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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.heron.instance.spout</a></div> |
| <h2 title="Class SpoutInstance" class="title">Class SpoutInstance</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <ul class="inheritance"> |
| <li>org.apache.heron.instance.spout.SpoutInstance</li> |
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| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="../../simulator/instance/SpoutInstance.html" title="class in org.apache.heron.simulator.instance">SpoutInstance</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public class <span class="typeNameLabel">SpoutInstance</span> |
| extends java.lang.Object |
| implements <a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></pre> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="SpoutOutputCollectorImpl.html" title="class in org.apache.heron.instance.spout">SpoutOutputCollectorImpl</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#collector">collector</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../../api/spout/ISpout.html" title="interface in org.apache.heron.api.spout">ISpout</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#spout">spout</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../common/utils/metrics/ISpoutMetrics.html" title="interface in org.apache.heron.common.utils.metrics">ISpoutMetrics</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#spoutMetrics">spoutMetrics</a></span></code></th> |
| <td class="colLast"> </td> |
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| <tr> |
| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(org.apache.heron.common.utils.misc.PhysicalPlanHelper,org.apache.heron.common.basics.Communicator,org.apache.heron.common.basics.Communicator,org.apache.heron.common.basics.ExecutorLooper)">SpoutInstance</a></span>​(<a href="../../common/utils/misc/PhysicalPlanHelper.html" title="class in org.apache.heron.common.utils.misc">PhysicalPlanHelper</a> helper, |
| <a href="../../common/basics/Communicator.html" title="class in org.apache.heron.common.basics">Communicator</a><com.google.protobuf.Message> streamInQueue, |
| <a href="../../common/basics/Communicator.html" title="class in org.apache.heron.common.basics">Communicator</a><com.google.protobuf.Message> streamOutQueue, |
| <a href="../../common/basics/ExecutorLooper.html" title="class in org.apache.heron.common.basics">ExecutorLooper</a> looper)</code></th> |
| <td class="colLast"> |
| <div class="block">Construct a SpoutInstance basing on given arguments</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</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="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#activate()">activate</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Activate the instance</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clean()">clean</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Clean the instance.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#deactivate()">deactivate</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Deactivate the instance</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#init(org.apache.heron.api.state.State)">init</a></span>​(<a href="../../api/state/State.html" title="interface in org.apache.heron.api.state">State</a><java.io.Serializable,​java.io.Serializable> state)</code></th> |
| <td class="colLast"> |
| <div class="block">Initialize the instance.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#onCheckpointSaved(java.lang.String)">onCheckpointSaved</a></span>​(java.lang.String checkpointId)</code></th> |
| <td class="colLast"> |
| <div class="block">Inform the Instance that a particular checkpoint has become globally consistent</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#persistState(java.lang.String)">persistState</a></span>​(java.lang.String checkpointId)</code></th> |
| <td class="colLast"> |
| <div class="block">Save the state and send it out for persistence</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#preRestore(java.lang.String)">preRestore</a></span>​(java.lang.String checkpointId)</code></th> |
| <td class="colLast"> |
| <div class="block">Inform the Instance that the framework will clean, stop, and delete the instance |
| in order to restore its state to a previously-saved checkpoint.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#produceTuple()">produceTuple</a></span>()</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readTuplesAndExecute(org.apache.heron.common.basics.Communicator)">readTuplesAndExecute</a></span>​(<a href="../../common/basics/Communicator.html" title="class in org.apache.heron.common.basics">Communicator</a><com.google.protobuf.Message> inQueue)</code></th> |
| <td class="colLast"> |
| <div class="block">Read tuples from a queue and process the tuples</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#shutdown()">shutdown</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Destroy the whole IInstance.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#start()">start</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Start the execution of the IInstance</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#update(org.apache.heron.common.utils.misc.PhysicalPlanHelper)">update</a></span>​(<a href="../../common/utils/misc/PhysicalPlanHelper.html" title="class in org.apache.heron.common.utils.misc">PhysicalPlanHelper</a> physicalPlanHelper)</code></th> |
| <td class="colLast"> |
| <div class="block">Update the instance.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| </li> |
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| <a id="spout"> |
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| <li class="blockList"> |
| <h4>spout</h4> |
| <pre>protected final <a href="../../api/spout/ISpout.html" title="interface in org.apache.heron.api.spout">ISpout</a> spout</pre> |
| </li> |
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| <a id="collector"> |
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| <li class="blockList"> |
| <h4>collector</h4> |
| <pre>protected final <a href="SpoutOutputCollectorImpl.html" title="class in org.apache.heron.instance.spout">SpoutOutputCollectorImpl</a> collector</pre> |
| </li> |
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| <h4>spoutMetrics</h4> |
| <pre>protected final <a href="../../common/utils/metrics/ISpoutMetrics.html" title="interface in org.apache.heron.common.utils.metrics">ISpoutMetrics</a> spoutMetrics</pre> |
| </li> |
| </ul> |
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| <section> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a id="<init>(org.apache.heron.common.utils.misc.PhysicalPlanHelper,org.apache.heron.common.basics.Communicator,org.apache.heron.common.basics.Communicator,org.apache.heron.common.basics.ExecutorLooper)"> |
| <!-- --> |
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| <h4>SpoutInstance</h4> |
| <pre>public SpoutInstance​(<a href="../../common/utils/misc/PhysicalPlanHelper.html" title="class in org.apache.heron.common.utils.misc">PhysicalPlanHelper</a> helper, |
| <a href="../../common/basics/Communicator.html" title="class in org.apache.heron.common.basics">Communicator</a><com.google.protobuf.Message> streamInQueue, |
