2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright © 2017-2018 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.onap.aai.queries;
23 import java.io.IOException;
24 import java.nio.file.Files;
25 import java.nio.file.Path;
26 import java.nio.file.Paths;
27 import java.util.Timer;
28 import javax.annotation.PostConstruct;
30 import org.onap.aai.logging.LogFormatTools;
31 import org.onap.aai.util.AAIConstants;
32 import org.slf4j.Logger;
33 import org.slf4j.LoggerFactory;
34 import org.springframework.beans.factory.annotation.Value;
36 public class GremlinServerSingleton {
38 private static Logger logger = LoggerFactory.getLogger(GremlinServerSingleton.class);
40 private boolean timerSet;
43 private GetCustomQueryConfig queryConfig;
45 @Value("${schema.queries.location}")
46 private String storedQueriesLocation;
49 * Initializes the gremlin server singleton
50 * Loads the configuration of the gremlin server and creates a cluster
51 * Loads the gremlin query file into the properties object
52 * Then creates a file watcher to watch the file every ten seconds
53 * and if there is a change in the file, then reloads the file into
54 * the properties object
62 storedQueriesLocation + AAIConstants.AAI_FILESEP + "stored-queries.json";
63 Path path = Paths.get(filepath);
64 String customQueryConfigJson = new String(Files.readAllBytes(path));
66 queryConfig = new GetCustomQueryConfig(customQueryConfigJson);
67 } catch (IOException e) {
68 logger.error("Error occurred during the processing of query json file: "
69 + LogFormatTools.getStackTop(e));
75 * Gets the query using CustomQueryConfig
77 * @param key the config key
78 * @return the stored query
80 public String getStoredQueryFromConfig(String key) {
81 CustomQueryConfig customQueryConfig = queryConfig.getStoredQuery(key);
82 if (customQueryConfig == null) {
85 return customQueryConfig.getQuery();
88 public CustomQueryConfig getCustomQueryConfig(String key) {
89 return queryConfig.getStoredQuery(key);