http://git-wip-us.apache.org/repos/asf/hbase-site/blob/47be635d/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.html
----------------------------------------------------------------------
diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.html 
b/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.html
index cd6c8c8..380e362 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.html
@@ -38,195 +38,257 @@
 <span class="sourceLineNo">030</span>import 
org.apache.commons.collections.buffer.CircularFifoBuffer;<a name="line.30"></a>
 <span class="sourceLineNo">031</span>import org.apache.commons.logging.Log;<a 
name="line.31"></a>
 <span class="sourceLineNo">032</span>import 
org.apache.commons.logging.LogFactory;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import 
org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.33"></a>
-<span class="sourceLineNo">034</span><a name="line.34"></a>
-<span class="sourceLineNo">035</span>import 
org.apache.hadoop.hbase.shaded.com.google.common.annotations.VisibleForTesting;<a
 name="line.35"></a>
-<span class="sourceLineNo">036</span>import 
org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a 
name="line.36"></a>
-<span class="sourceLineNo">037</span><a name="line.37"></a>
-<span class="sourceLineNo">038</span>/**<a name="line.38"></a>
-<span class="sourceLineNo">039</span> * Singleton which keeps track of tasks 
going on in this VM.<a name="line.39"></a>
-<span class="sourceLineNo">040</span> * A Task here is anything which takes 
more than a few seconds<a name="line.40"></a>
-<span class="sourceLineNo">041</span> * and the user might want to inquire 
about the status<a name="line.41"></a>
-<span class="sourceLineNo">042</span> */<a name="line.42"></a>
-<span class="sourceLineNo">043</span>@InterfaceAudience.Private<a 
name="line.43"></a>
-<span class="sourceLineNo">044</span>public class TaskMonitor {<a 
name="line.44"></a>
-<span class="sourceLineNo">045</span>  private static final Log LOG = 
LogFactory.getLog(TaskMonitor.class);<a name="line.45"></a>
-<span class="sourceLineNo">046</span><a name="line.46"></a>
-<span class="sourceLineNo">047</span>  // Don't keep around any tasks that 
have completed more than<a name="line.47"></a>
-<span class="sourceLineNo">048</span>  // 60 seconds ago<a name="line.48"></a>
-<span class="sourceLineNo">049</span>  private static final long 
EXPIRATION_TIME = 60*1000;<a name="line.49"></a>
-<span class="sourceLineNo">050</span><a name="line.50"></a>
-<span class="sourceLineNo">051</span>  @VisibleForTesting<a name="line.51"></a>
-<span class="sourceLineNo">052</span>  static final int MAX_TASKS = 1000;<a 
name="line.52"></a>
-<span class="sourceLineNo">053</span>  <a name="line.53"></a>
-<span class="sourceLineNo">054</span>  private static TaskMonitor instance;<a 
name="line.54"></a>
-<span class="sourceLineNo">055</span>  private CircularFifoBuffer tasks = new 
CircularFifoBuffer(MAX_TASKS);<a name="line.55"></a>
-<span class="sourceLineNo">056</span>  private List&lt;TaskAndWeakRefPair&gt; 
rpcTasks = Lists.newArrayList();<a name="line.56"></a>
-<span class="sourceLineNo">057</span><a name="line.57"></a>
-<span class="sourceLineNo">058</span>  /**<a name="line.58"></a>
-<span class="sourceLineNo">059</span>   * Get singleton instance.<a 
name="line.59"></a>
-<span class="sourceLineNo">060</span>   * TODO this would be better off scoped 
to a single daemon<a name="line.60"></a>
-<span class="sourceLineNo">061</span>   */<a name="line.61"></a>
-<span class="sourceLineNo">062</span>  public static synchronized TaskMonitor 
get() {<a name="line.62"></a>
-<span class="sourceLineNo">063</span>    if (instance == null) {<a 
name="line.63"></a>
-<span class="sourceLineNo">064</span>      instance = new TaskMonitor();<a 
name="line.64"></a>
-<span class="sourceLineNo">065</span>    }<a name="line.65"></a>
-<span class="sourceLineNo">066</span>    return instance;<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>  public synchronized MonitoredTask 
createStatus(String description) {<a name="line.69"></a>
-<span class="sourceLineNo">070</span>    MonitoredTask stat = new 
MonitoredTaskImpl();<a name="line.70"></a>
-<span class="sourceLineNo">071</span>    stat.setDescription(description);<a 
name="line.71"></a>
