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From git-site-r...@apache.org
Subject [19/25] hbase-site git commit: Published site at 9109803891e256f8c047af72572f07695e604a3f.
Date Thu, 06 Apr 2017 20:01:20 GMT
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>
@@ -279,7 +279,7 @@
 <span class="sourceLineNo">271</span>    toStringState(sb);<a name="line.271"></a>
 <span class="sourceLineNo">272</span><a name="line.272"></a>
 <span class="sourceLineNo">273</span>    if (hasException()) {<a name="line.273"></a>
-<span class="sourceLineNo">274</span>      sb.append(", failed=" + getException());<a name="line.274"></a>
+<span class="sourceLineNo">274</span>      sb.append(", exception=" + getException());<a name="line.274"></a>
 <span class="sourceLineNo">275</span>    }<a name="line.275"></a>
 <span class="sourceLineNo">276</span><a name="line.276"></a>
 <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>
-<span class="sourceLineNo">510</span>   */<a name="line.510"></a>
-<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>
-<span class="sourceLineNo">513</span>  }<a name="line.513"></a>
-<span class="sourceLineNo">514</span><a name="line.514"></a>
-<span class="sourceLineNo">515</span>  public synchronized boolean isInitializing() {<a name="line.515"></a>
-<span class="sourceLineNo">516</span>    return state == ProcedureState.INITIALIZING;<a name="line.516"></a>
-<span class="sourceLineNo">517</span>  }<a name="line.517"></a>
-<span class="sourceLineNo">518</span><a name="line.518"></a>
-<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>
-<span class="sourceLineNo">522</span>   */<a name="line.522"></a>
-<span class="sourceLineNo">523</span>  public synchronized boolean isFailed() {<a name="line.523"></a>
-<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>
+<span class="sourceLineNo">523</span>   * {@link #isWaiting()} - Procedure is in one of the two waiting states ({@link<a name="line.523"></a>
+<span class="sourceLineNo">524</span>   *                        ProcedureState#WAITING}, {@link ProcedureState#WAITING_TIMEOUT}).<a name="line.524"></a>
+<span class="sourceLineNo">525</span>   */<a name="line.525"></a>
 <span class="sourceLineNo">526</span><a name="line.526"></a>
 <span class="sourceLineNo">527</span>  /**<a name="line.527"></a>
-<span class="sourceLineNo">528</span>   * @return true if the procedure is finished successfully.<a name="line.528"></a>
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 <span class="sourceLineNo">529</span>   */<a name="line.529"></a>
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+<span class="sourceLineNo">530</span>  protected synchronized boolean isRunnable() {<a name="line.530"></a>
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-<span class="sourceLineNo">537</span>   */<a name="line.537"></a>
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-<span class="sourceLineNo">550</span>  /**<a name="line.550"></a>
-<span class="sourceLineNo">551</span>   * @return true if the procedure is waiting for a child to finish or for an external event.<a name="line.551"></a>
-<span class="sourceLineNo">552</span>   */<a name="line.552"></a>
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-<span class="sourceLineNo">564</span>  @VisibleForTesting<a name="line.564"></a>
-<span class="sourceLineNo">565</span>  @InterfaceAudience.Private<a name="line.565"></a>
-<span class="sourceLineNo">566</span>  protected synchronized void setState(final ProcedureState state) {<a name="line.566"></a>
-<span class="sourceLineNo">567</span>    this.state = state;<a name="line.567"></a>
-<span class="sourceLineNo">568</span>    updateTimestamp();<a name="line.568"></a>
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-<span class="sourceLineNo">570</span><a name="line.570"></a>
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-<span class="sourceLineNo">576</span>  protected void setFailure(final String source, final Throwable cause) {<a name="line.576"></a>
-<span class="sourceLineNo">577</span>    setFailure(new RemoteProcedureException(source, cause));<a name="line.577"></a>
-<span class="sourceLineNo">578</span>  }<a name="line.578"></a>
-<span class="sourceLineNo">579</span><a name="line.579"></a>
-<span class="sourceLineNo">580</span>  protected synchronized void setFailure(final RemoteProcedureException exception) {<a name="line.580"></a>
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-<span class="sourceLineNo">582</span>    if (!isFinished()) {<a name="line.582"></a>
-<span class="sourceLineNo">583</span>      setState(ProcedureState.FINISHED);<a name="line.583"></a>
-<span class="sourceLineNo">584</span>    }<a name="line.584"></a>
-<span class="sourceLineNo">585</span>  }<a name="line.585"></a>
