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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</a></div> |
| <h1 title="Interface Coprocessor" class="title">Interface Coprocessor</h1> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><code><a href="coprocessor/MasterCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessor</a></code>, <code><a href="coprocessor/RegionCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessor</a></code>, <code><a href="coprocessor/RegionServerCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionServerCoprocessor</a></code>, <code><a href="coprocessor/WALCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">WALCoprocessor</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><code><a href="security/access/AccessController.html" title="class in org.apache.hadoop.hbase.security.access">AccessController</a></code>, <code><a href="backup/BackupObserver.html" title="class in org.apache.hadoop.hbase.backup">BackupObserver</a></code>, <code><a href="coprocessor/example/BulkDeleteEndpoint.html" title="class in org.apache.hadoop.hbase.coprocessor.example">BulkDeleteEndpoint</a></code>, <code><a href="constraint/ConstraintProcessor.html" title="class in org.apache.hadoop.hbase.constraint">ConstraintProcessor</a></code>, <code><a href="security/access/CoprocessorWhitelistMasterObserver.html" title="class in org.apache.hadoop.hbase.security.access">CoprocessorWhitelistMasterObserver</a></code>, <code><a href="coprocessor/example/ExampleMasterObserverWithMetrics.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ExampleMasterObserverWithMetrics</a></code>, <code><a href="coprocessor/example/ExampleRegionObserverWithMetrics.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ExampleRegionObserverWithMetrics</a></code>, <code><a href="coprocessor/example/ExampleRegionObserverWithMetrics.ExampleRegionObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ExampleRegionObserverWithMetrics.ExampleRegionObserver</a></code>, <code><a href="JMXListener.html" title="class in org.apache.hadoop.hbase">JMXListener</a></code>, <code><a href="quotas/MasterQuotasObserver.html" title="class in org.apache.hadoop.hbase.quotas">MasterQuotasObserver</a></code>, <code><a href="coprocessor/MetaTableMetrics.html" title="class in org.apache.hadoop.hbase.coprocessor">MetaTableMetrics</a></code>, <code><a href="coprocessor/MetaTableMetrics.ExampleRegionObserverMeta.html" title="class in org.apache.hadoop.hbase.coprocessor">MetaTableMetrics.ExampleRegionObserverMeta</a></code>, <code><a href="coprocessor/MultiRowMutationEndpoint.html" title="class in org.apache.hadoop.hbase.coprocessor">MultiRowMutationEndpoint</a></code>, <code><a href="coprocessor/example/RefreshHFilesEndpoint.html" title="class in org.apache.hadoop.hbase.coprocessor.example">RefreshHFilesEndpoint</a></code>, <code><a href="replication/regionserver/ReplicationObserver.html" title="class in org.apache.hadoop.hbase.replication.regionserver">ReplicationObserver</a></code>, <code><a href="coprocessor/example/RowCountEndpoint.html" title="class in org.apache.hadoop.hbase.coprocessor.example">RowCountEndpoint</a></code>, <code><a href="rsgroup/RSGroupAdminEndpoint.html" title="class in org.apache.hadoop.hbase.rsgroup">RSGroupAdminEndpoint</a></code>, <code><a href="coprocessor/example/ScanModifyingObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ScanModifyingObserver</a></code>, <code><a href="security/access/SnapshotScannerHDFSAclController.html" title="class in org.apache.hadoop.hbase.security.access">SnapshotScannerHDFSAclController</a></code>, <code><a href="security/token/TokenProvider.html" title="class in org.apache.hadoop.hbase.security.token">TokenProvider</a></code>, <code><a href="coprocessor/example/ValueRewritingObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ValueRewritingObserver</a></code>, <code><a href="security/visibility/VisibilityController.html" title="class in org.apache.hadoop.hbase.security.visibility">VisibilityController</a></code>, <code><a href="security/visibility/VisibilityReplication.html" title="class in org.apache.hadoop.hbase.security.visibility">VisibilityReplication</a></code>, <code><a href="coprocessor/example/WriteHeavyIncrementObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example">WriteHeavyIncrementObserver</a></code>, <code><a href="tool/WriteSinkCoprocessor.html" title="class in org.apache.hadoop.hbase.tool">WriteSinkCoprocessor</a></code>, <code><a href="coprocessor/example/ZooKeeperScanPolicyObserver.html" title="class in org.apache.hadoop.hbase.coprocessor.example">ZooKeeperScanPolicyObserver</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="annotations">@LimitedPrivate("Coprocesssor") |
| @Evolving |
| </span><span class="modifiers">public interface </span><span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-57">Coprocessor</a></span></div> |
| <div class="block">Base interface for the 4 coprocessors - MasterCoprocessor, RegionCoprocessor, |
| RegionServerCoprocessor, and WALCoprocessor. Do NOT implement this interface directly. Unless an |
| implementation implements one (or more) of the above mentioned 4 coprocessors, it'll fail to be |
| loaded by any coprocessor host. Example: Building a coprocessor to observe Master operations. |
| |
| <pre> |
| class MyMasterCoprocessor implements MasterCoprocessor { |
| @Override |
| public Optional<MasterObserver> getMasterObserver() { |
| return new MyMasterObserver(); |
| } |
| } |
| |
| class MyMasterObserver implements MasterObserver { |
| .... |
| } |
| </pre> |
| |
| Building a Service which can be loaded by both Master and RegionServer |
| |
| <pre> |
| class MyCoprocessorService implements MasterCoprocessor, RegionServerCoprocessor { |
| @Override |
| public Optional<Service> getServices() { |
| return new ...; |
| } |
| } |
| </pre></div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <li> |
| <section class="nested-class-summary" id="nested-class-summary"> |
| <h2>Nested Class Summary</h2> |
| <div class="caption"><span>Nested Classes</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Interface</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>static enum </code></div> |
| <div class="col-second even-row-color"><code><a href="Coprocessor.State.html" class="type-name-link" title="enum class in org.apache.hadoop.hbase">Coprocessor.State</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Lifecycle state of a given coprocessor instance.</div> |
| </div> |
| </div> |
| </section> |
| </li> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <li> |
| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="caption"><span>Fields</span></div> |
| <div class="summary-table three-column-summary"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Field</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>static final int</code></div> |