-<span class="sourceLineNo">072</span>    MonitoredTask proxy = (MonitoredTask) 
Proxy.newProxyInstance(<a name="line.72"></a>
-<span class="sourceLineNo">073</span>        
stat.getClass().getClassLoader(),<a name="line.73"></a>
-<span class="sourceLineNo">074</span>        new Class&lt;?&gt;[] { 
MonitoredTask.class },<a name="line.74"></a>
-<span class="sourceLineNo">075</span>        new 
PassthroughInvocationHandler&lt;&gt;(stat));<a name="line.75"></a>
-<span class="sourceLineNo">076</span>    TaskAndWeakRefPair pair = new 
TaskAndWeakRefPair(stat, proxy);<a name="line.76"></a>
-<span class="sourceLineNo">077</span>    if (tasks.isFull()) {<a 
name="line.77"></a>
-<span class="sourceLineNo">078</span>      purgeExpiredTasks();<a 
name="line.78"></a>
-<span class="sourceLineNo">079</span>    }<a name="line.79"></a>
-<span class="sourceLineNo">080</span>    tasks.add(pair);<a name="line.80"></a>
-<span class="sourceLineNo">081</span>    return proxy;<a name="line.81"></a>
-<span class="sourceLineNo">082</span>  }<a name="line.82"></a>
-<span class="sourceLineNo">083</span><a name="line.83"></a>
-<span class="sourceLineNo">084</span>  public synchronized MonitoredRPCHandler 
createRPCStatus(String description) {<a name="line.84"></a>
-<span class="sourceLineNo">085</span>    MonitoredRPCHandler stat = new 
MonitoredRPCHandlerImpl();<a name="line.85"></a>
-<span class="sourceLineNo">086</span>    stat.setDescription(description);<a 
name="line.86"></a>
-<span class="sourceLineNo">087</span>    MonitoredRPCHandler proxy = 
(MonitoredRPCHandler) Proxy.newProxyInstance(<a name="line.87"></a>
-<span class="sourceLineNo">088</span>        
stat.getClass().getClassLoader(),<a name="line.88"></a>
-<span class="sourceLineNo">089</span>        new Class&lt;?&gt;[] { 
MonitoredRPCHandler.class },<a name="line.89"></a>
-<span class="sourceLineNo">090</span>        new 
PassthroughInvocationHandler&lt;&gt;(stat));<a name="line.90"></a>
-<span class="sourceLineNo">091</span>    TaskAndWeakRefPair pair = new 
TaskAndWeakRefPair(stat, proxy);<a name="line.91"></a>
-<span class="sourceLineNo">092</span>    rpcTasks.add(pair);<a 
name="line.92"></a>
-<span class="sourceLineNo">093</span>    return proxy;<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>  private synchronized void 
purgeExpiredTasks() {<a name="line.96"></a>
-<span class="sourceLineNo">097</span>    for 
(Iterator&lt;TaskAndWeakRefPair&gt; it = tasks.iterator();<a name="line.97"></a>
-<span class="sourceLineNo">098</span>         it.hasNext();) {<a 
name="line.98"></a>
-<span class="sourceLineNo">099</span>      TaskAndWeakRefPair pair = 
it.next();<a name="line.99"></a>
-<span class="sourceLineNo">100</span>      MonitoredTask stat = pair.get();<a 
name="line.100"></a>
-<span class="sourceLineNo">101</span>      <a name="line.101"></a>
-<span class="sourceLineNo">102</span>      if (pair.isDead()) {<a 
name="line.102"></a>
-<span class="sourceLineNo">103</span>        // The class who constructed this 
leaked it. So we can<a name="line.103"></a>
-<span class="sourceLineNo">104</span>        // assume it's done.<a 
name="line.104"></a>
-<span class="sourceLineNo">105</span>        if (stat.getState() == 
MonitoredTaskImpl.State.RUNNING) {<a name="line.105"></a>
-<span class="sourceLineNo">106</span>          LOG.warn("Status " + stat + " 
appears to have been leaked");<a name="line.106"></a>
-<span class="sourceLineNo">107</span>          stat.cleanup();<a 
name="line.107"></a>
-<span class="sourceLineNo">108</span>        }<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>      if (canPurge(stat)) {<a 
name="line.111"></a>
-<span class="sourceLineNo">112</span>        it.remove();<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>
-<span class="sourceLineNo">115</span>  }<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>   * Produces a list containing copies of 
the current state of all non-expired <a name="line.118"></a>
-<span class="sourceLineNo">119</span>   * MonitoredTasks handled by this 
TaskMonitor.<a name="line.119"></a>
-<span class="sourceLineNo">120</span>   * @return A complete list of 
MonitoredTasks.<a name="line.120"></a>
-<span class="sourceLineNo">121</span>   */<a name="line.121"></a>
