1.9/apidocs/org/apache/accumulo/core/client/rfile/RFileWriter.html - accumulo-website - Git at Google

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 <div class="subTitle">org.apache.accumulo.core.client.rfile</div>
 <h2 title="Class RFileWriter" class="title">Class RFileWriter</h2>
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 <li>org.apache.accumulo.core.client.rfile.RFileWriter</li>
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 <pre>public class <span class="typeNameLabel">RFileWriter</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">This class provides an API for writing RFiles. It can be used to create file for bulk import into
  Accumulo using <a href="../../../../../../org/apache/accumulo/core/client/admin/TableOperations.html#importDirectory-java.lang.String-java.lang.String-java.lang.String-boolean-"><code>TableOperations.importDirectory(String, String, String, boolean)</code></a>

  <p>
  A RFileWriter has the following constraints. Violating these constraints will result in runtime
  exceptions.

  <ul>
  <li>Keys must be appended in sorted order within a locality group.</li>
  <li>Locality groups must have a mutually exclusive set of column families.</li>
  <li>The default locality group must be started last.</li>
  </ul>

  <p>
  Below is an example of using RFileWriter

  <pre>
  <code>
      Iterable&lt;Entry&lt;Key, Value&gt;&gt; localityGroup1Data = ...
      Iterable&lt;Entry&lt;Key, Value&gt;&gt; localityGroup2Data = ...
      Iterable&lt;Entry&lt;Key, Value&gt;&gt; defaultGroupData = ...

      try(RFileWriter writer = RFile.newWriter().to(file).build()) {

        // Start a locality group before appending data.
        writer.startNewLocalityGroup("groupA", "columnFam1", "columnFam2");
        // Append data to the locality group that was started above. Must append in sorted order.
        writer.append(localityGroup1Data);

        // Add another locality group.
        writer.startNewLocalityGroup("groupB", "columnFam3", "columnFam4");
        writer.append(localityGroup2Data);

        // The default locality group must be started last.
        // The column families for the default group do not need to be specified.
        writer.startDefaultLocalityGroup();
        // Data appended here can not contain any
        // column families specified in previous locality groups.
        writer.append(defaultGroupData);

        // This is a try-with-resources so the writer is closed here at the end of the code block.
      }
  </code>
  </pre>

