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| <div class="subTitle">org.apache.hadoop.hbase.coprocessor</div> |
| <h2 title="Class ObserverContextImpl" class="title">Class ObserverContextImpl<E extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a>></h2> |
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| <li>org.apache.hadoop.hbase.coprocessor.ObserverContextImpl<E></li> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><E></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/coprocessor/CoprocessorHost.ObserverOperation.html" title="class in org.apache.hadoop.hbase.coprocessor">CoprocessorHost.ObserverOperation</a></dd> |
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| <br> |
| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.31">ObserverContextImpl</a><E extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</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/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><E></pre> |
| <div class="block">This is the only implementation of <a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor"><code>ObserverContext</code></a>, which serves as the interface for |
| third-party Coprocessor developers.</div> |
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| <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>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#bypass">bypass</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#bypassable">bypassable</a></span></code> |
| <div class="block">Is this operation bypassable?</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#caller">caller</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#env">env</a></span></code> </td> |
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| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#ObserverContextImpl-org.apache.hadoop.hbase.security.User-">ObserverContextImpl</a></span>(<a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a> caller)</code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#ObserverContextImpl-org.apache.hadoop.hbase.security.User-boolean-">ObserverContextImpl</a></span>(<a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a> caller, |
| boolean bypassable)</code> </td> |
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| <h3>Method Summary</h3> |
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| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span><span id="t6" class="tableTab"><span><a href="javascript:show(32);">Deprecated Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#bypass--">bypass</a></span>()</code> |
| <div class="block">Call to indicate that the current coprocessor's return value (or parameter -- depends on the |
| call-type) should be used in place of the value that would be obtained via normal processing; |
| i.e.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <E extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a>><br><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><E></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#createAndPrepare-E-">createAndPrepare</a></span>(E env)</code> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a><<a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#getCaller--">getCaller</a></span>()</code> |
| <div class="block">Returns the active user for the coprocessor call.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#getEnvironment--">getEnvironment</a></span>()</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#isBypassable--">isBypassable</a></span>()</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#prepare-E-">prepare</a></span>(<a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a> env)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#shouldBypass--">shouldBypass</a></span>()</code> </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> |
| </ul> |
| </li> |
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| <h4>env</h4> |
| <pre>private <a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a> extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.32">env</a></pre> |
| </li> |
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| <h4>bypass</h4> |
| <pre>private boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.33">bypass</a></pre> |
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| <h4>bypassable</h4> |
| <pre>private final boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.37">bypassable</a></pre> |
| <div class="block">Is this operation bypassable?</div> |
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| <a name="caller"> |
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| <h4>caller</h4> |
| <pre>private final <a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.38">caller</a></pre> |
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| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.40">ObserverContextImpl</a>(<a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a> caller)</pre> |
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| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.44">ObserverContextImpl</a>(<a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a> caller, |
| boolean bypassable)</pre> |
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| <pre>public <a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.50">getEnvironment</a>()</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html#getEnvironment--">getEnvironment</a></code> in interface <code><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/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a> extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a>></code></dd> |
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| <a name="prepare-org.apache.hadoop.hbase.CoprocessorEnvironment-"> |
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| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.54">prepare</a>(<a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a> env)</pre> |
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| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.58">isBypassable</a>()</pre> |
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| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.63">bypass</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html#bypass--">ObserverContext</a></code></span></div> |
| <div class="block">Call to indicate that the current coprocessor's return value (or parameter -- depends on the |
| call-type) should be used in place of the value that would be obtained via normal processing; |
| i.e. bypass the core call and return the Coprocessor's result instead. DOES NOT work for all |
| Coprocessor invocations, only on a small subset of methods, mostly preXXX calls in |
| RegionObserver. Check javadoc on the pertinent Coprocessor Observer to see if |
| <code>bypass</code> is supported. |
| <p>This behavior of honoring only a subset of methods is new since hbase-2.0.0. |
| <p>Where bypass is supported what is being bypassed is all of the core code |
| implementing the remainder of the operation. In order to understand what |
| calling bypass() will skip, a coprocessor implementer should read and |
| understand all of the remaining code and its nuances. Although this |
| is good practice for coprocessor developers in general, it demands a lot. |
| What is skipped is extremely version dependent. The core code will vary, perhaps significantly, |
| even between point releases. We do not provide the promise of consistent behavior even between |
| point releases for the bypass semantic. To achieve |
| that we could not change any code between hook points. Therefore the |
| coprocessor implementer becomes an HBase core developer in practice as soon |
| as they rely on bypass(). Every release of HBase may break the assumption |
| that the replacement for the bypassed code takes care of all necessary |
| skipped concerns. Because those concerns can change at any point, such an |
| assumption is never safe.</p> |
| <p>As of hbase2, when bypass has been set, we will NOT call any Coprocessors follow the |
| bypassing Coprocessor; we cut short the processing and return the bypassing Coprocessors |
| response (this used be a separate 'complete' option that has been folded into the |
| 'bypass' in hbase2.</p></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html#bypass--">bypass</a></code> in interface <code><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/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a> extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a>></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="shouldBypass--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>shouldBypass</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.74">shouldBypass</a>()</pre> |
| <dl> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><code>true</code>, if <a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html#bypass--"><code>ObserverContext.bypass()</code></a> was called by one of the loaded |
| coprocessors, <code>false</code> otherwise.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getCaller--"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>getCaller</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html?is-external=true" title="class or interface in java.util">Optional</a><<a href="../../../../../org/apache/hadoop/hbase/security/User.html" title="class in org.apache.hadoop.hbase.security">User</a>> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.86">getCaller</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html#getCaller--">ObserverContext</a></code></span></div> |
| <div class="block">Returns the active user for the coprocessor call. If an explicit <code>User</code> instance was |
| provided to the constructor, that will be returned, otherwise if we are in the context of an |
| RPC call, the remote user is used. May not be present if the execution is outside of an RPC |
| context.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html#getCaller--">getCaller</a></code> in interface <code><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/ObserverContextImpl.html" title="type parameter in ObserverContextImpl">E</a> extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a>></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="createAndPrepare-org.apache.hadoop.hbase.CoprocessorEnvironment-"> |
| <!-- --> |
| </a><a name="createAndPrepare-E-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>createAndPrepare</h4> |
| <pre><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Deprecated.html?is-external=true" title="class or interface in java.lang">@Deprecated</a> |
| public static <E extends <a href="../../../../../org/apache/hadoop/hbase/CoprocessorEnvironment.html" title="interface in org.apache.hadoop.hbase">CoprocessorEnvironment</a>> <a href="../../../../../org/apache/hadoop/hbase/coprocessor/ObserverContext.html" title="interface in org.apache.hadoop.hbase.coprocessor">ObserverContext</a><E> <a href="../../../../../src-html/org/apache/hadoop/hbase/coprocessor/ObserverContextImpl.html#line.100">createAndPrepare</a>(E env)</pre> |
| <div class="block"><span class="deprecatedLabel">Deprecated.</span> </div> |
| <div class="block">Instantiates a new ObserverContext instance if the passed reference is <code>null</code> and |
| sets the environment in the new or existing instance. This allows deferring the instantiation |
| of a ObserverContext until it is actually needed.</div> |
| <dl> |
| <dt><span class="paramLabel">Type Parameters:</span></dt> |
| <dd><code>E</code> - The environment type for the context</dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>env</code> - The coprocessor environment to set</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>An instance of <code>ObserverContext</code> with the environment set</dd> |
| </dl> |
| </li> |
| </ul> |
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