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From git-site-r...@apache.org
Subject [31/51] [partial] hbase-site git commit: Published site at .
Date Fri, 10 Nov 2017 15:30:18 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a108018f/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.ExampleRegionObserver.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.ExampleRegionObserver.html b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.ExampleRegionObserver.html
index 7a70a5b..a7535b9 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.ExampleRegionObserver.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.ExampleRegionObserver.html
@@ -43,99 +43,141 @@
 <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.metrics.Counter;<a name="line.35"></a>
 <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.metrics.MetricRegistry;<a name="line.36"></a>
 <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.metrics.Timer;<a name="line.37"></a>
-<span class="sourceLineNo">038</span><a name="line.38"></a>
-<span class="sourceLineNo">039</span>/**<a name="line.39"></a>
-<span class="sourceLineNo">040</span> * An example coprocessor that collects some metrics to demonstrate the usage of exporting custom<a name="line.40"></a>
-<span class="sourceLineNo">041</span> * metrics from the coprocessor.<a name="line.41"></a>
-<span class="sourceLineNo">042</span> * &lt;p&gt;<a name="line.42"></a>
-<span class="sourceLineNo">043</span> * These metrics will be available through the regular Hadoop metrics2 sinks (ganglia, opentsdb,<a name="line.43"></a>
-<span class="sourceLineNo">044</span> * etc) as well as JMX output. You can view a snapshot of the metrics by going to the http web UI<a name="line.44"></a>
-<span class="sourceLineNo">045</span> * of the regionserver page, something like http://myregionserverhost:16030/jmx<a name="line.45"></a>
-<span class="sourceLineNo">046</span> * &lt;/p&gt;<a name="line.46"></a>
-<span class="sourceLineNo">047</span> *<a name="line.47"></a>
-<span class="sourceLineNo">048</span> * @see ExampleMasterObserverWithMetrics<a name="line.48"></a>
-<span class="sourceLineNo">049</span> */<a name="line.49"></a>
-<span class="sourceLineNo">050</span>public class ExampleRegionObserverWithMetrics implements RegionCoprocessor {<a name="line.50"></a>
-<span class="sourceLineNo">051</span><a name="line.51"></a>
-<span class="sourceLineNo">052</span>  private Counter preGetCounter;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>  private Timer costlyOperationTimer;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>  private ExampleRegionObserver observer;<a name="line.54"></a>
-<span class="sourceLineNo">055</span><a name="line.55"></a>
-<span class="sourceLineNo">056</span>  class ExampleRegionObserver implements RegionCoprocessor, RegionObserver {<a name="line.56"></a>
-<span class="sourceLineNo">057</span>    @Override<a name="line.57"></a>
-<span class="sourceLineNo">058</span>    public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.58"></a>
-<span class="sourceLineNo">059</span>      return Optional.of(this);<a name="line.59"></a>
-<span class="sourceLineNo">060</span>    }<a name="line.60"></a>
-<span class="sourceLineNo">061</span><a name="line.61"></a>
-<span class="sourceLineNo">062</span>    @Override<a name="line.62"></a>
-<span class="sourceLineNo">063</span>    public void preGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, Get get,<a name="line.63"></a>
-<span class="sourceLineNo">064</span>        List&lt;Cell&gt; results) throws IOException {<a name="line.64"></a>
-<span class="sourceLineNo">065</span>      // Increment the Counter whenever the coprocessor is called<a name="line.65"></a>
-<span class="sourceLineNo">066</span>      preGetCounter.increment();<a name="line.66"></a>
+<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.regionserver.Store;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.regionserver.StoreFile;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest;<a name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>/**<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * An example coprocessor that collects some metrics to demonstrate the usage of exporting custom<a name="line.45"></a>
+<span class="sourceLineNo">046</span> * metrics from the coprocessor.<a name="line.46"></a>
+<span class="sourceLineNo">047</span> * &lt;p&gt;<a name="line.47"></a>
+<span class="sourceLineNo">048</span> * These metrics will be available through the regular Hadoop metrics2 sinks (ganglia, opentsdb,<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * etc) as well as JMX output. You can view a snapshot of the metrics by going to the http web UI<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * of the regionserver page, something like http://myregionserverhost:16030/jmx<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * &lt;/p&gt;<a name="line.51"></a>
+<span class="sourceLineNo">052</span> *<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * @see ExampleMasterObserverWithMetrics<a name="line.53"></a>
+<span class="sourceLineNo">054</span> */<a name="line.54"></a>
+<span class="sourceLineNo">055</span>public class ExampleRegionObserverWithMetrics implements RegionCoprocessor {<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  private Counter preGetCounter;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>  private Counter flushCounter;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>  private Counter filesCompactedCounter;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>  private Timer costlyOperationTimer;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>  private ExampleRegionObserver observer;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  class ExampleRegionObserver implements RegionCoprocessor, RegionObserver {<a name="line.63"></a>
+<span class="sourceLineNo">064</span>    @Override<a name="line.64"></a>
+<span class="sourceLineNo">065</span>    public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.65"></a>
+<span class="sourceLineNo">066</span>      return Optional.of(this);<a name="line.66"></a>
 <span class="sourceLineNo">067</span>    }<a name="line.67"></a>
 <span class="sourceLineNo">068</span><a name="line.68"></a>
 <span class="sourceLineNo">069</span>    @Override<a name="line.69"></a>
-<span class="sourceLineNo">070</span>    public void postGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, Get get,<a name="line.70"></a>
+<span class="sourceLineNo">070</span>    public void preGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, Get get,<a name="line.70"></a>
 <span class="sourceLineNo">071</span>        List&lt;Cell&gt; results) throws IOException {<a name="line.71"></a>
-<span class="sourceLineNo">072</span>      // do a costly (high latency) operation which we want to measure how long it takes by<a name="line.72"></a>
-<span class="sourceLineNo">073</span>      // using a Timer (which is a Meter and a Histogram).<a name="line.73"></a>
-<span class="sourceLineNo">074</span>      long start = System.nanoTime();<a name="line.74"></a>
-<span class="sourceLineNo">075</span>      try {<a name="line.75"></a>
-<span class="sourceLineNo">076</span>        performCostlyOperation();<a name="line.76"></a>
-<span class="sourceLineNo">077</span>      } finally {<a name="line.77"></a>
