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.regionserver.handler;
019
020import org.apache.hadoop.hbase.executor.EventHandler;
021import org.apache.hadoop.hbase.procedure2.RSProcedureCallable;
022import org.apache.hadoop.hbase.regionserver.HRegionServer;
023import org.apache.yetus.audience.InterfaceAudience;
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026import org.slf4j.MDC;
027
028/**
029 * A event handler for running procedure.
030 */
031@InterfaceAudience.Private
032public class RSProcedureHandler extends EventHandler {
033
034  private static final Logger LOG = LoggerFactory.getLogger(RSProcedureHandler.class);
035
036  private final long procId;
037
038  private final RSProcedureCallable callable;
039
040  public RSProcedureHandler(HRegionServer rs, long procId, RSProcedureCallable callable) {
041    super(rs, callable.getEventType());
042    this.procId = procId;
043    this.callable = callable;
044  }
045
046  @Override
047  public void process() {
048    Throwable error = null;
049    try {
050      MDC.put("pid", Long.toString(procId));
051      callable.call();
052    } catch (Throwable t) {
053      LOG.error("pid=" + this.procId, t);
054      error = t;
055    } finally {
056      ((HRegionServer) server).remoteProcedureComplete(procId, error);
057    }
058  }
059}