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| <div class="subTitle">org.apache.hadoop.hbase.procedure2</div> |
| <h2 title="Class ProcedureEvent" class="title">Class ProcedureEvent<T></h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.hadoop.hbase.procedure2.ProcedureEvent<T></li> |
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| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/master/assignment/RegionStateNode.AssignmentProcedureEvent.html" title="class in org.apache.hadoop.hbase.master.assignment">RegionStateNode.AssignmentProcedureEvent</a></dd> |
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| <hr> |
| <br> |
| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.30">ProcedureEvent</a><T> |
| 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></pre> |
| <div class="block">Basic ProcedureEvent that contains an "object", which can be a description or a reference to the |
| resource to wait on, and a queue for suspended procedures.</div> |
| </li> |
| </ul> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html" title="type parameter in ProcedureEvent">T</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#object">object</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#ready">ready</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <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/ProcedureEvent.html#suspendedProcedures">suspendedProcedures</a></span></code> </td> |
| </tr> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#ProcedureEvent-T-">ProcedureEvent</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html" title="type parameter in ProcedureEvent">T</a> object)</code> </td> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><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/ProcedureEvent.html#getSuspendedProcedures--">getSuspendedProcedures</a></span>()</code> |
| <div class="block">Access to suspendedProcedures is 'synchronized' on this object, but it's fine to return it |
| here for tests.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#isReady--">isReady</a></span>()</code> </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/ProcedureEvent.html#suspend--">suspend</a></span>()</code> |
| <div class="block">Mark the event as not ready.</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/hbase/procedure2/ProcedureEvent.html#suspendIfNotReady-org.apache.hadoop.hbase.procedure2.Procedure-">suspendIfNotReady</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> proc)</code> </td> |
| </tr> |
| <tr id="i4" 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/hbase/procedure2/ProcedureEvent.html#toString--">toString</a></span>()</code> </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/ProcedureEvent.html#wake-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-">wake</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> procedureScheduler)</code> |
| <div class="block">Wakes up the suspended procedures by pushing them back into scheduler queues and sets the |
| event as ready.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#wakeEvents-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-org.apache.hadoop.hbase.procedure2.ProcedureEvent...-">wakeEvents</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> scheduler, |
| <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html" title="class in org.apache.hadoop.hbase.procedure2">ProcedureEvent</a>... events)</code> |
| <div class="block">Wakes up all the given events and puts the procedures waiting on them back into |
| ProcedureScheduler queues.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#wakeIfSuspended-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-org.apache.hadoop.hbase.procedure2.Procedure-">wakeIfSuspended</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> procedureScheduler, |
| <a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a><?> proc)</code> |
| <div class="block">Wakes up the suspended procedures only if the given <code>proc</code> is waiting on this event.</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/ProcedureEvent.html#wakeInternal-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-">wakeInternal</a></span>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> procedureScheduler)</code> |
| <div class="block">Only to be used by ProcedureScheduler implementations.</div> |
| </td> |
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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#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> |
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| <h4>LOG</h4> |
| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.31">LOG</a></pre> |
| </li> |
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| <h4>object</h4> |
| <pre>private final <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html" title="type parameter in ProcedureEvent">T</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.33">object</a></pre> |
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| <h4>ready</h4> |
| <pre>private boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.34">ready</a></pre> |
| </li> |
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| <h4>suspendedProcedures</h4> |
| <pre>private <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/ProcedureEvent.html#line.35">suspendedProcedures</a></pre> |
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| <h3>Constructor Detail</h3> |
| <a name="ProcedureEvent-java.lang.Object-"> |
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| <h4>ProcedureEvent</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.37">ProcedureEvent</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html" title="type parameter in ProcedureEvent">T</a> object)</pre> |
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| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.41">isReady</a>()</pre> |
| </li> |
| </ul> |
| <a name="suspendIfNotReady-org.apache.hadoop.hbase.procedure2.Procedure-"> |
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| <h4>suspendIfNotReady</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.48">suspendIfNotReady</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a> proc)</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if event is not ready and adds procedure to suspended queue, else returns false.</dd> |
| </dl> |
| </li> |
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| <h4>suspend</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.56">suspend</a>()</pre> |
| <div class="block">Mark the event as not ready.</div> |
| </li> |
| </ul> |
| <a name="wake-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-"> |
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| <h4>wake</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.68">wake</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> procedureScheduler)</pre> |
| <div class="block">Wakes up the suspended procedures by pushing them back into scheduler queues and sets the |
| event as ready. |
| See <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#wakeInternal-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-"><code>wakeInternal(AbstractProcedureScheduler)</code></a> for why this is not synchronized.</div> |
| </li> |
| </ul> |
| <a name="wakeIfSuspended-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-org.apache.hadoop.hbase.procedure2.Procedure-"> |
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| <h4>wakeIfSuspended</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.79">wakeIfSuspended</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> procedureScheduler, |
| <a href="../../../../../org/apache/hadoop/hbase/procedure2/Procedure.html" title="class in org.apache.hadoop.hbase.procedure2">Procedure</a><?> proc)</pre> |
| <div class="block">Wakes up the suspended procedures only if the given <code>proc</code> is waiting on this event. |
| <p/> |
| Mainly used by region assignment to reject stale OpenRegionProcedure/CloseRegionProcedure. Use |
| with caution as it will cause performance issue if there are lots of procedures waiting on the |
| event.</div> |
| </li> |
| </ul> |
| <a name="wakeEvents-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-org.apache.hadoop.hbase.procedure2.ProcedureEvent...-"> |
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| <h4>wakeEvents</h4> |
| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.92">wakeEvents</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> scheduler, |
| <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html" title="class in org.apache.hadoop.hbase.procedure2">ProcedureEvent</a>... events)</pre> |
| <div class="block">Wakes up all the given events and puts the procedures waiting on them back into |
| ProcedureScheduler queues.</div> |
| </li> |
| </ul> |
| <a name="wakeInternal-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-"> |
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| <h4>wakeInternal</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.109">wakeInternal</a>(<a href="../../../../../org/apache/hadoop/hbase/procedure2/AbstractProcedureScheduler.html" title="class in org.apache.hadoop.hbase.procedure2">AbstractProcedureScheduler</a> procedureScheduler)</pre> |
| <div class="block">Only to be used by ProcedureScheduler implementations. |
| Reason: To wake up multiple events, locking sequence is |
| schedLock --> synchronized (event) |
| To wake up an event, both schedLock() and synchronized(event) are required. |
| The order is schedLock() --> synchronized(event) because when waking up multiple events |
| simultaneously, we keep the scheduler locked until all procedures suspended on these events |
| have been added back to the queue (Maybe it's not required? Evaluate!) |
| To avoid deadlocks, we want to keep the locking order same even when waking up single event. |
| That's why, <a href="../../../../../org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#wake-org.apache.hadoop.hbase.procedure2.AbstractProcedureScheduler-"><code>wake(AbstractProcedureScheduler)</code></a> above uses the same code path as used |
| when waking up multiple events. |
| Access should remain package-private.</div> |
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| <a name="getSuspendedProcedures--"> |
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| <h4>getSuspendedProcedures</h4> |
| <pre>public <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/ProcedureEvent.html#line.128">getSuspendedProcedures</a>()</pre> |
| <div class="block">Access to suspendedProcedures is 'synchronized' on this object, but it's fine to return it |
| here for tests.</div> |
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| <h4>toString</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> <a href="../../../../../src-html/org/apache/hadoop/hbase/procedure2/ProcedureEvent.html#line.133">toString</a>()</pre> |
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