001/* 002 * Copyright (c) 2015 Maxim Yunusov 003 * Licensed under the Apache License, Version 2.0 (the "License"); 004 * you may not use this file except in compliance with the License. 005 * You may obtain a copy of the License at 006 * 007 * http://www.apache.org/licenses/LICENSE-2.0 008 * 009 * Unless required by applicable law or agreed to in writing, software 010 * distributed under the License is distributed on an "AS IS" BASIS, 011 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012 * See the License for the specific language governing permissions and 013 * limitations under the License. 014 */ 015 016package org.maxur.perfmodel.backend; 017 018import org.glassfish.hk2.api.Factory; 019import org.glassfish.hk2.api.ServiceLocator; 020import org.maxur.perfmodel.backend.infrastructure.DataSourceLevelDbImpl; 021 022import javax.inject.Inject; 023 024/** 025 * @author myunusov 026 * @version 1.0 027 * @since <pre>12.09.2015</pre> 028 */ 029public class DataSourceProvider implements Factory<DataSourceLevelDbImpl> { 030 031 private static DataSourceLevelDbImpl ds; 032 033 @Inject 034 private ServiceLocator locator; 035 036 @Override 037 public DataSourceLevelDbImpl provide() { 038 if (ds == null) { 039 ds = new DataSourceLevelDbImpl(); 040 locator.inject(ds); 041 ds.init(); 042 } 043 return ds; 044 } 045 046 @Override 047 public void dispose(final DataSourceLevelDbImpl instance) { 048 instance.stop(); 049 } 050}