-<span class="sourceLineNo">122</span>  public synchronized 
List&lt;MonitoredTask&gt; getTasks() {<a name="line.122"></a>
-<span class="sourceLineNo">123</span>    purgeExpiredTasks();<a 
name="line.123"></a>
-<span class="sourceLineNo">124</span>    ArrayList&lt;MonitoredTask&gt; ret = 
Lists.newArrayListWithCapacity(tasks.size() + rpcTasks.size());<a 
name="line.124"></a>
-<span class="sourceLineNo">125</span>    for 
(Iterator&lt;TaskAndWeakRefPair&gt; it = tasks.iterator();<a 
name="line.125"></a>
-<span class="sourceLineNo">126</span>         it.hasNext();) {<a 
name="line.126"></a>
-<span class="sourceLineNo">127</span>      TaskAndWeakRefPair pair = 
it.next();<a name="line.127"></a>
-<span class="sourceLineNo">128</span>      MonitoredTask t = pair.get();<a 
name="line.128"></a>
-<span class="sourceLineNo">129</span>      ret.add(t.clone());<a 
name="line.129"></a>
-<span class="sourceLineNo">130</span>    }<a name="line.130"></a>
-<span class="sourceLineNo">131</span>    for 
(Iterator&lt;TaskAndWeakRefPair&gt; it = rpcTasks.iterator();<a 
name="line.131"></a>
-<span class="sourceLineNo">132</span>         it.hasNext();) {<a 
name="line.132"></a>
-<span class="sourceLineNo">133</span>      TaskAndWeakRefPair pair = 
it.next();<a name="line.133"></a>
-<span class="sourceLineNo">134</span>      MonitoredTask t = pair.get();<a 
name="line.134"></a>
-<span class="sourceLineNo">135</span>      ret.add(t.clone());<a 
name="line.135"></a>
-<span class="sourceLineNo">136</span>    }<a name="line.136"></a>
-<span class="sourceLineNo">137</span>    return ret;<a name="line.137"></a>
-<span class="sourceLineNo">138</span>  }<a name="line.138"></a>
-<span class="sourceLineNo">139</span><a name="line.139"></a>
-<span class="sourceLineNo">140</span>  private boolean canPurge(MonitoredTask 
stat) {<a name="line.140"></a>
-<span class="sourceLineNo">141</span>    long cts = 
stat.getCompletionTimestamp();<a name="line.141"></a>
-<span class="sourceLineNo">142</span>    return (cts &gt; 0 &amp;&amp; 
System.currentTimeMillis() - cts &gt; EXPIRATION_TIME);<a name="line.142"></a>
-<span class="sourceLineNo">143</span>  }<a name="line.143"></a>
-<span class="sourceLineNo">144</span>  <a name="line.144"></a>
-<span class="sourceLineNo">145</span><a name="line.145"></a>
-<span class="sourceLineNo">146</span>  public void dumpAsText(PrintWriter out) 
{<a name="line.146"></a>
-<span class="sourceLineNo">147</span>    long now = 
System.currentTimeMillis();<a name="line.147"></a>
-<span class="sourceLineNo">148</span>    <a name="line.148"></a>
-<span class="sourceLineNo">149</span>    List&lt;MonitoredTask&gt; tasks = 
getTasks();<a name="line.149"></a>
-<span class="sourceLineNo">150</span>    for (MonitoredTask task : tasks) {<a 
name="line.150"></a>
-<span class="sourceLineNo">151</span>      out.println("Task: " + 
task.getDescription());<a name="line.151"></a>
-<span class="sourceLineNo">152</span>      out.println("Status: " + 
task.getState() + ":" + task.getStatus());<a name="line.152"></a>
-<span class="sourceLineNo">153</span>      long running = (now - 
task.getStartTime())/1000;<a name="line.153"></a>
-<span class="sourceLineNo">154</span>      if (task.getCompletionTimestamp() 
!= -1) {<a name="line.154"></a>
-<span class="sourceLineNo">155</span>        long completed = (now - 
task.getCompletionTimestamp()) / 1000;<a name="line.155"></a>
-<span class="sourceLineNo">156</span>        out.println("Completed " + 
completed + "s ago");<a name="line.156"></a>
-<span class="sourceLineNo">157</span>        out.println("Ran for " +<a 
name="line.157"></a>
-<span class="sourceLineNo">158</span>            
(task.getCompletionTimestamp() - task.getStartTime())/1000<a 
name="line.158"></a>
-<span class="sourceLineNo">159</span>            + "s");<a name="line.159"></a>
-<span class="sourceLineNo">160</span>      } else {<a name="line.160"></a>
-<span class="sourceLineNo">161</span>        out.println("Running for " + 
running + "s");<a name="line.161"></a>
-<span class="sourceLineNo">162</span>      }<a name="line.162"></a>
-<span class="sourceLineNo">163</span>      out.println();<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>  /**<a name="line.167"></a>
-<span class="sourceLineNo">168</span>   * This class encapsulates an object as 
