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>LazilyCompactedRow (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/LazilyCompactedRow.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/db/compaction/ICompactionScanner.html" title="interface in org.apache.cassandra.db.compaction"><span class="strong">Prev Class</span></a></li> <li><a href="../../../../../org/apache/cassandra/db/compaction/LeveledCompactionStrategy.html" title="class in org.apache.cassandra.db.compaction"><span class="strong">Next Class</span></a></li> </ul> <ul class="navList"> <li><a href="../../../../../index.html?org/apache/cassandra/db/compaction/LazilyCompactedRow.html" target="_top">Frames</a></li> <li><a href="LazilyCompactedRow.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>Nested | </li> <li><a href="#fields_inherited_from_class_org.apache.cassandra.db.compaction.AbstractCompactedRow">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>Field | </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.db.compaction</div> <h2 title="Class LazilyCompactedRow" class="title">Class LazilyCompactedRow</h2> </div> <div class="contentContainer"> <ul class="inheritance"> <li>java.lang.Object</li> <li> <ul class="inheritance"> <li><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html" title="class in org.apache.cassandra.db.compaction">org.apache.cassandra.db.compaction.AbstractCompactedRow</a></li> <li> <ul class="inheritance"> <li>org.apache.cassandra.db.compaction.LazilyCompactedRow</li> </ul> </li> </ul> </li> </ul> <div class="description"> <ul class="blockList"> <li class="blockList"> <dl> <dt>All Implemented Interfaces:</dt> <dd>java.io.Closeable, java.lang.AutoCloseable</dd> </dl> <hr> <br> <pre>public class <span class="strong">LazilyCompactedRow</span> extends <a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html" title="class in org.apache.cassandra.db.compaction">AbstractCompactedRow</a></pre> <div class="block">LazilyCompactedRow only computes the row bloom filter and column index in memory (at construction time); it does this by reading one column at a time from each of the rows being compacted, and merging them as it does so. So the most we have in memory at a time is the bloom filter, the index, and one column from each pre-compaction row.</div> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="field_summary">  </a> <h3>Field Summary</h3> <ul class="blockList"> <li class="blockList"><a name="fields_inherited_from_class_org.apache.cassandra.db.compaction.AbstractCompactedRow">  </a> <h3>Fields inherited from class org.apache.cassandra.db.compaction.<a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html" title="class in org.apache.cassandra.db.compaction">AbstractCompactedRow</a></h3> <code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html#key">key</a></code></li> </ul> </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/db/compaction/LazilyCompactedRow.html#LazilyCompactedRow(org.apache.cassandra.db.compaction.CompactionController,%20java.util.List)">LazilyCompactedRow</a></strong>(<a href="../../../../../org/apache/cassandra/db/compaction/CompactionController.html" title="class in org.apache.cassandra.db.compaction">CompactionController</a> controller, java.util.List<? extends <a href="../../../../../org/apache/cassandra/db/columniterator/OnDiskAtomIterator.html" title="interface in org.apache.cassandra.db.columniterator">OnDiskAtomIterator</a>> rows)</code> </td> </tr> </table> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_summary">  </a> <h3>Method Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> <caption><span>Methods</span><span class="tabEnd"> </span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Method and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/db/compaction/LazilyCompactedRow.html#close()">close</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../org/apache/cassandra/io/sstable/ColumnStats.html" title="class in org.apache.cassandra.io.sstable">ColumnStats</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/db/compaction/LazilyCompactedRow.html#columnStats()">columnStats</a></strong>()</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/db/compaction/LazilyCompactedRow.html#update(java.security.MessageDigest)">update</a></strong>(java.security.MessageDigest digest)</code> <div class="block">update @param digest with the data bytes of the row (not including row key or row size).</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../../org/apache/cassandra/db/RowIndexEntry.html" title="class in org.apache.cassandra.db">RowIndexEntry</a></code></td> <td class="colLast"><code><strong><a href="../../../../../org/apache/cassandra/db/compaction/LazilyCompactedRow.html#write(long,%20org.apache.cassandra.io.util.DataOutputPlus)">write</a></strong>(long currentPosition, <a href="../../../../../org/apache/cassandra/io/util/DataOutputPlus.html" title="interface in org.apache.cassandra.io.util">DataOutputPlus</a> out)</code> <div class="block">write the row (size + column index + filter + column data, but NOT row key) to @param out.