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| <h2 title="Enum SessionConfiguration.FlushMode" class="title">Enum SessionConfiguration.FlushMode</h2> |
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| <li>org.apache.kudu.client.SessionConfiguration.FlushMode</li> |
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| <pre>@InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| public static enum <span class="typeNameLabel">SessionConfiguration.FlushMode</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Enum.html?is-external=true" title="class or interface in java.lang">Enum</a><<a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html" title="enum in org.apache.kudu.client">SessionConfiguration.FlushMode</a>></pre> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html#AUTO_FLUSH_BACKGROUND">AUTO_FLUSH_BACKGROUND</a></span></code> |
| <div class="block"><a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> calls will return immediately, but the writes |
| will be sent in the background, potentially batched together with other writes from |
| the same session.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html#AUTO_FLUSH_SYNC">AUTO_FLUSH_SYNC</a></span></code> |
| <div class="block">Each <a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> call will return only after being |
| flushed to the server automatically.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html#MANUAL_FLUSH">MANUAL_FLUSH</a></span></code> |
| <div class="block"><a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> calls will return immediately, but the writes |
| will not be sent until the user calls <a href="../../../../org/apache/kudu/client/KuduSession.html#flush--"><code>KuduSession.flush()</code></a>.</div> |
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| <td class="colFirst"><code>static <a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html" title="enum in org.apache.kudu.client">SessionConfiguration.FlushMode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html#valueOf-java.lang.String-">valueOf</a></span>(<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> name)</code> |
| <div class="block">Returns the enum constant of this type with the specified name.</div> |
| </td> |
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| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html" title="enum in org.apache.kudu.client">SessionConfiguration.FlushMode</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html#values--">values</a></span>()</code> |
| <div class="block">Returns an array containing the constants of this enum type, in |
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| <h4>AUTO_FLUSH_SYNC</h4> |
| <pre>public static final <a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html" title="enum in org.apache.kudu.client">SessionConfiguration.FlushMode</a> AUTO_FLUSH_SYNC</pre> |
| <div class="block">Each <a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> call will return only after being |
| flushed to the server automatically. No batching will occur. |
| |
| <p>In this mode, the <a href="../../../../org/apache/kudu/client/KuduSession.html#flush--"><code>KuduSession.flush()</code></a> call never has any effect, since each |
| <a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> has already flushed the buffer before |
| returning. |
| |
| <p><strong>This is the default flush mode.</strong></div> |
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| <h4>AUTO_FLUSH_BACKGROUND</h4> |
| <pre>public static final <a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html" title="enum in org.apache.kudu.client">SessionConfiguration.FlushMode</a> AUTO_FLUSH_BACKGROUND</pre> |
| <div class="block"><a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> calls will return immediately, but the writes |
| will be sent in the background, potentially batched together with other writes from |
| the same session. If there is not sufficient buffer space, then |
| <a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> may block for buffer space to be available. |
| |
| <p>Because writes are applied in the background, any errors will be stored |
| in a session-local buffer. Call <a href="../../../../org/apache/kudu/client/SessionConfiguration.html#countPendingErrors--"><code>countPendingErrors()</code></a> or |
| <a href="../../../../org/apache/kudu/client/SessionConfiguration.html#getPendingErrors--"><code>getPendingErrors()</code></a> to retrieve them. |
| |
| <p><strong>Note:</strong> The <code>AUTO_FLUSH_BACKGROUND</code> mode may result in |
| out-of-order writes to Kudu. This is because in this mode multiple write |
| operations may be sent to the server in parallel. |
| See <a href="https://issues.apache.org/jira/browse/KUDU-1767">KUDU-1767</a> for more |
| information. |
| |
| <p>The <a href="../../../../org/apache/kudu/client/KuduSession.html#flush--"><code>KuduSession.flush()</code></a> call can be used to block until the buffer is empty.</div> |
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| <h4>MANUAL_FLUSH</h4> |
| <pre>public static final <a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html" title="enum in org.apache.kudu.client">SessionConfiguration.FlushMode</a> MANUAL_FLUSH</pre> |
| <div class="block"><a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> calls will return immediately, but the writes |
| will not be sent until the user calls <a href="../../../../org/apache/kudu/client/KuduSession.html#flush--"><code>KuduSession.flush()</code></a>. If the buffer runs past |
| the configured space limit, then <a href="../../../../org/apache/kudu/client/KuduSession.html#apply-org.apache.kudu.client.Operation-"><code>KuduSession.apply()</code></a> will return |
| an error.</div> |
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| <h4>values</h4> |
| <pre>public static <a href="../../../../org/apache/kudu/client/SessionConfiguration.FlushMode.html" title="enum in org.apache.kudu.client">SessionConfiguration.FlushMode</a>[] values()</pre> |
| <div class="block">Returns an array containing the constants of this enum type, in |
| the order they are declared. This method may be used to iterate |
| over the constants as follows: |
| <pre> |
| for (SessionConfiguration.FlushMode c : SessionConfiguration.FlushMode.values()) |
| System.out.println(c); |
| </pre></div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>an array containing the constants of this enum type, in the order they are declared</dd> |
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| <div class="block">Returns the enum constant of this type with the specified name. |
| The string must match <i>exactly</i> an identifier used to declare an |
| enum constant in this type. (Extraneous whitespace characters are |
| not permitted.)</div> |
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| <dd><code>name</code> - the name of the enum constant to be returned.</dd> |
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| <dd>the enum constant with the specified name</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if this enum type has no constant with the specified name</dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the argument is null</dd> |
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