-<span class="sourceLineNo">078</span>        costlyOperationTimer.updateNanos(System.nanoTime() - start);<a name="line.78"></a>
-<span class="sourceLineNo">079</span>      }<a name="line.79"></a>
-<span class="sourceLineNo">080</span>    }<a name="line.80"></a>
-<span class="sourceLineNo">081</span><a name="line.81"></a>
-<span class="sourceLineNo">082</span>    private void performCostlyOperation() {<a name="line.82"></a>
-<span class="sourceLineNo">083</span>      try {<a name="line.83"></a>
-<span class="sourceLineNo">084</span>        // simulate the operation by sleeping.<a name="line.84"></a>
-<span class="sourceLineNo">085</span>        Thread.sleep(ThreadLocalRandom.current().nextLong(100));<a name="line.85"></a>
-<span class="sourceLineNo">086</span>      } catch (InterruptedException ignore) {<a name="line.86"></a>
-<span class="sourceLineNo">087</span>      }<a name="line.87"></a>
-<span class="sourceLineNo">088</span>    }<a name="line.88"></a>
-<span class="sourceLineNo">089</span>  }<a name="line.89"></a>
-<span class="sourceLineNo">090</span><a name="line.90"></a>
-<span class="sourceLineNo">091</span>  @Override public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.91"></a>
-<span class="sourceLineNo">092</span>    return Optional.of(observer);<a name="line.92"></a>
-<span class="sourceLineNo">093</span>  }<a name="line.93"></a>
-<span class="sourceLineNo">094</span><a name="line.94"></a>
-<span class="sourceLineNo">095</span>  @Override<a name="line.95"></a>
-<span class="sourceLineNo">096</span>  public void start(CoprocessorEnvironment env) throws IOException {<a name="line.96"></a>
-<span class="sourceLineNo">097</span>    // start for the RegionServerObserver will be called only once in the lifetime of the<a name="line.97"></a>
-<span class="sourceLineNo">098</span>    // server. We will construct and register all metrics that we will track across method<a name="line.98"></a>
-<span class="sourceLineNo">099</span>    // invocations.<a name="line.99"></a>
-<span class="sourceLineNo">100</span><a name="line.100"></a>
-<span class="sourceLineNo">101</span>    if (env instanceof RegionCoprocessorEnvironment) {<a name="line.101"></a>
-<span class="sourceLineNo">102</span>      // Obtain the MetricRegistry for the RegionServer. Metrics from this registry will be reported<a name="line.102"></a>
-<span class="sourceLineNo">103</span>      // at the region server level per-regionserver.<a name="line.103"></a>
-<span class="sourceLineNo">104</span>      MetricRegistry registry =<a name="line.104"></a>
-<span class="sourceLineNo">105</span>          ((RegionCoprocessorEnvironment) env).getMetricRegistryForRegionServer();<a name="line.105"></a>
-<span class="sourceLineNo">106</span>      observer = new ExampleRegionObserver();<a name="line.106"></a>
-<span class="sourceLineNo">107</span><a name="line.107"></a>
-<span class="sourceLineNo">108</span>      if (preGetCounter == null) {<a name="line.108"></a>
-<span class="sourceLineNo">109</span>        // Create a new Counter, or get the already registered counter.<a name="line.109"></a>
-<span class="sourceLineNo">110</span>        // It is much better to only call this once and save the Counter as a class field instead<a name="line.110"></a>
-<span class="sourceLineNo">111</span>        // of creating the counter every time a coprocessor method is invoked. This will negate<a name="line.111"></a>
-<span class="sourceLineNo">112</span>        // any performance bottleneck coming from map lookups tracking metrics in the registry.<a name="line.112"></a>
-<span class="sourceLineNo">113</span>        // Returned counter instance is shared by all coprocessors of the same class in the same<a name="line.113"></a>
-<span class="sourceLineNo">114</span>        // region server.<a name="line.114"></a>
-<span class="sourceLineNo">115</span>        preGetCounter = registry.counter("preGetRequests");<a name="line.115"></a>
-<span class="sourceLineNo">116</span>      }<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span>      if (costlyOperationTimer == null) {<a name="line.118"></a>
-<span class="sourceLineNo">119</span>        // Create a Timer to track execution times for the costly operation.<a name="line.119"></a>
-<span class="sourceLineNo">120</span>        costlyOperationTimer = registry.timer("costlyOperation");<a name="line.120"></a>
-<span class="sourceLineNo">121</span>      }<a name="line.121"></a>
-<span class="sourceLineNo">122</span>    }<a name="line.122"></a>
-<span class="sourceLineNo">123</span>  }<a name="line.123"></a>
-<span class="sourceLineNo">124</span><a name="line.124"></a>
-<span class="sourceLineNo">125</span>  @Override<a name="line.125"></a>
-<span class="sourceLineNo">126</span>  public void stop(CoprocessorEnvironment e) throws IOException {<a name="line.126"></a>
-<span class="sourceLineNo">127</span>    // we should NOT remove / deregister the metrics in stop(). The whole registry will be<a name="line.127"></a>
-<span class="sourceLineNo">128</span>    // removed when the last region of the table is closed.<a name="line.128"></a>
-<span class="sourceLineNo">129</span>  }<a name="line.129"></a>
-<span class="sourceLineNo">130</span>}<a name="line.130"></a>
+<span class="sourceLineNo">072</span>      // Increment the Counter whenever the coprocessor is called<a name="line.72"></a>
+<span class="sourceLineNo">073</span>      preGetCounter.increment();<a name="line.73"></a>
+<span class="sourceLineNo">074</span>    }<a name="line.74"></a>
+<span class="sourceLineNo">075</span><a name="line.75"></a>
+<span class="sourceLineNo">076</span>    @Override<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    public void postGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, Get get,<a name="line.77"></a>
+<span class="sourceLineNo">078</span>        List&lt;Cell&gt; results) throws IOException {<a name="line.78"></a>
+<span class="sourceLineNo">079</span>      // do a costly (high latency) operation which we want to measure how long it takes by<a name="line.79"></a>
+<span class="sourceLineNo">080</span>      // using a Timer (which is a Meter and a Histogram).<a name="line.80"></a>
+<span class="sourceLineNo">081</span>      long start = System.nanoTime();<a name="line.81"></a>
+<span class="sourceLineNo">082</span>      try {<a name="line.82"></a>
+<span class="sourceLineNo">083</span>        performCostlyOperation();<a name="line.83"></a>
+<span class="sourceLineNo">084</span>      } finally {<a name="line.84"></a>
+<span class="sourceLineNo">085</span>        costlyOperationTimer.updateNanos(System.nanoTime() - start);<a name="line.85"></a>
+<span class="sourceLineNo">086</span>      }<a name="line.86"></a>
+<span class="sourceLineNo">087</span>    }<a name="line.87"></a>
+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span>    @Override<a name="line.89"></a>
+<span class="sourceLineNo">090</span>    public void postFlush(<a name="line.90"></a>
+<span class="sourceLineNo">091</span>        ObserverContext&lt;RegionCoprocessorEnvironment&gt; c,<a name="line.91"></a>
+<span class="sourceLineNo">092</span>        FlushLifeCycleTracker tracker) throws IOException {<a name="line.92"></a>
+<span class="sourceLineNo">093</span>      flushCounter.increment();<a name="line.93"></a>
+<span class="sourceLineNo">094</span>    }<a name="line.94"></a>
+<span class="sourceLineNo">095</span><a name="line.95"></a>