| <div class="col-second even-row-color"><code><a href="#PRIORITY_HIGHEST" class="member-name-link">PRIORITY_HIGHEST</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">Highest installation priority</div> |
| </div> |
| <div class="col-first odd-row-color"><code>static final int</code></div> |
| <div class="col-second odd-row-color"><code><a href="#PRIORITY_LOWEST" class="member-name-link">PRIORITY_LOWEST</a></code></div> |
| <div class="col-last odd-row-color"> |
| <div class="block">Lowest installation priority</div> |
| </div> |
| <div class="col-first even-row-color"><code>static final int</code></div> |
| <div class="col-second even-row-color"><code><a href="#PRIORITY_SYSTEM" class="member-name-link">PRIORITY_SYSTEM</a></code></div> |
| <div class="col-last even-row-color"> |
| <div class="block">High (system) installation priority</div> |
| </div> |
| <div class="col-first odd-row-color"><code>static final int</code></div> |
| <div class="col-second odd-row-color"><code><a href="#PRIORITY_USER" class="member-name-link">PRIORITY_USER</a></code></div> |
| <div class="col-last odd-row-color"> |
| <div class="block">Default installation priority for user coprocessors</div> |
| </div> |
| <div class="col-first even-row-color"><code>static final int</code></div> |
| <div class="col-second even-row-color"><code><a href="#VERSION" class="member-name-link">VERSION</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
| <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab5" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab5', 3)" class="table-tab">Default Methods</button></div> |
| <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-tab5"><code>default <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Iterable.html" title="class or interface in java.lang" class="external-link">Iterable</a><org.apache.hbase.thirdparty.com.google.protobuf.Service></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#getServices()" class="member-name-link">getServices</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Coprocessor endpoints providing protobuf services should override this method.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default void</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#start(org.apache.hadoop.hbase.CoprocessorEnvironment)" class="member-name-link">start</a><wbr>(<a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Called by the <a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own startup to initialize the |
| coprocessor.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code>default void</code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"><code><a href="#stop(org.apache.hadoop.hbase.CoprocessorEnvironment)" class="member-name-link">stop</a><wbr>(<a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab5"> |
| <div class="block">Called by the <a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own shutdown to stop the coprocessor.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li> |
| <section class="field-details" id="field-detail"> |
| <h2>Field Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="VERSION"> |
| <h3>VERSION</h3> |
| <div class="member-signature"><span class="modifiers">static final</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-60">VERSION</a></span></div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.VERSION">Constant Field Values</a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="PRIORITY_HIGHEST"> |
| <h3>PRIORITY_HIGHEST</h3> |
| <div class="member-signature"><span class="modifiers">static final</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-63">PRIORITY_HIGHEST</a></span></div> |
| <div class="block">Highest installation priority</div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_HIGHEST">Constant Field Values</a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="PRIORITY_SYSTEM"> |
| <h3>PRIORITY_SYSTEM</h3> |
| <div class="member-signature"><span class="modifiers">static final</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-65">PRIORITY_SYSTEM</a></span></div> |
| <div class="block">High (system) installation priority</div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_SYSTEM">Constant Field Values</a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="PRIORITY_USER"> |
| <h3>PRIORITY_USER</h3> |
| <div class="member-signature"><span class="modifiers">static final</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-67">PRIORITY_USER</a></span></div> |
| <div class="block">Default installation priority for user coprocessors</div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_USER">Constant Field Values</a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="PRIORITY_LOWEST"> |
| <h3>PRIORITY_LOWEST</h3> |
| <div class="member-signature"><span class="modifiers">static final</span> <span class="return-type">int</span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-69">PRIORITY_LOWEST</a></span></div> |
| <div class="block">Lowest installation priority</div> |
| <dl class="notes"> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list"> |
| <li><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_LOWEST">Constant Field Values</a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="start(org.apache.hadoop.hbase.CoprocessorEnvironment)"> |
| <h3>start</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">void</span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-87">start</a></span><wbr><span class="parameters">(<a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env)</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">Called by the <a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own startup to initialize the |
| coprocessor.</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="stop(org.apache.hadoop.hbase.CoprocessorEnvironment)"> |
| <h3>stop</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type">void</span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-93">stop</a></span><wbr><span class="parameters">(<a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env)</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">Called by the <a href="CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own shutdown to stop the coprocessor.</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="getServices()"> |
| <h3>getServices</h3> |
| <div class="member-signature"><span class="modifiers">default</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Iterable.html" title="class or interface in java.lang" class="external-link">Iterable</a><org.apache.hbase.thirdparty.com.google.protobuf.Service></span> <span class="element-name"><a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line-101">getServices</a></span>()</div> |
| <div class="block">Coprocessor endpoints providing protobuf services should override this method.</div> |
| <dl class="notes"> |
| <dt>Returns:</dt> |
| <dd>Iterable of <code>Service</code>s or empty collection. Implementations should never return |
| null.</dd> |
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