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| <h2 title="Interface Coprocessor" class="title">Interface Coprocessor</h2> |
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| <dt>All Known Subinterfaces:</dt> |
| <dd><a href="../../../../org/apache/hadoop/hbase/coprocessor/MasterCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">MasterCoprocessor</a>, <a href="../../../../org/apache/hadoop/hbase/coprocessor/RegionCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionCoprocessor</a>, <a href="../../../../org/apache/hadoop/hbase/coprocessor/RegionServerCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">RegionServerCoprocessor</a>, <a href="../../../../org/apache/hadoop/hbase/coprocessor/WALCoprocessor.html" title="interface in org.apache.hadoop.hbase.coprocessor">WALCoprocessor</a></dd> |
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| </dl> |
| <hr> |
| <br> |
| <pre>@InterfaceAudience.LimitedPrivate(value="Coprocesssor") |
| @InterfaceStability.Evolving |
| public interface <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.61">Coprocessor</a></pre> |
| <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> |
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| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Interface and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.State.html" title="enum in org.apache.hadoop.hbase">Coprocessor.State</a></span></code> |
| <div class="block">Lifecycle state of a given coprocessor instance.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_HIGHEST">PRIORITY_HIGHEST</a></span></code> |
| <div class="block">Highest installation priority</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_LOWEST">PRIORITY_LOWEST</a></span></code> |
| <div class="block">Lowest installation priority</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_SYSTEM">PRIORITY_SYSTEM</a></span></code> |
| <div class="block">High (system) installation priority</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#PRIORITY_USER">PRIORITY_USER</a></span></code> |
| <div class="block">Default installation priority for user coprocessors</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#VERSION">VERSION</a></span></code> </td> |
| </tr> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t5" class="tableTab"><span><a href="javascript:show(16);">Default Methods</a></span><span class="tabEnd"> </span></span></caption> |
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| <td class="colFirst"><code>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><org.apache.hbase.thirdparty.com.google.protobuf.Service></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#getServices--">getServices</a></span>()</code> |
| <div class="block">Coprocessor endpoints providing protobuf services should override this method.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>default void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#start-org.apache.hadoop.hbase.CoprocessorEnvironment-">start</a></span>(<a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env)</code> |
| <div class="block">Called by the <a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own startup to initialize the |
| coprocessor.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>default void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/hadoop/hbase/Coprocessor.html#stop-org.apache.hadoop.hbase.CoprocessorEnvironment-">stop</a></span>(<a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env)</code> |
| <div class="block">Called by the <a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own shutdown to stop the |
| coprocessor.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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| </a> |
| <h3>Field Detail</h3> |
| <a name="VERSION"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>VERSION</h4> |
| <pre>static final int <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.62">VERSION</a></pre> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.VERSION">Constant Field Values</a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="PRIORITY_HIGHEST"> |
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| </a> |
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| <li class="blockList"> |
| <h4>PRIORITY_HIGHEST</h4> |
| <pre>static final int <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.65">PRIORITY_HIGHEST</a></pre> |
| <div class="block">Highest installation priority</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_HIGHEST">Constant Field Values</a></dd> |
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| </li> |
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| <a name="PRIORITY_SYSTEM"> |
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| <h4>PRIORITY_SYSTEM</h4> |
| <pre>static final int <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.67">PRIORITY_SYSTEM</a></pre> |
| <div class="block">High (system) installation priority</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_SYSTEM">Constant Field Values</a></dd> |
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| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>PRIORITY_USER</h4> |
| <pre>static final int <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.69">PRIORITY_USER</a></pre> |
| <div class="block">Default installation priority for user coprocessors</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_USER">Constant Field Values</a></dd> |
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| <a name="PRIORITY_LOWEST"> |
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| <h4>PRIORITY_LOWEST</h4> |
| <pre>static final int <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.71">PRIORITY_LOWEST</a></pre> |
| <div class="block">Lowest installation priority</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../constant-values.html#org.apache.hadoop.hbase.Coprocessor.PRIORITY_LOWEST">Constant Field Values</a></dd> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="start-org.apache.hadoop.hbase.CoprocessorEnvironment-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>start</h4> |
| <pre>default void <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.89">start</a>(<a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env) |
| 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">Called by the <a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own startup to initialize the |
| coprocessor.</div> |
| <dl> |
| <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> |
| </dl> |
| </li> |
| </ul> |
| <a name="stop-org.apache.hadoop.hbase.CoprocessorEnvironment-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>stop</h4> |
| <pre>default void <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.95">stop</a>(<a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> env) |
| 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">Called by the <a href="../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase"><code>CoprocessorEnvironment</code></a> during it's own shutdown to stop the |
| coprocessor.</div> |
| <dl> |
| <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> |
| </dl> |
| </li> |
| </ul> |
| <a name="getServices--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>getServices</h4> |
| <pre>default <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><org.apache.hbase.thirdparty.com.google.protobuf.Service> <a href="../../../../src-html/org/apache/hadoop/hbase/Coprocessor.html#line.102">getServices</a>()</pre> |
| <div class="block">Coprocessor endpoints providing protobuf services should override this method.</div> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Iterable of <code>Service</code>s or empty collection. Implementations should never |
| return null.</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
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