-<span class="sourceLineNo">586</span><a name="line.586"></a>
-<span class="sourceLineNo">587</span>  protected void setAbortFailure(final String source, final String msg) {<a name="line.587"></a>
-<span class="sourceLineNo">588</span>    setFailure(source, new ProcedureAbortedException(msg));<a name="line.588"></a>
-<span class="sourceLineNo">589</span>  }<a name="line.589"></a>
-<span class="sourceLineNo">590</span><a name="line.590"></a>
-<span class="sourceLineNo">591</span>  /**<a name="line.591"></a>
-<span class="sourceLineNo">592</span>   * Called by the ProcedureExecutor when the timeout set by setTimeout() is expired.<a name="line.592"></a>
-<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>
-<span class="sourceLineNo">595</span>   */<a name="line.595"></a>
-<span class="sourceLineNo">596</span>  protected synchronized boolean setTimeoutFailure(final TEnvironment env) {<a name="line.596"></a>
-<span class="sourceLineNo">597</span>    if (state == ProcedureState.WAITING_TIMEOUT) {<a name="line.597"></a>
-<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">603</span>    return false;<a name="line.603"></a>
-<span class="sourceLineNo">604</span>  }<a name="line.604"></a>
-<span class="sourceLineNo">605</span><a name="line.605"></a>
-<span class="sourceLineNo">606</span>  public synchronized boolean hasException() {<a name="line.606"></a>
-<span class="sourceLineNo">607</span>    return exception != null;<a name="line.607"></a>
-<span class="sourceLineNo">608</span>  }<a name="line.608"></a>
-<span class="sourceLineNo">609</span><a name="line.609"></a>
-<span class="sourceLineNo">610</span>  public synchronized RemoteProcedureException getException() {<a name="line.610"></a>
-<span class="sourceLineNo">611</span>    return exception;<a name="line.611"></a>
-<span class="sourceLineNo">612</span>  }<a name="line.612"></a>
-<span class="sourceLineNo">613</span><a name="line.613"></a>
-<span class="sourceLineNo">614</span>  /**<a name="line.614"></a>
-<span class="sourceLineNo">615</span>   * Called by the ProcedureExecutor on procedure-load to restore the latch state<a name="line.615"></a>
-<span class="sourceLineNo">616</span>   */<a name="line.616"></a>
-<span class="sourceLineNo">617</span>  @InterfaceAudience.Private<a name="line.617"></a>
-<span class="sourceLineNo">618</span>  protected synchronized void setChildrenLatch(final int numChildren) {<a name="line.618"></a>
-<span class="sourceLineNo">619</span>    this.childrenLatch = numChildren;<a name="line.619"></a>
-<span class="sourceLineNo">620</span>  }<a name="line.620"></a>
-<span class="sourceLineNo">621</span><a name="line.621"></a>
-<span class="sourceLineNo">622</span>  /**<a name="line.622"></a>
-<span class="sourceLineNo">623</span>   * Called by the ProcedureExecutor on procedure-load to restore the latch state<a name="line.623"></a>
-<span class="sourceLineNo">624</span>   */<a name="line.624"></a>
-<span class="sourceLineNo">625</span>  @InterfaceAudience.Private<a name="line.625"></a>
-<span class="sourceLineNo">626</span>  protected synchronized void incChildrenLatch() {<a name="line.626"></a>
-<span class="sourceLineNo">627</span>    // TODO: can this be inferred from the stack? I think so...<a name="line.627"></a>
-<span class="sourceLineNo">628</span>    this.childrenLatch++;<a name="line.628"></a>
-<span class="sourceLineNo">629</span>  }<a name="line.629"></a>
-<span class="sourceLineNo">630</span><a name="line.630"></a>
-<span class="sourceLineNo">631</span>  /**<a name="line.631"></a>
-<span class="sourceLineNo">632</span>   * Called by the ProcedureExecutor to notify that one of the sub-procedures has completed.<a name="line.632"></a>
-<span class="sourceLineNo">633</span>   */<a name="line.633"></a>
-<span class="sourceLineNo">634</span>  @InterfaceAudience.Private<a name="line.634"></a>
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-<span class="sourceLineNo">636</span>    assert childrenLatch &gt; 0: this;<a name="line.636"></a>
-<span class="sourceLineNo">637</span>    return --childrenLatch == 0;<a name="line.637"></a>
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-<span class="sourceLineNo">647</span>    return childrenLatch;<a name="line.647"></a>
+<span class="sourceLineNo">534</span>  public synchronized boolean isInitializing() {<a name="line.534"></a>
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+<span class="sourceLineNo">536</span>  }<a name="line.536"></a>
+<span class="sourceLineNo">537</span><a name="line.537"></a>
+<span class="sourceLineNo">538</span>  /**<a name="line.538"></a>
+<span class="sourceLineNo">539</span>   * @return true if the procedure has failed. It may or may not have rolled back.<a name="line.539"></a>
