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<div class="subTitle">org.apache.hadoop.hbase.procedure2.store</div>
<h2 title="Interface ProcedureStore" class="title">Interface ProcedureStore</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/NoopProcedureStore.html" title="class in org.apache.hadoop.hbase.procedure2.store">NoopProcedureStore</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStoreBase.html" title="class in org.apache.hadoop.hbase.procedure2.store">ProcedureStoreBase</a>, <a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/wal/WALProcedureStore.html" title="class in org.apache.hadoop.hbase.procedure2.store.wal">WALProcedureStore</a></dd>
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<pre>@InterfaceAudience.Private
@InterfaceStability.Evolving
public interface <a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.33">ProcedureStore</a></pre>
<div class="block">The ProcedureStore is used by the executor to persist the state of each procedure execution.
This allows to resume the execution of pending/in-progress procedures in case
of machine failure or service shutdown.</div>
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<caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Interface and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureIterator.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureIterator</a></span></code>
<div class="block">An Iterator over a collection of Procedure</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureLoader.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureLoader</a></span></code>
<div class="block">Interface passed to the ProcedureStore.load() method to handle the store-load events.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureStoreListener.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureStoreListener</a></span></code>
<div class="block">Store listener interface.</div>
</td>
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<th class="colLast" scope="col">Method and Description</th>
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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/store/ProcedureStore.html#delete-long-">delete</a></span>(long&nbsp;procId)</code>
<div class="block">The specified procId was removed from the executor,
due to completion, abort or failure.</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/store/ProcedureStore.html#delete-long:A-int-int-">delete</a></span>(long[]&nbsp;procIds,
int&nbsp;offset,
int&nbsp;count)</code>
<div class="block">The specified procIds were removed from the executor,
due to completion, abort or failure.</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/hbase/procedure2/store/ProcedureStore.html#delete-org.apache.hadoop.hbase.procedure2.Procedure-long:A-">delete</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;&nbsp;parentProc,
long[]&nbsp;subProcIds)</code>
<div class="block">The parent procedure completed.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#getNumThreads--">getNumThreads</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#insert-org.apache.hadoop.hbase.procedure2.Procedure:A-">insert</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;[]&nbsp;procs)</code>
<div class="block">Serialize a set of new procedures.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#insert-org.apache.hadoop.hbase.procedure2.Procedure-org.apache.hadoop.hbase.procedure2.Procedure:A-">insert</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;&nbsp;proc,
<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;[]&nbsp;subprocs)</code>
<div class="block">When a procedure is submitted to the executor insert(proc, null) will be called.</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/store/ProcedureStore.html#isRunning--">isRunning</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#load-org.apache.hadoop.hbase.procedure2.store.ProcedureStore.ProcedureLoader-">load</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureLoader.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureLoader</a>&nbsp;loader)</code>
<div class="block">Load the Procedures in the store.</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/store/ProcedureStore.html#recoverLease--">recoverLease</a></span>()</code>
<div class="block">Acquire the lease for the procedure store.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#registerListener-org.apache.hadoop.hbase.procedure2.store.ProcedureStore.ProcedureStoreListener-">registerListener</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureStoreListener.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureStoreListener</a>&nbsp;listener)</code>
<div class="block">Add the listener to the notification list.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#setRunningProcedureCount-int-">setRunningProcedureCount</a></span>(int&nbsp;count)</code>
<div class="block">Set the number of procedure running.</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/hbase/procedure2/store/ProcedureStore.html#start-int-">start</a></span>(int&nbsp;numThreads)</code>
<div class="block">Start/Open the procedure store</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/hbase/procedure2/store/ProcedureStore.html#stop-boolean-">stop</a></span>(boolean&nbsp;abort)</code>
<div class="block">Stop/Close the procedure store</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#unregisterListener-org.apache.hadoop.hbase.procedure2.store.ProcedureStore.ProcedureStoreListener-">unregisterListener</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureStoreListener.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureStoreListener</a>&nbsp;listener)</code>
<div class="block">Remove the listener from the notification list.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#update-org.apache.hadoop.hbase.procedure2.Procedure-">update</a></span>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;&nbsp;proc)</code>
<div class="block">The specified procedure was executed,
and the new state should be written to the store.</div>
</td>
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</table>
</li>
</ul>
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<div class="details">
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<h3>Method Detail</h3>
<a name="registerListener-org.apache.hadoop.hbase.procedure2.store.ProcedureStore.ProcedureStoreListener-">
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<h4>registerListener</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.140">registerListener</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureStoreListener.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureStoreListener</a>&nbsp;listener)</pre>
<div class="block">Add the listener to the notification list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - The AssignmentListener to register</dd>
</dl>
</li>
</ul>
<a name="unregisterListener-org.apache.hadoop.hbase.procedure2.store.ProcedureStore.ProcedureStoreListener-">
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<h4>unregisterListener</h4>
<pre>boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.147">unregisterListener</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureStoreListener.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureStoreListener</a>&nbsp;listener)</pre>
<div class="block">Remove the listener from the notification list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>listener</code> - The AssignmentListener to unregister</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the listner was in the list and it was removed, otherwise false.</dd>
</dl>
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<h4>start</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.153">start</a>(int&nbsp;numThreads)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Start/Open the procedure store</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>numThreads</code> - number of threads to be used by the procedure store</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
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<h4>stop</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.159">stop</a>(boolean&nbsp;abort)</pre>
<div class="block">Stop/Close the procedure store</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>abort</code> - true if the stop is an abort</dd>
</dl>
</li>
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<a name="isRunning--">
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<h4>isRunning</h4>
<pre>boolean&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.164">isRunning</a>()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if the store is running, otherwise false.</dd>
</dl>
</li>
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<a name="getNumThreads--">
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<h4>getNumThreads</h4>
<pre>int&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.169">getNumThreads</a>()</pre>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of threads/slots passed to start()</dd>
</dl>
</li>
</ul>
<a name="setRunningProcedureCount-int-">
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<h4>setRunningProcedureCount</h4>
<pre>int&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.176">setRunningProcedureCount</a>(int&nbsp;count)</pre>
<div class="block">Set the number of procedure running.