</div> </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, equals, finalize, getClass, hashCode, notify, notifyAll, toString, 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="constructor_detail">  </a> <h3>Constructor Detail</h3> <a name="LazilyCompactedRow(org.apache.cassandra.db.compaction.CompactionController, java.util.List)">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>LazilyCompactedRow</h4> <pre>public LazilyCompactedRow(<a href="../../../../../org/apache/cassandra/db/compaction/CompactionController.html" title="class in org.apache.cassandra.db.compaction">CompactionController</a> controller, java.util.List<? extends <a href="../../../../../org/apache/cassandra/db/columniterator/OnDiskAtomIterator.html" title="interface in org.apache.cassandra.db.columniterator">OnDiskAtomIterator</a>> rows)</pre> </li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_detail">  </a> <h3>Method Detail</h3> <a name="write(long, org.apache.cassandra.io.util.DataOutputPlus)">  </a> <ul class="blockList"> <li class="blockList"> <h4>write</h4> <pre>public <a href="../../../../../org/apache/cassandra/db/RowIndexEntry.html" title="class in org.apache.cassandra.db">RowIndexEntry</a> write(long currentPosition, <a href="../../../../../org/apache/cassandra/io/util/DataOutputPlus.html" title="interface in org.apache.cassandra.io.util">DataOutputPlus</a> out) throws java.io.IOException</pre> <div class="block"><strong>Description copied from class: <code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html#write(long,%20org.apache.cassandra.io.util.DataOutputPlus)">AbstractCompactedRow</a></code></strong></div> <div class="block">write the row (size + column index + filter + column data, but NOT row key) to @param out. write() may change internal state; it is NOT valid to call write() or update() a second time.</div> <dl> <dt><strong>Specified by:</strong></dt> <dd><code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html#write(long,%20org.apache.cassandra.io.util.DataOutputPlus)">write</a></code> in class <code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html" title="class in org.apache.cassandra.db.compaction">AbstractCompactedRow</a></code></dd> <dt><span class="strong">Returns:</span></dt><dd>index information for the written row, or null if the compaction resulted in only expired tombstones.</dd> <dt><span class="strong">Throws:</span></dt> <dd><code>java.io.IOException</code></dd></dl> </li> </ul> <a name="update(java.security.MessageDigest)">  </a> <ul class="blockList"> <li class="blockList"> <h4>update</h4> <pre>public void update(java.security.MessageDigest digest)</pre> <div class="block"><strong>Description copied from class: <code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html#update(java.security.MessageDigest)">AbstractCompactedRow</a></code></strong></div> <div class="block">update @param digest with the data bytes of the row (not including row key or row size). May be called even if empty. update() may change internal state; it is NOT valid to call write() or update() a second time.</div> <dl> <dt><strong>Specified by:</strong></dt> <dd><code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html#update(java.security.MessageDigest)">update</a></code> in class <code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html" title="class in org.apache.cassandra.db.compaction">AbstractCompactedRow</a></code></dd> </dl> </li> </ul> <a name="columnStats()">  </a> <ul class="blockList"> <li class="blockList"> <h4>columnStats</h4> <pre>public <a href="../../../../../org/apache/cassandra/io/sstable/ColumnStats.html" title="class in org.apache.cassandra.io.sstable">ColumnStats</a> columnStats()</pre> <dl> <dt><strong>Specified by:</strong></dt> <dd><code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html#columnStats()">columnStats</a></code> in class <code><a href="../../../../../org/apache/cassandra/db/compaction/AbstractCompactedRow.html" title="class in org.apache.cassandra.db.compaction">AbstractCompactedRow</a></code></dd> <dt><span class="strong">Returns:</span></dt><dd>aggregate information about the columns in this row. Some fields may contain default values if computing them value would require extra effort we're not willing to make.</dd></dl> </li> </ul> <a name="close()">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>close</h4> <pre>public void close()</pre> </li> </ul> </li> </ul> </li> </ul> </div> </div>   <div class="bottomNav"><a name="navbar_bottom">  </a><a href="#skip-navbar_bottom" title="Skip navigation links"></a><a name="navbar_bottom_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/LazilyCompactedRow.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/db/compaction/ICompactionScanner.html" title="interface in org.apache.cassandra.db.compaction"><span class="strong">Prev Class</span></a></li> <li><a href="../../../../../org/apache/cassandra/db/compaction/LeveledCompactionStrategy.html" title="class in org.apache.cassandra.db.compaction"><span class="strong">Next Class</span></a></li> </ul> <ul class="navList"> <li><a href="../../../../../index.html?org/apache/cassandra/db/compaction/LazilyCompactedRow.html" target="_top">Frames</a></li> <li><a href="LazilyCompactedRow.html" target="_top">No Frames</a></li> </ul> <ul class="navList" id="allclasses_navbar_bottom"> <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>Nested | </li> <li><a href="#fields_inherited_from_class_org.apache.cassandra.db.compaction.AbstractCompactedRow">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>Field | </li> <li><a href="#constructor_detail">Constr</a> | </li> <li><a href="#method_detail">Method</a></li> </ul> </div> <a name="skip-navbar_bottom">  </a></div>  <p class="legalCopy"><small>Copyright © 2014 The Apache Software Foundation</small></p> </body> </html>