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| <div class="subTitle">org.apache.hadoop.hbase.procedure2</div> |
| <h2 title="Class SimpleProcedureScheduler" class="title">Class SimpleProcedureScheduler</h2> |
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| <li><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler</a></li> |
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| <li>org.apache.hadoop.hbase.procedure2.SimpleProcedureScheduler</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureScheduler.html" title="interface in org.apache.hadoop.hbase.procedure2">ProcedureScheduler</a></dd> |
| </dl> |
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| <pre>@InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.31">SimpleProcedureScheduler</a> |
| extends <a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a></pre> |
| <div class="block">Simple scheduler for procedures</div> |
| </li> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureDeque.html" title="class in org.apache.hadoop.hbase.procedure2">ProcedureDeque</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#runnables">runnables</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#SimpleProcedureScheduler--">SimpleProcedureScheduler</a></span>()</code> </td> |
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| <h3>Method Summary</h3> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#clear--">clear</a></span>()</code> |
| <div class="block">Clear current state of scheduler such that it is equivalent to newly created scheduler.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#completionCleanup-org.apache.hadoop.hbase.procedure2.Procedure-">completionCleanup</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> proc)</code> |
| <div class="block">The procedure in execution completed.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#dequeue--">dequeue</a></span>()</code> |
| <div class="block">Fetch one Procedure from the queue |
| NOTE: this method is called with the sched lock held.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#enqueue-org.apache.hadoop.hbase.procedure2.Procedure-boolean-">enqueue</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> procedure, |
| boolean addFront)</code> |
| <div class="block">Add the procedure to the queue.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/procedure2/LockedResource.html" title="class in org.apache.hadoop.hbase.procedure2">LockedResource</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#getLockResource-org.apache.hadoop.hbase.procedure2.LockedResourceType-java.lang.String-">getLockResource</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/LockedResourceType.html" title="enum in org.apache.hadoop.hbase.procedure2">LockedResourceType</a> resourceType, |
| <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> resourceName)</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/hbase/procedure2/LockedResource.html" title="class in org.apache.hadoop.hbase.procedure2">LockedResource</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#getLocks--">getLocks</a></span>()</code> |
| <div class="block">List lock queues.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#queueHasRunnables--">queueHasRunnables</a></span>()</code> |
| <div class="block">Returns true if there are procedures available to process.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#queueSize--">queueSize</a></span>()</code> |
| <div class="block">Returns the number of elements in this queue.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#yield-org.apache.hadoop.hbase.procedure2.Procedure-">yield</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> proc)</code> |
| <div class="block">The procedure can't run at the moment.</div> |
| </td> |
| </tr> |
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| <h3>Methods inherited from class org.apache.hadoop.hbase.procedure2.<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a></h3> |
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| <h4>runnables</h4> |
| <pre>private final <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureDeque.html" title="class in org.apache.hadoop.hbase.procedure2">ProcedureDeque</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.32">runnables</a></pre> |
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| <h4>SimpleProcedureScheduler</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.31">SimpleProcedureScheduler</a>()</pre> |
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| <a name="enqueue-org.apache.hadoop.hbase.procedure2.Procedure-boolean-"> |
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| <h4>enqueue</h4> |
| <pre>protected void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.35">enqueue</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> procedure, |
| boolean addFront)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#enqueue-org.apache.hadoop.hbase.procedure2.Procedure-boolean-">AbstractProcedureScheduler</a></code></span></div> |
| <div class="block">Add the procedure to the queue. |
| NOTE: this method is called with the sched lock held.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#enqueue-org.apache.hadoop.hbase.procedure2.Procedure-boolean-">enqueue</a></code> in class <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>procedure</code> - the Procedure to add</dd> |
| <dd><code>addFront</code> - true if the item should be added to the front of the queue</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="dequeue--"> |
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| <h4>dequeue</h4> |
| <pre>protected <a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.44">dequeue</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#dequeue--">AbstractProcedureScheduler</a></code></span></div> |
| <div class="block">Fetch one Procedure from the queue |
| NOTE: this method is called with the sched lock held.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#dequeue--">dequeue</a></code> in class <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the Procedure to execute, or null if nothing is available.</dd> |
| </dl> |
| </li> |
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| <a name="clear--"> |
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| <h4>clear</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.49">clear</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureScheduler.html#clear--">ProcedureScheduler</a></code></span></div> |
| <div class="block">Clear current state of scheduler such that it is equivalent to newly created scheduler. |
| Used for testing failure and recovery. To emulate server crash/restart, |
| <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureExecutor.html" title="class in org.apache.hadoop.hbase.procedure2"><code>ProcedureExecutor</code></a> resets its own state and calls clear() on scheduler.</div> |
| </li> |
| </ul> |
| <a name="yield-org.apache.hadoop.hbase.procedure2.Procedure-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>yield</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.59">yield</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> proc)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureScheduler.html#yield-org.apache.hadoop.hbase.procedure2.Procedure-">ProcedureScheduler</a></code></span></div> |
| <div class="block">The procedure can't run at the moment. |
| add it back to the queue, giving priority to someone else.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>proc</code> - the Procedure to add back to the list</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="queueHasRunnables--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>queueHasRunnables</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.64">queueHasRunnables</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#queueHasRunnables--">AbstractProcedureScheduler</a></code></span></div> |
| <div class="block">Returns true if there are procedures available to process. |
| NOTE: this method is called with the sched lock held.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#queueHasRunnables--">queueHasRunnables</a></code> in class <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if there are procedures available to process, otherwise false.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="queueSize--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>queueSize</h4> |
| <pre>public int <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.69">queueSize</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#queueSize--">AbstractProcedureScheduler</a></code></span></div> |
| <div class="block">Returns the number of elements in this queue. |
| NOTE: this method is called with the sched lock held.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html#queueSize--">queueSize</a></code> in class <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the number of elements in this queue.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="completionCleanup-org.apache.hadoop.hbase.procedure2.Procedure-"> |
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| <h4>completionCleanup</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.74">completionCleanup</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> proc)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureScheduler.html#completionCleanup-org.apache.hadoop.hbase.procedure2.Procedure-">ProcedureScheduler</a></code></span></div> |
| <div class="block">The procedure in execution completed. |
| This can be implemented to perform cleanups.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>proc</code> - the Procedure that completed the execution.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getLocks--"> |
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| <h4>getLocks</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/hbase/procedure2/LockedResource.html" title="class in org.apache.hadoop.hbase.procedure2">LockedResource</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.78">getLocks</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureScheduler.html#getLocks--">ProcedureScheduler</a></code></span></div> |
| <div class="block">List lock queues.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the locks</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getLockResource-org.apache.hadoop.hbase.procedure2.LockedResourceType-java.lang.String-"> |
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| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getLockResource</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/procedure2/LockedResource.html" title="class in org.apache.hadoop.hbase.procedure2">LockedResource</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/SimpleProcedureScheduler.html#line.83">getLockResource</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/LockedResourceType.html" title="enum in org.apache.hadoop.hbase.procedure2">LockedResourceType</a> resourceType, |
| <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> resourceName)</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/procedure2/LockedResource.html" title="class in org.apache.hadoop.hbase.procedure2"><code>LockedResource</code></a> for resource of specified type & name. null if resource is not |
| locked.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
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