1 /*
2 * Copyright (c) 2015 Maxim Yunusov
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 package org.maxur.perfmodel.backend;
17
18 import org.glassfish.hk2.api.Factory;
19 import org.glassfish.hk2.api.ServiceLocator;
20 import org.maxur.perfmodel.backend.infrastructure.DataSourceLevelDbImpl;
21
22 import javax.inject.Inject;
23
24 /**
25 * @author myunusov
26 * @version 1.0
27 * @since <pre>12.09.2015</pre>
28 */
29 public class DataSourceProvider implements Factory<DataSourceLevelDbImpl> {
30
31 private static DataSourceLevelDbImpl ds;
32
33 @Inject
34 private ServiceLocator locator;
35
36 @Override
37 public DataSourceLevelDbImpl provide() {
38 if (ds == null) {
39 ds = new DataSourceLevelDbImpl();
40 locator.inject(ds);
41 ds.init();
42 }
43 return ds;
44 }
45
46 @Override
47 public void dispose(final DataSourceLevelDbImpl instance) {
48 instance.stop();
49 }
50 }