001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.procedure;
019
020import java.io.IOException;
021import java.util.Hashtable;
022import org.apache.hadoop.conf.Configuration;
023import org.apache.hadoop.hbase.master.MasterServices;
024import org.apache.hadoop.hbase.master.MetricsMaster;
025import org.apache.yetus.audience.InterfaceAudience;
026import org.apache.zookeeper.KeeperException;
027
028/**
029 * Provides the globally barriered procedure framework and environment for
030 * master oriented operations. {@link org.apache.hadoop.hbase.master.HMaster}
031 * interacts with the loaded procedure manager through this class.
032 */
033@InterfaceAudience.Private
034public class MasterProcedureManagerHost extends
035    ProcedureManagerHost<MasterProcedureManager> {
036
037  private Hashtable<String, MasterProcedureManager> procedureMgrMap = new Hashtable<>();
038
039  @Override
040  public void loadProcedures(Configuration conf) {
041    loadUserProcedures(conf, MASTER_PROCEDURE_CONF_KEY);
042    for (MasterProcedureManager mpm : getProcedureManagers()) {
043      procedureMgrMap.put(mpm.getProcedureSignature(), mpm);
044    }
045  }
046
047  public void initialize(MasterServices master, final MetricsMaster metricsMaster)
048      throws KeeperException, IOException, UnsupportedOperationException {
049    for (MasterProcedureManager mpm : getProcedureManagers()) {
050      mpm.initialize(master, metricsMaster);
051    }
052  }
053
054  public void stop(String why) {
055    for (MasterProcedureManager mpm : getProcedureManagers()) {
056      mpm.stop(why);
057    }
058  }
059
060  public MasterProcedureManager getProcedureManager(String signature) {
061    return procedureMgrMap.get(signature);
062  }
063}