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Executors (Guava Libraries 2010.01.04)
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<H2>

com.google.common.util.concurrent
 
Class Executors</H2>
<PRE>
<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
 <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by ">com.google.common.util.concurrent.Executors
</PRE>
<HR>
<DL>
<DT><PRE>public class Executors<DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>

Factory and utility methods for <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executor.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>Executor</CODE></A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ExecutorService</CODE></A>, and <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A>.

<DL>
<DT>Since:</DT>
 <DD>2009.09.15 tentative</DD>
<DT>Author:</DT>
 <DD>Eric Fellheimer, Kyle Littlefield, Justin Mahoney</DD>
</DL>
<HR>

<A NAME="constructor_summary"></A>
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Constructor Summary</TH>
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<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#Executors()">Executors</A>()</CODE>

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Method Summary</TH>
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<CODE>static void</CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#addDelayedShutdownHook(java.util.concurrent.ExecutorService, long, java.util.concurrent.TimeUnit)">addDelayedShutdownHook</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> service,
 long terminationTimeout,
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A> timeUnit)</CODE>

Add a shutdown hook to wait for thread completion in the given
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>service</CODE></A>.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A></CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#daemonThreadFactory()">daemonThreadFactory</A>()</CODE>

Returns a <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> which creates daemon threads.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A></CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#daemonThreadFactory(java.util.concurrent.ThreadFactory)">daemonThreadFactory</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A> factory)</CODE>

Wraps another <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A>, making all new threads daemon threads.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A></CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor)">getExitingExecutorService</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A> executor)</CODE>

Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A></CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor, long, java.util.concurrent.TimeUnit)">getExitingExecutorService</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A> executor,
 long terminationTimeout,
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A> timeUnit)</CODE>

Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A></CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor)">getExitingScheduledExecutorService</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A> executor)</CODE>

Converts the given ThreadPoolExecutor into a ScheduledExecutorService that
 exits when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A></CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor, long, java.util.concurrent.TimeUnit)">getExitingScheduledExecutorService</A>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A> executor,
 long terminationTimeout,
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A> timeUnit)</CODE>

Converts the given ScheduledThreadPoolExecutor into a
 ScheduledExecutorService that exits when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A></CODE></TD>
<TD><CODE><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#sameThreadExecutor()">sameThreadExecutor</A>()</CODE>

Creates an executor service that runs each task in the thread
 that invokes <code>execute/submit</code>, as in <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.CallerRunsPolicy.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadPoolExecutor.CallerRunsPolicy</CODE></A> This
 applies both to individually submitted tasks and to collections of tasks
 submitted via <code>invokeAll</code> or <code>invokeAny</code>.</TD>
</TR>
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<TH ALIGN="left">Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></TH>
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Constructor Detail</TH>
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</TABLE>

<A NAME="Executors()"></A><H3>
Executors</H3>
<PRE>
public Executors()</PRE>
<DL>
</DL>

<A NAME="method_detail"></A>
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<A NAME="getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor, long, java.util.concurrent.TimeUnit)"></A><H3>
getExitingExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> getExitingExecutorService(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A> executor,
 long terminationTimeout,
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A> timeUnit)</PRE>
<DL>
<DD>Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete. It does so by using daemon threads and
 adding a shutdown hook to wait for their completion.

This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newFixedThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newFixedThreadPool(int)</CODE></A>.

<DD><DL>
<DT>Parameters:<DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
 application is finished<DD><CODE>terminationTimeout</CODE> - how long to wait for the executor to
 finish before terminating the JVM<DD><CODE>timeUnit</CODE> - unit of time for the time parameter
<DT>Returns:<DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor, long, java.util.concurrent.TimeUnit)"></A><H3>
getExitingScheduledExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A> getExitingScheduledExecutorService(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A> executor,
 long terminationTimeout,
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A> timeUnit)</PRE>
<DL>
<DD>Converts the given ScheduledThreadPoolExecutor into a
 ScheduledExecutorService that exits when the application is complete. It
 does so by using daemon threads and adding a shutdown hook to wait for
 their completion.

