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<h1>appmaster</h1><span class="permalink">
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<ol><li name="org.apache.gearpump.streaming.appmaster.AppMaster" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="AppMasterextendsApplicationMaster"></a>
<a id="AppMaster:AppMaster"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">class</span>
</span>
<span class="symbol">
<a href="AppMaster.html"><span class="name">AppMaster</span></a><span class="result"> extends <a href="../../cluster/ApplicationMaster.html" class="extype" name="org.apache.gearpump.cluster.ApplicationMaster">ApplicationMaster</a></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">AppMaster is the head of a streaming application.</p><div class="fullcomment"><div class="comment cmt"><p>AppMaster is the head of a streaming application.</p><p>It contains:</p><ol class="decimal"><li>ExecutorManager to manage all executors.
2. TaskManager to manage all tasks,
3. ClockService to track the global clock for this streaming application.
4. Scheduler to decide which a task should be scheduled to.
</li></ol></div></div>
</li><li name="org.apache.gearpump.streaming.appmaster.ClockService" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
<a id="ClockServiceextendsActorwithStash"></a>
<a id="ClockService:ClockService"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">class</span>
</span>
<span class="symbol">
<a href="ClockService.html"><span class="name">ClockService</span></a><span class="result"> extends <span class="extype" name="akka.actor.Actor">Actor</span> with <span class="extype" name="akka.actor.Stash">Stash</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">Maintains a global view of message timestamp in the application
</p>
</li><li name="org.apache.gearpump.streaming.appmaster.DagManager" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="DagManagerextendsActorwithStash"></a>
<a id="DagManager:DagManager"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">class</span>
</span>
<span class="symbol">
<a href="DagManager.html"><span class="name">DagManager</span></a><span class="result"> extends <span class="extype" name="akka.actor.Actor">Actor</span> with <span class="extype" name="akka.actor.Stash">Stash</span></span>
</span>
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<p class="shortcomment cmt">Handles dag modification and other stuff related with DAG</p><div class="fullcomment"><div class="comment cmt"><p>Handles dag modification and other stuff related with DAG</p><p>DagManager maintains multiple version of DAGs. For each version, the DAG is immutable.
For operations like modifying a processor, it will create a new version of DAG.
</p></div></div>
</li><li name="org.apache.gearpump.streaming.appmaster.JarScheduler" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="JarSchedulerextendsAnyRef"></a>
<a id="JarScheduler:JarScheduler"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">class</span>
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<a href="JarScheduler.html"><span class="name">JarScheduler</span></a><span class="result"> extends <span class="extype" name="scala.AnyRef">AnyRef</span></span>
</span>
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<p class="shortcomment cmt">Different processors of the stream application can use different jars.</p><div class="fullcomment"><div class="comment cmt"><p>Different processors of the stream application can use different jars. JarScheduler is the
scheduler for different jars.</p><p>For a DAG of multiple processors, each processor can have its own jar. Tasks of same jar
is scheduled by TaskScheduler, and TaskSchedulers are scheduled by JarScheduler.</p><p>In runtime, the implementation is delegated to actor JarSchedulerImpl
</p></div></div>
</li><li name="org.apache.gearpump.streaming.appmaster.ProcessorSummary" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
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<span class="kind">case class</span>
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<a href="StreamAppMasterSummary.html"><span class="name">StreamAppMasterSummary</span></a><span class="params">(<span name="appType">appType: <span class="extype" name="scala.Predef.String">String</span> = <span class="symbol">&quot;streaming&quot;</span></span>, <span name="appId">appId: <span class="extype" name="scala.Int">Int</span></span>, <span name="appName">appName: <span class="extype" name="scala.Predef.String">String</span> = <span class="symbol">null</span></span>, <span name="actorPath">actorPath: <span class="extype" name="scala.Predef.String">String</span> = <span class="symbol">null</span></span>, <span name="clock">clock: <a href="../../package.html#TimeStamp=Long" class="extmbr" name="org.apache.gearpump.TimeStamp">TimeStamp</a> = <span class="symbol">0L</span></span>, <span name="status">status: <a href="../../cluster/ApplicationStatus.html" class="extype" name="org.apache.gearpump.cluster.ApplicationStatus">ApplicationStatus</a> = <span class="symbol"><span class="name"><a href="../../../../package.html">ApplicationStatus.ACTIVE</a></span></span></span>, <span name="startTime">startTime: <a href="../../package.html#TimeStamp=Long" class="extmbr" name="org.apache.gearpump.TimeStamp">TimeStamp</a> = <span class="symbol">0L</span></span>, <span name="uptime">uptime: <a href="../../package.html#TimeStamp=Long" class="extmbr" name="org.apache.gearpump.TimeStamp">TimeStamp</a> = <span class="symbol">0L</span></span>, <span name="user">user: <span class="extype" name="scala.Predef.String">String</span> = <span class="symbol">null</span></span>, <span name="homeDirectory">homeDirectory: <span class="extype" name="scala.Predef.String">String</span> = <span class="symbol">&quot;&quot;</span></span>, <span name="logFile">logFile: <span class="extype" name="scala.Predef.String">String</span> = <span class="symbol">&quot;&quot;</span></span>, <span name="dag">dag: <a href="../../util/Graph.html" class="extype" name="org.apache.gearpump.util.Graph">Graph</a>[<a href="../package.html#ProcessorId=Int" class="extmbr" name="org.apache.gearpump.streaming.ProcessorId">ProcessorId</a>, <span class="extype" name="scala.Predef.String">String</span>] = <span class="symbol">null</span></span>, <span name="executors">executors: <span class="extype" name="scala.List">List</span>[<a href="AppMaster$$ExecutorBrief.html" class="extype" name="org.apache.gearpump.streaming.appmaster.AppMaster.ExecutorBrief">ExecutorBrief</a>] = <span class="symbol">null</span></span>, <span name="processors">processors: <span class="extype" name="scala.Predef.Map">Map</span>[<a href="../package.html#ProcessorId=Int" class="extmbr" name="org.apache.gearpump.streaming.ProcessorId">ProcessorId</a>, <a href="ProcessorSummary.html" class="extype" name="org.apache.gearpump.streaming.appmaster.ProcessorSummary">ProcessorSummary</a>] = <span class="defval" name="Map.empty[ProcessorId, ProcessorSummary]">...