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<p id="owner"><a href="../../../package.html" class="extype" name="io">io</a>.<a href="../../package.html" class="extype" name="io.gearpump">gearpump</a>.<a href="../package.html" class="extype" name="io.gearpump.streaming">streaming</a>.<a href="package.html" class="extype" name="io.gearpump.streaming.task">task</a></p>
<h1>TaskWrapper</h1><h3><span class="morelinks"><div>Related Doc:
<a href="package.html" class="extype" name="io.gearpump.streaming.task">package task</a>
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<span class="name">TaskWrapper</span><span class="result"> extends <a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a> with <a href="TaskInterface.html" class="extype" name="io.gearpump.streaming.task.TaskInterface">TaskInterface</a></span>
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<div id="comment" class="fullcommenttop"><div class="comment cmt"><p>This provides TaskContext for user defined tasks</p></div><div class="toggleContainer block">
<span class="toggle">Linear Supertypes</span>
<div class="superTypes hiddenContent"><a href="TaskInterface.html" class="extype" name="io.gearpump.streaming.task.TaskInterface">TaskInterface</a>, <a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a>, <span class="extype" name="scala.AnyRef">AnyRef</span>, <span class="extype" name="scala.Any">Any</span></div>
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<li class="in" name="io.gearpump.streaming.task.TaskWrapper"><span>TaskWrapper</span></li><li class="in" name="io.gearpump.streaming.task.TaskInterface"><span>TaskInterface</span></li><li class="in" name="io.gearpump.streaming.task.TaskContext"><span>TaskContext</span></li><li class="in" name="scala.AnyRef"><span>AnyRef</span></li><li class="in" name="scala.Any"><span>Any</span></li>
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<h3>Instance Constructors</h3>
<ol><li name="io.gearpump.streaming.task.TaskWrapper#&lt;init&gt;" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="&lt;init&gt;(taskId:io.gearpump.streaming.task.TaskId,taskClass:Class[_&lt;:io.gearpump.streaming.task.Task],context:io.gearpump.streaming.task.TaskContextData,userConf:io.gearpump.cluster.UserConfig):io.gearpump.streaming.task.TaskWrapper"></a>
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<p class="shortcomment cmt"></p><div class="fullcomment"><div class="comment cmt"></div><dl class="paramcmts block"><dt class="param">taskClass</dt><dd class="cmt"><p>task class</p></dd><dt class="param">context</dt><dd class="cmt"><p>context class</p></dd><dt class="param">userConf</dt><dd class="cmt"><p>user config
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<div class="fullcomment"><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
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<div class="fullcomment"><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
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<p class="shortcomment cmt">The actorRef of AppMaster</p><div class="fullcomment"><div class="comment cmt"><p>The actorRef of AppMaster</p></div><dl class="paramcmts block"><dt>returns</dt><dd class="cmt"><p>application master's actor reference
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<span class="name">isInstanceOf</span><span class="tparams">[<span name="T0">T0</span>]</span><span class="result">: <span class="extype" name="scala.Boolean">Boolean</span></span>
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<a id="ne(x$1:AnyRef):Boolean"></a>
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<h4 class="signature">
<span class="modifier_kind">
<span class="modifier">final </span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">ne</span><span class="params">(<span name="arg0">arg0: <span class="extype" name="scala.AnyRef">AnyRef</span></span>)</span><span class="result">: <span class="extype" name="scala.Boolean">Boolean</span></span>
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<a id="notify():Unit"></a>
<a id="notify():Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier">final </span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">notify</span><span class="params">()</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
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<a id="notifyAll():Unit"></a>
<a id="notifyAll():Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier">final </span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">notifyAll</span><span class="params">()</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
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<div class="fullcomment"><dl class="attributes block"> <dt>Definition Classes</dt><dd>AnyRef</dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#onNext" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="onNext(msg:io.gearpump.Message):Unit"></a>
<a id="onNext(Message):Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">onNext</span><span class="params">(<span name="msg">msg: <a href="../../Message.html" class="extype" name="io.gearpump.Message">Message</a></span>)</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
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<p class="shortcomment cmt">Method called for each message received.</p><div class="fullcomment"><div class="comment cmt"><p>Method called for each message received.</p></div><dl class="paramcmts block"><dt class="param">msg</dt><dd class="cmt"><p>message send by upstream tasks
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskInterface.html" class="extype" name="io.gearpump.streaming.task.TaskInterface">TaskInterface</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#onStart" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="onStart(startTime:io.gearpump.streaming.task.StartTime):Unit"></a>
<a id="onStart(StartTime):Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">onStart</span><span class="params">(<span name="startTime">startTime: <a href="StartTime.html" class="extype" name="io.gearpump.streaming.task.StartTime">StartTime</a></span>)</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">Method called with the task is initialized.</p><div class="fullcomment"><div class="comment cmt"><p>Method called with the task is initialized.</p></div><dl class="paramcmts block"><dt class="param">startTime</dt><dd class="cmt"><p>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.
