cassandra-server

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html lang="en"> <head>  <title>Descriptor (apache-cassandra API)</title> <meta name="date" content="2014-09-07"> <link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style"> </head> <body> <script type="text/javascript"> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript>  <div class="topNav"><a name="navbar_top">  </a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">  </a> <ul class="navList" title="Navigation"> <li><a href="../../../../../overview-summary.html">Overview</a></li> <li><a href="package-summary.html">Package</a></li> <li class="navBarCell1Rev">Class</li> <li><a href="class-use/Descriptor.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../../../../deprecated-list.html">Deprecated</a></li> <li><a href="../../../../../index-all.html">Index</a></li> <li><a href="../../../../../help-doc.html">Help</a></li> </ul> </div> <div class="subNav"> <ul class="navList"> <li><a href="../../../../../org/apache/cassandra/io/sstable/CQLSSTableWriter.Builder.html" title="class in org.apache.cassandra.io.sstable"><span class="strong">Prev Class</span></a></li> <li><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable"><span class="strong">Next Class</span></a></li> </ul> <ul class="navList"> <li><a href="../../../../../index.html?org/apache/cassandra/io/sstable/Descriptor.html" target="_top">Frames</a></li> <li><a href="Descriptor.html" target="_top">No Frames</a></li> </ul> <ul class="navList" id="allclasses_navbar_top"> <li><a href="../../../../../allclasses-noframe.html">All Classes</a></li> </ul> <div> <script type="text/javascript"> </script> </div> <div> <ul class="subNavList"> <li>Summary: </li> <li><a href="#nested_class_summary">Nested</a> | </li> <li><a href="#field_summary">Field</a> | </li> <li><a href="#constructor_summary">Constr</a> | </li> <li><a href="#method_summary">Method</a></li> </ul> <ul class="subNavList"> <li>Detail: </li> <li><a href="#field_detail">Field</a> | </li> <li><a href="#constructor_detail">Constr</a> | </li> <li><a href="#method_detail">Method</a></li> </ul> </div> <a name="skip-navbar_top">  </a></div>   <div class="header"> <div class="subTitle">org.apache.cassandra.io.sstable</div> <h2 title="Class Descriptor" class="title">Class Descriptor</h2> </div> <div class="contentContainer"> <ul class="inheritance"> <li>java.lang.Object</li> <li> <ul class="inheritance"> <li>org.apache.cassandra.io.sstable.Descriptor</li> </ul> </li> </ul> <div class="description"> <ul class="blockList"> <li class="blockList"> <hr> <br> <pre>public class <span class="strong">Descriptor</span> extends java.lang.Object</pre> <div class="block">A SSTable is described by the keyspace and column family it contains data for, a generation (where higher generations contain more recent data) and an alphabetic version string. A descriptor can be marked as temporary, which influences generated filenames.</div> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="nested_class_summary">  </a> <h3>Nested Class Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Nested Class Summary table, listing nested classes, and an explanation"> <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Class and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>static class </code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static class </code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Version.html" title="class in org.apache.cassandra.io.sstable">Descriptor.Version</a></strong></code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="field_summary">  </a> <h3>Field Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> <caption><span>Fields</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Field and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#cfname">cfname</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>java.io.File</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#directory">directory</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>int</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#generation">generation</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#ksname">ksname</a></strong></code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#type">type</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Version.html" title="class in org.apache.cassandra.io.sstable">Descriptor.Version</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#version">version</a></strong></code> <div class="block">version has the following format: <code>[a-z]+</code></div> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="constructor_summary">  </a> <h3>Constructor Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> <caption><span>Constructors</span><span class="tabEnd"> </span></caption> <tr> <th class="colOne" scope="col">Constructor and Description</th> </tr> <tr class="altColor"> <td class="colOne"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#Descriptor(org.apache.cassandra.io.sstable.Descriptor.Version,%20java.io.File,%20java.lang.String,%20java.lang.String,%20int,%20org.apache.cassandra.io.sstable.Descriptor.Type)">Descriptor</a></strong>(<a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Version.html" title="class in org.apache.cassandra.io.sstable">Descriptor.Version</a> version, java.io.File directory, java.lang.String ksname, java.lang.String cfname, int generation, <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a> temp)</code> </td> </tr> <tr class="rowColor"> <td class="colOne"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#Descriptor(java.io.File,%20java.lang.String,%20java.lang.String,%20int,%20org.apache.cassandra.io.sstable.Descriptor.Type)">Descriptor</a></strong>(java.io.File directory, java.lang.String ksname, java.lang.String cfname, int generation, <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a> temp)</code> <div class="block">A descriptor that assumes CURRENT_VERSION.