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| <h2 title="Class CheckPointState" class="title">Class CheckPointState</h2> |
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| <pre>public class <span class="typeNameLabel">CheckPointState</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></pre> |
| <div class="block"><p>Captures the current state of the transaction in <a href="../../../../org/apache/storm/spout/CheckpointSpout.html" title="class in org.apache.storm.spout"><code>CheckpointSpout</code></a>. The state transitions are as follows. <pre> ROLLBACK(tx2) <————- PREPARE(tx2) COMMIT(tx2) COMMITTED(tx1)————-> PREPARING(tx2) ————–> COMMITTING(tx2) —————–> COMMITTED (tx2)</p><p></pre></p><p><p>During recovery, if a previous transaction is in PREPARING state, it is rolled back since all bolts in the topology might not have prepared (saved) the data for commit. If the previous transaction is in COMMITTING state, it is rolled forward (committed) since some bolts might have already committed the data.</p><p><p>During normal flow, the state transitions from PREPARING to COMMITTING to COMMITTED. In case of failures the prepare/commit operation is retried.</p></div> |
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| <td class="colFirst"><code>static class </code></td> |
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| <td class="colFirst"><code>static class </code></td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#CheckPointState--">CheckPointState</a></span>()</code> </td> |
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| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#CheckPointState-long-org.apache.storm.spout.CheckPointState.State-">CheckPointState</a></span>(long txid, |
| <a href="../../../../org/apache/storm/spout/CheckPointState.State.html" title="enum in org.apache.storm.spout">CheckPointState.State</a> state)</code> </td> |
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| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#equals-java.lang.Object-">equals</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> o)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/storm/spout/CheckPointState.State.html" title="enum in org.apache.storm.spout">CheckPointState.State</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#getState--">getState</a></span>()</code> </td> |
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| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#getTxid--">getTxid</a></span>()</code> </td> |
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| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#hashCode--">hashCode</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/storm/spout/CheckPointState.Action.html" title="enum in org.apache.storm.spout">CheckPointState.Action</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#nextAction-boolean-">nextAction</a></span>(boolean recovering)</code> |
| <div class="block">Get the next action to perform based on this checkpoint state.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/storm/spout/CheckPointState.html" title="class in org.apache.storm.spout">CheckPointState</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/storm/spout/CheckPointState.html#nextState-boolean-">nextState</a></span>(boolean recovering)</code> |
| <div class="block">Get the next state based on this checkpoint state.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><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/spout/CheckPointState.html#toString--">toString</a></span>()</code> </td> |
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| <h4>CheckPointState</h4> |
| <pre>public CheckPointState(long txid, |
| <a href="../../../../org/apache/storm/spout/CheckPointState.State.html" title="enum in org.apache.storm.spout">CheckPointState.State</a> state)</pre> |
| </li> |
| </ul> |
| <a name="CheckPointState--"> |
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| <h4>CheckPointState</h4> |
| <pre>public CheckPointState()</pre> |
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| <pre>public long getTxid()</pre> |
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| <h4>getState</h4> |
| <pre>public <a href="../../../../org/apache/storm/spout/CheckPointState.State.html" title="enum in org.apache.storm.spout">CheckPointState.State</a> getState()</pre> |
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| <pre>public <a href="../../../../org/apache/storm/spout/CheckPointState.html" title="class in org.apache.storm.spout">CheckPointState</a> nextState(boolean recovering)</pre> |
| <div class="block"><p>Get the next state based on this checkpoint state.</p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>recovering</code> - if in recovering phase</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the next checkpoint state based on this state.</dd> |
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| <pre>public <a href="../../../../org/apache/storm/spout/CheckPointState.Action.html" title="enum in org.apache.storm.spout">CheckPointState.Action</a> nextAction(boolean recovering)</pre> |
| <div class="block"><p>Get the next action to perform based on this checkpoint state.</p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>recovering</code> - if in recovering phase</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the next action to perform based on this state</dd> |
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| <dl> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
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