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| <h2 title="Class WordSpout" class="title">Class WordSpout</h2> |
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| <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> |
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| <li>org.apache.storm.redis.topology.WordSpout</li> |
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| <pre>public class <span class="typeNameLabel">WordSpout</span> |
| 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> |
| implements <a href="../../../../../org/apache/storm/topology/IRichSpout.html" title="interface in org.apache.storm.topology">IRichSpout</a></pre> |
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| <dd><a href="../../../../../serialized-form.html#org.apache.storm.redis.topology.WordSpout">Serialized Form</a></dd> |
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| <td class="colFirst"><code>static <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/storm/redis/topology/WordSpout.html#words">words</a></span></code> </td> |
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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/storm/redis/topology/WordSpout.html#WordSpout--">WordSpout</a></span>()</code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/redis/topology/WordSpout.html#WordSpout-boolean-">WordSpout</a></span>(boolean isDistributed)</code> </td> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <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> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/redis/topology/WordSpout.html#ack-java.lang.Object-">ack</a></span>(<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> msgId)</code> |
| <div class="block">Storm has determined that the tuple emitted by this spout with the msgId identifier has been fully processed.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/redis/topology/WordSpout.html#activate--">activate</a></span>()</code> |
| <div class="block">Called when a spout has been activated out of a deactivated mode.</div> |
| </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/storm/redis/topology/WordSpout.html#close--">close</a></span>()</code> |
| <div class="block">Called when an ISpout is going to be shutdown.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/redis/topology/WordSpout.html#deactivate--">deactivate</a></span>()</code> |
| <div class="block">Called when a spout has been deactivated.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/redis/topology/WordSpout.html#declareOutputFields-org.apache.storm.topology.OutputFieldsDeclarer-">declareOutputFields</a></span>(<a href="../../../../../org/apache/storm/topology/OutputFieldsDeclarer.html" title="interface in org.apache.storm.topology">OutputFieldsDeclarer</a> declarer)</code> |
| <div class="block">Declare the output schema for all the streams of this topology.</div> |
| </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/storm/redis/topology/WordSpout.html#fail-java.lang.Object-">fail</a></span>(<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> msgId)</code> |
| <div class="block">The tuple emitted by this spout with the msgId identifier has failed to be fully processed.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<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="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/storm/redis/topology/WordSpout.html#getComponentConfiguration--">getComponentConfiguration</a></span>()</code> |
| <div class="block">Declare configuration specific to this component.</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/storm/redis/topology/WordSpout.html#isDistributed--">isDistributed</a></span>()</code> </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/storm/redis/topology/WordSpout.html#nextTuple--">nextTuple</a></span>()</code> |
| <div class="block">When this method is called, Storm is requesting that the Spout emit tuples to the output collector.</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/storm/redis/topology/WordSpout.html#open-java.util.Map-org.apache.storm.task.TopologyContext-org.apache.storm.spout.SpoutOutputCollector-">open</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<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="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>> conf, |
| <a href="../../../../../org/apache/storm/task/TopologyContext.html" title="class in org.apache.storm.task">TopologyContext</a> context, |
| <a href="../../../../../org/apache/storm/spout/SpoutOutputCollector.html" title="class in org.apache.storm.spout">SpoutOutputCollector</a> collector)</code> |
| <div class="block">Called when a task for this component is initialized within a worker on the cluster.</div> |
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| <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#toString--" title="class or interface in java.lang">toString</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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| <pre>public static final <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>[] words</pre> |
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| <h4>WordSpout</h4> |
| <pre>public WordSpout()</pre> |
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| <pre>public WordSpout(boolean isDistributed)</pre> |
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| <h4>open</h4> |
| <pre>public void open(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<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="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>> conf, |
| <a href="../../../../../org/apache/storm/task/TopologyContext.html" title="class in org.apache.storm.task">TopologyContext</a> context, |
| <a href="../../../../../org/apache/storm/spout/SpoutOutputCollector.html" title="class in org.apache.storm.spout">SpoutOutputCollector</a> collector)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/spout/ISpout.html#open-java.util.Map-org.apache.storm.task.TopologyContext-org.apache.storm.spout.SpoutOutputCollector-">ISpout</a></code></span></div> |
| <div class="block"><p>Called when a task for this component is initialized within a worker on the cluster. It provides the spout with the environment in which the spout executes.</p><p><p>This includes the:</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/spout/ISpout.html#open-java.util.Map-org.apache.storm.task.TopologyContext-org.apache.storm.spout.SpoutOutputCollector-">open</a></code> in interface <code><a href="../../../../../org/apache/storm/spout/ISpout.html" title="interface in org.apache.storm.spout">ISpout</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>conf</code> - The Storm configuration for this spout. This is the configuration provided to the topology merged in with cluster configuration on this machine.</dd> |
| <dd><code>context</code> - This object can be used to get information about this task’s place within the topology, including the task id and component id of this task, input and output information, etc.</dd> |
| <dd><code>collector</code> - The collector is used to emit tuples from this spout. Tuples can be emitted at any time, including the open and close methods. The collector is thread-safe and should be saved as an instance variable of this spout object.</dd> |
