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 <div class="subTitle">org.apache.kudu.client</div>
 <h2 title="Class KuduTransaction" class="title">Class KuduTransaction</h2>
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 <li>
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 <li>org.apache.kudu.client.KuduTransaction</li>
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 <pre>@InterfaceAudience.Public
  @InterfaceStability.Unstable
 public class <span class="typeNameLabel">KuduTransaction</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>
 implements <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></pre>
 <div class="block">A handle for a multi-row transaction in Kudu.
  <p>
  Once created using <a href="../../../../org/apache/kudu/client/KuduClient.html#newTransaction--"><code>KuduClient.newTransaction()</code></a> or
  <a href="../../../../org/apache/kudu/client/KuduTransaction.html#deserialize-byte:A-org.apache.kudu.client.AsyncKuduClient-"><code>deserialize(byte[], org.apache.kudu.client.AsyncKuduClient)</code></a> methods, an instance of this class
  can be used to commit or rollback the underlying multi-row transaction. To
  issue write operations as a part of the transaction, use the
  <a href="../../../../org/apache/kudu/client/KuduTransaction.html#newKuduSession--"><code>newKuduSession()</code></a> or
  <a href="../../../../org/apache/kudu/client/KuduTransaction.html#newAsyncKuduSession--"><code>newAsyncKuduSession()</code></a> methods to create a new
  transactional session and apply write operations using it.
  <p>
  The <a href="../../../../org/apache/kudu/client/KuduTransaction.html" title="class in org.apache.kudu.client"><code>KuduTransaction</code></a> implements <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang"><code>AutoCloseable</code></a> and should be
  used with try-with-resource code construct. Once an object of this class
  is constructed, it starts sending automatic keep-alive heartbeat messages
  to keep the underlying transaction open. Once the object goes out of scope
  and <a href="../../../../org/apache/kudu/client/KuduTransaction.html#close--"><code>close()</code></a> is automatically called by the Java
  runtime (or the method is called explicitly), the heartbeating stops and the
  transaction is automatically aborted by the system after not receiving
  heartbeat messages for a few keep-alive intervals.</div>
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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">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</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>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#close--">close</a></span>()</code>
 <div class="block">Stop keepalive heartbeating, if any was in progress for this transaction
  handle.</div>
 </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/kudu/client/KuduTransaction.html#commit--">commit</a></span>()</code>
 <div class="block">Commit the multi-row distributed transaction represented by this handle.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>static <a href="../../../../org/apache/kudu/client/KuduTransaction.html" title="class in org.apache.kudu.client">KuduTransaction</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#deserialize-byte:A-org.apache.kudu.client.AsyncKuduClient-">deserialize</a></span>(byte[]&nbsp;buf,
            <a href="../../../../org/apache/kudu/client/AsyncKuduClient.html" title="class in org.apache.kudu.client">AsyncKuduClient</a>&nbsp;client)</code>
 <div class="block">Re-create KuduTransaction object given its serialized representation.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#isCommitComplete--">isCommitComplete</a></span>()</code>
 <div class="block">Check whether the commit phase for a transaction is complete.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code><a href="../../../../org/apache/kudu/client/AsyncKuduSession.html" title="class in org.apache.kudu.client">AsyncKuduSession</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#newAsyncKuduSession--">newAsyncKuduSession</a></span>()</code>
 <div class="block">Create a new <a href="../../../../org/apache/kudu/client/AsyncKuduSession.html" title="class in org.apache.kudu.client"><code>AsyncKuduSession</code></a> based on this transaction.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code><a href="../../../../org/apache/kudu/client/KuduSession.html" title="class in org.apache.kudu.client">KuduSession</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#newKuduSession--">newKuduSession</a></span>()</code>
 <div class="block">Create a new <a href="../../../../org/apache/kudu/client/KuduSession.html" title="class in org.apache.kudu.client"><code>KuduSession</code></a> based on this transaction.</div>
 </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/kudu/client/KuduTransaction.html#rollback--">rollback</a></span>()</code>
 <div class="block">Rollback the multi-row distributed transaction represented by this object.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>byte[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#serialize--">serialize</a></span>()</code>
