You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2017/04/06 20:01:20 UTC
[19/25] hbase-site git commit: Published site at
9109803891e256f8c047af72572f07695e604a3f.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/ddcd3ebf/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html
index df3c58d..94f6ab6 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/Procedure.html
@@ -224,9 +224,9 @@
<span class="sourceLineNo">216</span> }<a name="line.216"></a>
<span class="sourceLineNo">217</span><a name="line.217"></a>
<span class="sourceLineNo">218</span> /**<a name="line.218"></a>
-<span class="sourceLineNo">219</span> * By default, the executor will try ro run procedures start to finish.<a name="line.219"></a>
+<span class="sourceLineNo">219</span> * By default, the executor will try to run procedures start to finish.<a name="line.219"></a>
<span class="sourceLineNo">220</span> * Return true to make the executor yield between each execution step to<a name="line.220"></a>
-<span class="sourceLineNo">221</span> * give other procedures time to run their steps.<a name="line.221"></a>
+<span class="sourceLineNo">221</span> * give other procedures a chance to run.<a name="line.221"></a>
<span class="sourceLineNo">222</span> * @param env the environment passed to the ProcedureExecutor<a name="line.222"></a>
<span class="sourceLineNo">223</span> * @return Return true if the executor should yield on completion of an execution step.<a name="line.223"></a>
<span class="sourceLineNo">224</span> * Defaults to return false.<a name="line.224"></a>
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+<span class="sourceLineNo">274</span> sb.append(", exception=" + getException());<a name="line.274"></a>
<span class="sourceLineNo">275</span> }<a name="line.275"></a>
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<span class="sourceLineNo">277</span> sb.append(", ");<a name="line.277"></a>
@@ -514,290 +514,300 @@
<span class="sourceLineNo">506</span> // ==============================================================================================<a name="line.506"></a>
<span class="sourceLineNo">507</span><a name="line.507"></a>
<span class="sourceLineNo">508</span> /**<a name="line.508"></a>
-<span class="sourceLineNo">509</span> * @return true if the procedure is in a RUNNABLE state.<a name="line.509"></a>
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-<span class="sourceLineNo">511</span> protected synchronized boolean isRunnable() {<a name="line.511"></a>
-<span class="sourceLineNo">512</span> return state == ProcedureState.RUNNABLE;<a name="line.512"></a>
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-<span class="sourceLineNo">519</span> /**<a name="line.519"></a>
-<span class="sourceLineNo">520</span> * @return true if the procedure has failed.<a name="line.520"></a>
-<span class="sourceLineNo">521</span> * true may mean failed but not yet rolledback or failed and rolledback.<a name="line.521"></a>
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-<span class="sourceLineNo">524</span> return exception != null || state == ProcedureState.ROLLEDBACK;<a name="line.524"></a>
-<span class="sourceLineNo">525</span> }<a name="line.525"></a>
+<span class="sourceLineNo">509</span> * Procedure has states which are defined in proto file. At some places in the code, we<a name="line.509"></a>
+<span class="sourceLineNo">510</span> * need to determine more about those states. Following Methods help determine:<a name="line.510"></a>
+<span class="sourceLineNo">511</span> *<a name="line.511"></a>
+<span class="sourceLineNo">512</span> * {@link #isFailed()} - A procedure has executed at least once and has failed. The procedure<a name="line.512"></a>
+<span class="sourceLineNo">513</span> * may or may not have rolled back yet. Any procedure in FAILED state<a name="line.513"></a>
+<span class="sourceLineNo">514</span> * will be eventually moved to ROLLEDBACK state.<a name="line.514"></a>
+<span class="sourceLineNo">515</span> *<a name="line.515"></a>
+<span class="sourceLineNo">516</span> * {@link #isSuccess()} - A procedure is completed successfully without any exception.<a name="line.516"></a>
+<span class="sourceLineNo">517</span> *<a name="line.517"></a>
+<span class="sourceLineNo">518</span> * {@link #isFinished()} - As a procedure in FAILED state will be tried forever for rollback, only<a name="line.518"></a>
+<span class="sourceLineNo">519</span> * condition when scheduler/ executor will drop procedure from further<a name="line.519"></a>
+<span class="sourceLineNo">520</span> * processing is when procedure state is ROLLEDBACK or isSuccess()<a name="line.520"></a>
+<span class="sourceLineNo">521</span> * returns true. This is a terminal state of the procedure.<a name="line.521"></a>
+<span class="sourceLineNo">522</span> *<a name="line.522"></a>
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+<span class="sourceLineNo">530</span> protected synchronized boolean isRunnable() {<a name="line.530"></a>
+<span class="sourceLineNo">531</span> return state == ProcedureState.RUNNABLE;<a name="line.531"></a>
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-<span class="sourceLineNo">575</span><a name="line.575"></a>
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-<span class="sourceLineNo">577</span> setFailure(new RemoteProcedureException(source, cause));<a name="line.577"></a>
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-<span class="sourceLineNo">585</span> }<a name="line.585"></a>
-<span class="sourceLineNo">586</span><a name="line.586"></a>
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-<span class="sourceLineNo">588</span> setFailure(source, new ProcedureAbortedException(msg));<a name="line.588"></a>
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-<span class="sourceLineNo">590</span><a name="line.590"></a>
-<span class="sourceLineNo">591</span> /**<a name="line.591"></a>
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-<span class="sourceLineNo">593</span> * @return true to let the framework handle the timeout as abort,<a name="line.593"></a>
-<span class="sourceLineNo">594</span> * false in case the procedure handled the timeout itself.<a name="line.594"></a>
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-<span class="sourceLineNo">598</span> long timeDiff = EnvironmentEdgeManager.currentTime() - lastUpdate;<a name="line.598"></a>
-<span class="sourceLineNo">599</span> setFailure("ProcedureExecutor", new TimeoutIOException(<a name="line.599"></a>
-<span class="sourceLineNo">600</span> "Operation timed out after " + StringUtils.humanTimeDiff(timeDiff)));<a name="line.600"></a>
-<span class="sourceLineNo">601</span> return true;<a name="line.601"></a>
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+<span class="sourceLineNo">590</span> protected synchronized void setFailure(final RemoteProcedureException exception) {<a name="line.590"></a>
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+<span class="sourceLineNo">592</span> if (!isFinished()) {<a name="line.592"></a>
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+<span class="sourceLineNo">601</span> /**<a name="line.601"></a>
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+<span class="sourceLineNo">603</span> * @return true to let the framework handle the timeout as abort,<a name="line.603"></a>
+<span class="sourceLineNo">604</span> * false in case the procedure handled the timeout itself.<a name="line.604"></a>
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