This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newScheduledThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newScheduledThreadPool(int)</CODE></A>.

<DD><DL>
<DT>Parameters:<DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
 application is finished<DD><CODE>terminationTimeout</CODE> - how long to wait for the executor to
 finish before terminating the JVM<DD><CODE>timeUnit</CODE> - unit of time for the time parameter
<DT>Returns:<DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="addDelayedShutdownHook(java.util.concurrent.ExecutorService, long, java.util.concurrent.TimeUnit)"></A><H3>
addDelayedShutdownHook</H3>
<PRE>
public static void addDelayedShutdownHook(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> service,
 long terminationTimeout,
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A> timeUnit)</PRE>
<DL>
<DD>Add a shutdown hook to wait for thread completion in the given
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>service</CODE></A>. This is useful if the given service uses
 daemon threads, and we want to keep the JVM from exiting immediately on
 shutdown, instead giving these daemon threads a chance to terminate
 normally.

<DD><DL>
<DT>Parameters:<DD><CODE>service</CODE> - ExecutorService which uses daemon threads<DD><CODE>terminationTimeout</CODE> - how long to wait for the executor to finish
 before terminating the JVM<DD><CODE>timeUnit</CODE> - unit of time for the time parameter</DL>
</DD>
</DL>
<HR>

<A NAME="getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor)"></A><H3>
getExitingExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> getExitingExecutorService(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A> executor)</PRE>
<DL>
<DD>Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete. It does so by using daemon threads and
 adding a shutdown hook to wait for their completion.

This method waits 120 seconds before continuing with JVM termination,
 even if the executor has not finished its work.

This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newFixedThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newFixedThreadPool(int)</CODE></A>.

<DD><DL>
<DT>Parameters:<DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
 application is finished
<DT>Returns:<DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor)"></A><H3>
getExitingScheduledExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A> getExitingScheduledExecutorService(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A> executor)</PRE>
<DL>
<DD>Converts the given ThreadPoolExecutor into a ScheduledExecutorService that
 exits when the application is complete. It does so by using daemon threads
 and adding a shutdown hook to wait for their completion.

This method waits 120 seconds before continuing with JVM termination,
 even if the executor has not finished its work.

This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newScheduledThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newScheduledThreadPool(int)</CODE></A>.

<DD><DL>
<DT>Parameters:<DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
 application is finished
<DT>Returns:<DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="daemonThreadFactory()"></A><H3>
daemonThreadFactory</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A> daemonThreadFactory()</PRE>
<DL>
<DD>Returns a <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> which creates daemon threads. This is
 implemented by wrapping <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#defaultThreadFactory()" title="class or interface in java.util.concurrent"><CODE>Executors.defaultThreadFactory()</CODE></A>, marking all new
 threads as daemon threads

<DD><DL>

<DT>Returns:<DD>a <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> which creates daemon threads</DL>
</DD>
</DL>
<HR>

<A NAME="daemonThreadFactory(java.util.concurrent.ThreadFactory)"></A><H3>
daemonThreadFactory</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A> daemonThreadFactory(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A> factory)</PRE>
<DL>
<DD>Wraps another <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A>, making all new threads daemon threads.

<DD><DL>
<DT>Parameters:<DD><CODE>factory</CODE> - the <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> used to generate new threads
<DT>Returns:<DD>a new <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> backed by <code>factory</code> whose created
 threads are all daemon threads</DL>
</DD>
</DL>
<HR>

<A NAME="sameThreadExecutor()"></A><H3>
sameThreadExecutor</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> sameThreadExecutor()</PRE>
<DL>
<DD>Creates an executor service that runs each task in the thread
 that invokes <code>execute/submit</code>, as in <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.CallerRunsPolicy.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadPoolExecutor.CallerRunsPolicy</CODE></A> This
 applies both to individually submitted tasks and to collections of tasks
 submitted via <code>invokeAll</code> or <code>invokeAny</code>. In the latter case,
 tasks will run serially on the calling thread. Tasks are run to
 completion before a <code>Future</code> is returned to the caller (unless the
 executor has been shutdown).