</span></span>, <span name="processorLevels">processorLevels: <span class="extype" name="scala.Predef.Map">Map</span>[<a href="../package.html#ProcessorId=Int" class="extmbr" name="org.apache.gearpump.streaming.ProcessorId">ProcessorId</a>, <span class="extype" name="scala.Int">Int</span>] = <span class="symbol">Map.empty[ProcessorId, Int]</span></span>, <span name="historyMetricsConfig">historyMetricsConfig: <a href="../../util/HistoryMetricsService$$HistoryMetricsConfig.html" class="extype" name="org.apache.gearpump.util.HistoryMetricsService.HistoryMetricsConfig">HistoryMetricsConfig</a> = <span class="symbol">null</span></span>)</span><span class="result"> extends <a href="../../cluster/AppMasterToMaster$$AppMasterSummary.html" class="extype" name="org.apache.gearpump.cluster.AppMasterToMaster.AppMasterSummary">AppMasterSummary</a> with <span class="extype" name="scala.Product">Product</span> with <span class="extype" name="scala.Serializable">Serializable</span></span>
</span>
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<p class="shortcomment cmt">Stream application summary, used for REST API</p>
</li><li name="org.apache.gearpump.streaming.appmaster.TaskCount" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
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<a href="TaskCount.html"><span class="name">TaskCount</span></a><span class="params">(<span name="count">count: <span class="extype" name="scala.Int">Int</span></span>)</span><span class="result"> extends <span class="extype" name="scala.Product">Product</span> with <span class="extype" name="scala.Serializable">Serializable</span></span>
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</li><li name="org.apache.gearpump.streaming.appmaster.TaskLocator" visbl="pub" data-isabs="false" fullComment="yes" group="Ungrouped">
<a id="TaskLocatorextendsAnyRef"></a>
<a id="TaskLocator:TaskLocator"></a>
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<span class="kind">class</span>
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<a href="TaskLocator.html"><span class="name">TaskLocator</span></a><span class="result"> extends <span class="extype" name="scala.AnyRef">AnyRef</span></span>
</span>
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<p class="shortcomment cmt">TaskLocator is used to decide which machine one task should run on.</p><div class="fullcomment"><div class="comment cmt"><p>TaskLocator is used to decide which machine one task should run on.</p><p>User can config <a href="../Constants$.html#GEARPUMP_STREAMING_LOCALITIES:String" class="extmbr" name="org.apache.gearpump.streaming.Constants#GEARPUMP_STREAMING_LOCALITIES">org.apache.gearpump.streaming.Constants#GEARPUMP_STREAMING_LOCALITIES</a> to
decide to control which machine the task is running on.
</p></div></div>
</li><li name="org.apache.gearpump.streaming.appmaster.TaskRegistry" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
<a id="TaskRegistryextendsAnyRef"></a>
<a id="TaskRegistry:TaskRegistry"></a>
<h4 class="signature">
<span class="modifier_kind">
<span class="modifier"></span>
<span class="kind">class</span>
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<span class="symbol">
<a href="TaskRegistry.html"><span class="name">TaskRegistry</span></a><span class="result"> extends <span class="extype" name="scala.AnyRef">AnyRef</span></span>
</span>
</h4><span class="permalink">
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<p class="shortcomment cmt">Tracks the registration of all tasks, when the application is booting up.</p>
</li><li name="org.apache.gearpump.streaming.appmaster.TaskScheduler" visbl="pub" data-isabs="true" fullComment="yes" group="Ungrouped">
<a id="TaskSchedulerextendsAnyRef"></a>
<a id="TaskScheduler:TaskScheduler"></a>
<h4 class="signature">
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<a href="TaskScheduler.html"><span class="name">TaskScheduler</span></a><span class="result"> extends <span class="extype" name="scala.AnyRef">AnyRef</span></span>
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<p class="shortcomment cmt">Schedules tasks to run for new allocated resources.</p><div class="fullcomment"><div class="comment cmt"><p>Schedules tasks to run for new allocated resources. TaskScheduler only schedule tasks that
share the same jar. For scheduling for multiple jars, see
<a href="JarScheduler.html" class="extype" name="org.apache.gearpump.streaming.appmaster.JarScheduler">org.apache.gearpump.streaming.appmaster.JarScheduler</a>.
</p></div></div>
</li><li name="org.apache.gearpump.streaming.appmaster.TaskSchedulerImpl" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
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</span>
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</li></ol>
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<div id="values" class="values members">
<h3>Value Members</h3>
<ol><li name="org.apache.gearpump.streaming.appmaster.AppMaster" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
<a id="AppMaster"></a>
<a id="AppMaster:AppMaster"></a>
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</li><li name="org.apache.gearpump.streaming.appmaster.ClockService" visbl="pub" data-isabs="false" fullComment="no" group="Ungrouped">
<a id="ClockService"></a>
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