+<span class="sourceLineNo">540</span>   */<a name="line.540"></a>
+<span class="sourceLineNo">541</span>  public synchronized boolean isFailed() {<a name="line.541"></a>
+<span class="sourceLineNo">542</span>    return state == ProcedureState.FAILED || state == ProcedureState.ROLLEDBACK;<a name="line.542"></a>
+<span class="sourceLineNo">543</span>  }<a name="line.543"></a>
+<span class="sourceLineNo">544</span><a name="line.544"></a>
+<span class="sourceLineNo">545</span>  /**<a name="line.545"></a>
+<span class="sourceLineNo">546</span>   * @return true if the procedure is finished successfully.<a name="line.546"></a>
+<span class="sourceLineNo">547</span>   */<a name="line.547"></a>
+<span class="sourceLineNo">548</span>  public synchronized boolean isSuccess() {<a name="line.548"></a>
+<span class="sourceLineNo">549</span>    return state == ProcedureState.SUCCESS &amp;&amp; !hasException();<a name="line.549"></a>
+<span class="sourceLineNo">550</span>  }<a name="line.550"></a>
+<span class="sourceLineNo">551</span><a name="line.551"></a>
+<span class="sourceLineNo">552</span>  /**<a name="line.552"></a>
+<span class="sourceLineNo">553</span>   * @return true if the procedure is finished. The Procedure may be completed successfully or<a name="line.553"></a>
+<span class="sourceLineNo">554</span>   * rolledback.<a name="line.554"></a>
+<span class="sourceLineNo">555</span>   */<a name="line.555"></a>
+<span class="sourceLineNo">556</span>  public synchronized boolean isFinished() {<a name="line.556"></a>
+<span class="sourceLineNo">557</span>    return isSuccess() || state == ProcedureState.ROLLEDBACK;<a name="line.557"></a>
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+<span class="sourceLineNo">559</span><a name="line.559"></a>
+<span class="sourceLineNo">560</span>  /**<a name="line.560"></a>
+<span class="sourceLineNo">561</span>   * @return true if the procedure is waiting for a child to finish or for an external event.<a name="line.561"></a>
+<span class="sourceLineNo">562</span>   */<a name="line.562"></a>
+<span class="sourceLineNo">563</span>  public synchronized boolean isWaiting() {<a name="line.563"></a>
+<span class="sourceLineNo">564</span>    switch (state) {<a name="line.564"></a>
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+<span class="sourceLineNo">574</span>  @VisibleForTesting<a name="line.574"></a>
+<span class="sourceLineNo">575</span>  @InterfaceAudience.Private<a name="line.575"></a>
+<span class="sourceLineNo">576</span>  protected synchronized void setState(final ProcedureState state) {<a name="line.576"></a>
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+<span class="sourceLineNo">578</span>    updateTimestamp();<a name="line.578"></a>
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+<span class="sourceLineNo">583</span>    return state;<a name="line.583"></a>
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+<span class="sourceLineNo">587</span>    setFailure(new RemoteProcedureException(source, cause));<a name="line.587"></a>
+<span class="sourceLineNo">588</span>  }<a name="line.588"></a>
+<span class="sourceLineNo">589</span><a name="line.589"></a>
+<span class="sourceLineNo">590</span>  protected synchronized void setFailure(final RemoteProcedureException exception) {<a name="line.590"></a>
+<span class="sourceLineNo">591</span>    this.exception = exception;<a name="line.591"></a>
+<span class="sourceLineNo">592</span>    if (!isFinished()) {<a name="line.592"></a>
+<span class="sourceLineNo">593</span>      setState(ProcedureState.FAILED);<a name="line.593"></a>
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+<span class="sourceLineNo">595</span>  }<a name="line.595"></a>
+<span class="sourceLineNo">596</span><a name="line.596"></a>
+<span class="sourceLineNo">597</span>  protected void setAbortFailure(final String source, final String msg) {<a name="line.597"></a>
+<span class="sourceLineNo">598</span>    setFailure(source, new ProcedureAbortedException(msg));<a name="line.598"></a>
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+<span class="sourceLineNo">715</span>  @InterfaceAudience.Private<a name="line.715"></a>
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+<span class="sourceLineNo">729</span>  @InterfaceAudience.Private<a name="line.729"></a>
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+<span class="sourceLineNo">739</span><a name="line.739"></a>
+<span class="sourceLineNo">740</span>  /**<a name="line.740"></a>
+<span class="sourceLineNo">741</span>   * Internal method called by the ProcedureExecutor that starts the user-level code acquireLock().<a name="line.741"></a>
+<span class="sourceLineNo">742</span>   */<a name="line.742"></a>