well as a weak reference to a proxy<a name="line.168"></a>
-<span class="sourceLineNo">169</span>   * that passes through calls to that 
object. In art form:<a name="line.169"></a>
-<span class="sourceLineNo">170</span>   * &lt;pre&gt;<a name="line.170"></a>
-<span class="sourceLineNo">171</span>   *     Proxy  &lt;------------------<a 
name="line.171"></a>
-<span class="sourceLineNo">172</span>   *       |                       \<a 
name="line.172"></a>
-<span class="sourceLineNo">173</span>   *       v                        \<a 
name="line.173"></a>
-<span class="sourceLineNo">174</span>   * PassthroughInvocationHandler   |  
weak reference<a name="line.174"></a>
-<span class="sourceLineNo">175</span>   *       |                       /<a 
name="line.175"></a>
-<span class="sourceLineNo">176</span>   * MonitoredTaskImpl            / <a 
name="line.176"></a>
-<span class="sourceLineNo">177</span>   *       |                     /<a 
name="line.177"></a>
-<span class="sourceLineNo">178</span>   * StatAndWeakRefProxy  ------/<a 
name="line.178"></a>
-<span class="sourceLineNo">179</span>   * &lt;/pre&gt;<a name="line.179"></a>
-<span class="sourceLineNo">180</span>   * Since we only return the Proxy to 
the creator of the MonitorableStatus,<a name="line.180"></a>
-<span class="sourceLineNo">181</span>   * this means that they can leak that 
object, and we'll detect it<a name="line.181"></a>
-<span class="sourceLineNo">182</span>   * since our weak reference will go 
null. But, we still have the actual<a name="line.182"></a>
-<span class="sourceLineNo">183</span>   * object, so we can log it and display 
it as a leaked (incomplete) action.<a name="line.183"></a>
-<span class="sourceLineNo">184</span>   */<a name="line.184"></a>
-<span class="sourceLineNo">185</span>  private static class TaskAndWeakRefPair 
{<a name="line.185"></a>
-<span class="sourceLineNo">186</span>    private MonitoredTask impl;<a 
name="line.186"></a>
-<span class="sourceLineNo">187</span>    private 
WeakReference&lt;MonitoredTask&gt; weakProxy;<a name="line.187"></a>
-<span class="sourceLineNo">188</span>    <a name="line.188"></a>
-<span class="sourceLineNo">189</span>    public 
TaskAndWeakRefPair(MonitoredTask stat,<a name="line.189"></a>
-<span class="sourceLineNo">190</span>        MonitoredTask proxy) {<a 
name="line.190"></a>
-<span class="sourceLineNo">191</span>      this.impl = stat;<a 
name="line.191"></a>
-<span class="sourceLineNo">192</span>      this.weakProxy = new 
WeakReference&lt;&gt;(proxy);<a name="line.192"></a>
-<span class="sourceLineNo">193</span>    }<a name="line.193"></a>
-<span class="sourceLineNo">194</span>    <a name="line.194"></a>
-<span class="sourceLineNo">195</span>    public MonitoredTask get() {<a 
name="line.195"></a>
-<span class="sourceLineNo">196</span>      return impl;<a name="line.196"></a>
-<span class="sourceLineNo">197</span>    }<a name="line.197"></a>
-<span class="sourceLineNo">198</span>    <a name="line.198"></a>
-<span class="sourceLineNo">199</span>    public boolean isDead() {<a 
name="line.199"></a>
-<span class="sourceLineNo">200</span>      return weakProxy.get() == null;<a 
name="line.200"></a>
+<span class="sourceLineNo">033</span>import 
org.apache.hadoop.conf.Configuration;<a name="line.33"></a>
+<span class="sourceLineNo">034</span>import 
org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import 
org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import 
org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.36"></a>
+<span class="sourceLineNo">037</span>import 
org.apache.hadoop.hbase.util.Threads;<a name="line.37"></a>
+<span class="sourceLineNo">038</span><a name="line.38"></a>
+<span class="sourceLineNo">039</span>import 
org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a 
name="line.39"></a>
+<span class="sourceLineNo">040</span><a name="line.40"></a>
+<span class="sourceLineNo">041</span>/**<a name="line.41"></a>
+<span class="sourceLineNo">042</span> * Singleton which keeps track of tasks 
going on in this VM.<a name="line.42"></a>
+<span class="sourceLineNo">043</span> * A Task here is anything which takes 
more than a few seconds<a name="line.43"></a>
+<span class="sourceLineNo">044</span> * and the user might want to inquire 
