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<h2 title="Class TaskWrapper" class="title">Class TaskWrapper</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>org.apache.gearpump.streaming.task.TaskWrapper</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a>, <a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html" title="interface in org.apache.gearpump.streaming.task">TaskInterface</a></dd>
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<pre>public class <span class="typeNameLabel">TaskWrapper</span>
extends java.lang.Object
implements <a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a>, <a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html" title="interface in org.apache.gearpump.streaming.task">TaskInterface</a></pre>
<div class="block">This provides TaskContext for user defined tasks
<p>
param: taskClass task class
param: context context class
param: userConf user config</div>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#TaskWrapper-org.apache.gearpump.streaming.task.TaskId-java.lang.Class-org.apache.gearpump.streaming.task.TaskContextData-org.apache.gearpump.cluster.UserConfig-">TaskWrapper</a></span>(<a href="../../../../../org/apache/gearpump/streaming/task/TaskId.html" title="class in org.apache.gearpump.streaming.task">TaskId</a>&nbsp;taskId,
java.lang.Class&lt;? extends <a href="../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a>&gt;&nbsp;taskClass,
<a href="../../../../../org/apache/gearpump/streaming/task/TaskContextData.html" title="class in org.apache.gearpump.streaming.task">TaskContextData</a>&nbsp;context,
<a href="../../../../../org/apache/gearpump/cluster/UserConfig.html" title="class in org.apache.gearpump.cluster">UserConfig</a>&nbsp;userConf)</code>&nbsp;</td>
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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>akka.actor.ActorRef</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#actorOf-akka.actor.Props-">actorOf</a></span>(akka.actor.Props&nbsp;props)</code>&nbsp;</td>
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<tr id="i1" class="rowColor">
<td class="colFirst"><code>akka.actor.ActorRef</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#actorOf-akka.actor.Props-java.lang.String-">actorOf</a></span>(akka.actor.Props&nbsp;props,
java.lang.String&nbsp;name)</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#appId--">appId</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>akka.actor.ActorRef</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#appMaster--">appMaster</a></span>()</code>
<div class="block">The actorRef of AppMaster</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#appName--">appName</a></span>()</code>&nbsp;</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#executorId--">executorId</a></span>()</code>&nbsp;</td>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>org.slf4j.Logger</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#logger--">logger</a></span>()</code>
<div class="block">Logger is environment dependant, it should be provided by
containing environment.</div>
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</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#onNext-org.apache.gearpump.Message-">onNext</a></span>(<a href="../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a>&nbsp;msg)</code>
<div class="block">Method called for each message received.</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/gearpump/streaming/task/TaskWrapper.html#onStart-java.time.Instant-">onStart</a></span>(java.time.Instant&nbsp;startTime)</code>
<div class="block">Method called with the task is initialized.</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/gearpump/streaming/task/TaskWrapper.html#onStop--">onStop</a></span>()</code>
<div class="block">Method called when task is under clean up.</div>
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<tr id="i10" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#onWatermarkProgress-java.time.Instant-">onWatermarkProgress</a></span>(java.time.Instant&nbsp;watermark)</code>
<div class="block">Method called on watermark update.</div>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#output-int-org.apache.gearpump.Message-">output</a></span>(int&nbsp;index,
<a href="../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a>&nbsp;msg)</code>
<div class="block">See <a href="../../../../../org/apache/gearpump/streaming/task/TaskActor.html" title="class in org.apache.gearpump.streaming.task"><code>TaskActor</code></a>
output(arrayIndex: Int, msg: Message): Unit</div>
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<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#output-org.apache.gearpump.Message-">output</a></span>(<a href="../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a>&nbsp;msg)</code>
<div class="block">This can be used to output messages to downstream tasks.</div>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#outputUnManaged-java.lang.Object-scala.collection.Seq-">outputUnManaged</a></span>(java.lang.Object&nbsp;msg,
scala.collection.Seq&lt;<a href="../../../../../org/apache/gearpump/streaming/task/TaskId.html" title="class in org.apache.gearpump.streaming.task">TaskId</a>&gt;&nbsp;tasks)</code>
<div class="block">Use with caution, output unmanaged message to target tasks</div>
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<tr id="i14" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#parallelism--">parallelism</a></span>()</code>
<div class="block">The task parallelism</div>
</td>
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<tr id="i15" class="rowColor">
<td class="colFirst"><code>scala.PartialFunction&lt;java.lang.Object,scala.runtime.BoxedUnit&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#receiveUnManagedMessage--">receiveUnManagedMessage</a></span>()</code>
