.groovy.ast.expr.ClassExpression;
30 import org.codehaus.groovy.ast.expr.PropertyExpression;
31 import org.codehaus.groovy.control.CompilerConfiguration;
32 import org.codehaus.groovy.control.customizers.ASTTransformationCustomizer;
33 import org.codehaus.groovy.control.customizers.ImportCustomizer;
34 import org.openecomp.aai.query.builder.QueryBuilder;
35 import org.openecomp.aai.serialization.engines.QueryStyle;
36 import org.openecomp.aai.serialization.engines.TransactionalGraphEngine;
38 import groovy.lang.Binding;
39 import groovy.lang.GroovyShell;
40 import groovy.lang.Script;
41 import groovy.transform.TimedInterrupt;
44 * Creates and returns a groovy shell with the
45 * configuration to statically import graph classes
48 public class GroovyQueryBuilderSingleton {
50 private final GroovyShell shell;
51 private GroovyQueryBuilderSingleton() {
52 Map<String, Object> parameters = new HashMap<>();
53 parameters.put("value", 30000);
54 parameters.put("unit", new PropertyExpression(new ClassExpression(ClassHelper.make(TimeUnit.class)),"MILLISECONDS"));
56 ASTTransformationCustomizer custom = new ASTTransformationCustomizer(parameters, TimedInterrupt.class);
57 ImportCustomizer imports = new ImportCustomizer();
58 imports.addStaticStars(
59 "org.apache.tinkerpop.gremlin.process.traversal.P"
62 "org.apache.tinkerpop.gremlin.process.traversal.dsl.graph.__",
63 "org.apache.tinkerpop.gremlin.structure.T",
64 "org.apache.tinkerpop.gremlin.process.traversal.P",
65 "org.openecomp.aai.serialization.db.EdgeType");
66 CompilerConfiguration config = new CompilerConfiguration();
67 config.addCompilationCustomizers(custom, imports);
69 this.shell = new GroovyShell(config);
72 private static class Helper {
73 private static final GroovyQueryBuilderSingleton INSTANCE = new GroovyQueryBuilderSingleton();
76 public static GroovyQueryBuilderSingleton getInstance() {
78 return Helper.INSTANCE;
84 * @return result of graph traversal
86 public String executeTraversal (TransactionalGraphEngine engine, String traversal, Map<String, Object> params) {
87 QueryBuilder<Vertex> builder = engine.getQueryBuilder(QueryStyle.GREMLIN_TRAVERSAL);
88 Binding binding = new Binding(params);
89 binding.setVariable("builder", builder);
90 Script script = shell.parse(traversal);
91 script.setBinding(binding);
94 return builder.getQuery();