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| <div class="subTitle">org.apache.hadoop.hbase.errorhandling</div> |
| <h2 title="Class ForeignExceptionDispatcher" class="title">Class ForeignExceptionDispatcher</h2> |
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| <dd><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionListener.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionListener</a>, <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionSnare</a></dd> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.41">ForeignExceptionDispatcher</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/errorhandling/ForeignExceptionListener.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionListener</a>, <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionSnare</a></pre> |
| <div class="block">The dispatcher acts as the state holding entity for foreign error handling. The first exception |
| received by the dispatcher get passed directly to the listeners. Subsequent exceptions are |
| dropped. |
| <p> |
| If there are multiple dispatchers that are all in the same foreign exception monitoring group, |
| ideally all these monitors are "peers" -- any error on one dispatcher should get propagated to |
| all others (via rpc, or some other mechanism). Due to racing error conditions the exact reason |
| for failure may be different on different peers, but the fact that they are in error state should |
| eventually hold on all. |
| <p> |
| This is thread-safe and must be because this is expected to be used to propagate exceptions from |
| foreign threads.</div> |
| </li> |
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| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#exception">exception</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionListener.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionListener</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#listeners">listeners</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/errorhandling/ForeignExceptionDispatcher.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
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| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#name">name</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#ForeignExceptionDispatcher--">ForeignExceptionDispatcher</a></span>()</code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#ForeignExceptionDispatcher-java.lang.String-">ForeignExceptionDispatcher</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> name)</code> </td> |
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| <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/errorhandling/ForeignExceptionDispatcher.html#addListener-org.apache.hadoop.hbase.errorhandling.ForeignExceptionListener-">addListener</a></span>(<a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionListener.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionListener</a> errorable)</code> |
| <div class="block">Listen for failures to a given process.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#dispatch-org.apache.hadoop.hbase.errorhandling.ForeignException-">dispatch</a></span>(<a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a> e)</code> |
| <div class="block">Sends an exception to all listeners.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#getException--">getException</a></span>()</code> |
| <div class="block">Get the value of the captured exception.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><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/errorhandling/ForeignExceptionDispatcher.html#getName--">getName</a></span>()</code> </td> |
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| <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/errorhandling/ForeignExceptionDispatcher.html#hasException--">hasException</a></span>()</code> |
| <div class="block">Non-exceptional form of <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#rethrowException--"><code>ForeignExceptionSnare.rethrowException()</code></a>.</div> |
| </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/errorhandling/ForeignExceptionDispatcher.html#receive-org.apache.hadoop.hbase.errorhandling.ForeignException-">receive</a></span>(<a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a> e)</code> |
| <div class="block">Receive a ForeignException.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#rethrowException--">rethrowException</a></span>()</code> |
| <div class="block">Rethrow an exception currently held by the <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html" title="interface in org.apache.hadoop.hbase.errorhandling"><code>ForeignExceptionSnare</code></a>.</div> |
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| <h4>LOG</h4> |
| <pre>private static final org.slf4j.Logger <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.42">LOG</a></pre> |
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| <h3>Constructor Detail</h3> |
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| <h4>ForeignExceptionDispatcher</h4> |
| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.47">ForeignExceptionDispatcher</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> name)</pre> |
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| <pre>public <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.51">ForeignExceptionDispatcher</a>()</pre> |
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| <h4>receive</h4> |
| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.60">receive</a>(<a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a> e)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionListener.html#receive-org.apache.hadoop.hbase.errorhandling.ForeignException-">ForeignExceptionListener</a></code></span></div> |
| <div class="block">Receive a ForeignException. |
| <p> |
| Implementers must ensure that this method is thread-safe.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionListener.html#receive-org.apache.hadoop.hbase.errorhandling.ForeignException-">receive</a></code> in interface <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionListener.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionListener</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>e</code> - exception causing the error. Implementations must accept and handle null here.</dd> |
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| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.77">rethrowException</a>() |
| throws <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#rethrowException--">ForeignExceptionSnare</a></code></span></div> |
| <div class="block">Rethrow an exception currently held by the <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html" title="interface in org.apache.hadoop.hbase.errorhandling"><code>ForeignExceptionSnare</code></a>. If there is no |
| exception this is a no-op all exceptions from remote sources are procedure exceptions</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#rethrowException--">rethrowException</a></code> in interface <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionSnare</a></code></dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a></code></dd> |
| </dl> |
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| <h4>hasException</h4> |
| <pre>public boolean <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.86">hasException</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#hasException--">ForeignExceptionSnare</a></code></span></div> |
| <div class="block">Non-exceptional form of <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#rethrowException--"><code>ForeignExceptionSnare.rethrowException()</code></a>. Checks to see if any process to which the |
| exception checkers is bound has created an error that would cause a failure.</div> |
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| <dd><code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#hasException--">hasException</a></code> in interface <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionSnare</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd><tt>true</tt> if there has been an error,<tt>false</tt> otherwise</dd> |
| </dl> |
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| </ul> |
| <a name="getException--"> |
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| <h4>getException</h4> |
| <pre>public <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a> <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.91">getException</a>()</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#getException--">ForeignExceptionSnare</a></code></span></div> |
| <div class="block">Get the value of the captured exception.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html#getException--">getException</a></code> in interface <code><a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionSnare</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the captured foreign exception or null if no exception captured.</dd> |
| </dl> |
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| <a name="dispatch-org.apache.hadoop.hbase.errorhandling.ForeignException-"> |
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| <h4>dispatch</h4> |
| <pre>private void <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.99">dispatch</a>(<a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling">ForeignException</a> e)</pre> |
| <div class="block">Sends an exception to all listeners.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>e</code> - <a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html" title="class in org.apache.hadoop.hbase.errorhandling"><code>ForeignException</code></a> containing the cause. Can be null.</dd> |
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| <pre>public void <a href="../../../../../src-html/org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html#line.111">addListener</a>(<a href="../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionListener.html" title="interface in org.apache.hadoop.hbase.errorhandling">ForeignExceptionListener</a> errorable)</pre> |
| <div class="block">Listen for failures to a given process. This method should only be used during initialization |
| and not added to after exceptions are accepted.</div> |
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| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>errorable</code> - listener for the errors. may be null.</dd> |
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