| </dl> |
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| <h4>close</h4> |
| <pre>public void close()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/spout/ISpout.html#close--">ISpout</a></code></span></div> |
| <div class="block"><p>Called when an ISpout is going to be shutdown. There is no guarentee that close will be called, because the supervisor kill -9’s worker processes on the cluster.</p><p><p>The one context where close is guaranteed to be called is a topology is killed when running Storm in local mode.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/spout/ISpout.html#close--">close</a></code> in interface <code><a href="../../../../../org/apache/storm/spout/ISpout.html" title="interface in org.apache.storm.spout">ISpout</a></code></dd> |
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| <pre>public void nextTuple()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/spout/ISpout.html#nextTuple--">ISpout</a></code></span></div> |
| <div class="block"><p>When this method is called, Storm is requesting that the Spout emit tuples to the output collector. This method should be non-blocking, so if the Spout has no tuples to emit, this method should return. nextTuple, ack, and fail are all called in a tight loop in a single thread in the spout task. When there are no tuples to emit, it is courteous to have nextTuple sleep for a short amount of time (like a single millisecond) so as not to waste too much CPU.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/spout/ISpout.html#nextTuple--">nextTuple</a></code> in interface <code><a href="../../../../../org/apache/storm/spout/ISpout.html" title="interface in org.apache.storm.spout">ISpout</a></code></dd> |
| </dl> |
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| <h4>ack</h4> |
| <pre>public void ack(<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> msgId)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/spout/ISpout.html#ack-java.lang.Object-">ISpout</a></code></span></div> |
| <div class="block"><p>Storm has determined that the tuple emitted by this spout with the msgId identifier has been fully processed. Typically, an implementation of this method will take that message off the queue and prevent it from being replayed.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/spout/ISpout.html#ack-java.lang.Object-">ack</a></code> in interface <code><a href="../../../../../org/apache/storm/spout/ISpout.html" title="interface in org.apache.storm.spout">ISpout</a></code></dd> |
| </dl> |
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| <a name="fail-java.lang.Object-"> |
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| <h4>fail</h4> |
| <pre>public void fail(<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> msgId)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/spout/ISpout.html#fail-java.lang.Object-">ISpout</a></code></span></div> |
| <div class="block"><p>The tuple emitted by this spout with the msgId identifier has failed to be fully processed. Typically, an implementation of this method will put that message back on the queue to be replayed at a later time.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/spout/ISpout.html#fail-java.lang.Object-">fail</a></code> in interface <code><a href="../../../../../org/apache/storm/spout/ISpout.html" title="interface in org.apache.storm.spout">ISpout</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="declareOutputFields-org.apache.storm.topology.OutputFieldsDeclarer-"> |
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| <h4>declareOutputFields</h4> |
| <pre>public void declareOutputFields(<a href="../../../../../org/apache/storm/topology/OutputFieldsDeclarer.html" title="interface in org.apache.storm.topology">OutputFieldsDeclarer</a> declarer)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/topology/IComponent.html#declareOutputFields-org.apache.storm.topology.OutputFieldsDeclarer-">IComponent</a></code></span></div> |
| <div class="block"><p>Declare the output schema for all the streams of this topology.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/topology/IComponent.html#declareOutputFields-org.apache.storm.topology.OutputFieldsDeclarer-">declareOutputFields</a></code> in interface <code><a href="../../../../../org/apache/storm/topology/IComponent.html" title="interface in org.apache.storm.topology">IComponent</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>declarer</code> - this is used to declare output stream ids, output fields, and whether or not each output stream is a direct stream</dd> |
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| <h4>activate</h4> |
| <pre>public void activate()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/spout/ISpout.html#activate--">ISpout</a></code></span></div> |
| <div class="block"><p>Called when a spout has been activated out of a deactivated mode. nextTuple will be called on this spout soon. A spout can become activated after having been deactivated when the topology is manipulated using the <code>storm</code> client.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/spout/ISpout.html#activate--">activate</a></code> in interface <code><a href="../../../../../org/apache/storm/spout/ISpout.html" title="interface in org.apache.storm.spout">ISpout</a></code></dd> |
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| <h4>deactivate</h4> |
| <pre>public void deactivate()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/spout/ISpout.html#deactivate--">ISpout</a></code></span></div> |
| <div class="block"><p>Called when a spout has been deactivated. nextTuple will not be called while a spout is deactivated. The spout may or may not be reactivated in the future.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/spout/ISpout.html#deactivate--">deactivate</a></code> in interface <code><a href="../../../../../org/apache/storm/spout/ISpout.html" title="interface in org.apache.storm.spout">ISpout</a></code></dd> |
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| <a name="getComponentConfiguration--"> |
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| <h4>getComponentConfiguration</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<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="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>> getComponentConfiguration()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/storm/topology/IComponent.html#getComponentConfiguration--">IComponent</a></code></span></div> |
| <div class="block"><p>Declare configuration specific to this component. Only a subset of the “topology.*” configs can be overridden. The component configuration can be further overridden when constructing the topology using <a href="../../../../../org/apache/storm/topology/TopologyBuilder.html" title="class in org.apache.storm.topology"><code>TopologyBuilder</code></a></p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/storm/topology/IComponent.html#getComponentConfiguration--">getComponentConfiguration</a></code> in interface <code><a href="../../../../../org/apache/storm/topology/IComponent.html" title="interface in org.apache.storm.topology">IComponent</a></code></dd> |
| </dl> |
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