about the status<a name="line.44"></a>
+<span class="sourceLineNo">045</span> */<a name="line.45"></a>
+<span class="sourceLineNo">046</span>@InterfaceAudience.Private<a 
name="line.46"></a>
+<span class="sourceLineNo">047</span>public class TaskMonitor {<a 
name="line.47"></a>
+<span class="sourceLineNo">048</span>  private static final Log LOG = 
LogFactory.getLog(TaskMonitor.class);<a name="line.48"></a>
+<span class="sourceLineNo">049</span><a name="line.49"></a>
+<span class="sourceLineNo">050</span>  public static final String 
MAX_TASKS_KEY = "hbase.taskmonitor.max.tasks";<a name="line.50"></a>
+<span class="sourceLineNo">051</span>  public static final int 
DEFAULT_MAX_TASKS = 1000;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>  public static final String 
RPC_WARN_TIME_KEY = "hbase.taskmonitor.rpc.warn.time";<a name="line.52"></a>
+<span class="sourceLineNo">053</span>  public static final long 
DEFAULT_RPC_WARN_TIME = 0;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>  public static final String 
EXPIRATION_TIME_KEY = "hbase.taskmonitor.expiration.time";<a name="line.54"></a>
+<span class="sourceLineNo">055</span>  public static final long 
DEFAULT_EXPIRATION_TIME = 60*1000;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>  public static final String 
MONITOR_INTERVAL_KEY = "hbase.taskmonitor.monitor.interval";<a 
name="line.56"></a>
+<span class="sourceLineNo">057</span>  public static final long 
DEFAULT_MONITOR_INTERVAL = 10*1000;<a name="line.57"></a>
+<span class="sourceLineNo">058</span><a name="line.58"></a>
+<span class="sourceLineNo">059</span>  private static TaskMonitor instance;<a 
name="line.59"></a>
+<span class="sourceLineNo">060</span><a name="line.60"></a>
+<span class="sourceLineNo">061</span>  private final int maxTasks;<a 
name="line.61"></a>
+<span class="sourceLineNo">062</span>  private final long rpcWarnTime;<a 
name="line.62"></a>
+<span class="sourceLineNo">063</span>  private final long expirationTime;<a 
name="line.63"></a>
+<span class="sourceLineNo">064</span>  private final CircularFifoBuffer 
tasks;<a name="line.64"></a>
+<span class="sourceLineNo">065</span>  private final 
List&lt;TaskAndWeakRefPair&gt; rpcTasks;<a name="line.65"></a>
+<span class="sourceLineNo">066</span>  private final long monitorInterval;<a 
name="line.66"></a>
+<span class="sourceLineNo">067</span>  private Thread monitorThread;<a 
name="line.67"></a>
+<span class="sourceLineNo">068</span><a name="line.68"></a>
+<span class="sourceLineNo">069</span>  TaskMonitor(Configuration conf) {<a 
name="line.69"></a>
+<span class="sourceLineNo">070</span>    maxTasks = conf.getInt(MAX_TASKS_KEY, 
DEFAULT_MAX_TASKS);<a name="line.70"></a>
+<span class="sourceLineNo">071</span>    expirationTime = 
conf.getLong(EXPIRATION_TIME_KEY, DEFAULT_EXPIRATION_TIME);<a 
name="line.71"></a>
+<span class="sourceLineNo">072</span>    rpcWarnTime = 
conf.getLong(RPC_WARN_TIME_KEY, DEFAULT_RPC_WARN_TIME);<a name="line.72"></a>
+<span class="sourceLineNo">073</span>    tasks = new 
CircularFifoBuffer(maxTasks);<a name="line.73"></a>
+<span class="sourceLineNo">074</span>    rpcTasks = Lists.newArrayList();<a 
name="line.74"></a>
+<span class="sourceLineNo">075</span>    monitorInterval = 
conf.getLong(MONITOR_INTERVAL_KEY, DEFAULT_MONITOR_INTERVAL);<a 
name="line.75"></a>
+<span class="sourceLineNo">076</span>    monitorThread = new Thread(new 
MonitorRunnable());<a name="line.76"></a>
+<span class="sourceLineNo">077</span>    
Threads.setDaemonThreadRunning(monitorThread, "Monitor thread for 
TaskMonitor");<a name="line.77"></a>
+<span class="sourceLineNo">078</span>  }<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>   * Get singleton instance.<a 
name="line.81"></a>
+<span class="sourceLineNo">082</span>   * TODO this would be better off scoped 
to a single daemon<a name="line.82"></a>
+<span class="sourceLineNo">083</span>   */<a name="line.83"></a>
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+<span class="sourceLineNo">090</span>  <a name="line.90"></a>
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createStatus(String description) {<a name="line.91"></a>
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MonitoredTaskImpl();<a name="line.92"></a>