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskInterface.html" class="extype" name="io.gearpump.streaming.task.TaskInterface">TaskInterface</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#onStop" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="onStop():Unit"></a>
<a id="onStop():Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">onStop</span><span class="params">()</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">Method called when task is under clean up.</p><div class="fullcomment"><div class="comment cmt"><p>Method called when task is under clean up.
This can be used to cleanup resource when the application finished.
</p></div><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskInterface.html" class="extype" name="io.gearpump.streaming.task.TaskInterface">TaskInterface</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#output" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="output(msg:io.gearpump.Message):Unit"></a>
<a id="output(Message):Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">output</span><span class="params">(<span name="msg">msg: <a href="../../Message.html" class="extype" name="io.gearpump.Message">Message</a></span>)</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">This can be used to output messages to downstream tasks.</p><div class="fullcomment"><div class="comment cmt"><p>This can be used to output messages to downstream tasks.
The data shuffling rule can be decided by Partitioner.</p></div><dl class="paramcmts block"><dt class="param">msg</dt><dd class="cmt"><p>message to output
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#outputUnManaged" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="outputUnManaged(msg:AnyRef,tasks:io.gearpump.streaming.task.TaskId*):Unit"></a>
<a id="outputUnManaged(AnyRef,TaskId*):Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">outputUnManaged</span><span class="params">(<span name="msg">msg: <span class="extype" name="scala.AnyRef">AnyRef</span></span>, <span name="tasks">tasks: <a href="TaskId.html" class="extype" name="io.gearpump.streaming.task.TaskId">TaskId</a>*</span>)</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
</h4><span class="permalink">
<a href="../../../../index.html#io.gearpump.streaming.task.TaskWrapper@outputUnManaged(msg:AnyRef,tasks:io.gearpump.streaming.task.TaskId*):Unit" title="Permalink" target="_top">
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</span>
<p class="shortcomment cmt">Use with caution, output unmanaged message to target tasks</p><div class="fullcomment"><div class="comment cmt"><p>Use with caution, output unmanaged message to target tasks</p></div><dl class="paramcmts block"><dt class="param">msg</dt><dd class="cmt"><p>message to output</p></dd><dt class="param">tasks</dt><dd class="cmt"><p>the tasks to output to
</p></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#parallelism" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="parallelism:Int"></a>
<a id="parallelism:Int"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">parallelism</span><span class="result">: <span class="extype" name="scala.Int">Int</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">The task parallelism</p><div class="fullcomment"><div class="comment cmt"><p>The task parallelism</p><p>For example, we can create 3 source tasks, and 3 sink tasks,
the task parallelism is 3 for each.</p><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.
</p></div><dl class="paramcmts block"><dt>returns</dt><dd class="cmt"><p>the parallelism level
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#receiveUnManagedMessage" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="receiveUnManagedMessage:akka.actor.Actor.Receive"></a>
<a id="receiveUnManagedMessage:Receive"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">receiveUnManagedMessage</span><span class="result">: <span class="extype" name="akka.actor.Actor.Receive">Receive</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">handler for unmanaged message</p><div class="fullcomment"><div class="comment cmt"><p>handler for unmanaged message</p></div><dl class="paramcmts block"><dt>returns</dt><dd class="cmt"><p>the handler
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskInterface.html" class="extype" name="io.gearpump.streaming.task.TaskInterface">TaskInterface</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#schedule" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="schedule(initialDelay:scala.concurrent.duration.FiniteDuration,interval:scala.concurrent.duration.FiniteDuration)(f:=&gt;Unit):akka.actor.Cancellable"></a>
<a id="schedule(FiniteDuration,FiniteDuration)(⇒Unit):Cancellable"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">schedule</span><span class="params">(<span name="initialDelay">initialDelay: <span class="extype" name="scala.concurrent.duration.FiniteDuration">FiniteDuration</span></span>, <span name="interval">interval: <span class="extype" name="scala.concurrent.duration.FiniteDuration">FiniteDuration</span></span>)</span><span class="params">(<span name="f">f: ⇒ <span class="extype" name="scala.Unit">Unit</span></span>)</span><span class="result">: <span class="extype" name="akka.actor.Cancellable">Cancellable</span></span>
</span>
</h4><span class="permalink">
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<div class="fullcomment"><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#scheduleOnce" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="scheduleOnce(initialDelay:scala.concurrent.duration.FiniteDuration)(f:=&gt;Unit):akka.actor.Cancellable"></a>
