1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.shardingsphere.data.pipeline.core.datasource;
19
20 import lombok.extern.slf4j.Slf4j;
21 import org.apache.shardingsphere.data.pipeline.api.PipelineDataSourceConfiguration;
22
23 import java.util.Map;
24 import java.util.concurrent.ConcurrentHashMap;
25
26 /**
27 * Pipeline data source manager.
28 */
29 @Slf4j
30 public final class PipelineDataSourceManager implements AutoCloseable {
31
32 private final Map<PipelineDataSourceConfiguration, PipelineDataSource> cachedDataSources = new ConcurrentHashMap<>();
33
34 /**
35 * Get cached data source.
36 *
37 * @param dataSourceConfig data source configuration
38 * @return data source
39 */
40 public PipelineDataSource getDataSource(final PipelineDataSourceConfiguration dataSourceConfig) {
41 PipelineDataSource result = cachedDataSources.get(dataSourceConfig);
42 if (null != result) {
43 return result;
44 }
45 synchronized (cachedDataSources) {
46 result = cachedDataSources.get(dataSourceConfig);
47 if (null != result) {
48 if (!result.isClosed()) {
49 return result;
50 }
51 log.warn("{} is already closed, create again.", result);
52 }
53 result = new PipelineDataSource(dataSourceConfig);
54 cachedDataSources.put(dataSourceConfig, result);
55 return result;
56 }
57 }
58
59 @Override
60 public void close() {
61 for (PipelineDataSource each : cachedDataSources.values()) {
62 if (each.isClosed()) {
63 continue;
64 }
65 each.close();
66 }
67 cachedDataSources.clear();
68 }
69 }