+<span class="sourceLineNo">096</span>    @Override<a name="line.96"></a>
+<span class="sourceLineNo">097</span>    public void postFlush(<a name="line.97"></a>
+<span class="sourceLineNo">098</span>        ObserverContext&lt;RegionCoprocessorEnvironment&gt; c, Store store, StoreFile resultFile,<a name="line.98"></a>
+<span class="sourceLineNo">099</span>        FlushLifeCycleTracker tracker) throws IOException {<a name="line.99"></a>
+<span class="sourceLineNo">100</span>      flushCounter.increment();<a name="line.100"></a>
+<span class="sourceLineNo">101</span>    }<a name="line.101"></a>
+<span class="sourceLineNo">102</span><a name="line.102"></a>
+<span class="sourceLineNo">103</span>    @Override<a name="line.103"></a>
+<span class="sourceLineNo">104</span>    public void postCompactSelection(<a name="line.104"></a>
+<span class="sourceLineNo">105</span>        ObserverContext&lt;RegionCoprocessorEnvironment&gt; c, Store store,<a name="line.105"></a>
+<span class="sourceLineNo">106</span>        List&lt;? extends StoreFile&gt; selected, CompactionLifeCycleTracker tracker,<a name="line.106"></a>
+<span class="sourceLineNo">107</span>        CompactionRequest request) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span>      if (selected != null) {<a name="line.108"></a>
+<span class="sourceLineNo">109</span>        filesCompactedCounter.increment(selected.size());<a name="line.109"></a>
+<span class="sourceLineNo">110</span>      }<a name="line.110"></a>
+<span class="sourceLineNo">111</span>    }<a name="line.111"></a>
+<span class="sourceLineNo">112</span><a name="line.112"></a>
+<span class="sourceLineNo">113</span>    private void performCostlyOperation() {<a name="line.113"></a>
+<span class="sourceLineNo">114</span>      try {<a name="line.114"></a>
+<span class="sourceLineNo">115</span>        // simulate the operation by sleeping.<a name="line.115"></a>
+<span class="sourceLineNo">116</span>        Thread.sleep(ThreadLocalRandom.current().nextLong(100));<a name="line.116"></a>
+<span class="sourceLineNo">117</span>      } catch (InterruptedException ignore) {<a name="line.117"></a>
+<span class="sourceLineNo">118</span>      }<a name="line.118"></a>
+<span class="sourceLineNo">119</span>    }<a name="line.119"></a>
+<span class="sourceLineNo">120</span>  }<a name="line.120"></a>
+<span class="sourceLineNo">121</span><a name="line.121"></a>
+<span class="sourceLineNo">122</span>  @Override public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.122"></a>
+<span class="sourceLineNo">123</span>    return Optional.of(observer);<a name="line.123"></a>
+<span class="sourceLineNo">124</span>  }<a name="line.124"></a>
+<span class="sourceLineNo">125</span><a name="line.125"></a>
+<span class="sourceLineNo">126</span>  @Override<a name="line.126"></a>
+<span class="sourceLineNo">127</span>  public void start(CoprocessorEnvironment env) throws IOException {<a name="line.127"></a>
+<span class="sourceLineNo">128</span>    // start for the RegionServerObserver will be called only once in the lifetime of the<a name="line.128"></a>
+<span class="sourceLineNo">129</span>    // server. We will construct and register all metrics that we will track across method<a name="line.129"></a>
+<span class="sourceLineNo">130</span>    // invocations.<a name="line.130"></a>
+<span class="sourceLineNo">131</span><a name="line.131"></a>
+<span class="sourceLineNo">132</span>    if (env instanceof RegionCoprocessorEnvironment) {<a name="line.132"></a>
+<span class="sourceLineNo">133</span>      // Obtain the MetricRegistry for the RegionServer. Metrics from this registry will be reported<a name="line.133"></a>
+<span class="sourceLineNo">134</span>      // at the region server level per-regionserver.<a name="line.134"></a>
+<span class="sourceLineNo">135</span>      MetricRegistry registry =<a name="line.135"></a>
+<span class="sourceLineNo">136</span>          ((RegionCoprocessorEnvironment) env).getMetricRegistryForRegionServer();<a name="line.136"></a>
+<span class="sourceLineNo">137</span>      observer = new ExampleRegionObserver();<a name="line.137"></a>
+<span class="sourceLineNo">138</span><a name="line.138"></a>
+<span class="sourceLineNo">139</span>      if (preGetCounter == null) {<a name="line.139"></a>
+<span class="sourceLineNo">140</span>        // Create a new Counter, or get the already registered counter.<a name="line.140"></a>
+<span class="sourceLineNo">141</span>        // It is much better to only call this once and save the Counter as a class field instead<a name="line.141"></a>
+<span class="sourceLineNo">142</span>        // of creating the counter every time a coprocessor method is invoked. This will negate<a name="line.142"></a>
+<span class="sourceLineNo">143</span>        // any performance bottleneck coming from map lookups tracking metrics in the registry.<a name="line.143"></a>
+<span class="sourceLineNo">144</span>        // Returned counter instance is shared by all coprocessors of the same class in the same<a name="line.144"></a>
+<span class="sourceLineNo">145</span>        // region server.<a name="line.145"></a>
+<span class="sourceLineNo">146</span>        preGetCounter = registry.counter("preGetRequests");<a name="line.146"></a>
+<span class="sourceLineNo">147</span>      }<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span>      if (costlyOperationTimer == null) {<a name="line.149"></a>
+<span class="sourceLineNo">150</span>        // Create a Timer to track execution times for the costly operation.<a name="line.150"></a>
+<span class="sourceLineNo">151</span>        costlyOperationTimer = registry.timer("costlyOperation");<a name="line.151"></a>
+<span class="sourceLineNo">152</span>      }<a name="line.152"></a>
+<span class="sourceLineNo">153</span><a name="line.153"></a>
+<span class="sourceLineNo">154</span>      if (flushCounter == null) {<a name="line.154"></a>
+<span class="sourceLineNo">155</span>        // Track the number of flushes that have completed<a name="line.155"></a>
+<span class="sourceLineNo">156</span>        flushCounter = registry.counter("flushesCompleted");<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      }<a name="line.157"></a>
+<span class="sourceLineNo">158</span><a name="line.158"></a>
+<span class="sourceLineNo">159</span>      if (filesCompactedCounter == null) {<a name="line.159"></a>
+<span class="sourceLineNo">160</span>        // Track the number of files that were compacted (many files may be rewritten in a single<a name="line.160"></a>
+<span class="sourceLineNo">161</span>        // compaction).<a name="line.161"></a>
+<span class="sourceLineNo">162</span>        filesCompactedCounter = registry.counter("filesCompacted");<a name="line.162"></a>
+<span class="sourceLineNo">163</span>      }<a name="line.163"></a>
+<span class="sourceLineNo">164</span>    }<a name="line.164"></a>
+<span class="sourceLineNo">165</span>  }<a name="line.165"></a>
+<span class="sourceLineNo">166</span><a name="line.166"></a>
+<span class="sourceLineNo">167</span>  @Override<a name="line.167"></a>
+<span class="sourceLineNo">168</span>  public void stop(CoprocessorEnvironment e) throws IOException {<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    // we should NOT remove / deregister the metrics in stop(). The whole registry will be<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    // removed when the last region of the table is closed.<a name="line.170"></a>
