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| <div class="subTitle">org.apache.iceberg.flink.source.assigner</div> |
| <h2 title="Class DefaultSplitAssigner" class="title">Class DefaultSplitAssigner</h2> |
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| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.iceberg.flink.source.assigner.DefaultSplitAssigner</li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd>java.io.Closeable, java.lang.AutoCloseable, <a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></dd> |
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| <hr> |
| <br> |
| <pre>@Internal |
| public class <span class="typeNameLabel">DefaultSplitAssigner</span> |
| extends java.lang.Object |
| implements <a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></pre> |
| <div class="block">Since all methods are called in the source coordinator thread by enumerator, there is no need for |
| locking.</div> |
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| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/iceberg/flink/source/assigner/DefaultSplitAssigner.html#DefaultSplitAssigner-org.apache.iceberg.flink.source.split.SerializableComparator-">DefaultSplitAssigner</a></span>(<a href="../../../../../../org/apache/iceberg/flink/source/split/SerializableComparator.html" title="interface in org.apache.iceberg.flink.source.split">SerializableComparator</a><<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> comparator)</code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/iceberg/flink/source/assigner/DefaultSplitAssigner.html#DefaultSplitAssigner-org.apache.iceberg.flink.source.split.SerializableComparator-java.util.Collection-">DefaultSplitAssigner</a></span>(<a href="../../../../../../org/apache/iceberg/flink/source/split/SerializableComparator.html" title="interface in org.apache.iceberg.flink.source.split">SerializableComparator</a><<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> comparator, |
| java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplitState.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplitState</a>> assignerState)</code> </td> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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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> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/GetSplitResult.html" title="class in org.apache.iceberg.flink.source.assigner">GetSplitResult</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/iceberg/flink/source/assigner/DefaultSplitAssigner.html#getNext-java.lang.String-">getNext</a></span>(java.lang.String hostname)</code> |
| <div class="block">Request a new split from the assigner when enumerator trying to assign splits to awaiting |
| readers.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>java.util.concurrent.CompletableFuture<java.lang.Void></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/iceberg/flink/source/assigner/DefaultSplitAssigner.html#isAvailable--">isAvailable</a></span>()</code> |
| <div class="block">Enumerator can get a notification via CompletableFuture when the assigner has more splits |
| available later.</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/iceberg/flink/source/assigner/DefaultSplitAssigner.html#onDiscoveredSplits-java.util.Collection-">onDiscoveredSplits</a></span>(java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> splits)</code> |
| <div class="block">Add new splits discovered by enumerator</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/iceberg/flink/source/assigner/DefaultSplitAssigner.html#onUnassignedSplits-java.util.Collection-">onUnassignedSplits</a></span>(java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> splits)</code> |
| <div class="block">Forward addSplitsBack event (for failed reader) to assigner</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/iceberg/flink/source/assigner/DefaultSplitAssigner.html#pendingRecords--">pendingRecords</a></span>()</code> |
| <div class="block">Return the number of pending records, which can act as a measure of the source lag.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/iceberg/flink/source/assigner/DefaultSplitAssigner.html#pendingSplitCount--">pendingSplitCount</a></span>()</code> |
| <div class="block">Return the number of pending splits that haven't been assigned yet.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplitState.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplitState</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/iceberg/flink/source/assigner/DefaultSplitAssigner.html#state--">state</a></span>()</code> |
| <div class="block">Simple assigner only tracks unassigned splits</div> |
| </td> |
| </tr> |
| </table> |
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| <li class="blockList"><a name="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> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.apache.iceberg.flink.source.assigner.SplitAssigner"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from interface org.apache.iceberg.flink.source.assigner.<a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></h3> |
| <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#close--">close</a>, <a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#onCompletedSplits-java.util.Collection-">onCompletedSplits</a>, <a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#start--">start</a></code></li> |
| </ul> |
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| </ul> |
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| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="DefaultSplitAssigner-org.apache.iceberg.flink.source.split.SerializableComparator-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>DefaultSplitAssigner</h4> |
| <pre>public DefaultSplitAssigner(<a href="../../../../../../org/apache/iceberg/flink/source/split/SerializableComparator.html" title="interface in org.apache.iceberg.flink.source.split">SerializableComparator</a><<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> comparator)</pre> |
| </li> |
| </ul> |
| <a name="DefaultSplitAssigner-org.apache.iceberg.flink.source.split.SerializableComparator-java.util.Collection-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
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| <h4>DefaultSplitAssigner</h4> |
| <pre>public DefaultSplitAssigner(<a href="../../../../../../org/apache/iceberg/flink/source/split/SerializableComparator.html" title="interface in org.apache.iceberg.flink.source.split">SerializableComparator</a><<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> comparator, |
