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| <div class="subTitle">org.apache.gearpump.streaming.state.api</div> |
| <h2 title="Class PersistentTask" class="title">Class PersistentTask<T></h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">org.apache.gearpump.streaming.task.Task</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.gearpump.streaming.state.api.PersistentTask<T></li> |
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| <dt>All Implemented Interfaces:</dt> |
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| <pre>public abstract class <span class="typeNameLabel">PersistentTask<T></span> |
| extends <a href="../../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a></pre> |
| <div class="block">PersistentTask is part of the transaction API |
| <p> |
| Users should extend this task if they want to get transaction support |
| from the framework</div> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#PersistentTask-org.apache.gearpump.streaming.task.TaskContext-org.apache.gearpump.cluster.UserConfig-">PersistentTask</a></span>(<a href="../../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a> taskContext, |
| <a href="../../../../../../org/apache/gearpump/cluster/UserConfig.html" title="class in org.apache.gearpump.cluster">UserConfig</a> conf)</code> </td> |
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| <h3>Method Summary</h3> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract 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="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../org/apache/gearpump/Message.html" title="class in org.apache.gearpump">Message</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#CHECKPOINT--">CHECKPOINT</a></span>()</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#checkpointInterval--">checkpointInterval</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/gearpump/streaming/state/impl/CheckpointManager.html" title="class in org.apache.gearpump.streaming.state.impl">CheckpointManager</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#checkpointManager--">checkpointManager</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStore.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStore</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#checkpointStore--">checkpointStore</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStoreFactory.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStoreFactory</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#checkpointStoreFactory--">checkpointStoreFactory</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#LOG--">LOG</a></span>()</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#onNext-org.apache.gearpump.Message-">onNext</a></span>(<a href="../../../../../../org/apache/gearpump/Message.html" title="class in org.apache.gearpump">Message</a> message)</code> |
| <div class="block">Method called for each message received.</div> |
| </td> |
| </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/state/api/PersistentTask.html#onStart-org.apache.gearpump.streaming.task.StartTime-">onStart</a></span>(<a href="../../../../../../org/apache/gearpump/streaming/task/StartTime.html" title="class in org.apache.gearpump.streaming.task">StartTime</a> startTime)</code> |
| <div class="block">Method called with the task is initialized.</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/state/api/PersistentTask.html#onStop--">onStop</a></span>()</code> |
| <div class="block">Method called when task is under clean up.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>abstract <a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentState.html" title="interface in org.apache.gearpump.streaming.state.api">PersistentState</a><<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html" title="type parameter in PersistentTask">T</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#persistentState--">persistentState</a></span>()</code> |
| <div class="block">Subclass should override this method to pass in a PersistentState.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>abstract void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#processMessage-org.apache.gearpump.streaming.state.api.PersistentState-org.apache.gearpump.Message-">processMessage</a></span>(<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentState.html" title="interface in org.apache.gearpump.streaming.state.api">PersistentState</a><<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html" title="type parameter in PersistentTask">T</a>> state, |
| <a href="../../../../../../org/apache/gearpump/Message.html" title="class in org.apache.gearpump">Message</a> message)</code> |
| <div class="block">Subclass should override this method to specify how a new message should update state</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentState.html" title="interface in org.apache.gearpump.streaming.state.api">PersistentState</a><<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html" title="type parameter in PersistentTask">T</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html#state--">state</a></span>()</code> |
| <div class="block">Persistent state that will be stored (by checkpointing) automatically to storage like HDFS</div> |
| </td> |
| </tr> |
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| <h3>Methods inherited from class org.apache.gearpump.streaming.task.<a href="../../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a></h3> |
| <code><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#LOG--">LOG</a>, <a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#receiveUnManagedMessage--">receiveUnManagedMessage</a>, <a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#self--">self</a>, <a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#sender--">sender</a>, <a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#system--">system</a></code></li> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
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| <h3>Constructor Detail</h3> |
| <a name="PersistentTask-org.apache.gearpump.streaming.task.TaskContext-org.apache.gearpump.cluster.UserConfig-"> |
| <!-- --> |
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| <h4>PersistentTask</h4> |
| <pre>public PersistentTask(<a href="../../../../../../org/apache/gearpump/streaming/task/TaskContext.html" title="interface in org.apache.gearpump.streaming.task">TaskContext</a> taskContext, |
| <a href="../../../../../../org/apache/gearpump/cluster/UserConfig.html" title="class in org.apache.gearpump.cluster">UserConfig</a> conf)</pre> |