This can be used, for example, by the store to know how long to wait before a sync.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>how many procedures are running (may not be same as <code>count</code>).</dd>
</dl>
</li>
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<a name="recoverLease--">
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<h4>recoverLease</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.181">recoverLease</a>()
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Acquire the lease for the procedure store.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
</li>
</ul>
<a name="load-org.apache.hadoop.hbase.procedure2.store.ProcedureStore.ProcedureLoader-">
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<h4>load</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.187">load</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/store/ProcedureStore.ProcedureLoader.html" title="interface in org.apache.hadoop.hbase.procedure2.store">ProcedureStore.ProcedureLoader</a>&nbsp;loader)
throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Load the Procedures in the store.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>loader</code> - the ProcedureLoader that will handle the store-load events</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
</dl>
</li>
</ul>
<a name="insert-org.apache.hadoop.hbase.procedure2.Procedure-org.apache.hadoop.hbase.procedure2.Procedure:A-">
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<h4>insert</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.200">insert</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;&nbsp;proc,
<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;[]&nbsp;subprocs)</pre>
<div class="block">When a procedure is submitted to the executor insert(proc, null) will be called.
'proc' has a 'RUNNABLE' state and the initial information required to start up.
When a procedure is executed and it returns children insert(proc, subprocs) will be called.
'proc' has a 'WAITING' state and an update state.
'subprocs' are the children in 'RUNNABLE' state with the initial information.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>proc</code> - the procedure to serialize and write to the store.</dd>
<dd><code>subprocs</code> - the newly created child of the proc.</dd>
</dl>
</li>
</ul>
<a name="insert-org.apache.hadoop.hbase.procedure2.Procedure:A-">
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<h4>insert</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.209">insert</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;[]&nbsp;procs)</pre>
<div class="block">Serialize a set of new procedures.
These procedures are freshly submitted to the executor and each procedure
has a 'RUNNABLE' state and the initial information required to start up.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>procs</code> - the procedures to serialize and write to the store.</dd>
</dl>
</li>
</ul>
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<h4>update</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.216">update</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;&nbsp;proc)</pre>
<div class="block">The specified procedure was executed,
and the new state should be written to the store.</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>proc</code> - the procedure to serialize and write to the store.</dd>
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<h4>delete</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.224">delete</a>(long&nbsp;procId)</pre>
<div class="block">The specified procId was removed from the executor,
due to completion, abort or failure.
The store implementor should remove all the information about the specified procId.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>procId</code> - the ID of the procedure to remove.</dd>
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<h4>delete</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.232">delete</a>(<a href="../../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a>&lt;?&gt;&nbsp;parentProc,
long[]&nbsp;subProcIds)</pre>
<div class="block">The parent procedure completed.
Update the state and mark all the child deleted.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>parentProc</code> - the parent procedure to serialize and write to the store.</dd>
<dd><code>subProcIds</code> - the IDs of the sub-procedure to remove.</dd>
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<h4>delete</h4>
<pre>void&nbsp;<a href="../../../../../../src-html/org/apache/hadoop/hbase/procedure2/store/ProcedureStore.html#line.242">delete</a>(long[]&nbsp;procIds,
int&nbsp;offset,
int&nbsp;count)</pre>
<div class="block">The specified procIds were removed from the executor,
due to completion, abort or failure.
The store implementor should remove all the information about the specified procIds.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>procIds</code> - the IDs of the procedures to remove.</dd>
<dd><code>offset</code> - the array offset from where to start to delete</dd>
<dd><code>count</code> - the number of IDs to delete</dd>
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