+<span class="sourceLineNo">093</span>    stat.setDescription(description);<a 
name="line.93"></a>
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Proxy.newProxyInstance(<a name="line.94"></a>
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stat.getClass().getClassLoader(),<a name="line.95"></a>
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MonitoredTask.class },<a name="line.96"></a>
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PassthroughInvocationHandler&lt;&gt;(stat));<a name="line.97"></a>
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TaskAndWeakRefPair(stat, proxy);<a name="line.98"></a>
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name="line.100"></a>
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name="line.102"></a>
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+<span class="sourceLineNo">104</span>  }<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
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createRPCStatus(String description) {<a name="line.106"></a>
+<span class="sourceLineNo">107</span>    MonitoredRPCHandler stat = new 
MonitoredRPCHandlerImpl();<a name="line.107"></a>
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name="line.108"></a>
+<span class="sourceLineNo">109</span>    MonitoredRPCHandler proxy = 
(MonitoredRPCHandler) Proxy.newProxyInstance(<a name="line.109"></a>
+<span class="sourceLineNo">110</span>        
stat.getClass().getClassLoader(),<a name="line.110"></a>
+<span class="sourceLineNo">111</span>        new Class&lt;?&gt;[] { 
MonitoredRPCHandler.class },<a name="line.111"></a>
+<span class="sourceLineNo">112</span>        new 
PassthroughInvocationHandler&lt;&gt;(stat));<a name="line.112"></a>
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TaskAndWeakRefPair(stat, proxy);<a name="line.113"></a>
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name="line.114"></a>
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+<span class="sourceLineNo">117</span><a name="line.117"></a>
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warnStuckTasks() {<a name="line.118"></a>
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EnvironmentEdgeManager.currentTime();<a name="line.120"></a>
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name="line.121"></a>
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name="line.122"></a>
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it.next();<a name="line.123"></a>
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pair.get();<a name="line.124"></a>
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+ rpcWarnTime)) {<a name="line.126"></a>
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name="line.128"></a>
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+<span class="sourceLineNo">131</span>    }<a name="line.131"></a>
+<span class="sourceLineNo">132</span>  }<a name="line.132"></a>
+<span class="sourceLineNo">133</span><a name="line.133"></a>
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purgeExpiredTasks() {<a name="line.134"></a>
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(Iterator&lt;TaskAndWeakRefPair&gt; it = tasks.iterator();<a 
name="line.135"></a>
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name="line.136"></a>
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name="line.140"></a>
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leaked it. So we can<a name="line.141"></a>
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+<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><a name="line.154"></a>
+<span class="sourceLineNo">155</span>  /**<a name="line.155"></a>
+<span class="sourceLineNo">156</span>   * Produces a list containing copies of 
the current state of all non-expired <a name="line.156"></a>
+<span class="sourceLineNo">157</span>   * MonitoredTasks handled by this 
TaskMonitor.<a name="line.157"></a>
+<span class="sourceLineNo">158</span>   * @return A complete list of 
MonitoredTasks.<a name="line.158"></a>
+<span class="sourceLineNo">159</span>   */<a name="line.159"></a>
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List&lt;MonitoredTask&gt; getTasks() {<a name="line.160"></a>
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Lists.newArrayListWithCapacity(tasks.size() + rpcTasks.size());<a 