Although all tasks are immediately executed in the thread that
 submitted the task, this <code>ExecutorService</code> imposes a small
 locking overhead on each task submission in order to implement shutdown
 and termination behavior.

The implementation deviates from the <code>ExecutorService</code>
 specification with regards to the <code>shutdownNow</code> method. First,
 "best-effort" with regards to canceling running tasks is implemented
 as "no-effort". No interrupts or other attempts are made to stop
 threads executing tasks. Second, the returned list will always be empty,
 as any submitted task is considered to have started execution.
 This applies also to tasks given to <code>invokeAll</code> or <code>invokeAny</code>
 which are pending serial execution, even the subset of the tasks that
 have not yet started execution. It is unclear from the
 <code>ExecutorService</code> specification if these should be included, and
 it's much easier to implement the interpretation that they not be.
 Finally, a call to <code>shutdown</code> or <code>shutdownNow</code> may result
 in concurrent calls to <code>invokeAll/invokeAny</code> throwing
 RejectedExecutionException, although a subset of the tasks may already
 have been executed.

<DD><DL>
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com.google.common.util.concurrent</FONT>
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Class Executors</H2>
<PRE>
<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
  <IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>com.google.common.util.concurrent.Executors</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>Executors</B><DT>extends <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></DL>
</PRE>

<P>
Factory and utility methods for <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executor.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>Executor</CODE></A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ExecutorService</CODE></A>, and <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A>.
<P>

<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>2009.09.15 <b>tentative</b></DD>
<DT><B>Author:</B></DT>
  <DD>Eric Fellheimer, Kyle Littlefield, Justin Mahoney</DD>
</DL>
<HR>

<P>

<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#Executors()">Executors</A></B>()</CODE>

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#addDelayedShutdownHook(java.util.concurrent.ExecutorService, long, java.util.concurrent.TimeUnit)">addDelayedShutdownHook</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A>&nbsp;service,
                       long&nbsp;terminationTimeout,
                       <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;timeUnit)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Add a shutdown hook to wait for thread completion in the given
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>service</CODE></A>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#daemonThreadFactory()">daemonThreadFactory</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns a <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> which creates daemon threads.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#daemonThreadFactory(java.util.concurrent.ThreadFactory)">daemonThreadFactory</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A>&nbsp;factory)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Wraps another <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A>, making all new threads daemon threads.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor)">getExitingExecutorService</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A>&nbsp;executor)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor, long, java.util.concurrent.TimeUnit)">getExitingExecutorService</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A>&nbsp;executor,
                          long&nbsp;terminationTimeout,
                          <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;timeUnit)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor)">getExitingScheduledExecutorService</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A>&nbsp;executor)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Converts the given ThreadPoolExecutor into a ScheduledExecutorService that
 exits when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor, long, java.util.concurrent.TimeUnit)">getExitingScheduledExecutorService</A></B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A>&nbsp;executor,
                                   long&nbsp;terminationTimeout,
                                   <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;timeUnit)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Converts the given ScheduledThreadPoolExecutor into a
 ScheduledExecutorService that exits when the application is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/Executors.html#sameThreadExecutor()">sameThreadExecutor</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Creates an executor service that runs each task in the thread
 that invokes <code>execute/submit</code>, as in <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.CallerRunsPolicy.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadPoolExecutor.CallerRunsPolicy</CODE></A>  This
 applies both to individually submitted tasks and to collections of tasks
 submitted via <code>invokeAll</code> or <code>invokeAny</code>.</TD>
</TR>
</TABLE>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
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<A NAME="Executors()"><!-- --></A><H3>
Executors</H3>
<PRE>
public <B>Executors</B>()</PRE>
<DL>
</DL>

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<A NAME="getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor, long, java.util.concurrent.TimeUnit)"><!-- --></A><H3>
getExitingExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> <B>getExitingExecutorService</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A>&nbsp;executor,
                                                        long&nbsp;terminationTimeout,
                                                        <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;timeUnit)</PRE>
<DL>
<DD>Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete.  It does so by using daemon threads and
 adding a shutdown hook to wait for their completion.

