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| <dt>All Implemented Interfaces:</dt> |
| <dd><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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| public static class <span class="typeNameLabel">CountingSource.CounterMark</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></pre> |
| <div class="block">The checkpoint for an unbounded <a href="../../../../../org/apache/beam/sdk/io/CountingSource.html" title="class in org.apache.beam.sdk.io"><code>CountingSource</code></a> is simply the last value produced. The |
| associated source object encapsulates the information needed to produce the next value.</div> |
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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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| <code><a href="../../../../../org/apache/beam/sdk/io/UnboundedSource.CheckpointMark.html#NOOP_CHECKPOINT_MARK">NOOP_CHECKPOINT_MARK</a></code></li> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/io/CountingSource.CounterMark.html#CounterMark-long-org.joda.time.Instant-">CounterMark</a></span>(long lastEmitted, |
| <a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a> startTime)</code> |
| <div class="block">Creates a checkpoint mark reflecting the last emitted value.</div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/io/CountingSource.CounterMark.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="i1" class="rowColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/io/CountingSource.CounterMark.html#getLastEmitted--">getLastEmitted</a></span>()</code> |
| <div class="block">Returns the last value emitted by the reader.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/io/CountingSource.CounterMark.html#getStartTime--">getStartTime</a></span>()</code> |
| <div class="block">Returns the time the reader was started.</div> |
| </td> |
| </tr> |
| </table> |
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| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
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| <ul class="blockListLast"> |
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| <h4>CounterMark</h4> |
| <pre>public CounterMark(long lastEmitted, |
| <a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a> startTime)</pre> |
| <div class="block">Creates a checkpoint mark reflecting the last emitted value.</div> |
| </li> |
| </ul> |
| </li> |
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| <h4>getLastEmitted</h4> |
| <pre>public long getLastEmitted()</pre> |
| <div class="block">Returns the last value emitted by the reader.</div> |
| </li> |
| </ul> |
| <a name="getStartTime--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getStartTime</h4> |
| <pre>public <a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a> getStartTime()</pre> |
| <div class="block">Returns the time the reader was started.</div> |
| </li> |
| </ul> |
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| </a> |
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| <li class="blockList"> |
| <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> |
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