<div class="block">Handlers unmanaged messages</div>
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<tr id="i16" class="altColor">
<td class="colFirst"><code>akka.actor.Cancellable</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#schedule-scala.concurrent.duration.FiniteDuration-scala.concurrent.duration.FiniteDuration-scala.Function0-">schedule</a></span>(scala.concurrent.duration.FiniteDuration&nbsp;initialDelay,
scala.concurrent.duration.FiniteDuration&nbsp;interval,
scala.Function0&lt;scala.runtime.BoxedUnit&gt;&nbsp;f)</code>&nbsp;</td>
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<tr id="i17" class="rowColor">
<td class="colFirst"><code>akka.actor.Cancellable</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#scheduleOnce-scala.concurrent.duration.FiniteDuration-scala.Function0-">scheduleOnce</a></span>(scala.concurrent.duration.FiniteDuration&nbsp;initialDelay,
scala.Function0&lt;scala.runtime.BoxedUnit&gt;&nbsp;f)</code>
<div class="block">akka.actor.ActorRefProvider.scheduleOnce</div>
</td>
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<tr id="i18" class="altColor">
<td class="colFirst"><code>akka.actor.ActorRef</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#self--">self</a></span>()</code>
<div class="block">Please don't use this if possible.</div>
</td>
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<tr id="i19" class="rowColor">
<td class="colFirst"><code>akka.actor.ActorRef</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#sender--">sender</a></span>()</code>
<div class="block">For managed message(type of Message), the sender only serve as a unique Id,
It's address is not something meaningful, you should not use this directly</div>
</td>
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<tr id="i20" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#setTaskActor-org.apache.gearpump.streaming.task.TaskActor-">setTaskActor</a></span>(<a href="../../../../../org/apache/gearpump/streaming/task/TaskActor.html" title="class in org.apache.gearpump.streaming.task">TaskActor</a>&nbsp;actor)</code>&nbsp;</td>
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<tr id="i21" class="rowColor">
<td class="colFirst"><code>akka.actor.ActorSystem</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#system--">system</a></span>()</code>
<div class="block">Please don't use this if possible</div>
</td>
</tr>
<tr id="i22" class="altColor">
<td class="colFirst"><code>java.lang.Class&lt;? extends <a href="../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#taskClass--">taskClass</a></span>()</code>&nbsp;</td>
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<tr id="i23" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskId.html" title="class in org.apache.gearpump.streaming.task">TaskId</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#taskId--">taskId</a></span>()</code>&nbsp;</td>
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<tr id="i24" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#updateWatermark-java.time.Instant-">updateWatermark</a></span>(java.time.Instant&nbsp;watermark)</code>
<div class="block">Update TaskActor with the processing progress (watermark)</div>
</td>
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<tr id="i25" class="rowColor">
<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/gearpump/streaming/task/TaskWrapper.html#upstreamMinClock--">upstreamMinClock</a></span>()</code>
<div class="block">Retrieves upstream min clock from TaskActor</div>
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<h4>TaskWrapper</h4>
<pre>public&nbsp;TaskWrapper(<a href="../../../../../org/apache/gearpump/streaming/task/TaskId.html" title="class in org.apache.gearpump.streaming.task">TaskId</a>&nbsp;taskId,
java.lang.Class&lt;? extends <a href="../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a>&gt;&nbsp;taskClass,
<a href="../../../../../org/apache/gearpump/streaming/task/TaskContextData.html" title="class in org.apache.gearpump.streaming.task">TaskContextData</a>&nbsp;context,
<a href="../../../../../org/apache/gearpump/cluster/UserConfig.html" title="class in org.apache.gearpump.cluster">UserConfig</a>&nbsp;userConf)</pre>
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<h4>taskId</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/gearpump/streaming/task/TaskId.html" title="class in org.apache.gearpump.streaming.task">TaskId</a>&nbsp;taskId()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#taskId--">taskId</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
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<pre>public&nbsp;java.lang.Class&lt;? extends <a href="../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a>&gt;&nbsp;taskClass()</pre>
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<h4>setTaskActor</h4>
<pre>public&nbsp;void&nbsp;setTaskActor(<a href="../../../../../org/apache/gearpump/streaming/task/TaskActor.html" title="class in org.apache.gearpump.streaming.task">TaskActor</a>&nbsp;actor)</pre>
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<pre>public&nbsp;int&nbsp;appId()</pre>
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<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#appId--">appId</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
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<pre>public&nbsp;java.lang.String&nbsp;appName()</pre>
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<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#appName--">appName</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
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<pre>public&nbsp;int&nbsp;executorId()</pre>