 <p>This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newFixedThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newFixedThreadPool(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
        application is finished<DD><CODE>terminationTimeout</CODE> - how long to wait for the executor to
        finish before terminating the JVM<DD><CODE>timeUnit</CODE> - unit of time for the time parameter
<DT><B>Returns:</B><DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor, long, java.util.concurrent.TimeUnit)"><!-- --></A><H3>
getExitingScheduledExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A> <B>getExitingScheduledExecutorService</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A>&nbsp;executor,
                                                                          long&nbsp;terminationTimeout,
                                                                          <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;timeUnit)</PRE>
<DL>
<DD>Converts the given ScheduledThreadPoolExecutor into a
 ScheduledExecutorService that exits when the application is complete.  It
 does so by using daemon threads and adding a shutdown hook to wait for
 their completion.

 <p>This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newScheduledThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newScheduledThreadPool(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
        application is finished<DD><CODE>terminationTimeout</CODE> - how long to wait for the executor to
        finish before terminating the JVM<DD><CODE>timeUnit</CODE> - unit of time for the time parameter
<DT><B>Returns:</B><DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="addDelayedShutdownHook(java.util.concurrent.ExecutorService, long, java.util.concurrent.TimeUnit)"><!-- --></A><H3>
addDelayedShutdownHook</H3>
<PRE>
public static void <B>addDelayedShutdownHook</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A>&nbsp;service,
                                          long&nbsp;terminationTimeout,
                                          <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/TimeUnit.html?is-external=true" title="class or interface in java.util.concurrent">TimeUnit</A>&nbsp;timeUnit)</PRE>
<DL>
<DD>Add a shutdown hook to wait for thread completion in the given
 <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>service</CODE></A>.  This is useful if the given service uses
 daemon threads, and we want to keep the JVM from exiting immediately on
 shutdown, instead giving these daemon threads a chance to terminate
 normally.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>service</CODE> - ExecutorService which uses daemon threads<DD><CODE>terminationTimeout</CODE> - how long to wait for the executor to finish
        before terminating the JVM<DD><CODE>timeUnit</CODE> - unit of time for the time parameter</DL>
</DD>
</DL>
<HR>

<A NAME="getExitingExecutorService(java.util.concurrent.ThreadPoolExecutor)"><!-- --></A><H3>
getExitingExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> <B>getExitingExecutorService</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ThreadPoolExecutor</A>&nbsp;executor)</PRE>
<DL>
<DD>Converts the given ThreadPoolExecutor into an ExecutorService that exits
 when the application is complete.  It does so by using daemon threads and
 adding a shutdown hook to wait for their completion.

 <p>This method waits 120 seconds before continuing with JVM termination,
 even if the executor has not finished its work.

 <p>This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newFixedThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newFixedThreadPool(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
        application is finished
<DT><B>Returns:</B><DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="getExitingScheduledExecutorService(java.util.concurrent.ScheduledThreadPoolExecutor)"><!-- --></A><H3>
getExitingScheduledExecutorService</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledExecutorService</A> <B>getExitingScheduledExecutorService</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ScheduledThreadPoolExecutor.html?is-external=true" title="class or interface in java.util.concurrent">ScheduledThreadPoolExecutor</A>&nbsp;executor)</PRE>
<DL>
<DD>Converts the given ThreadPoolExecutor into a ScheduledExecutorService that
 exits when the application is complete.  It does so by using daemon threads
 and adding a shutdown hook to wait for their completion.