 <div class="block">A shortcut for the <a href="../../../../org/apache/kudu/client/KuduTransaction.html#serialize-org.apache.kudu.client.KuduTransaction.SerializationOptions-"><code>serialize(SerializationOptions)</code></a>
  method invoked with default-constructed <code>KuduTransaction.SerializationOptions</code>.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>byte[]</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#serialize-org.apache.kudu.client.KuduTransaction.SerializationOptions-">serialize</a></span>(org.apache.kudu.client.KuduTransaction.SerializationOptions&nbsp;options)</code>
 <div class="block">Export information on the underlying transaction in a serialized form.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/KuduTransaction.html#startCommit--">startCommit</a></span>()</code>
 <div class="block">Start committing the multi-row distributed transaction represented by
  this handle.</div>
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 <h4>newAsyncKuduSession</h4>
 <pre>public&nbsp;<a href="../../../../org/apache/kudu/client/AsyncKuduSession.html" title="class in org.apache.kudu.client">AsyncKuduSession</a>&nbsp;newAsyncKuduSession()</pre>
 <div class="block">Create a new <a href="../../../../org/apache/kudu/client/AsyncKuduSession.html" title="class in org.apache.kudu.client"><code>AsyncKuduSession</code></a> based on this transaction.
  <p>
  All write operations using the result session will be performed in the
  context of this transaction.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a new <a href="../../../../org/apache/kudu/client/AsyncKuduSession.html" title="class in org.apache.kudu.client"><code>AsyncKuduSession</code></a> instance</dd>
 </dl>
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 <h4>newKuduSession</h4>
 <pre>public&nbsp;<a href="../../../../org/apache/kudu/client/KuduSession.html" title="class in org.apache.kudu.client">KuduSession</a>&nbsp;newKuduSession()</pre>
 <div class="block">Create a new <a href="../../../../org/apache/kudu/client/KuduSession.html" title="class in org.apache.kudu.client"><code>KuduSession</code></a> based on this transaction.
  <p>
  All write operations using the result session will be performed in the
  context of this transaction.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a new <a href="../../../../org/apache/kudu/client/KuduSession.html" title="class in org.apache.kudu.client"><code>KuduSession</code></a> instance</dd>
 </dl>
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 <h4>commit</h4>
 <pre>public&nbsp;void&nbsp;commit()
             throws <a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></pre>
 <div class="block">Commit the multi-row distributed transaction represented by this handle.
  <p>
  This method starts committing the transaction and awaits for the commit
  phase to finalize.</div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></code> - if something went wrong</dd>
 </dl>
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 <pre>public&nbsp;void&nbsp;startCommit()
                  throws <a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></pre>
 <div class="block">Start committing the multi-row distributed transaction represented by
  this handle.
  <p>
  This method only starts committing the transaction, not awaiting for the
  commit phase to finalize. Use <a href="../../../../org/apache/kudu/client/KuduTransaction.html#isCommitComplete--"><code>isCommitComplete()</code></a>
  to check whether the transaction is committed.</div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></code> - if something went wrong upon starting to commit</dd>
 </dl>
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 <h4>isCommitComplete</h4>
 <pre>public&nbsp;boolean&nbsp;isCommitComplete()
                          throws <a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></pre>
 <div class="block">Check whether the commit phase for a transaction is complete.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd><code>true</code> if transaction has finalized, otherwise <code>false</code></dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code>NonRecoverableException</code> - with Status.Aborted()
    if transaction has been or is being aborted</dd>
 <dd><code>NonRecoverableException</code> - with Status.IllegalState()
    if transaction is still open (i.e. commit() hasn't been called yet)</dd>
 <dd><code>NonRecoverableException</code> - with Status.NotSupported()
    if transaction is in unexpected state (non-compatible backend?)</dd>
 <dd><code><a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></code> - if an error happens while querying the system about
                        the state of the transaction</dd>
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 <h4>rollback</h4>
 <pre>public&nbsp;void&nbsp;rollback()
               throws <a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></pre>
 <div class="block">Rollback the multi-row distributed transaction represented by this object.