name="line.162"></a>
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(Iterator&lt;TaskAndWeakRefPair&gt; it = tasks.iterator();<a 
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stat.getCompletionTimestamp();<a name="line.179"></a>
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name="line.187"></a>
+<span class="sourceLineNo">188</span>      out.println("Task: " + 
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+<span class="sourceLineNo">193</span>        out.println("Completed " + 
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+<span class="sourceLineNo">194</span>        out.println("Ran for " +<a 
name="line.194"></a>
+<span class="sourceLineNo">195</span>            
(task.getCompletionTimestamp() - task.getStartTime())/1000<a 
name="line.195"></a>
+<span class="sourceLineNo">196</span>            + "s");<a name="line.196"></a>
+<span class="sourceLineNo">197</span>      } else {<a name="line.197"></a>
+<span class="sourceLineNo">198</span>        out.println("Running for " + 
running + "s");<a name="line.198"></a>
+<span class="sourceLineNo">199</span>      }<a name="line.199"></a>
+<span class="sourceLineNo">200</span>      out.println();<a 
name="line.200"></a>
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passes through calls to the original <a name="line.205"></a>
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PassthroughInvocationHandler&lt;T&gt; implements InvocationHandler {<a 
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name="line.209"></a>
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-<span class="sourceLineNo">221</span>}<a name="line.221"></a>
+<span class="sourceLineNo">203</span><a name="line.203"></a>
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name="line.204"></a>
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+<span class="sourceLineNo">208</span>  }<a name="line.208"></a>
+<span class="sourceLineNo">209</span><a name="line.209"></a>
+<span class="sourceLineNo">210</span>  /**<a name="line.210"></a>
+<span class="sourceLineNo">211</span>   * This class encapsulates an object as 
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+<span class="sourceLineNo">212</span>   * that passes through calls to that 
object. In art form:<a name="line.212"></a>
+<span class="sourceLineNo">213</span>   * &lt;pre&gt;<a name="line.213"></a>
+<span class="sourceLineNo">214</span>   *     Proxy  &lt;------------------<a 
name="line.214"></a>
+<span class="sourceLineNo">215</span>   *       |                       \<a 
name="line.215"></a>
+<span class="sourceLineNo">216</span>   *       v                        \<a 
name="line.216"></a>
+<span class="sourceLineNo">217</span>   * PassthroughInvocationHandler   |  
weak reference<a name="line.217"></a>
+<span class="sourceLineNo">218</span>   *       |                       /<a 
name="line.218"></a>
+<span class="sourceLineNo">219</span>   * MonitoredTaskImpl            / <a 
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+<span class="sourceLineNo">220</span>   *       |                     /<a 
name="line.220"></a>
+<span class="sourceLineNo">221</span>   * StatAndWeakRefProxy  ------/<a 
name="line.221"></a>
+<span class="sourceLineNo">222</span>   * &lt;/pre&gt;<a name="line.222"></a>
+<span class="sourceLineNo">223</span>   * Since we only return the Proxy to 
the creator of the MonitorableStatus,<a name="line.223"></a>
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object, and we'll detect it<a name="line.224"></a>
+<span class="sourceLineNo">225</span>   * since our weak reference will go 
null. But, we still have the actual<a name="line.225"></a>
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it as a leaked (incomplete) action.<a name="line.226"></a>
+<span class="sourceLineNo">227</span>   */<a name="line.227"></a>
+<span class="sourceLineNo">228</span>  private static class TaskAndWeakRefPair 
{<a name="line.228"></a>
+<span class="sourceLineNo">229</span>    private MonitoredTask impl;<a 
name="line.229"></a>
+<span class="sourceLineNo">230</span>    private 
WeakReference&lt;MonitoredTask&gt; weakProxy;<a name="line.230"></a>
+<span class="sourceLineNo">231</span>    <a name="line.231"></a>
+<span class="sourceLineNo">232</span>    public 