+<span class="sourceLineNo">171</span>  }<a name="line.171"></a>
+<span class="sourceLineNo">172</span>}<a name="line.172"></a>
 
 
 

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a108018f/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html
index 7a70a5b..a7535b9 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ExampleRegionObserverWithMetrics.html
@@ -43,99 +43,141 @@
 <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.metrics.Counter;<a name="line.35"></a>
 <span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.metrics.MetricRegistry;<a name="line.36"></a>
 <span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.metrics.Timer;<a name="line.37"></a>
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-<span class="sourceLineNo">039</span>/**<a name="line.39"></a>
-<span class="sourceLineNo">040</span> * An example coprocessor that collects some metrics to demonstrate the usage of exporting custom<a name="line.40"></a>
-<span class="sourceLineNo">041</span> * metrics from the coprocessor.<a name="line.41"></a>
-<span class="sourceLineNo">042</span> * &lt;p&gt;<a name="line.42"></a>
-<span class="sourceLineNo">043</span> * These metrics will be available through the regular Hadoop metrics2 sinks (ganglia, opentsdb,<a name="line.43"></a>
-<span class="sourceLineNo">044</span> * etc) as well as JMX output. You can view a snapshot of the metrics by going to the http web UI<a name="line.44"></a>
-<span class="sourceLineNo">045</span> * of the regionserver page, something like http://myregionserverhost:16030/jmx<a name="line.45"></a>
-<span class="sourceLineNo">046</span> * &lt;/p&gt;<a name="line.46"></a>
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-<span class="sourceLineNo">048</span> * @see ExampleMasterObserverWithMetrics<a name="line.48"></a>
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-<span class="sourceLineNo">050</span>public class ExampleRegionObserverWithMetrics implements RegionCoprocessor {<a name="line.50"></a>
-<span class="sourceLineNo">051</span><a name="line.51"></a>
-<span class="sourceLineNo">052</span>  private Counter preGetCounter;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>  private Timer costlyOperationTimer;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>  private ExampleRegionObserver observer;<a name="line.54"></a>
-<span class="sourceLineNo">055</span><a name="line.55"></a>
-<span class="sourceLineNo">056</span>  class ExampleRegionObserver implements RegionCoprocessor, RegionObserver {<a name="line.56"></a>
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-<span class="sourceLineNo">058</span>    public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.58"></a>
-<span class="sourceLineNo">059</span>      return Optional.of(this);<a name="line.59"></a>
-<span class="sourceLineNo">060</span>    }<a name="line.60"></a>
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-<span class="sourceLineNo">062</span>    @Override<a name="line.62"></a>
-<span class="sourceLineNo">063</span>    public void preGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, Get get,<a name="line.63"></a>
-<span class="sourceLineNo">064</span>        List&lt;Cell&gt; results) throws IOException {<a name="line.64"></a>
-<span class="sourceLineNo">065</span>      // Increment the Counter whenever the coprocessor is called<a name="line.65"></a>
-<span class="sourceLineNo">066</span>      preGetCounter.increment();<a name="line.66"></a>
+<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.FlushLifeCycleTracker;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.regionserver.Store;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.regionserver.StoreFile;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest;<a name="line.42"></a>
+<span class="sourceLineNo">043</span><a name="line.43"></a>
+<span class="sourceLineNo">044</span>/**<a name="line.44"></a>
+<span class="sourceLineNo">045</span> * An example coprocessor that collects some metrics to demonstrate the usage of exporting custom<a name="line.45"></a>
+<span class="sourceLineNo">046</span> * metrics from the coprocessor.<a name="line.46"></a>
+<span class="sourceLineNo">047</span> * &lt;p&gt;<a name="line.47"></a>
+<span class="sourceLineNo">048</span> * These metrics will be available through the regular Hadoop metrics2 sinks (ganglia, opentsdb,<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * etc) as well as JMX output. You can view a snapshot of the metrics by going to the http web UI<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * of the regionserver page, something like http://myregionserverhost:16030/jmx<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * &lt;/p&gt;<a name="line.51"></a>
+<span class="sourceLineNo">052</span> *<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * @see ExampleMasterObserverWithMetrics<a name="line.53"></a>
+<span class="sourceLineNo">054</span> */<a name="line.54"></a>
+<span class="sourceLineNo">055</span>public class ExampleRegionObserverWithMetrics implements RegionCoprocessor {<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  private Counter preGetCounter;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>  private Counter flushCounter;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>  private Counter filesCompactedCounter;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>  private Timer costlyOperationTimer;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>  private ExampleRegionObserver observer;<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  class ExampleRegionObserver implements RegionCoprocessor, RegionObserver {<a name="line.63"></a>
+<span class="sourceLineNo">064</span>    @Override<a name="line.64"></a>
+<span class="sourceLineNo">065</span>    public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.65"></a>
+<span class="sourceLineNo">066</span>      return Optional.of(this);<a name="line.66"></a>
 <span class="sourceLineNo">067</span>    }<a name="line.67"></a>
 <span class="sourceLineNo">068</span><a name="line.68"></a>
 <span class="sourceLineNo">069</span>    @Override<a name="line.69"></a>
-<span class="sourceLineNo">070</span>    public void postGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, Get get,<a name="line.70"></a>
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 <span class="sourceLineNo">071</span>        List&lt;Cell&gt; results) throws IOException {<a name="line.71"></a>
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-<span class="sourceLineNo">073</span>      // using a Timer (which is a Meter and a Histogram).<a name="line.73"></a>
-<span class="sourceLineNo">074</span>      long start = System.nanoTime();<a name="line.74"></a>
-<span class="sourceLineNo">075</span>      try {<a name="line.75"></a>
-<span class="sourceLineNo">076</span>        performCostlyOperation();<a name="line.76"></a>
-<span class="sourceLineNo">077</span>      } finally {<a name="line.77"></a>
-<span class="sourceLineNo">078</span>        costlyOperationTimer.updateNanos(System.nanoTime() - start);<a name="line.78"></a>
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-<span class="sourceLineNo">081</span><a name="line.81"></a>
-<span class="sourceLineNo">082</span>    private void performCostlyOperation() {<a name="line.82"></a>