 <p>This method waits 120 seconds before continuing with JVM termination,
 even if the executor has not finished its work.

 <p>This is mainly for fixed thread pools.
 See <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#newScheduledThreadPool(int)" title="class or interface in java.util.concurrent"><CODE>Executors.newScheduledThreadPool(int)</CODE></A>.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>executor</CODE> - the executor to modify to make sure it exits when the
        application is finished
<DT><B>Returns:</B><DD>an unmodifiable version of the input which will not hang the JVM</DL>
</DD>
</DL>
<HR>

<A NAME="daemonThreadFactory()"><!-- --></A><H3>
daemonThreadFactory</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A> <B>daemonThreadFactory</B>()</PRE>
<DL>
<DD>Returns a <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> which creates daemon threads. This is
 implemented by wrapping <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executors.html?is-external=true#defaultThreadFactory()" title="class or interface in java.util.concurrent"><CODE>Executors.defaultThreadFactory()</CODE></A>, marking all new
 threads as daemon threads
<P>
<DD><DL>

<DT><B>Returns:</B><DD>a <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> which creates daemon threads</DL>
</DD>
</DL>
<HR>

<A NAME="daemonThreadFactory(java.util.concurrent.ThreadFactory)"><!-- --></A><H3>
daemonThreadFactory</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A> <B>daemonThreadFactory</B>(<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent">ThreadFactory</A>&nbsp;factory)</PRE>
<DL>
<DD>Wraps another <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A>, making all new threads daemon threads.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>factory</CODE> - the <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> used to generate new threads
<DT><B>Returns:</B><DD>a new <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadFactory.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadFactory</CODE></A> backed by <code>factory</code> whose created
         threads are all daemon threads</DL>
</DD>
</DL>
<HR>

<A NAME="sameThreadExecutor()"><!-- --></A><H3>
sameThreadExecutor</H3>
<PRE>
public static <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutorService.html?is-external=true" title="class or interface in java.util.concurrent">ExecutorService</A> <B>sameThreadExecutor</B>()</PRE>
<DL>
<DD>Creates an executor service that runs each task in the thread
 that invokes <code>execute/submit</code>, as in <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ThreadPoolExecutor.CallerRunsPolicy.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ThreadPoolExecutor.CallerRunsPolicy</CODE></A>  This
 applies both to individually submitted tasks and to collections of tasks
 submitted via <code>invokeAll</code> or <code>invokeAny</code>.  In the latter case,
 tasks will run serially on the calling thread.  Tasks are run to
 completion before a <code>Future</code> is returned to the caller (unless the
 executor has been shutdown).

 <p>Although all tasks are immediately executed in the thread that
 submitted the task, this <code>ExecutorService</code> imposes a small
 locking overhead on each task submission in order to implement shutdown
 and termination behavior.

 <p>The implementation deviates from the <code>ExecutorService</code>
 specification with regards to the <code>shutdownNow</code> method.  First,
 "best-effort" with regards to canceling running tasks is implemented
 as "no-effort".  No interrupts or other attempts are made to stop
 threads executing tasks.  Second, the returned list will always be empty,
 as any submitted task is considered to have started execution.
 This applies also to tasks given to <code>invokeAll</code> or <code>invokeAny</code>
 which are pending serial execution, even the subset of the tasks that
 have not yet started execution.  It is unclear from the
 <code>ExecutorService</code> specification if these should be included, and
 it's much easier to implement the interpretation that they not be.
 Finally, a call to <code>shutdown</code> or <code>shutdownNow</code> may result
 in concurrent calls to <code>invokeAll/invokeAny</code> throwing
 RejectedExecutionException, although a subset of the tasks may already
 have been executed.
<P>
<DD><DL>
</DL>
</DD>
</DL>
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