TaskAndWeakRefPair(MonitoredTask stat,<a name="line.232"></a>
+<span class="sourceLineNo">233</span>        MonitoredTask proxy) {<a 
name="line.233"></a>
+<span class="sourceLineNo">234</span>      this.impl = stat;<a 
name="line.234"></a>
+<span class="sourceLineNo">235</span>      this.weakProxy = new 
WeakReference&lt;&gt;(proxy);<a name="line.235"></a>
+<span class="sourceLineNo">236</span>    }<a name="line.236"></a>
+<span class="sourceLineNo">237</span>    <a name="line.237"></a>
+<span class="sourceLineNo">238</span>    public MonitoredTask get() {<a 
name="line.238"></a>
+<span class="sourceLineNo">239</span>      return impl;<a name="line.239"></a>
+<span class="sourceLineNo">240</span>    }<a name="line.240"></a>
+<span class="sourceLineNo">241</span>    <a name="line.241"></a>
+<span class="sourceLineNo">242</span>    public boolean isDead() {<a 
name="line.242"></a>
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+<span class="sourceLineNo">245</span>  }<a name="line.245"></a>
+<span class="sourceLineNo">246</span>  <a name="line.246"></a>
+<span class="sourceLineNo">247</span>  /**<a name="line.247"></a>
+<span class="sourceLineNo">248</span>   * An InvocationHandler that simply 
passes through calls to the original <a name="line.248"></a>
+<span class="sourceLineNo">249</span>   * object.<a name="line.249"></a>
+<span class="sourceLineNo">250</span>   */<a name="line.250"></a>
+<span class="sourceLineNo">251</span>  private static class 
PassthroughInvocationHandler&lt;T&gt; implements InvocationHandler {<a 
name="line.251"></a>
+<span class="sourceLineNo">252</span>    private T delegatee;<a 
name="line.252"></a>
+<span class="sourceLineNo">253</span>    <a name="line.253"></a>
+<span class="sourceLineNo">254</span>    public PassthroughInvocationHandler(T 
delegatee) {<a name="line.254"></a>
+<span class="sourceLineNo">255</span>      this.delegatee = delegatee;<a 
name="line.255"></a>
+<span class="sourceLineNo">256</span>    }<a name="line.256"></a>
+<span class="sourceLineNo">257</span><a name="line.257"></a>
+<span class="sourceLineNo">258</span>    @Override<a name="line.258"></a>
+<span class="sourceLineNo">259</span>    public Object invoke(Object proxy, 
Method method, Object[] args)<a name="line.259"></a>
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name="line.260"></a>
+<span class="sourceLineNo">261</span>      return method.invoke(delegatee, 
args);<a name="line.261"></a>
+<span class="sourceLineNo">262</span>    }    <a name="line.262"></a>
+<span class="sourceLineNo">263</span>  }<a name="line.263"></a>
+<span class="sourceLineNo">264</span><a name="line.264"></a>
+<span class="sourceLineNo">265</span>  private class MonitorRunnable 
implements Runnable {<a name="line.265"></a>
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+<span class="sourceLineNo">267</span><a name="line.267"></a>
+<span class="sourceLineNo">268</span>    @Override<a name="line.268"></a>
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+<span class="sourceLineNo">270</span>      while (running) {<a 
name="line.270"></a>
+<span class="sourceLineNo">271</span>        try {<a name="line.271"></a>
+<span class="sourceLineNo">272</span>          
Thread.sleep(monitorInterval);<a name="line.272"></a>
+<span class="sourceLineNo">273</span>          if (tasks.isFull()) {<a 
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+<span class="sourceLineNo">274</span>            purgeExpiredTasks();<a 
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+<span class="sourceLineNo">275</span>          }<a name="line.275"></a>
+<span class="sourceLineNo">276</span>          warnStuckTasks();<a 
name="line.276"></a>
+<span class="sourceLineNo">277</span>        } catch (InterruptedException e) 
{<a name="line.277"></a>
+<span class="sourceLineNo">278</span>          running = false;<a 
name="line.278"></a>
+<span class="sourceLineNo">279</span>        }<a name="line.279"></a>
+<span class="sourceLineNo">280</span>      }<a name="line.280"></a>
+<span class="sourceLineNo">281</span>    }<a name="line.281"></a>
+<span class="sourceLineNo">282</span>  }<a name="line.282"></a>
+<span class="sourceLineNo">283</span>}<a name="line.283"></a>
 
 
 

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