</div> </td> </tr> <tr class="altColor"> <td class="colOne"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#Descriptor(java.lang.String,%20java.io.File,%20java.lang.String,%20java.lang.String,%20int,%20org.apache.cassandra.io.sstable.Descriptor.Type)">Descriptor</a></strong>(java.lang.String version, java.io.File directory, java.lang.String ksname, java.lang.String cfname, int generation, <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a> temp)</code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_summary">  </a> <h3>Method 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class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#baseFilename()">baseFilename</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>boolean</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#equals(java.lang.Object)">equals</a></strong>(java.lang.Object o)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#filenameFor(org.apache.cassandra.io.sstable.Component)">filenameFor</a></strong>(<a href="../../../../../org/apache/cassandra/io/sstable/Component.html" title="class in org.apache.cassandra.io.sstable">Component</a> component)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#filenameFor(java.lang.String)">filenameFor</a></strong>(java.lang.String suffix)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../../org/apache/cassandra/utils/Pair.html" title="class in org.apache.cassandra.utils">Pair</a><<a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a>,java.lang.String></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#fromFilename(java.io.File,%20java.lang.String)">fromFilename</a></strong>(java.io.File directory, java.lang.String name)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <a href="../../../../../org/apache/cassandra/utils/Pair.html" title="class in org.apache.cassandra.utils">Pair</a><<a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a>,java.lang.String></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#fromFilename(java.io.File,%20java.lang.String,%20boolean)">fromFilename</a></strong>(java.io.File directory, java.lang.String name, boolean skipComponent)</code> <div class="block">Filename of the form "<ksname>-<cfname>-[tmp-][<version>-]<gen>-<component>"</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#fromFilename(java.lang.String)">fromFilename</a></strong>(java.lang.String filename)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#fromFilename(java.lang.String,%20boolean)">fromFilename</a></strong>(java.lang.String filename, boolean skipComponent)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../org/apache/cassandra/io/sstable/metadata/IMetadataSerializer.html" title="interface in org.apache.cassandra.io.sstable.metadata">IMetadataSerializer</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#getMetadataSerializer()">getMetadataSerializer</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>int</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#hashCode()">hashCode</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>boolean</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#isCompatible()">isCompatible</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#relativeFilenameFor(org.apache.cassandra.io.sstable.Component)">relativeFilenameFor</a></strong>(<a href="../../../../../org/apache/cassandra/io/sstable/Component.html" title="class in org.apache.cassandra.io.sstable">Component</a> component)</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>java.lang.String</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#toString()">toString</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#withGeneration(int)">withGeneration</a></strong>(int newGeneration)</code> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_java.lang.Object">  </a> <h3>Methods inherited from class java.lang.Object</h3> <code>clone, finalize, getClass, notify, notifyAll, wait, wait, wait</code></li> </ul> </li> </ul> </li> </ul> </div> <div class="details"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="field_detail">  </a> <h3>Field Detail</h3> <a name="directory">  </a> <ul class="blockList"> <li class="blockList"> <h4>directory</h4> <pre>public final java.io.File directory</pre> </li> </ul> <a name="version">  </a> <ul class="blockList"> <li class="blockList"> <h4>version</h4> <pre>public final <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Version.html" title="class in org.apache.cassandra.io.sstable">Descriptor.Version</a> version</pre> <div class="block">version has the following format: <code>[a-z]+</code></div> </li> </ul> <a name="ksname">  </a> <ul class="blockList"> <li class="blockList"> <h4>ksname</h4> <pre>public final java.lang.String ksname</pre> </li> </ul> <a name="cfname">  </a> <ul class="blockList"> <li class="blockList"> <h4>cfname</h4> <pre>public final java.lang.String cfname</pre> </li> </ul> <a name="generation">  </a> <ul class="blockList"> <li class="blockList"> <h4>generation</h4> <pre>public final int generation</pre> </li> </ul> <a name="type">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>type</h4> <pre>public final <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a> type</pre> </li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="constructor_detail">  </a> <h3>Constructor Detail</h3> <a name="Descriptor(java.io.File, java.lang.String, java.lang.String, int, org.apache.cassandra.io.sstable.Descriptor.Type)">  </a> <ul class="blockList"> <li class="blockList"> <h4>Descriptor</h4> <pre>public Descriptor(java.io.File directory, java.lang.String ksname, java.lang.String cfname, int generation, <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a> temp)</pre> <div class="block">A descriptor that assumes CURRENT_VERSION.