  <p>
  This method initiates rolling back the transaction and returns right after
  that. The system takes care of the rest. Once the control returns and
  no exception is thrown, a client have a guarantee that all write
  operations issued in the context of this transaction cannot be seen seen
  outside.</div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../../org/apache/kudu/client/KuduException.html" title="class in org.apache.kudu.client">KuduException</a></code> - if something went wrong</dd>
 </dl>
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 <h4>serialize</h4>
 <pre>public&nbsp;byte[]&nbsp;serialize(org.apache.kudu.client.KuduTransaction.SerializationOptions&nbsp;options)
                  throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
 <div class="block">Export information on the underlying transaction in a serialized form.
  <p>
  This method transforms this handle into its serialized representation.
  <p>
  The serialized information on a Kudu transaction can be passed among
  different Kudu clients running at multiple nodes, so those separate
  Kudu clients can perform operations to be a part of the same distributed
  transaction. The resulting string is referred as "transaction token" and
  it can be deserialized into a transaction handle (i.e. an object of this
  class) via the <a href="../../../../org/apache/kudu/client/KuduTransaction.html#deserialize-byte:A-org.apache.kudu.client.AsyncKuduClient-"><code>deserialize(byte[], org.apache.kudu.client.AsyncKuduClient)</code></a> method.
  <p>
  This method doesn't perform any RPC under the hood.
  <p>
  The representation of the data in the serialized form (i.e. the format of
  a Kudu transaction token) is an implementation detail, not a part of the
  public API and can be changed without notice.</div>
 <dl>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the serialized form of this transaction handle</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if serialization fails</dd>
 </dl>
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 <h4>serialize</h4>
 <pre>public&nbsp;byte[]&nbsp;serialize()
                  throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
 <div class="block">A shortcut for the <a href="../../../../org/apache/kudu/client/KuduTransaction.html#serialize-org.apache.kudu.client.KuduTransaction.SerializationOptions-"><code>serialize(SerializationOptions)</code></a>
  method invoked with default-constructed <code>KuduTransaction.SerializationOptions</code>.</div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
 </dl>
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 <h4>deserialize</h4>
 <pre>public static&nbsp;<a href="../../../../org/apache/kudu/client/KuduTransaction.html" title="class in org.apache.kudu.client">KuduTransaction</a>&nbsp;deserialize(byte[]&nbsp;buf,
                                           <a href="../../../../org/apache/kudu/client/AsyncKuduClient.html" title="class in org.apache.kudu.client">AsyncKuduClient</a>&nbsp;client)
                                    throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
 <div class="block">Re-create KuduTransaction object given its serialized representation.
  <p>
  This method doesn't perform any RPC under the hood. The newly created
  object automatically does or does not send keep-alive messages depending
  on the <code>KuduTransaction.SerializationOptions.isKeepaliveEnabled()</code> setting when
  the original <a href="../../../../org/apache/kudu/client/KuduTransaction.html" title="class in org.apache.kudu.client"><code>KuduTransaction</code></a> object was serialized using
  <a href="../../../../org/apache/kudu/client/KuduTransaction.html#serialize-org.apache.kudu.client.KuduTransaction.SerializationOptions-"><code>serialize(org.apache.kudu.client.KuduTransaction.SerializationOptions)</code></a> method.
  <p></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>client</code> - Client instance to bound the result object to</dd>
 <dd><code>buf</code> - serialized representation of a <a href="../../../../org/apache/kudu/client/KuduTransaction.html" title="class in org.apache.kudu.client"><code>KuduTransaction</code></a> object</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Operation result status.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - if deserialization fails</dd>
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 <h4>close</h4>
 <pre>public&nbsp;void&nbsp;close()</pre>
 <div class="block">Stop keepalive heartbeating, if any was in progress for this transaction
  handle.
  <p>
  This method is called automatically when the object goes out of scope
  as prescribed for <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang"><code>AutoCloseable</code></a>.
  <p>
  This method doesn't throw according to the recommendations for
  <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang"><code>AutoCloseable.close()</code></a>. In case of an error, this method just logs
  the corresponding error message.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true#close--" title="class or interface in java.lang">close</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/AutoCloseable.html?is-external=true" title="class or interface in java.lang">AutoCloseable</a></code></dd>
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