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| <div class="subTitle">org.apache.hadoop.hbase.io.hfile.bucket</div> |
| <h2 title="Class PersistentIOEngine" class="title">Class PersistentIOEngine</h2> |
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| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/FileIOEngine.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">FileIOEngine</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/FileMmapIOEngine.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">FileMmapIOEngine</a></dd> |
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| <pre>@InterfaceAudience.Private |
| public abstract class <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.36">PersistentIOEngine</a> |
| 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="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html" title="interface in org.apache.hadoop.hbase.io.hfile.bucket">IOEngine</a></pre> |
| <div class="block">A class implementing PersistentIOEngine interface supports file integrity verification |
| for <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket"><code>BucketCache</code></a> which use persistent IOEngine</div> |
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| <td class="colFirst"><code>private static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.DuFileCommand.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">PersistentIOEngine.DuFileCommand</a></span></code> </td> |
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| <td class="colFirst"><code>private static <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.DuFileCommand.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">PersistentIOEngine.DuFileCommand</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#DU">DU</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <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>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#filePaths">filePaths</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#LOG">LOG</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#PersistentIOEngine-java.lang.String...-">PersistentIOEngine</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>... filePaths)</code> </td> |
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| <td class="colFirst"><code>protected byte[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#calculateChecksum-java.lang.String-">calculateChecksum</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> algorithm)</code> |
| <div class="block">Using an encryption algorithm to calculate a checksum, the default encryption algorithm is MD5</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#getFileSize-java.lang.String-">getFileSize</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> filePath)</code> |
| <div class="block">Using Linux command du to get file's real size</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#verifyFileIntegrity-byte:A-java.lang.String-">verifyFileIntegrity</a></span>(byte[] persistentChecksum, |
| <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> algorithm)</code> |
| <div class="block">Verify cache files's integrity</div> |
| </td> |
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| <h3>Methods inherited from class java.lang.<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></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
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| <h3>Methods inherited from interface org.apache.hadoop.hbase.io.hfile.bucket.<a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html" title="interface in org.apache.hadoop.hbase.io.hfile.bucket">IOEngine</a></h3> |
| <code><a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#isPersistent--">isPersistent</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#read-org.apache.hadoop.hbase.io.hfile.bucket.BucketEntry-">read</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#shutdown--">shutdown</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#sync--">sync</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#usesSharedMemory--">usesSharedMemory</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#write-java.nio.ByteBuffer-long-">write</a>, <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/IOEngine.html#write-org.apache.hadoop.hbase.nio.ByteBuff-long-">write</a></code></li> |
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| <h3>Field Detail</h3> |
| <a name="LOG"> |
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| <h4>LOG</h4> |
| <pre>private static final org.slf4j.Logger <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.37">LOG</a></pre> |
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| <h4>DU</h4> |
| <pre>private static final <a href="../../../../../../../org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.DuFileCommand.html" title="class in org.apache.hadoop.hbase.io.hfile.bucket">PersistentIOEngine.DuFileCommand</a> <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.38">DU</a></pre> |
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| <h4>filePaths</h4> |
| <pre>protected final <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>[] <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.39">filePaths</a></pre> |
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| <a name="PersistentIOEngine-java.lang.String...-"> |
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| <h4>PersistentIOEngine</h4> |
| <pre>public <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.41">PersistentIOEngine</a>(<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>... filePaths)</pre> |
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| <h4>verifyFileIntegrity</h4> |
| <pre>protected void <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.49">verifyFileIntegrity</a>(byte[] persistentChecksum, |
| <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> algorithm) |
| 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">Verify cache files's integrity</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>algorithm</code> - the backingMap persistence path</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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| <h4>calculateChecksum</h4> |
| <pre>protected byte[] <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.65">calculateChecksum</a>(<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> algorithm)</pre> |
| <div class="block">Using an encryption algorithm to calculate a checksum, the default encryption algorithm is MD5</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the checksum which is convert to HexString</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> - something happened like file not exists</dd> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/security/NoSuchAlgorithmException.html?is-external=true" title="class or interface in java.security">NoSuchAlgorithmException</a></code> - no such algorithm</dd> |
| </dl> |
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| <h4>getFileSize</h4> |
| <pre>private static long <a href="../../../../../../../src-html/org/apache/hadoop/hbase/io/hfile/bucket/PersistentIOEngine.html#line.92">getFileSize</a>(<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> filePath) |
| 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">Using Linux command du to get file's real size</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>filePath</code> - the file</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>file's real size</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> - something happened like file not exists</dd> |
| </dl> |
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