-<span class="sourceLineNo">083</span>      try {<a name="line.83"></a>
-<span class="sourceLineNo">084</span>        // simulate the operation by sleeping.<a name="line.84"></a>
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-<span class="sourceLineNo">086</span>      } catch (InterruptedException ignore) {<a name="line.86"></a>
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-<span class="sourceLineNo">091</span>  @Override public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.91"></a>
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-<span class="sourceLineNo">095</span>  @Override<a name="line.95"></a>
-<span class="sourceLineNo">096</span>  public void start(CoprocessorEnvironment env) throws IOException {<a name="line.96"></a>
-<span class="sourceLineNo">097</span>    // start for the RegionServerObserver will be called only once in the lifetime of the<a name="line.97"></a>
-<span class="sourceLineNo">098</span>    // server. We will construct and register all metrics that we will track across method<a name="line.98"></a>
-<span class="sourceLineNo">099</span>    // invocations.<a name="line.99"></a>
-<span class="sourceLineNo">100</span><a name="line.100"></a>
-<span class="sourceLineNo">101</span>    if (env instanceof RegionCoprocessorEnvironment) {<a name="line.101"></a>
-<span class="sourceLineNo">102</span>      // Obtain the MetricRegistry for the RegionServer. Metrics from this registry will be reported<a name="line.102"></a>
-<span class="sourceLineNo">103</span>      // at the region server level per-regionserver.<a name="line.103"></a>
-<span class="sourceLineNo">104</span>      MetricRegistry registry =<a name="line.104"></a>
-<span class="sourceLineNo">105</span>          ((RegionCoprocessorEnvironment) env).getMetricRegistryForRegionServer();<a name="line.105"></a>
-<span class="sourceLineNo">106</span>      observer = new ExampleRegionObserver();<a name="line.106"></a>
-<span class="sourceLineNo">107</span><a name="line.107"></a>
-<span class="sourceLineNo">108</span>      if (preGetCounter == null) {<a name="line.108"></a>
-<span class="sourceLineNo">109</span>        // Create a new Counter, or get the already registered counter.<a name="line.109"></a>
-<span class="sourceLineNo">110</span>        // It is much better to only call this once and save the Counter as a class field instead<a name="line.110"></a>
-<span class="sourceLineNo">111</span>        // of creating the counter every time a coprocessor method is invoked. This will negate<a name="line.111"></a>
-<span class="sourceLineNo">112</span>        // any performance bottleneck coming from map lookups tracking metrics in the registry.<a name="line.112"></a>
-<span class="sourceLineNo">113</span>        // Returned counter instance is shared by all coprocessors of the same class in the same<a name="line.113"></a>
-<span class="sourceLineNo">114</span>        // region server.<a name="line.114"></a>
-<span class="sourceLineNo">115</span>        preGetCounter = registry.counter("preGetRequests");<a name="line.115"></a>
-<span class="sourceLineNo">116</span>      }<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span>      if (costlyOperationTimer == null) {<a name="line.118"></a>
-<span class="sourceLineNo">119</span>        // Create a Timer to track execution times for the costly operation.<a name="line.119"></a>
-<span class="sourceLineNo">120</span>        costlyOperationTimer = registry.timer("costlyOperation");<a name="line.120"></a>
-<span class="sourceLineNo">121</span>      }<a name="line.121"></a>
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-<span class="sourceLineNo">129</span>  }<a name="line.129"></a>
-<span class="sourceLineNo">130</span>}<a name="line.130"></a>
+<span class="sourceLineNo">072</span>      // Increment the Counter whenever the coprocessor is called<a name="line.72"></a>
+<span class="sourceLineNo">073</span>      preGetCounter.increment();<a name="line.73"></a>
+<span class="sourceLineNo">074</span>    }<a name="line.74"></a>
+<span class="sourceLineNo">075</span><a name="line.75"></a>
+<span class="sourceLineNo">076</span>    @Override<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    public void postGetOp(ObserverContext&lt;RegionCoprocessorEnvironment&gt; e, Get get,<a name="line.77"></a>
+<span class="sourceLineNo">078</span>        List&lt;Cell&gt; results) throws IOException {<a name="line.78"></a>
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+<span class="sourceLineNo">088</span><a name="line.88"></a>
+<span class="sourceLineNo">089</span>    @Override<a name="line.89"></a>
+<span class="sourceLineNo">090</span>    public void postFlush(<a name="line.90"></a>
+<span class="sourceLineNo">091</span>        ObserverContext&lt;RegionCoprocessorEnvironment&gt; c,<a name="line.91"></a>
+<span class="sourceLineNo">092</span>        FlushLifeCycleTracker tracker) throws IOException {<a name="line.92"></a>
+<span class="sourceLineNo">093</span>      flushCounter.increment();<a name="line.93"></a>
+<span class="sourceLineNo">094</span>    }<a name="line.94"></a>
+<span class="sourceLineNo">095</span><a name="line.95"></a>
+<span class="sourceLineNo">096</span>    @Override<a name="line.96"></a>
+<span class="sourceLineNo">097</span>    public void postFlush(<a name="line.97"></a>
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+<span class="sourceLineNo">099</span>        FlushLifeCycleTracker tracker) throws IOException {<a name="line.99"></a>
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+<span class="sourceLineNo">101</span>    }<a name="line.101"></a>
+<span class="sourceLineNo">102</span><a name="line.102"></a>
+<span class="sourceLineNo">103</span>    @Override<a name="line.103"></a>
+<span class="sourceLineNo">104</span>    public void postCompactSelection(<a name="line.104"></a>
+<span class="sourceLineNo">105</span>        ObserverContext&lt;RegionCoprocessorEnvironment&gt; c, Store store,<a name="line.105"></a>
+<span class="sourceLineNo">106</span>        List&lt;? extends StoreFile&gt; selected, CompactionLifeCycleTracker tracker,<a name="line.106"></a>
+<span class="sourceLineNo">107</span>        CompactionRequest request) {<a name="line.107"></a>
+<span class="sourceLineNo">108</span>      if (selected != null) {<a name="line.108"></a>
+<span class="sourceLineNo">109</span>        filesCompactedCounter.increment(selected.size());<a name="line.109"></a>
+<span class="sourceLineNo">110</span>      }<a name="line.110"></a>
+<span class="sourceLineNo">111</span>    }<a name="line.111"></a>
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+<span class="sourceLineNo">113</span>    private void performCostlyOperation() {<a name="line.113"></a>
+<span class="sourceLineNo">114</span>      try {<a name="line.114"></a>
+<span class="sourceLineNo">115</span>        // simulate the operation by sleeping.<a name="line.115"></a>
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+<span class="sourceLineNo">121</span><a name="line.121"></a>
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+<span class="sourceLineNo">123</span>    return Optional.of(observer);<a name="line.123"></a>
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+<span class="sourceLineNo">125</span><a name="line.125"></a>
