1 package org.apache.helix.controller.pipeline;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.util.ArrayList;
23 import java.util.Collections;
24 import java.util.HashMap;
25 import java.util.List;
26 import java.util.Map;
27
28 public class PipelineRegistry
29 {
30 Map<String, List<Pipeline>> _map;
31
32 public PipelineRegistry()
33 {
34 _map = new HashMap<String, List<Pipeline>>();
35 }
36
37 public void register(String eventName, Pipeline... pipelines)
38 {
39 if (!_map.containsKey(eventName))
40 {
41 _map.put(eventName, new ArrayList<Pipeline>());
42 }
43 List<Pipeline> list = _map.get(eventName);
44 for (Pipeline pipeline : pipelines)
45 {
46 list.add(pipeline);
47 }
48 }
49
50 public List<Pipeline> getPipelinesForEvent(String eventName)
51 {
52 if (_map.containsKey(eventName))
53 {
54 return _map.get(eventName);
55 }
56 return Collections.emptyList();
57 }
58 }