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| <h3>Method Detail</h3> |
| <a name="CHECKPOINT--"> |
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| <h4>CHECKPOINT</h4> |
| <pre>public static <a href="../../../../../../org/apache/gearpump/Message.html" title="class in org.apache.gearpump">Message</a> CHECKPOINT()</pre> |
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| <h4>LOG</h4> |
| <pre>public static org.slf4j.Logger LOG()</pre> |
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| <h4>checkpointStoreFactory</h4> |
| <pre>public <a href="../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStoreFactory.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStoreFactory</a> checkpointStoreFactory()</pre> |
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| <h4>checkpointStore</h4> |
| <pre>public <a href="../../../../../../org/apache/gearpump/streaming/transaction/api/CheckpointStore.html" title="interface in org.apache.gearpump.streaming.transaction.api">CheckpointStore</a> checkpointStore()</pre> |
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| <h4>checkpointInterval</h4> |
| <pre>public long checkpointInterval()</pre> |
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| <h4>checkpointManager</h4> |
| <pre>public <a href="../../../../../../org/apache/gearpump/streaming/state/impl/CheckpointManager.html" title="class in org.apache.gearpump.streaming.state.impl">CheckpointManager</a> checkpointManager()</pre> |
| </li> |
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| <a name="persistentState--"> |
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| <h4>persistentState</h4> |
| <pre>public abstract <a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentState.html" title="interface in org.apache.gearpump.streaming.state.api">PersistentState</a><<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html" title="type parameter in PersistentTask">T</a>> persistentState()</pre> |
| <div class="block">Subclass should override this method to pass in a PersistentState. the framework has already |
| offered two states: |
| - NonWindowState: state with no time or other boundary |
| - WindowState: each state is bounded by a time window</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>(undocumented)</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="processMessage-org.apache.gearpump.streaming.state.api.PersistentState-org.apache.gearpump.Message-"> |
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| </a> |
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| <h4>processMessage</h4> |
| <pre>public abstract void processMessage(<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentState.html" title="interface in org.apache.gearpump.streaming.state.api">PersistentState</a><<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html" title="type parameter in PersistentTask">T</a>> state, |
| <a href="../../../../../../org/apache/gearpump/Message.html" title="class in org.apache.gearpump">Message</a> message)</pre> |
| <div class="block">Subclass should override this method to specify how a new message should update state</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>state</code> - (undocumented)</dd> |
| <dd><code>message</code> - (undocumented)</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="state--"> |
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| </a> |
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| <h4>state</h4> |
| <pre>public <a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentState.html" title="interface in org.apache.gearpump.streaming.state.api">PersistentState</a><<a href="../../../../../../org/apache/gearpump/streaming/state/api/PersistentTask.html" title="type parameter in PersistentTask">T</a>> state()</pre> |
| <div class="block">Persistent state that will be stored (by checkpointing) automatically to storage like HDFS</div> |
| </li> |
| </ul> |
| <a name="onStart-org.apache.gearpump.streaming.task.StartTime-"> |
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| </a> |
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| <h4>onStart</h4> |
| <pre>public final void onStart(<a href="../../../../../../org/apache/gearpump/streaming/task/StartTime.html" title="class in org.apache.gearpump.streaming.task">StartTime</a> startTime)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onStart-org.apache.gearpump.streaming.task.StartTime-">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> |
| <dd><code><a href="../../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onStart-org.apache.gearpump.streaming.task.StartTime-">onStart</a></code> in interface <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="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#onStart-org.apache.gearpump.streaming.task.StartTime-">onStart</a></code> in class <code><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a></code></dd> |
| <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> |
| </dl> |
| </li> |
| </ul> |
| <a name="onNext-org.apache.gearpump.Message-"> |
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| </a> |
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| <h4>onNext</h4> |
| <pre>public final void onNext(<a href="../../../../../../org/apache/gearpump/Message.html" title="class in org.apache.gearpump">Message</a> message)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <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. |
| <p></div> |
| <dl> |
| <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> in interface <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="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#onNext-org.apache.gearpump.Message-">onNext</a></code> in class <code><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>message</code> - Message send by upstream tasks</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="onStop--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>onStop</h4> |
| <pre>public final void onStop()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onStop--">TaskInterface</a></code></span></div> |
| <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> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/gearpump/streaming/task/TaskInterface.html#onStop--">onStop</a></code> in interface <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="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html#onStop--">onStop</a></code> in class <code><a href="../../../../../../org/apache/gearpump/streaming/task/Task.html" title="class in org.apache.gearpump.streaming.task">Task</a></code></dd> |
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