| java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplitState.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplitState</a>> assignerState)</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="getNext-java.lang.String-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getNext</h4> |
| <pre>public <a href="../../../../../../org/apache/iceberg/flink/source/assigner/GetSplitResult.html" title="class in org.apache.iceberg.flink.source.assigner">GetSplitResult</a> getNext(@Nullable |
| java.lang.String hostname)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#getNext-java.lang.String-">SplitAssigner</a></code></span></div> |
| <div class="block">Request a new split from the assigner when enumerator trying to assign splits to awaiting |
| readers. |
| |
| <p>If enumerator wasn't able to assign the split (e.g., reader disconnected), enumerator should |
| call <a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#onUnassignedSplits-java.util.Collection-"><code>SplitAssigner.onUnassignedSplits(java.util.Collection<org.apache.iceberg.flink.source.split.IcebergSourceSplit>)</code></a> to return the split.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#getNext-java.lang.String-">getNext</a></code> in interface <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="onDiscoveredSplits-java.util.Collection-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>onDiscoveredSplits</h4> |
| <pre>public void onDiscoveredSplits(java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> splits)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#onDiscoveredSplits-java.util.Collection-">SplitAssigner</a></code></span></div> |
| <div class="block">Add new splits discovered by enumerator</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#onDiscoveredSplits-java.util.Collection-">onDiscoveredSplits</a></code> in interface <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="onUnassignedSplits-java.util.Collection-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>onUnassignedSplits</h4> |
| <pre>public void onUnassignedSplits(java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplit.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplit</a>> splits)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#onUnassignedSplits-java.util.Collection-">SplitAssigner</a></code></span></div> |
| <div class="block">Forward addSplitsBack event (for failed reader) to assigner</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#onUnassignedSplits-java.util.Collection-">onUnassignedSplits</a></code> in interface <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="state--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>state</h4> |
| <pre>public java.util.Collection<<a href="../../../../../../org/apache/iceberg/flink/source/split/IcebergSourceSplitState.html" title="class in org.apache.iceberg.flink.source.split">IcebergSourceSplitState</a>> state()</pre> |
| <div class="block">Simple assigner only tracks unassigned splits</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#state--">state</a></code> in interface <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></code></dd> |
| </dl> |
| </li> |
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| <a name="isAvailable--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isAvailable</h4> |
| <pre>public java.util.concurrent.CompletableFuture<java.lang.Void> isAvailable()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#isAvailable--">SplitAssigner</a></code></span></div> |
| <div class="block">Enumerator can get a notification via CompletableFuture when the assigner has more splits |
| available later. Enumerator should schedule assignment in the thenAccept action of the future. |
| |
| <p>Assigner will return the same future if this method is called again before the previous |
| future is completed. |
| |
| <p>The future can be completed from other thread, e.g. the coordinator thread from another |
| thread for event time alignment. |
| |
| <p>If enumerator need to trigger action upon the future completion, it may want to run it in |
| the coordinator thread using <code>SplitEnumeratorContext.runInCoordinatorThread(Runnable)</code>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#isAvailable--">isAvailable</a></code> in interface <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="pendingSplitCount--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>pendingSplitCount</h4> |
| <pre>public int pendingSplitCount()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#pendingSplitCount--">SplitAssigner</a></code></span></div> |
| <div class="block">Return the number of pending splits that haven't been assigned yet. |
| |
| <p>The enumerator can poll this API to publish a metric on the number of pending splits. |
| |
| <p>The enumerator can also use this information to throttle split discovery for streaming read. |
| If there are already many pending splits tracked by the assigner, it is undesirable to discover |
| more splits and track them in the assigner. That will increase the memory footprint and |
| enumerator checkpoint size. |
| |
| <p>Throttling works better together with <a href="../../../../../../org/apache/iceberg/flink/source/ScanContext.html#maxPlanningSnapshotCount--"><code>ScanContext.maxPlanningSnapshotCount()</code></a>. |
| Otherwise, the next split discovery after throttling will just discover all non-enumerated |
| snapshots and splits, which defeats the purpose of throttling.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#pendingSplitCount--">pendingSplitCount</a></code> in interface <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="pendingRecords--"> |
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| </a> |
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| <h4>pendingRecords</h4> |
| <pre>public long pendingRecords()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#pendingRecords--">SplitAssigner</a></code></span></div> |
| <div class="block">Return the number of pending records, which can act as a measure of the source lag. This value |
| could be an estimation if the exact number of records cannot be accurately computed.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html#pendingRecords--">pendingRecords</a></code> in interface <code><a href="../../../../../../org/apache/iceberg/flink/source/assigner/SplitAssigner.html" title="interface in org.apache.iceberg.flink.source.assigner">SplitAssigner</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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