/** * Copyright 2005 The Apache Software Foundation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */package org.apache.hadoop.mapred;import java.io.*;/**  * Includes details on a running MapReduce job.  A client can * track a living job using this object. * * @author Mike Cafarella */public interface RunningJob {    /**     * Returns an identifier for the job     */    public String getJobID();    /**     * Returns the path of the submitted job.     */    public String getJobFile();    /**     * Returns a URL where some job progress information will be displayed.     */    public String getTrackingURL();    /**     * Returns a float between 0.0 and 1.0, indicating progress on     * the map portion of the job.  When all map tasks have completed,     * the function returns 1.0.     */    public float mapProgress() throws IOException;    /**     * Returns a float between 0.0 and 1.0, indicating progress on     * the reduce portion of the job.  When all reduce tasks have completed,     * the function returns 1.0.     */    public float reduceProgress() throws IOException;    /**     * Non-blocking function to check whether the job is finished or not.     */    public boolean isComplete() throws IOException;    /**     * True iff job completed successfully.     */    public boolean isSuccessful() throws IOException;    /**     * Blocks until the job is complete.     */    public void waitForCompletion() throws IOException;    /**     * Kill the running job.  Blocks until all job tasks have been     * killed as well.  If the job is no longer running, it simply returns.     */    public void killJob() throws IOException;}