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     */
018    
019    package org.apache.hadoop.mapred.jobcontrol;
020    
021    import java.util.ArrayList;
022    import java.util.Collection;
023    import java.util.List;
024    
025    import org.apache.hadoop.classification.InterfaceAudience;
026    import org.apache.hadoop.classification.InterfaceStability;
027    import org.apache.hadoop.mapreduce.lib.jobcontrol.ControlledJob;
028    
029    @InterfaceAudience.Public
030    @InterfaceStability.Stable
031    public class JobControl extends 
032        org.apache.hadoop.mapreduce.lib.jobcontrol.JobControl {
033    
034      /** 
035       * Construct a job control for a group of jobs.
036       * @param groupName a name identifying this group
037       */
038      public JobControl(String groupName) {
039        super(groupName);
040      }
041      
042      static ArrayList<Job> castToJobList(List<ControlledJob> cjobs) {
043        ArrayList<Job> ret = new ArrayList<Job>();
044        for (ControlledJob job : cjobs) {
045          ret.add((Job)job);
046        }
047        return ret;
048      }
049      
050      /**
051       * @return the jobs in the waiting state
052       */
053      public ArrayList<Job> getWaitingJobs() {
054        return castToJobList(super.getWaitingJobList());
055      }
056            
057      /**
058       * @return the jobs in the running state
059       */
060      public ArrayList<Job> getRunningJobs() {
061        return castToJobList(super.getRunningJobList());
062      }
063            
064      /**
065       * @return the jobs in the ready state
066       */
067      public ArrayList<Job> getReadyJobs() {
068        return castToJobList(super.getReadyJobsList());
069      }
070            
071      /**
072       * @return the jobs in the success state
073       */
074      public ArrayList<Job> getSuccessfulJobs() {
075        return castToJobList(super.getSuccessfulJobList());
076      }
077            
078      public ArrayList<Job> getFailedJobs() {
079        return castToJobList(super.getFailedJobList());
080      }
081    
082      /**
083       * Add a collection of jobs
084       * 
085       * @param jobs
086       */
087      public void addJobs(Collection <Job> jobs) {
088        for (Job job : jobs) {
089          addJob(job);
090        }
091      }
092    
093      /**
094       * @return the thread state
095       */
096      public int getState() {
097        ThreadState state = super.getThreadState();
098        if (state == ThreadState.RUNNING) {
099          return 0;
100        } 
101        if (state == ThreadState.SUSPENDED) {
102          return 1;
103        }
104        if (state == ThreadState.STOPPED) {
105          return 2;
106        }
107        if (state == ThreadState.STOPPING) {
108          return 3;
109        }
110        if (state == ThreadState.READY ) {
111          return 4;
112        }
113        return -1;
114      }
115    
116    }