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| <div class="subTitle">org.apache.hadoop.mapreduce.lib.jobcontrol</div> |
| <h2 title="Class JobControl" class="title">Class JobControl</h2> |
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| <ul class="inheritance"> |
| <li>org.apache.hadoop.mapreduce.lib.jobcontrol.JobControl</li> |
| </ul> |
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| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../../../org/apache/hadoop/mapred/jobcontrol/JobControl.html" title="class in org.apache.hadoop.mapred.jobcontrol">JobControl</a></dd> |
| </dl> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public class <span class="typeNameLabel">JobControl</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a> |
| implements <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a></pre> |
| <div class="block">This class encapsulates a set of MapReduce jobs and its dependency. |
| |
| It tracks the states of the jobs by placing them into different tables |
| according to their states. |
| |
| This class provides APIs for the client app to add a job to the group |
| and to get the jobs in the group in different states. When a job is |
| added, an ID unique to the group is assigned to the job. |
| |
| This class has a thread that submits jobs when they become ready, |
| monitors the states of the running jobs, and updates the states of jobs |
| based on the state changes of their depending jobs states. The class |
| provides APIs for suspending/resuming the thread, and |
| for stopping the thread.</div> |
| </li> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#JobControl-java.lang.String-">JobControl</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> groupName)</code> |
| <div class="block">Construct a job control for a group of jobs.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <h3>Method Summary</h3> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#addJob-org.apache.hadoop.mapreduce.lib.jobcontrol.ControlledJob-">addJob</a></span>(<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a> aJob)</code> |
| <div class="block">Add a new controlled job.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#addJob-org.apache.hadoop.mapred.jobcontrol.Job-">addJob</a></span>(<a href="../../../../../../org/apache/hadoop/mapred/jobcontrol/Job.html" title="class in org.apache.hadoop.mapred.jobcontrol">Job</a> aJob)</code> |
| <div class="block">Add a new job.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#addJobCollection-java.util.Collection-">addJobCollection</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>> jobs)</code> |
| <div class="block">Add a collection of jobs</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#allFinished--">allFinished</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#getFailedJobList--">getFailedJobList</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#getReadyJobsList--">getReadyJobsList</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#getRunningJobList--">getRunningJobList</a></span>()</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#getSuccessfulJobList--">getSuccessfulJobList</a></span>()</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>org.apache.hadoop.mapreduce.lib.jobcontrol.JobControl.ThreadState</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#getThreadState--">getThreadState</a></span>()</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#getWaitingJobList--">getWaitingJobList</a></span>()</code> </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#resume--">resume</a></span>()</code> |
| <div class="block">resume the suspended thread</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#run--">run</a></span>()</code> |
| <div class="block">The main loop for the thread.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#stop--">stop</a></span>()</code> |
| <div class="block">set the thread state to STOPPING so that the |
| thread will stop when it wakes up.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/JobControl.html#suspend--">suspend</a></span>()</code> |
| <div class="block">suspend the running thread</div> |
| </td> |
| </tr> |
| </table> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="JobControl-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>JobControl</h4> |
| <pre>public JobControl(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> groupName)</pre> |
| <div class="block">Construct a job control for a group of jobs.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>groupName</code> - a name identifying this group</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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| <h3>Method Detail</h3> |
| <a name="getWaitingJobList--"> |
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| <ul class="blockList"> |
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| <h4>getWaitingJobList</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>> getWaitingJobList()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the jobs in the waiting state</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getRunningJobList--"> |
| <!-- --> |
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| <h4>getRunningJobList</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>> getRunningJobList()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the jobs in the running state</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getReadyJobsList--"> |
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| <h4>getReadyJobsList</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>> getReadyJobsList()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the jobs in the ready state</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getSuccessfulJobList--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getSuccessfulJobList</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>> getSuccessfulJobList()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the jobs in the success state</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getFailedJobList--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>getFailedJobList</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>> getFailedJobList()</pre> |
| </li> |
| </ul> |
| <a name="addJob-org.apache.hadoop.mapreduce.lib.jobcontrol.ControlledJob-"> |
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| </a> |
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| <h4>addJob</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> addJob(<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a> aJob)</pre> |
| <div class="block">Add a new controlled job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>aJob</code> - the new controlled job</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addJob-org.apache.hadoop.mapred.jobcontrol.Job-"> |
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| </a> |
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| <h4>addJob</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> addJob(<a href="../../../../../../org/apache/hadoop/mapred/jobcontrol/Job.html" title="class in org.apache.hadoop.mapred.jobcontrol">Job</a> aJob)</pre> |
| <div class="block">Add a new job.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>aJob</code> - the new job</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addJobCollection-java.util.Collection-"> |
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| <h4>addJobCollection</h4> |
| <pre>public void addJobCollection(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../../org/apache/hadoop/mapreduce/lib/jobcontrol/ControlledJob.html" title="class in org.apache.hadoop.mapreduce.lib.jobcontrol">ControlledJob</a>> jobs)</pre> |
| <div class="block">Add a collection of jobs</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>jobs</code> - </dd> |
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| <h4>getThreadState</h4> |
| <pre>public org.apache.hadoop.mapreduce.lib.jobcontrol.JobControl.ThreadState getThreadState()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the thread state</dd> |
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| <h4>stop</h4> |
| <pre>public void stop()</pre> |
| <div class="block">set the thread state to STOPPING so that the |
| thread will stop when it wakes up.</div> |
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| <h4>suspend</h4> |
| <pre>public void suspend()</pre> |
| <div class="block">suspend the running thread</div> |
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| <h4>resume</h4> |
| <pre>public void resume()</pre> |
| <div class="block">resume the suspended thread</div> |
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| <h4>run</h4> |
| <pre>public void run()</pre> |
| <div class="block">The main loop for the thread. |
| The loop does the following: |
| Check the states of the running jobs |
| Update the states of waiting jobs |
| Submit the jobs in ready state</div> |
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| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true#run--" title="class or interface in java.lang">run</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html?is-external=true" title="class or interface in java.lang">Runnable</a></code></dd> |
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