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+<span class="sourceLineNo">127</span>  public void start(CoprocessorEnvironment env) throws IOException {<a name="line.127"></a>
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+<span class="sourceLineNo">130</span>    // invocations.<a name="line.130"></a>
+<span class="sourceLineNo">131</span><a name="line.131"></a>
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+<span class="sourceLineNo">134</span>      // at the region server level per-regionserver.<a name="line.134"></a>
+<span class="sourceLineNo">135</span>      MetricRegistry registry =<a name="line.135"></a>
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+<span class="sourceLineNo">137</span>      observer = new ExampleRegionObserver();<a name="line.137"></a>
+<span class="sourceLineNo">138</span><a name="line.138"></a>
+<span class="sourceLineNo">139</span>      if (preGetCounter == null) {<a name="line.139"></a>
+<span class="sourceLineNo">140</span>        // Create a new Counter, or get the already registered counter.<a name="line.140"></a>
+<span class="sourceLineNo">141</span>        // It is much better to only call this once and save the Counter as a class field instead<a name="line.141"></a>
+<span class="sourceLineNo">142</span>        // of creating the counter every time a coprocessor method is invoked. This will negate<a name="line.142"></a>
+<span class="sourceLineNo">143</span>        // any performance bottleneck coming from map lookups tracking metrics in the registry.<a name="line.143"></a>
+<span class="sourceLineNo">144</span>        // Returned counter instance is shared by all coprocessors of the same class in the same<a name="line.144"></a>
+<span class="sourceLineNo">145</span>        // region server.<a name="line.145"></a>
+<span class="sourceLineNo">146</span>        preGetCounter = registry.counter("preGetRequests");<a name="line.146"></a>
+<span class="sourceLineNo">147</span>      }<a name="line.147"></a>
+<span class="sourceLineNo">148</span><a name="line.148"></a>
+<span class="sourceLineNo">149</span>      if (costlyOperationTimer == null) {<a name="line.149"></a>
+<span class="sourceLineNo">150</span>        // Create a Timer to track execution times for the costly operation.<a name="line.150"></a>
+<span class="sourceLineNo">151</span>        costlyOperationTimer = registry.timer("costlyOperation");<a name="line.151"></a>
+<span class="sourceLineNo">152</span>      }<a name="line.152"></a>
+<span class="sourceLineNo">153</span><a name="line.153"></a>
+<span class="sourceLineNo">154</span>      if (flushCounter == null) {<a name="line.154"></a>
+<span class="sourceLineNo">155</span>        // Track the number of flushes that have completed<a name="line.155"></a>
+<span class="sourceLineNo">156</span>        flushCounter = registry.counter("flushesCompleted");<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      }<a name="line.157"></a>
+<span class="sourceLineNo">158</span><a name="line.158"></a>
+<span class="sourceLineNo">159</span>      if (filesCompactedCounter == null) {<a name="line.159"></a>
+<span class="sourceLineNo">160</span>        // Track the number of files that were compacted (many files may be rewritten in a single<a name="line.160"></a>
+<span class="sourceLineNo">161</span>        // compaction).<a name="line.161"></a>
+<span class="sourceLineNo">162</span>        filesCompactedCounter = registry.counter("filesCompacted");<a name="line.162"></a>
+<span class="sourceLineNo">163</span>      }<a name="line.163"></a>
+<span class="sourceLineNo">164</span>    }<a name="line.164"></a>
+<span class="sourceLineNo">165</span>  }<a name="line.165"></a>
+<span class="sourceLineNo">166</span><a name="line.166"></a>
+<span class="sourceLineNo">167</span>  @Override<a name="line.167"></a>
+<span class="sourceLineNo">168</span>  public void stop(CoprocessorEnvironment e) throws IOException {<a name="line.168"></a>
+<span class="sourceLineNo">169</span>    // we should NOT remove / deregister the metrics in stop(). The whole registry will be<a name="line.169"></a>
+<span class="sourceLineNo">170</span>    // removed when the last region of the table is closed.<a name="line.170"></a>
+<span class="sourceLineNo">171</span>  }<a name="line.171"></a>
+<span class="sourceLineNo">172</span>}<a name="line.172"></a>
 
 
 

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a108018f/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ScanModifyingObserver.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ScanModifyingObserver.html b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ScanModifyingObserver.html
new file mode 100644
index 0000000..6954f09
--- /dev/null
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ScanModifyingObserver.html
@@ -0,0 +1,135 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
+<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
+<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
+<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
+<span class="sourceLineNo">005</span> * The ASF licenses this file to you under the Apache License, Version 2.0<a name="line.5"></a>
+<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
+<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
+<span class="sourceLineNo">008</span> *<a name="line.8"></a>
+<span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
+<span class="sourceLineNo">010</span> *<a name="line.10"></a>
+<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
+<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
+<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
+<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
+<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
+<span class="sourceLineNo">016</span> */<a name="line.16"></a>
+<span class="sourceLineNo">017</span>package org.apache.hadoop.hbase.coprocessor.example;<a name="line.17"></a>
+<span class="sourceLineNo">018</span><a name="line.18"></a>
+<span class="sourceLineNo">019</span>import java.io.IOException;<a name="line.19"></a>
+<span class="sourceLineNo">020</span>import java.util.Optional;<a name="line.20"></a>
+<span class="sourceLineNo">021</span><a name="line.21"></a>
+<span class="sourceLineNo">022</span>import org.apache.hadoop.hbase.CoprocessorEnvironment;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.client.Scan;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.coprocessor.ObserverContext;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.coprocessor.RegionObserver;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.28"></a>
+<span class="sourceLineNo">029</span><a name="line.29"></a>
+<span class="sourceLineNo">030</span>/**<a name="line.30"></a>
+<span class="sourceLineNo">031</span> * A RegionObserver which modifies incoming Scan requests to include additional<a name="line.31"></a>
+<span class="sourceLineNo">032</span> * columns than what the user actually requested.<a name="line.32"></a>
+<span class="sourceLineNo">033</span> */<a name="line.33"></a>
+<span class="sourceLineNo">034</span>public class ScanModifyingObserver implements RegionCoprocessor, RegionObserver {<a name="line.34"></a>
+<span class="sourceLineNo">035</span><a name="line.35"></a>
+<span class="sourceLineNo">036</span>  public static final String FAMILY_TO_ADD_KEY = "hbase.examples.coprocessor.scanmodifying.family";<a name="line.36"></a>