<a id="scheduleOnce(FiniteDuration)(⇒Unit):Cancellable"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">scheduleOnce</span><span class="params">(<span name="initialDelay">initialDelay: <span class="extype" name="scala.concurrent.duration.FiniteDuration">FiniteDuration</span></span>)</span><span class="params">(<span name="f">f: ⇒ <span class="extype" name="scala.Unit">Unit</span></span>)</span><span class="result">: <span class="extype" name="akka.actor.Cancellable">Cancellable</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">akka.actor.ActorRefProvider.scheduleOnce</p><div class="fullcomment"><div class="comment cmt"><p>akka.actor.ActorRefProvider.scheduleOnce</p></div><dl class="paramcmts block"><dt class="param">initialDelay</dt><dd class="cmt"><p>the initial delay</p></dd><dt class="param">f</dt><dd class="cmt"><p>the function to execute after initial delay</p></dd><dt>returns</dt><dd class="cmt"><p>the executable
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#self" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="self:akka.actor.ActorRef"></a>
<a id="self:ActorRef"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">self</span><span class="result">: <span class="extype" name="akka.actor.ActorRef">ActorRef</span></span>
</span>
</h4><span class="permalink">
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</span>
<p class="shortcomment cmt">Please don't use this if possible.</p><div class="fullcomment"><div class="comment cmt"><p>Please don't use this if possible.</p></div><dl class="paramcmts block"><dt>returns</dt><dd class="cmt"><p>self actor ref
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#sender" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="sender:akka.actor.ActorRef"></a>
<a id="sender:ActorRef"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">sender</span><span class="result">: <span class="extype" name="akka.actor.ActorRef">ActorRef</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">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><div class="fullcomment"><div class="comment cmt"><p>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><p>For unmanaged message, the sender represent the sender ActorRef</p></div><dl class="paramcmts block"><dt>returns</dt><dd class="cmt"><p>sender
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#setTaskActor" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
<a id="setTaskActor(actor:io.gearpump.streaming.task.TaskActor):Unit"></a>
<a id="setTaskActor(TaskActor):Unit"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">setTaskActor</span><span class="params">(<span name="actor">actor: <a href="TaskActor.html" class="extype" name="io.gearpump.streaming.task.TaskActor">TaskActor</a></span>)</span><span class="result">: <span class="extype" name="scala.Unit">Unit</span></span>
</span>
</h4><span class="permalink">
<a href="../../../../index.html#io.gearpump.streaming.task.TaskWrapper@setTaskActor(actor:io.gearpump.streaming.task.TaskActor):Unit" title="Permalink" target="_top">
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</li><li name="scala.AnyRef#synchronized" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="synchronized[T0](x$1:=&gt;T0):T0"></a>
<a id="synchronized[T0](⇒T0):T0"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier">final </span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">synchronized</span><span class="tparams">[<span name="T0">T0</span>]</span><span class="params">(<span name="arg0">arg0: ⇒ <span class="extype" name="java.lang.AnyRef.synchronized.T0">T0</span></span>)</span><span class="result">: <span class="extype" name="java.lang.AnyRef.synchronized.T0">T0</span></span>
</span>
</h4><span class="permalink">
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<div class="fullcomment"><dl class="attributes block"> <dt>Definition Classes</dt><dd>AnyRef</dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#system" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="system:akka.actor.ActorSystem"></a>
<a id="system:ActorSystem"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">def</span>
</span>
<span class="symbol">
<span class="name">system</span><span class="result">: <span class="extype" name="akka.actor.ActorSystem">ActorSystem</span></span>
</span>
</h4><span class="permalink">
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</span>
<p class="shortcomment cmt">Please don't use this if possible</p><div class="fullcomment"><div class="comment cmt"><p>Please don't use this if possible</p></div><dl class="paramcmts block"><dt>returns</dt><dd class="cmt"><p>the actor system
</p></dd></dl><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
</li><li name="io.gearpump.streaming.task.TaskWrapper#taskId" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="taskId:io.gearpump.streaming.task.TaskId"></a>
<a id="taskId:TaskId"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">val</span>
</span>
<span class="symbol">
<span class="name">taskId</span><span class="result">: <a href="TaskId.html" class="extype" name="io.gearpump.streaming.task.TaskId">TaskId</a></span>
</span>
</h4><span class="permalink">
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<div class="fullcomment"><dl class="attributes block"> <dt>Definition Classes</dt><dd><a href="" class="extype" name="io.gearpump.streaming.task.TaskWrapper">TaskWrapper</a><a href="TaskContext.html" class="extype" name="io.gearpump.streaming.task.TaskContext">TaskContext</a></dd></dl></div>
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<p class="shortcomment cmt">retrieve upstream min clock from TaskActor</p><div class="fullcomment"><div class="comment cmt"><p>retrieve upstream min clock from TaskActor</p></div><dl class="paramcmts block"><dt>returns</dt><dd class="cmt"><p>the min clock
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