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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.hadoop.hbase.wal</a></div> |
| <h1 title="Interface WALStreamReader" class="title">Interface WALStreamReader</h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Superinterfaces:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html" title="class or interface in java.lang" class="external-link">AutoCloseable</a></code>, <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="../regionserver/wal/ProtobufWALStreamReader.html" title="class in org.apache.hadoop.hbase.regionserver.wal">ProtobufWALStreamReader</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="annotations">@Private |
| </span><span class="modifiers">public interface </span><span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/wal/WALStreamReader.html#line-32">WALStreamReader</a></span><span class="extends-implements"> |
| extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></span></div> |
| <div class="block">A one way WAL reader, without reset and seek support. |
| <p/> |
| In most cases you should use this interface to read WAL file, as the implementation is simple and |
| robust. For replication, where we want to tail the WAL file which is currently being written, you |
| should use <a href="WALTailingReader.html" title="interface in org.apache.hadoop.hbase.wal"><code>WALTailingReader</code></a> instead.</div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="WALTailingReader.html" title="interface in org.apache.hadoop.hbase.wal"><code>WALTailingReader</code></a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| <section class="summary"> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
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| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#close()" class="member-name-link">close</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Override to remove the 'throws IOException' as we are just a reader.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code>long</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#getPosition()" class="member-name-link">getPosition</a>()</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Get the current reading position.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default <a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal">WAL.Entry</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#next()" class="member-name-link">next</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Read the next entry in WAL.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal">WAL.Entry</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"><code><a href="#next(org.apache.hadoop.hbase.wal.WAL.Entry)" class="member-name-link">next</a><wbr>(<a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal">WAL.Entry</a> reuse)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab3"> |
| <div class="block">Read the next entry in WAL, use the given <a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal"><code>WAL.Entry</code></a> if not <code>null</code> to hold the |
| data.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="next()"> |
| <h3>next</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type"><a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal">WAL.Entry</a></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/wal/WALStreamReader.html#line-41">next</a></span>() |
| throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div> |
| <div class="block">Read the next entry in WAL. |
| <p/> |
| In most cases you should just use this method, especially when reading a closed wal file for |
| splitting or printing.</div> |
| <dl class="notes"> |
| <dt>Throws:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="next(org.apache.hadoop.hbase.wal.WAL.Entry)"> |
| <h3>next</h3> |
| <div class="member-signature"><span class="return-type"><a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal">WAL.Entry</a></span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/wal/WALStreamReader.html#line-52">next</a></span><wbr><span class="parameters">(<a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal">WAL.Entry</a> reuse)</span> |
| throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div> |
| <div class="block">Read the next entry in WAL, use the given <a href="WAL.Entry.html" title="class in org.apache.hadoop.hbase.wal"><code>WAL.Entry</code></a> if not <code>null</code> to hold the |
| data. |
| <p/> |
| Mainly used in MR.</div> |
| <dl class="notes"> |
| <dt>Parameters:</dt> |
| <dd><code>reuse</code> - the entry to be used for reading, can be <code>null</code></dd> |
| <dt>Throws:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="getPosition()"> |
| <h3>getPosition</h3> |
| <div class="member-signature"><span class="return-type">long</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/wal/WALStreamReader.html#line-57">getPosition</a></span>() |
| throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></span></div> |
| <div class="block">Get the current reading position.</div> |
| <dl class="notes"> |
| <dt>Throws:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link">IOException</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="close()"> |
| <h3>close</h3> |
| <div class="member-signature"><span class="return-type">void</span> <span class="element-name"><a href="../../../../../src-html/org/apache/hadoop/hbase/wal/WALStreamReader.html#line-62">close</a></span>()</div> |
| <div class="block">Override to remove the 'throws IOException' as we are just a reader.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html#close()" title="class or interface in java.lang" class="external-link">close</a></code> in interface <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/AutoCloseable.html" title="class or interface in java.lang" class="external-link">AutoCloseable</a></code></dd> |
| <dt>Specified by:</dt> |
| <dd><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html#close()" title="class or interface in java.io" class="external-link">close</a></code> in interface <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/io/Closeable.html" title="class or interface in java.io" class="external-link">Closeable</a></code></dd> |
| </dl> |
| </section> |
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