  <p>
  Create instances by calling <a href="../../../../../../org/apache/accumulo/core/client/rfile/RFile.html#newWriter--"><code>RFile.newWriter()</code></a></div>
 <dl>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>1.8.0</dd>
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 <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/accumulo/core/client/rfile/RFileWriter.html#append-java.lang.Iterable-">append</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a>&lt;<a href="../../../../../../org/apache/accumulo/core/data/Key.html" title="class in org.apache.accumulo.core.data">Key</a>,<a href="../../../../../../org/apache/accumulo/core/data/Value.html" title="class in org.apache.accumulo.core.data">Value</a>&gt;&gt;&nbsp;keyValues)</code>
 <div class="block">Append the keys and values to the last locality group that was started.</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/accumulo/core/client/rfile/RFileWriter.html#append-org.apache.accumulo.core.data.Key-org.apache.accumulo.core.data.Value-">append</a></span>(<a href="../../../../../../org/apache/accumulo/core/data/Key.html" title="class in org.apache.accumulo.core.data">Key</a>&nbsp;key,
       <a href="../../../../../../org/apache/accumulo/core/data/Value.html" title="class in org.apache.accumulo.core.data">Value</a>&nbsp;val)</code>
 <div class="block">Append the key and value to the last locality group that was started.</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/accumulo/core/client/rfile/RFileWriter.html#close--">close</a></span>()</code>&nbsp;</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/accumulo/core/client/rfile/RFileWriter.html#startDefaultLocalityGroup--">startDefaultLocalityGroup</a></span>()</code>
 <div class="block">A locality group in which the column families do not need to specified.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-byte:A...-">startNewLocalityGroup</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>&nbsp;name,
                      byte[]...&nbsp;families)</code>
 <div class="block">See javadoc for <a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.List-"><code>startNewLocalityGroup(String, List)</code></a></div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.List-">startNewLocalityGroup</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>&nbsp;name,
                      <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;byte[]&gt;&nbsp;families)</code>
 <div class="block">Before appending any data, a locality group must be started.</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/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.Set-">startNewLocalityGroup</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>&nbsp;name,
                      <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<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>&gt;&nbsp;families)</code>
 <div class="block">See javadoc for <a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.List-"><code>startNewLocalityGroup(String, List)</code></a>.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.lang.String...-">startNewLocalityGroup</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>&nbsp;name,
                      <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>...&nbsp;families)</code>
 <div class="block">See javadoc for <a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.List-"><code>startNewLocalityGroup(String, List)</code></a>.</div>
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 <h4>startNewLocalityGroup</h4>
 <pre>public&nbsp;void&nbsp;startNewLocalityGroup(<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>&nbsp;name,
                                   <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;byte[]&gt;&nbsp;families)
                            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">Before appending any data, a locality group must be started. The default locality group must be
  started last.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>name</code> - locality group name, used for informational purposes</dd>
 <dd><code>families</code> - the column families the locality group can contain</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - When default locality group already started.</dd>
 <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>
 </li>
 </ul>
 <a name="startNewLocalityGroup-java.lang.String-byte:A...-">
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 <h4>startNewLocalityGroup</h4>
 <pre>public&nbsp;void&nbsp;startNewLocalityGroup(<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>&nbsp;name,
                                   byte[]...&nbsp;families)
                            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">See javadoc for <a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.List-"><code>startNewLocalityGroup(String, List)</code></a></div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - When default locality group already started.</dd>
 <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>startNewLocalityGroup</h4>
 <pre>public&nbsp;void&nbsp;startNewLocalityGroup(<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>&nbsp;name,
                                   <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&lt;<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>&gt;&nbsp;families)
                            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">See javadoc for <a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.List-"><code>startNewLocalityGroup(String, List)</code></a>.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>families</code> - will be encoded using UTF-8</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - When default locality group already started.</dd>
 <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>startNewLocalityGroup</h4>
 <pre>public&nbsp;void&nbsp;startNewLocalityGroup(<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>&nbsp;name,
                                   <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>...&nbsp;families)
                            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">See javadoc for <a href="../../../../../../org/apache/accumulo/core/client/rfile/RFileWriter.html#startNewLocalityGroup-java.lang.String-java.util.List-"><code>startNewLocalityGroup(String, List)</code></a>.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>families</code> - will be encoded using UTF-8</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - When default locality group already started.</dd>
 <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>startDefaultLocalityGroup</h4>
 <pre>public&nbsp;void&nbsp;startDefaultLocalityGroup()
                                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 locality group in which the column families do not need to specified. The locality group must
  be started after all other locality groups. Can not append column families that were in a
  previous locality group. If no locality groups were started, then the first append will start
  the default locality group.</div>
 <dl>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IllegalStateException.html?is-external=true" title="class or interface in java.lang">IllegalStateException</a></code> - When default locality group already started.</dd>
 <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>
 </li>
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 <h4>append</h4>
 <pre>public&nbsp;void&nbsp;append(<a href="../../../../../../org/apache/accumulo/core/data/Key.html" title="class in org.apache.accumulo.core.data">Key</a>&nbsp;key,
                    <a href="../../../../../../org/apache/accumulo/core/data/Value.html" title="class in org.apache.accumulo.core.data">Value</a>&nbsp;val)
             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">Append the key and value to the last locality group that was started. If no locality group was
  started, then the default group will automatically be started.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - This key must be greater than or equal to the last key appended. For non-default
           locality groups, the keys column family must be one of the column families specified
           when calling startNewLocalityGroup(). Must be non-null.</dd>
 <dd><code>val</code> - value to append, must be non-null.</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> - This is thrown when data is appended out of order OR when the key contains a invalid
            visibility OR when a column family is not valid for a locality group.</dd>
 <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>
 </li>
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 <h4>append</h4>
 <pre>public&nbsp;void&nbsp;append(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a>&lt;<a href="../../../../../../org/apache/accumulo/core/data/Key.html" title="class in org.apache.accumulo.core.data">Key</a>,<a href="../../../../../../org/apache/accumulo/core/data/Value.html" title="class in org.apache.accumulo.core.data">Value</a>&gt;&gt;&nbsp;keyValues)
             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">Append the keys and values to the last locality group that was started.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keyValues</code> - The keys must be in sorted order. The first key returned by the iterable must be
           greater than or equal to the last key appended. For non-default locality groups, the
           keys column family must be one of the column families specified when calling
           startNewLocalityGroup(). Must be non-null. If no locality group was started, then the
           default group will automatically be started.</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> - This is thrown when data is appended out of order OR when the key contains a invalid
            visibility OR when a column family is not valid for a locality group.</dd>
 <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>close</h4>
 <pre>public&nbsp;void&nbsp;close()
            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>
 <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>
 <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>
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