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You can use the <code>options</code> to change max + versions and TTL for the scanner being opened.</div> <dl> <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> -<dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preFlush-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">preFlush</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> +<dd><code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preFlushScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker-">preFlushScannerOpen</a></code> in interface <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionObserver</a></code></dd> <dt><span class="paramLabel">Parameters:</span></dt> <dd><code>c</code> - the environment provided by the region server</dd> -<dd><code>store</code> - the store where compaction is being requested</dd> -<dd><code>scanner</code> - the scanner over existing data used in the store file</dd> -<dd><code>tracker</code> - tracker used to track the life cycle of a flush</dd> -<dt><span class="returnLabel">Returns:</span></dt> -<dd>the scanner to use during compaction. Should not be <code>null</code> - unless the implementation is writing new store files on its own.</dd> +<dd><code>store</code> - the store where flush is being requested</dd> +<dd><code>options</code> - used to change max versions and TTL for the scanner being opened</dd> <dt><span class="throwsLabel">Throws:</span></dt> <dd><code><a href="http://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="preCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-"> +<a name="preCompactScannerOpen-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.ScanOptions-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-"> <!-- --> </a> <ul class="blockListLast"> <li class="blockList"> -<h4>preCompact</h4> -<pre>public <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ZooKeeperScanPolicyObserver.html#line.197">preCompact</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, +<h4>preCompactScannerOpen</h4> +<pre>public void <a href="../../../../../../src-html/org/apache/hadoop/hbase/coprocessor/example/ZooKeeperScanPolicyObserver.html#line.186">preCompactScannerOpen</a>(<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><<a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessorEnvironment</a>> c, <a href="../../../../../../org/apache/hadoop/hbase/regionserver/Store.html" title="interface in org.apache.hadoop.hbase.regionserver">Store</a> store, - <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver">InternalScanner</a> scanner, <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanType.html" title="enum in org.apache.hadoop.hbase.regionserver">ScanType</a> scanType, + <a href="../../../../../../org/apache/hadoop/hbase/regionserver/ScanOptions.html" title="interface in org.apache.hadoop.hbase.regionserver">ScanOptions</a> options, <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionLifeCycleTracker.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionLifeCycleTracker</a> tracker, <a href="../../../../../../org/apache/hadoop/hbase/regionserver/compactions/CompactionRequest.html" title="interface in org.apache.hadoop.hbase.regionserver.compactions">CompactionRequest</a> request) throws <a href="http://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"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/RegionObserver.html#preCompact-org.apache.hadoop.hbase.coprocessor.ObserverContext-org.apache.hadoop.hbase.regionserver.Store-org.apache.hadoop.hbase.regionserver.InternalScanner-org.apache.hadoop.hbase.regionserver.ScanType-org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker-org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest-">RegionObserver</a></code></span></div> -<div class="block">Called prior to writing the <a href="../../../../../../org/apache/hadoop/hbase/regionserver/StoreFile.html" title="interface in org.apache.hadoop.hbase.regionserver"><code>StoreFile</code></a>s selected for compaction into a new - <code>StoreFile</code>. - <p> - To override or modify the compaction process, implementing classes can wrap the provided - <a href="../../../../../../org/apache/hadoop/hbase/regionserver/InternalScanner.html" title="interface in org.apache.hadoop.hbase.regionserver"><code>InternalScanner</code></a> with a custom implementation that is returned from this method. 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All rights reserved.</small></p> +</body> +</html> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1d9053bc/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-frame.html ---------------------------------------------------------------------- diff --git a/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-frame.html b/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-frame.html index f44b778..ce11a25 100644 --- a/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-frame.html +++ b/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-frame.html @@ -20,6 +20,7 @@ <li><a href="ExampleRegionObserverWithMetrics.html" title="class in org.apache.hadoop.hbase.coprocessor.example" target="classFrame">ExampleRegionObserverWithMetrics</a></li> <li><a href="RefreshHFilesEndpoint.html" title="class in org.apache.hadoop.hbase.coprocessor.example" target="classFrame">RefreshHFilesEndpoint</a></li> <li><a href="RowCountEndpoint.html" title="class in org.apache.hadoop.hbase.coprocessor.example" target="classFrame">RowCountEndpoint</a></li> +<li><a href="WriteHeavyIncrementObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example" target="classFrame">WriteHeavyIncrementObserver</a></li> <li><a href="ZooKeeperScanPolicyObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example" target="classFrame">ZooKeeperScanPolicyObserver</a></li> <li><a href="ZooKeeperScanPolicyObserver.ZKDataHolder.html" title="class in org.apache.hadoop.hbase.coprocessor.example" target="classFrame">ZooKeeperScanPolicyObserver.ZKDataHolder</a></li> </ul> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/1d9053bc/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-summary.html ---------------------------------------------------------------------- diff --git a/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-summary.html b/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-summary.html index de5e16b..b2c7886 100644 --- a/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-summary.html +++ b/devapidocs/org/apache/hadoop/hbase/coprocessor/example/package-summary.html @@ -125,13 +125,19 @@ </td> </tr> <tr class="altColor"> +<td class="colFirst"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/WriteHeavyIncrementObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example">WriteHeavyIncrementObserver</a></td> +<td class="colLast"> +<div class="block">An example for implementing a counter that reads is much less than writes, i.e, write heavy.</div> +</td> +</tr> +<tr class="rowColor"> <td class="colFirst"><a href="../../../../../../org/apache/hadoop/hbase/coprocessor/example/ZooKeeperScanPolicyObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ZooKeeperScanPolicyObserver</a></td> <td class="colLast"> <div class="block">This 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