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<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#executorId--">executorId</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
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<h4>parallelism</h4>
<pre>public&nbsp;int&nbsp;parallelism()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#parallelism--">TaskContext</a></code></span></div>
<div class="block">The task parallelism
<p>
For example, we can create 3 source tasks, and 3 sink tasks,
the task parallelism is 3 for each.
<p>
This can be useful when reading from partitioned data source.
For example, for kafka, there may be 10 partitions, if we have
parallelism of 2 for this task, then each task will be responsible
to read data from 5 partitions.
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<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#parallelism--">parallelism</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the parallelism level</dd>
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<pre>public&nbsp;akka.actor.ActorRef&nbsp;appMaster()</pre>
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<div class="block">The actorRef of AppMaster</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#appMaster--">appMaster</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>application master's actor reference</dd>
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<pre>public&nbsp;void&nbsp;output(<a href="../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a>&nbsp;msg)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#output-org.apache.gearpump.Message-">TaskContext</a></code></span></div>
<div class="block">This can be used to output messages to downstream tasks. The data shuffling rule
can be decided by Partitioner.
<p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#output-org.apache.gearpump.Message-">output</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>msg</code> - message to output</dd>
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<pre>public&nbsp;void&nbsp;output(int&nbsp;index,
<a href="../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a>&nbsp;msg)</pre>
<div class="block">See <a href="../../../../../org/apache/gearpump/streaming/task/TaskActor.html" title="class in org.apache.gearpump.streaming.task"><code>TaskActor</code></a>
output(arrayIndex: Int, msg: Message): Unit
<p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>index,</code> - not same as ProcessorId</dd>
<dd><code>msg</code> - (undocumented)</dd>
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<pre>public&nbsp;void&nbsp;outputUnManaged(java.lang.Object&nbsp;msg,
scala.collection.Seq&lt;<a href="../../../../../org/apache/gearpump/streaming/task/TaskId.html" title="class in org.apache.gearpump.streaming.task">TaskId</a>&gt;&nbsp;tasks)</pre>
<div class="block">Use with caution, output unmanaged message to target tasks
<p></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>msg</code> - message to output</dd>
<dd><code>tasks</code> - the tasks to output to</dd>
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<pre>public&nbsp;akka.actor.ActorRef&nbsp;self()</pre>
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<div class="block">Please don't use this if possible.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#self--">self</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>self actor ref</dd>
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<pre>public&nbsp;akka.actor.ActorRef&nbsp;sender()</pre>
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<div class="block">For managed message(type of Message), the sender only serve as a unique Id,
It's address is not something meaningful, you should not use this directly
<p>
For unmanaged message, the sender represent the sender ActorRef</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#sender--">sender</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>sender</dd>
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<pre>public&nbsp;akka.actor.ActorSystem&nbsp;system()</pre>
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<div class="block">Please don't use this if possible</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#system--">system</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the actor system</dd>
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<pre>public&nbsp;akka.actor.ActorRef&nbsp;actorOf(akka.actor.Props&nbsp;props)</pre>
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<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#actorOf-akka.actor.Props-java.lang.String-">actorOf</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
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<pre>public&nbsp;void&nbsp;onStart(java.time.Instant&nbsp;startTime)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onStart-java.time.Instant-">TaskInterface</a></code></span></div>
<div class="block">Method called with the task is initialized.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
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<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>startTime</code> - startTime that can be used to decide from when a source producer task should
replay the data source, or from when a processor task should recover its
checkpoint data in to in-memory state.</dd>
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<pre>public&nbsp;void&nbsp;onNext(<a href="../../../../../org/apache/gearpump/Message.html" title="interface in org.apache.gearpump">Message</a>&nbsp;msg)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onNext-org.apache.gearpump.Message-">TaskInterface</a></code></span></div>
<div class="block">Method called for each message received.