+<span class="sourceLineNo">743</span>  @InterfaceAudience.Private<a name="line.743"></a>
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+<span class="sourceLineNo">747</span><a name="line.747"></a>
+<span class="sourceLineNo">748</span>  /**<a name="line.748"></a>
+<span class="sourceLineNo">749</span>   * Internal method called by the ProcedureExecutor that starts the user-level code releaseLock().<a name="line.749"></a>
+<span class="sourceLineNo">750</span>   */<a name="line.750"></a>
+<span class="sourceLineNo">751</span>  @InterfaceAudience.Private<a name="line.751"></a>
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+<span class="sourceLineNo">754</span>  }<a name="line.754"></a>
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+<span class="sourceLineNo">756</span>  @Override<a name="line.756"></a>
+<span class="sourceLineNo">757</span>  public int compareTo(final Procedure other) {<a name="line.757"></a>
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+<span class="sourceLineNo">760</span><a name="line.760"></a>
+<span class="sourceLineNo">761</span>  // ==========================================================================<a name="line.761"></a>
+<span class="sourceLineNo">762</span>  //  misc utils<a name="line.762"></a>
+<span class="sourceLineNo">763</span>  // ==========================================================================<a name="line.763"></a>
+<span class="sourceLineNo">764</span><a name="line.764"></a>
+<span class="sourceLineNo">765</span>  /**<a name="line.765"></a>
+<span class="sourceLineNo">766</span>   * Get an hashcode for the specified Procedure ID<a name="line.766"></a>
+<span class="sourceLineNo">767</span>   * @return the hashcode for the specified procId<a name="line.767"></a>
+<span class="sourceLineNo">768</span>   */<a name="line.768"></a>
+<span class="sourceLineNo">769</span>  public static long getProcIdHashCode(final long procId) {<a name="line.769"></a>
+<span class="sourceLineNo">770</span>    long h = procId;<a name="line.770"></a>
+<span class="sourceLineNo">771</span>    h ^= h &gt;&gt; 16;<a name="line.771"></a>
+<span class="sourceLineNo">772</span>    h *= 0x85ebca6b;<a name="line.772"></a>
+<span class="sourceLineNo">773</span>    h ^= h &gt;&gt; 13;<a name="line.773"></a>
+<span class="sourceLineNo">774</span>    h *= 0xc2b2ae35;<a name="line.774"></a>
+<span class="sourceLineNo">775</span>    h ^= h &gt;&gt; 16;<a name="line.775"></a>
+<span class="sourceLineNo">776</span>    return h;<a name="line.776"></a>
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+<span class="sourceLineNo">778</span><a name="line.778"></a>
+<span class="sourceLineNo">779</span>  /*<a name="line.779"></a>
+<span class="sourceLineNo">780</span>   * Helper to lookup the root Procedure ID given a specified procedure.<a name="line.780"></a>
+<span class="sourceLineNo">781</span>   */<a name="line.781"></a>
+<span class="sourceLineNo">782</span>  @InterfaceAudience.Private<a name="line.782"></a>
+<span class="sourceLineNo">783</span>  protected static Long getRootProcedureId(final Map&lt;Long, Procedure&gt; procedures, Procedure proc) {<a name="line.783"></a>
+<span class="sourceLineNo">784</span>    while (proc.hasParent()) {<a name="line.784"></a>
+<span class="sourceLineNo">785</span>      proc = procedures.get(proc.getParentProcId());<a name="line.785"></a>
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+<span class="sourceLineNo">788</span>    return proc.getProcId();<a name="line.788"></a>
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+<span class="sourceLineNo">790</span><a name="line.790"></a>
+<span class="sourceLineNo">791</span>  /**<a name="line.791"></a>
+<span class="sourceLineNo">792</span>   * @param a the first procedure to be compared.<a name="line.792"></a>
+<span class="sourceLineNo">793</span>   * @param b the second procedure to be compared.<a name="line.793"></a>
+<span class="sourceLineNo">794</span>   * @return true if the two procedures have the same parent<a name="line.794"></a>
+<span class="sourceLineNo">795</span>   */<a name="line.795"></a>
+<span class="sourceLineNo">796</span>  public static boolean haveSameParent(final Procedure a, final Procedure b) {<a name="line.796"></a>
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+<span class="sourceLineNo">798</span>      return a.getParentProcId() == b.getParentProcId();<a name="line.798"></a>
+<span class="sourceLineNo">799</span>    }<a name="line.799"></a>
+<span class="sourceLineNo">800</span>    return false;<a name="line.800"></a>
+<span class="sourceLineNo">801</span>  }<a name="line.801"></a>
+<span class="sourceLineNo">802</span>}<a name="line.802"></a>
 
 
 


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