View Javadoc

1   /**
2    * Licensed to the Apache Software Foundation (ASF) under one
3    * or more contributor license agreements.  See the NOTICE file
4    * distributed with this work for additional information
5    * regarding copyright ownership.  The ASF licenses this file
6    * to you under the Apache License, Version 2.0 (the
7    * "License"); you may not use this file except in compliance
8    * with the License.  You may obtain a copy of the License at
9    *
10   *     http://www.apache.org/licenses/LICENSE-2.0
11   *
12   * Unless required by applicable law or agreed to in writing, software
13   * distributed under the License is distributed on an "AS IS" BASIS,
14   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15   * See the License for the specific language governing permissions and
16   * limitations under the License.
17   */
18  package org.apache.hadoop.hbase.procedure;
19  
20  import java.io.IOException;
21  import java.util.Hashtable;
22  
23  import org.apache.hadoop.conf.Configuration;
24  import org.apache.hadoop.hbase.master.HMaster;
25  import org.apache.hadoop.hbase.master.MasterServices;
26  import org.apache.hadoop.hbase.master.MetricsMaster;
27  import org.apache.zookeeper.KeeperException;
28  
29  /**
30   * Provides the globally barriered procedure framework and environment for
31   * master oriented operations. {@link HMaster} interacts with the loaded
32   * procedure manager through this class.
33   */
34  public class MasterProcedureManagerHost extends
35      ProcedureManagerHost<MasterProcedureManager> {
36  
37    private Hashtable<String, MasterProcedureManager> procedureMgrMap
38        = new Hashtable<String, MasterProcedureManager>();
39  
40    @Override
41    public void loadProcedures(Configuration conf) {
42      loadUserProcedures(conf, MASTER_PROCEUDRE_CONF_KEY);
43      for (MasterProcedureManager mpm : getProcedureManagers()) {
44        procedureMgrMap.put(mpm.getProcedureSignature(), mpm);
45      }
46    }
47  
48    public void initialize(MasterServices master, final MetricsMaster metricsMaster)
49        throws KeeperException, IOException, UnsupportedOperationException {
50      for (MasterProcedureManager mpm : getProcedureManagers()) {
51        mpm.initialize(master, metricsMaster);
52      }
53    }
54  
55    public void stop(String why) {
56      for (MasterProcedureManager mpm : getProcedureManagers()) {
57        mpm.stop(why);
58      }
59    }
60  
61    public MasterProcedureManager getProcedureManager(String signature) {
62      return procedureMgrMap.get(signature);
63    }
64  }