| <a href="../../common/basics/Communicator.html" title="class in org.apache.heron.common.basics">Communicator</a><com.google.protobuf.Message> streamOutQueue, |
| <a href="../../common/basics/ExecutorLooper.html" title="class in org.apache.heron.common.basics">ExecutorLooper</a> looper)</pre> |
| <div class="block">Construct a SpoutInstance basing on given arguments</div> |
| </li> |
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| </li> |
| </ul> |
| </section> |
| <!-- ============ METHOD DETAIL ========== --> |
| <section> |
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| <h4>update</h4> |
| <pre class="methodSignature">public void update​(<a href="../../common/utils/misc/PhysicalPlanHelper.html" title="class in org.apache.heron.common.utils.misc">PhysicalPlanHelper</a> physicalPlanHelper)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#update(org.apache.heron.common.utils.misc.PhysicalPlanHelper)">IInstance</a></code></span></div> |
| <div class="block">Update the instance. This happens when the physical plan changes (e.g., during a scaling event)</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#update(org.apache.heron.common.utils.misc.PhysicalPlanHelper)">update</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
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| <h4>persistState</h4> |
| <pre class="methodSignature">public void persistState​(java.lang.String checkpointId)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#persistState(java.lang.String)">IInstance</a></code></span></div> |
| <div class="block">Save the state and send it out for persistence</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#persistState(java.lang.String)">persistState</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
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| <h4>init</h4> |
| <pre class="methodSignature">public void init​(<a href="../../api/state/State.html" title="interface in org.apache.heron.api.state">State</a><java.io.Serializable,​java.io.Serializable> state)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#init(org.apache.heron.api.state.State)">IInstance</a></code></span></div> |
| <div class="block">Initialize the instance. If it's a stateful topology, |
| the provided state will be used for initialization. |
| For non-stateful topology, the state will be ignored.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#init(org.apache.heron.api.state.State)">init</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>state</code> - used for stateful topology to initialize the instance state</dd> |
| </dl> |
| </li> |
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| <h4>start</h4> |
| <pre class="methodSignature">public void start()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#start()">IInstance</a></code></span></div> |
| <div class="block">Start the execution of the IInstance</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#start()">start</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
| </dl> |
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| </ul> |
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| <h4>preRestore</h4> |
| <pre class="methodSignature">public void preRestore​(java.lang.String checkpointId)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#preRestore(java.lang.String)">IInstance</a></code></span></div> |
| <div class="block">Inform the Instance that the framework will clean, stop, and delete the instance |
| in order to restore its state to a previously-saved checkpoint.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#preRestore(java.lang.String)">preRestore</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>checkpointId</code> - the ID of the checkpoint the instance will be restoring to</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="onCheckpointSaved(java.lang.String)"> |
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| <h4>onCheckpointSaved</h4> |
| <pre class="methodSignature">public void onCheckpointSaved​(java.lang.String checkpointId)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#onCheckpointSaved(java.lang.String)">IInstance</a></code></span></div> |
| <div class="block">Inform the Instance that a particular checkpoint has become globally consistent</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#onCheckpointSaved(java.lang.String)">onCheckpointSaved</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>checkpointId</code> - the ID of the checkpoint that became globally consistent</dd> |
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| <h4>clean</h4> |
| <pre class="methodSignature">public void clean()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#clean()">IInstance</a></code></span></div> |
| <div class="block">Clean the instance. After it's called, the IInstance |
| will be still alive but with an empty state. Before |
| starting the IInstance again, an `init()` call is needed |
| to initialize the instance properly.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#clean()">clean</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
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| <h4>shutdown</h4> |
| <pre class="methodSignature">public void shutdown()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#shutdown()">IInstance</a></code></span></div> |
| <div class="block">Destroy the whole IInstance. |
| Notice: It should only be called when the whole program is |
| exiting. And in fact, this method should never be called.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#shutdown()">shutdown</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
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| <h4>activate</h4> |
| <pre class="methodSignature">public void activate()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#activate()">IInstance</a></code></span></div> |
| <div class="block">Activate the instance</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#activate()">activate</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
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| <div class="block">Deactivate the instance</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#deactivate()">deactivate</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
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| <h4>produceTuple</h4> |
| <pre class="methodSignature">protected void produceTuple()</pre> |
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| <h4>readTuplesAndExecute</h4> |
| <pre class="methodSignature">public void readTuplesAndExecute​(<a href="../../common/basics/Communicator.html" title="class in org.apache.heron.common.basics">Communicator</a><com.google.protobuf.Message> inQueue)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../IInstance.html#readTuplesAndExecute(org.apache.heron.common.basics.Communicator)">IInstance</a></code></span></div> |
| <div class="block">Read tuples from a queue and process the tuples</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../IInstance.html#readTuplesAndExecute(org.apache.heron.common.basics.Communicator)">readTuplesAndExecute</a></code> in interface <code><a href="../IInstance.html" title="interface in org.apache.heron.instance">IInstance</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>inQueue</code> - the queue to read tuples from</dd> |
| </dl> |
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