</div> </li> </ul> <a name="Descriptor(java.lang.String, java.io.File, java.lang.String, java.lang.String, int, 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class="blockList"> <h4>baseFilename</h4> <pre>public java.lang.String baseFilename()</pre> </li> </ul> <a name="relativeFilenameFor(org.apache.cassandra.io.sstable.Component)">  </a> <ul class="blockList"> <li class="blockList"> <h4>relativeFilenameFor</h4> <pre>public java.lang.String relativeFilenameFor(<a href="../../../../../org/apache/cassandra/io/sstable/Component.html" title="class in org.apache.cassandra.io.sstable">Component</a> component)</pre> </li> </ul> <a name="filenameFor(java.lang.String)">  </a> <ul class="blockList"> <li class="blockList"> <h4>filenameFor</h4> <pre>public java.lang.String filenameFor(java.lang.String suffix)</pre> <dl><dt><span class="strong">Parameters:</span></dt><dd><code>suffix</code> - A component suffix, such as 'Data.db'/'Index.db'/etc</dd> <dt><span class="strong">Returns:</span></dt><dd>A filename for this descriptor with the given suffix.</dd></dl> </li> </ul> <a name="fromFilename(java.lang.String)">  </a> <ul class="blockList"> <li class="blockList"> <h4>fromFilename</h4> <pre>public static <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a> fromFilename(java.lang.String filename)</pre> <dl><dt><span class="strong">Parameters:</span></dt><dd><code>filename</code> - The SSTable filename</dd> <dt><span class="strong">Returns:</span></dt><dd>Descriptor of the SSTable initialized from filename</dd><dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html#fromFilename(java.io.File,%20java.lang.String)"><code>fromFilename(File directory, String name)</code></a></dd></dl> </li> </ul> <a name="fromFilename(java.lang.String, boolean)">  </a> <ul class="blockList"> <li class="blockList"> <h4>fromFilename</h4> <pre>public static <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a> fromFilename(java.lang.String filename, boolean skipComponent)</pre> </li> </ul> <a name="fromFilename(java.io.File, java.lang.String)">  </a> <ul class="blockList"> <li class="blockList"> <h4>fromFilename</h4> <pre>public static <a href="../../../../../org/apache/cassandra/utils/Pair.html" title="class in org.apache.cassandra.utils">Pair</a><<a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a>,java.lang.String> fromFilename(java.io.File directory, java.lang.String name)</pre> </li> </ul> <a name="fromFilename(java.io.File, java.lang.String, boolean)">  </a> <ul class="blockList"> <li class="blockList"> <h4>fromFilename</h4> <pre>public static <a href="../../../../../org/apache/cassandra/utils/Pair.html" title="class in org.apache.cassandra.utils">Pair</a><<a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a>,java.lang.String> fromFilename(java.io.File directory, java.lang.String name, boolean skipComponent)</pre> <div class="block">Filename of the form "<ksname>-<cfname>-[tmp-][<version>-]<gen>-<component>"</div> <dl><dt><span class="strong">Parameters:</span></dt><dd><code>directory</code> - The directory of the SSTable files</dd><dd><code>name</code> - The name of the SSTable file</dd><dd><code>skipComponent</code> - true if the name param should not be parsed for a component tag</dd> <dt><span class="strong">Returns:</span></dt><dd>A Descriptor for the SSTable, and the Component remainder.</dd></dl> </li> </ul> <a name="asType(org.apache.cassandra.io.sstable.Descriptor.Type)">  </a> <ul class="blockList"> <li class="blockList"> <h4>asType</h4> <pre>public <a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.html" title="class in org.apache.cassandra.io.sstable">Descriptor</a> asType(<a href="../../../../../org/apache/cassandra/io/sstable/Descriptor.Type.html" title="enum in org.apache.cassandra.io.sstable">Descriptor.Type</a> type)</pre> <dl><dt><span class="strong">Parameters:</span></dt><dd><code>type</code> - temporary flag</dd> <dt><span class="strong">Returns:</span></dt><dd>A clone of this descriptor with the given 'temporary' status.</dd></dl> </li> </ul> <a name="getMetadataSerializer()">  </a> <ul class="blockList"> <li class="blockList"> <h4>getMetadataSerializer</h4> <pre>public <a href="../../../../../org/apache/cassandra/io/sstable/metadata/IMetadataSerializer.html" title="interface in org.apache.cassandra.io.sstable.metadata">IMetadataSerializer</a> getMetadataSerializer()</pre> </li> </ul> <a name="isCompatible()">  </a> <ul class="blockList"> <li class="blockList"> <h4>isCompatible</h4> <pre>public boolean isCompatible()</pre> <dl><dt><span class="strong">Returns:</span></dt><dd>true if the current Cassandra version can read the given sstable 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