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| <h2 title="Class EmptyCheckpointMark" class="title">Class EmptyCheckpointMark</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <ul class="inheritance"> |
| <li>org.apache.beam.runners.spark.io.EmptyCheckpointMark</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd>java.io.Serializable, <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html" title="interface in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark</a></dd> |
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| <pre>public class <span class="typeNameLabel">EmptyCheckpointMark</span> |
| extends java.lang.Object |
| implements <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html" title="interface in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark</a>, java.io.Serializable</pre> |
| <div class="block">Passing null values to Spark's Java API may cause problems because of Guava preconditions. See: |
| <code>JavaUtils.optionToOptional(scala.Option<T>)</code></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../../serialized-form.html#org.apache.beam.runners.spark.io.EmptyCheckpointMark">Serialized Form</a></dd> |
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| <h3>Nested classes/interfaces inherited from interface org.apache.beam.sdk.io.<a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html" title="interface in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark</a></h3> |
| <code><a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.NoopCheckpointMark.html" title="class in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark.NoopCheckpointMark</a></code></li> |
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| <h3>Fields inherited from interface org.apache.beam.sdk.io.<a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html" title="interface in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark</a></h3> |
| <code><a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html#NOOP_CHECKPOINT_MARK">NOOP_CHECKPOINT_MARK</a></code></li> |
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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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/runners/spark/io/EmptyCheckpointMark.html#equals-java.lang.Object-">equals</a></span>(<a href="https://static.javadoc.io/org.checkerframework/checker-qual/3.10.0/org/checkerframework/checker/nullness/qual/Nullable.html?is-external=true" title="class or interface in org.checkerframework.checker.nullness.qual">@Nullable</a> java.lang.Object obj)</code> </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/beam/runners/spark/io/EmptyCheckpointMark.html#finalizeCheckpoint--">finalizeCheckpoint</a></span>()</code> |
| <div class="block">Called by the system to signal that this checkpoint mark has been committed along with all |
| the records which have been read from the <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource.UnboundedReader</code></a> since the previous |
| checkpoint was taken.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../org/apache/beam/runners/spark/io/EmptyCheckpointMark.html" title="class in org.apache.beam.runners.spark.io">EmptyCheckpointMark</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/runners/spark/io/EmptyCheckpointMark.html#get--">get</a></span>()</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/runners/spark/io/EmptyCheckpointMark.html#hashCode--">hashCode</a></span>()</code> </td> |
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| <!-- --> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait</code></li> |
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| <h4>get</h4> |
| <pre>public static <a href="../../../../../../org/apache/beam/runners/spark/io/EmptyCheckpointMark.html" title="class in org.apache.beam.runners.spark.io">EmptyCheckpointMark</a> get()</pre> |
| </li> |
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| <a name="finalizeCheckpoint--"> |
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| </a> |
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| <h4>finalizeCheckpoint</h4> |
| <pre>public void finalizeCheckpoint() |
| throws java.io.IOException</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html#finalizeCheckpoint--">UnboundedSource.CheckpointMark</a></code></span></div> |
| <div class="block">Called by the system to signal that this checkpoint mark has been committed along with all |
| the records which have been read from the <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource.UnboundedReader</code></a> since the previous |
| checkpoint was taken. |
| |
| <p>For example, this method could send acknowledgements to an external data source such as |
| Pubsub. |
| |
| <p>Note that: |
| |
| <ul> |
| <li>This finalize method may be called from any thread, concurrently with calls to the |
| <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource.UnboundedReader</code></a> it was created from. |
| <li>Checkpoints will not necessarily be finalized as soon as they are created. A checkpoint |
| may be taken while a previous checkpoint from the same <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource.UnboundedReader</code></a> has not |
| yet be finalized. |
| <li>In the absence of failures, all checkpoints will be finalized and they will be |
| finalized in the same order they were taken from the <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource.UnboundedReader</code></a>. |
| <li>It is possible for a checkpoint to be taken but this method never called. This method |
| will never be called if the checkpoint could not be committed, and other failures may |
| cause this method to never be called. |
| <li>It is not safe to assume the <a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.UnboundedReader.html" title="class in org.apache.beam.sdk.io"><code>UnboundedSource.UnboundedReader</code></a> from which this checkpoint was |
| created still exists at the time this method is called. |
| </ul></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html#finalizeCheckpoint--">finalizeCheckpoint</a></code> in interface <code><a href="../../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html" title="interface in org.apache.beam.sdk.io">UnboundedSource.CheckpointMark</a></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code>java.io.IOException</code></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>equals</h4> |
| <pre>public boolean equals(<a href="https://static.javadoc.io/org.checkerframework/checker-qual/3.10.0/org/checkerframework/checker/nullness/qual/Nullable.html?is-external=true" title="class or interface in org.checkerframework.checker.nullness.qual">@Nullable</a> java.lang.Object obj)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code>equals</code> in class <code>java.lang.Object</code></dd> |
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| <pre>public int hashCode()</pre> |
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| <dd><code>hashCode</code> in class <code>java.lang.Object</code></dd> |
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