+<span class="sourceLineNo">037</span>  public static final String QUALIFIER_TO_ADD_KEY =<a name="line.37"></a>
+<span class="sourceLineNo">038</span>      "hbase.examples.coprocessor.scanmodifying.qualifier";<a name="line.38"></a>
+<span class="sourceLineNo">039</span><a name="line.39"></a>
+<span class="sourceLineNo">040</span>  private byte[] FAMILY_TO_ADD = null;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>  private byte[] QUALIFIER_TO_ADD = null;<a name="line.41"></a>
+<span class="sourceLineNo">042</span><a name="line.42"></a>
+<span class="sourceLineNo">043</span>  @Override<a name="line.43"></a>
+<span class="sourceLineNo">044</span>  public void start(<a name="line.44"></a>
+<span class="sourceLineNo">045</span>      @SuppressWarnings("rawtypes") CoprocessorEnvironment env) throws IOException {<a name="line.45"></a>
+<span class="sourceLineNo">046</span>    RegionCoprocessorEnvironment renv = (RegionCoprocessorEnvironment) env;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>    FAMILY_TO_ADD = Bytes.toBytes(renv.getConfiguration().get(FAMILY_TO_ADD_KEY));<a name="line.47"></a>
+<span class="sourceLineNo">048</span>    QUALIFIER_TO_ADD = Bytes.toBytes(renv.getConfiguration().get(QUALIFIER_TO_ADD_KEY));<a name="line.48"></a>
+<span class="sourceLineNo">049</span>  }<a name="line.49"></a>
+<span class="sourceLineNo">050</span><a name="line.50"></a>
+<span class="sourceLineNo">051</span>  @Override<a name="line.51"></a>
+<span class="sourceLineNo">052</span>  public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.52"></a>
+<span class="sourceLineNo">053</span>    // Extremely important to be sure that the coprocessor is invoked as a RegionObserver<a name="line.53"></a>
+<span class="sourceLineNo">054</span>    return Optional.of(this);<a name="line.54"></a>
+<span class="sourceLineNo">055</span>  }<a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  @Override<a name="line.57"></a>
+<span class="sourceLineNo">058</span>  public void preScannerOpen(<a name="line.58"></a>
+<span class="sourceLineNo">059</span>      ObserverContext&lt;RegionCoprocessorEnvironment&gt; c, Scan scan) throws IOException {<a name="line.59"></a>
+<span class="sourceLineNo">060</span>    // Add another family:qualifier<a name="line.60"></a>
+<span class="sourceLineNo">061</span>    scan.addColumn(FAMILY_TO_ADD, QUALIFIER_TO_ADD);<a name="line.61"></a>
+<span class="sourceLineNo">062</span>  }<a name="line.62"></a>
+<span class="sourceLineNo">063</span>}<a name="line.63"></a>
+
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+</pre>
+</div>
+</body>
+</html>

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a108018f/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ValueRewritingObserver.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ValueRewritingObserver.html b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ValueRewritingObserver.html
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+++ b/devapidocs/src-html/org/apache/hadoop/hbase/coprocessor/example/ValueRewritingObserver.html
@@ -0,0 +1,186 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html lang="en">
+<head>
+<title>Source code</title>
+<link rel="stylesheet" type="text/css" href="../../../../../../../stylesheet.css" title="Style">
+</head>
+<body>
+<div class="sourceContainer">
+<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
+<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
+<span class="sourceLineNo">003</span> * contributor license agreements.  See the NOTICE file distributed with<a name="line.3"></a>
+<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
+<span class="sourceLineNo">005</span> * The ASF licenses this file to you under the Apache License, Version 2.0<a name="line.5"></a>
+<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
+<span class="sourceLineNo">007</span> * the License.  You may obtain a copy of the License at<a name="line.7"></a>
+<span class="sourceLineNo">008</span> *<a name="line.8"></a>
+<span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
+<span class="sourceLineNo">010</span> *<a name="line.10"></a>
+<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
+<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
+<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
+<span class="sourceLineNo">014</span> * See the License for the specific language governing permissions and<a name="line.14"></a>
+<span class="sourceLineNo">015</span> * limitations under the License.<a name="line.15"></a>
+<span class="sourceLineNo">016</span> */<a name="line.16"></a>
+<span class="sourceLineNo">017</span>package org.apache.hadoop.hbase.coprocessor.example;<a name="line.17"></a>
+<span class="sourceLineNo">018</span><a name="line.18"></a>
+<span class="sourceLineNo">019</span>import java.io.IOException;<a name="line.19"></a>
+<span class="sourceLineNo">020</span>import java.util.List;<a name="line.20"></a>
+<span class="sourceLineNo">021</span>import java.util.Optional;<a name="line.21"></a>
+<span class="sourceLineNo">022</span><a name="line.22"></a>
+<span class="sourceLineNo">023</span>import org.apache.hadoop.hbase.Cell;<a name="line.23"></a>
+<span class="sourceLineNo">024</span>import org.apache.hadoop.hbase.CellBuilder;<a name="line.24"></a>
+<span class="sourceLineNo">025</span>import org.apache.hadoop.hbase.CellBuilder.DataType;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.hadoop.hbase.CellBuilderFactory;<a name="line.26"></a>
+<span class="sourceLineNo">027</span>import org.apache.hadoop.hbase.CellBuilderType;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import org.apache.hadoop.hbase.CellUtil;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import org.apache.hadoop.hbase.CoprocessorEnvironment;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.hbase.coprocessor.ObserverContext;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessor;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.coprocessor.RegionObserver;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.regionserver.InternalScanner;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.regionserver.ScanType;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.regionserver.ScannerContext;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.regionserver.Store;<a name="line.37"></a>
+<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionLifeCycleTracker;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.regionserver.compactions.CompactionRequest;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.40"></a>
+<span class="sourceLineNo">041</span><a name="line.41"></a>
+<span class="sourceLineNo">042</span>/**<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * This RegionObserver replaces the values of Puts from one value to another on compaction.<a name="line.43"></a>
+<span class="sourceLineNo">044</span> */<a name="line.44"></a>
+<span class="sourceLineNo">045</span>public class ValueRewritingObserver implements RegionObserver, RegionCoprocessor {<a name="line.45"></a>
+<span class="sourceLineNo">046</span>  public static final String ORIGINAL_VALUE_KEY =<a name="line.46"></a>
+<span class="sourceLineNo">047</span>      "hbase.examples.coprocessor.value.rewrite.orig";<a name="line.47"></a>
+<span class="sourceLineNo">048</span>  public static final String REPLACED_VALUE_KEY =<a name="line.48"></a>
+<span class="sourceLineNo">049</span>      "hbase.examples.coprocessor.value.rewrite.replaced";<a name="line.49"></a>