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onNext-org.apache.gearpump.Message-">onNext</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html" title="interface in org.apache.gearpump.streaming.task">TaskInterface</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>msg</code> - Message send by upstream tasks</dd>
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<pre>public&nbsp;void&nbsp;onStop()</pre>
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<div class="block">Method called when task is under clean up.
<p>
This can be used to cleanup resource when the application finished.</div>
<dl>
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<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onStop--">onStop</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html" title="interface in org.apache.gearpump.streaming.task">TaskInterface</a></code></dd>
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<pre>public&nbsp;scala.PartialFunction&lt;java.lang.Object,scala.runtime.BoxedUnit&gt;&nbsp;receiveUnManagedMessage()</pre>
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<div class="block">Handlers unmanaged messages
<p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#receiveUnManagedMessage--">receiveUnManagedMessage</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html" title="interface in org.apache.gearpump.streaming.task">TaskInterface</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the handler</dd>
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<pre>public&nbsp;long&nbsp;upstreamMinClock()</pre>
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<div class="block">Retrieves upstream min clock from TaskActor
<p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#upstreamMinClock--">upstreamMinClock</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the min clock</dd>
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<pre>public&nbsp;void&nbsp;updateWatermark(java.time.Instant&nbsp;watermark)</pre>
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<div class="block">Update TaskActor with the processing progress (watermark)</div>
<dl>
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<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#updateWatermark-java.time.Instant-">updateWatermark</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>watermark</code> - (undocumented)</dd>
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<pre>public&nbsp;akka.actor.Cancellable&nbsp;schedule(scala.concurrent.duration.FiniteDuration&nbsp;initialDelay,
scala.concurrent.duration.FiniteDuration&nbsp;interval,
scala.Function0&lt;scala.runtime.BoxedUnit&gt;&nbsp;f)</pre>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#schedule-scala.concurrent.duration.FiniteDuration-scala.concurrent.duration.FiniteDuration-scala.Function0-">schedule</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
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<pre>public&nbsp;akka.actor.Cancellable&nbsp;scheduleOnce(scala.concurrent.duration.FiniteDuration&nbsp;initialDelay,
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#scheduleOnce-scala.concurrent.duration.FiniteDuration-scala.Function0-">TaskContext</a></code></span></div>
<div class="block">akka.actor.ActorRefProvider.scheduleOnce
<p></div>
<dl>
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<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#scheduleOnce-scala.concurrent.duration.FiniteDuration-scala.Function0-">scheduleOnce</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>initialDelay</code> - the initial delay</dd>
<dd><code>f</code> - the function to execute after initial delay</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the executable</dd>
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<pre>public&nbsp;org.slf4j.Logger&nbsp;logger()</pre>
<div class="block">Logger is environment dependant, it should be provided by
containing environment.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html#logger--">logger</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a></code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>(undocumented)</dd>
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<pre>public&nbsp;void&nbsp;onWatermarkProgress(java.time.Instant&nbsp;watermark)</pre>
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<div class="block">Method called on watermark update.
Usually safe to output or checkpoint states earlier than watermark.
<p></div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onWatermarkProgress-java.time.Instant-">onWatermarkProgress</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/gearpump/streaming/task/TaskInterface.html" title="interface in org.apache.gearpump.streaming.task">TaskInterface</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>watermark</code> - represents event time progress.</dd>
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