+<span class="sourceLineNo">050</span><a name="line.50"></a>
+<span class="sourceLineNo">051</span>  private byte[] sourceValue = null;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>  private byte[] replacedValue = null;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>  private Bytes.ByteArrayComparator comparator;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>  private CellBuilder cellBuilder;<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span><a name="line.56"></a>
+<span class="sourceLineNo">057</span>  @Override<a name="line.57"></a>
+<span class="sourceLineNo">058</span>  public Optional&lt;RegionObserver&gt; getRegionObserver() {<a name="line.58"></a>
+<span class="sourceLineNo">059</span>    // Extremely important to be sure that the coprocessor is invoked as a RegionObserver<a name="line.59"></a>
+<span class="sourceLineNo">060</span>    return Optional.of(this);<a name="line.60"></a>
+<span class="sourceLineNo">061</span>  }<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  @Override<a name="line.63"></a>
+<span class="sourceLineNo">064</span>  public void start(<a name="line.64"></a>
+<span class="sourceLineNo">065</span>      @SuppressWarnings("rawtypes") CoprocessorEnvironment env) throws IOException {<a name="line.65"></a>
+<span class="sourceLineNo">066</span>    RegionCoprocessorEnvironment renv = (RegionCoprocessorEnvironment) env;<a name="line.66"></a>
+<span class="sourceLineNo">067</span>    sourceValue = Bytes.toBytes(renv.getConfiguration().get(ORIGINAL_VALUE_KEY));<a name="line.67"></a>
+<span class="sourceLineNo">068</span>    replacedValue = Bytes.toBytes(renv.getConfiguration().get(REPLACED_VALUE_KEY));<a name="line.68"></a>
+<span class="sourceLineNo">069</span>    comparator = new Bytes.ByteArrayComparator();<a name="line.69"></a>
+<span class="sourceLineNo">070</span>    cellBuilder = CellBuilderFactory.create(CellBuilderType.SHALLOW_COPY);<a name="line.70"></a>
+<span class="sourceLineNo">071</span>  }<a name="line.71"></a>
+<span class="sourceLineNo">072</span><a name="line.72"></a>
+<span class="sourceLineNo">073</span>  @Override<a name="line.73"></a>
+<span class="sourceLineNo">074</span>  public InternalScanner preCompact(<a name="line.74"></a>
+<span class="sourceLineNo">075</span>      ObserverContext&lt;RegionCoprocessorEnvironment&gt; c, Store store,<a name="line.75"></a>
+<span class="sourceLineNo">076</span>      final InternalScanner scanner, ScanType scanType, CompactionLifeCycleTracker tracker,<a name="line.76"></a>
+<span class="sourceLineNo">077</span>      CompactionRequest request) {<a name="line.77"></a>
+<span class="sourceLineNo">078</span>    InternalScanner modifyingScanner = new InternalScanner() {<a name="line.78"></a>
+<span class="sourceLineNo">079</span>      @Override<a name="line.79"></a>
+<span class="sourceLineNo">080</span>      public boolean next(List&lt;Cell&gt; result, ScannerContext scannerContext) throws IOException {<a name="line.80"></a>
+<span class="sourceLineNo">081</span>        boolean ret = scanner.next(result, scannerContext);<a name="line.81"></a>
+<span class="sourceLineNo">082</span>        for (int i = 0; i &lt; result.size(); i++) {<a name="line.82"></a>
+<span class="sourceLineNo">083</span>          Cell c = result.get(i);<a name="line.83"></a>
+<span class="sourceLineNo">084</span>          // Replace the Cell if the value is the one we're replacing<a name="line.84"></a>
+<span class="sourceLineNo">085</span>          if (CellUtil.isPut(c) &amp;&amp;<a name="line.85"></a>
+<span class="sourceLineNo">086</span>              comparator.compare(CellUtil.cloneValue(c), sourceValue) == 0) {<a name="line.86"></a>
+<span class="sourceLineNo">087</span>            try {<a name="line.87"></a>
+<span class="sourceLineNo">088</span>              cellBuilder.setRow(CellUtil.copyRow(c));<a name="line.88"></a>
+<span class="sourceLineNo">089</span>              cellBuilder.setFamily(CellUtil.cloneFamily(c));<a name="line.89"></a>
+<span class="sourceLineNo">090</span>              cellBuilder.setQualifier(CellUtil.cloneQualifier(c));<a name="line.90"></a>
+<span class="sourceLineNo">091</span>              cellBuilder.setTimestamp(c.getTimestamp());<a name="line.91"></a>
+<span class="sourceLineNo">092</span>              cellBuilder.setType(DataType.Put);<a name="line.92"></a>
+<span class="sourceLineNo">093</span>              // Make sure each cell gets a unique value<a name="line.93"></a>
+<span class="sourceLineNo">094</span>              byte[] clonedValue = new byte[replacedValue.length];<a name="line.94"></a>
+<span class="sourceLineNo">095</span>              System.arraycopy(replacedValue, 0, clonedValue, 0, replacedValue.length);<a name="line.95"></a>
+<span class="sourceLineNo">096</span>              cellBuilder.setValue(clonedValue);<a name="line.96"></a>
+<span class="sourceLineNo">097</span>              result.set(i, cellBuilder.build());<a name="line.97"></a>
+<span class="sourceLineNo">098</span>            } finally {<a name="line.98"></a>
+<span class="sourceLineNo">099</span>              cellBuilder.clear();<a name="line.99"></a>
+<span class="sourceLineNo">100</span>            }<a name="line.100"></a>
+<span class="sourceLineNo">101</span>          }<a name="line.101"></a>
+<span class="sourceLineNo">102</span>        }<a name="line.102"></a>
+<span class="sourceLineNo">103</span>        return ret;<a name="line.103"></a>
+<span class="sourceLineNo">104</span>      }<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span>      @Override<a name="line.106"></a>
+<span class="sourceLineNo">107</span>      public void close() throws IOException {<a name="line.107"></a>
+<span class="sourceLineNo">108</span>        scanner.close();<a name="line.108"></a>
+<span class="sourceLineNo">109</span>      }<a name="line.109"></a>
+<span class="sourceLineNo">110</span>    };<a name="line.110"></a>
+<span class="sourceLineNo">111</span><a name="line.111"></a>
+<span class="sourceLineNo">112</span>    return modifyingScanner;<a name="line.112"></a>
+<span class="sourceLineNo">113</span>  }<a name="line.113"></a>
+<span class="sourceLineNo">114</span>}<a name="line.114"></a>
+
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+</pre>
+</div>
+</body>
+</html>

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a108018f/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
index fa16fe4..964dc08 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
@@ -664,7 +664,7 @@
 <span class="sourceLineNo">656</span>    }<a name="line.656"></a>
 <span class="sourceLineNo">657</span><a name="line.657"></a>
 <span class="sourceLineNo">658</span>    if (!master.getAssignmentManager().isFailoverCleanupDone()) {<a name="line.658"></a>
-<span class="sourceLineNo">659</span>      LOG.info("AssignmentManager hasn't finished failover cleanup; waiting");<a name="line.659"></a>
+<span class="sourceLineNo">659</span>      LOG.debug("AssignmentManager failover cleanup not done.");<a name="line.659"></a>
 <span class="sourceLineNo">660</span>    }<a name="line.660"></a>
 <span class="sourceLineNo">661</span><a name="line.661"></a>
 <span class="sourceLineNo">662</span>    for (Map.Entry&lt;ServerName, Boolean&gt; entry : requeuedDeadServers.entrySet()) {<a name="line.662"></a>


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