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AbstractIdleService (Guava Libraries 2010.01.04)
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com.google.common.util.concurrent</FONT>
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Class AbstractIdleService</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.AbstractIdleService</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public abstract class <B>AbstractIdleService</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><DT>implements <A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></DL>
</PRE>

<P>
Base class for services that do not need a thread while "running"
 but may need one during startup and shutdown. Subclasses can
 implement <A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#startUp()"><CODE>startUp()</CODE></A> and <A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#shutDown()"><CODE>shutDown()</CODE></A> methods, each
 which run in a executor which by default uses a separate thread
 for each method.
<P>

<P>
<DL>
<DT><B>Since:</B></DT>
  <DD>2009.09.15 <b>tentative</b></DD>
<DT><B>Author:</B></DT>
  <DD>Chris Nokleberg</DD>
</DL>
<HR>

<P>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A></CODE></TD>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->

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

<BR>
&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>protected &nbsp;<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">Executor</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#executor(com.google.common.base.Service.State)">executor</A></B>(<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A>&nbsp;state)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the <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> that will be used to run this service.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#isRunning()">isRunning</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <code>true</code> if this service is <A HREF="../../../../../com/google/common/base/Service.State.html#RUNNING"><CODE>running</CODE></A>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected abstract &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#shutDown()">shutDown</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Stop the service.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A>&gt;</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#start()">start</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If the service state is <A HREF="../../../../../com/google/common/base/Service.State.html#NEW"><CODE>Service.State.NEW</CODE></A>, this initiates service startup
 and returns immediately.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#startAndWait()">startAndWait</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Initiates service startup (if necessary), returning once the service has
 finished starting.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected abstract &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#startUp()">startUp</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Start the service.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#state()">state</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the lifecycle state of the service.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A>&gt;</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#stop()">stop</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;If the service is <A HREF="../../../../../com/google/common/base/Service.State.html#STARTING"><CODE>Service.State.STARTING</CODE></A> or <A HREF="../../../../../com/google/common/base/Service.State.html#RUNNING"><CODE>Service.State.RUNNING</CODE></A>, this
 initiates service shutdown and returns immediately.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#stopAndWait()">stopAndWait</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Initiates service shutdown (if necessary), returning once the service has
 finished stopping.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../com/google/common/util/concurrent/AbstractIdleService.html#toString()">toString</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</TD>
</TR>
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<!-- ========= CONSTRUCTOR DETAIL ======== -->

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<A NAME="AbstractIdleService()"><!-- --></A><H3>
AbstractIdleService</H3>
<PRE>
public <B>AbstractIdleService</B>()</PRE>
<DL>
</DL>

<!-- ============ METHOD DETAIL ========== -->

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<B>Method Detail</B></FONT></TH>
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<A NAME="startUp()"><!-- --></A><H3>
startUp</H3>
<PRE>
protected abstract void <B>startUp</B>()
                         throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></PRE>
<DL>
<DD>Start the service.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="shutDown()"><!-- --></A><H3>
shutDown</H3>
<PRE>
protected abstract void <B>shutDown</B>()
                          throws <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></PRE>
<DL>
<DD>Stop the service.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>

<DT><B>Throws:</B>
<DD><CODE><A HREF="http://java.sun.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</A></CODE></DL>
</DD>
</DL>
<HR>

<A NAME="executor(com.google.common.base.Service.State)"><!-- --></A><H3>
executor</H3>
<PRE>
protected <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">Executor</A> <B>executor</B>(<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A>&nbsp;state)</PRE>
<DL>
<DD>Returns the <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> that will be used to run this service.
 Subclasses may override this method to use a custom <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>, which
 may configure its worker thread with a specific name, thread group or
 priority. The returned executor's <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Executor.html?is-external=true#execute(java.lang.Runnable)" title="class or interface in java.util.concurrent"><CODE>execute()</CODE></A> method is called when this service is started and stopped,
 and should return promptly.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>state</CODE> - <A HREF="../../../../../com/google/common/base/Service.State.html#STARTING"><CODE>Service.State.STARTING</CODE></A> or <A HREF="../../../../../com/google/common/base/Service.State.html#STOPPING"><CODE>Service.State.STOPPING</CODE></A>, used by the
     default implementation for naming the thread</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public <A HREF="http://java.sun.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>toString</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE><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></CODE> in class <CODE><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></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="start()"><!-- --></A><H3>
start</H3>
<PRE>
public final <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A>&gt; <B>start</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/google/common/base/Service.html#start()">Service</A></CODE></B></DD>
<DD>If the service state is <A HREF="../../../../../com/google/common/base/Service.State.html#NEW"><CODE>Service.State.NEW</CODE></A>, this initiates service startup
 and returns immediately. If the service has already been started, this
 method returns immediately without taking action. A stopped service may not
 be restarted.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/google/common/base/Service.html#start()">start</A></CODE> in interface <CODE><A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a future for the startup result, regardless of whether this call
     initiated startup. Calling <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#get()" title="class or interface in java.util.concurrent"><CODE>Future.get()</CODE></A> will block until the
     service has finished starting, and returns one of <A HREF="../../../../../com/google/common/base/Service.State.html#RUNNING"><CODE>Service.State.RUNNING</CODE></A>, <A HREF="../../../../../com/google/common/base/Service.State.html#STOPPING"><CODE>Service.State.STOPPING</CODE></A> or <A HREF="../../../../../com/google/common/base/Service.State.html#TERMINATED"><CODE>Service.State.TERMINATED</CODE></A>. If
     the service fails to start, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#get()" title="class or interface in java.util.concurrent"><CODE>Future.get()</CODE></A> will throw an <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutionException.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ExecutionException</CODE></A>, and the service's state will be <A HREF="../../../../../com/google/common/base/Service.State.html#FAILED"><CODE>Service.State.FAILED</CODE></A>. If it has already finished starting, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#get()" title="class or interface in java.util.concurrent"><CODE>Future.get()</CODE></A>
     returns immediately. Cancelling the returned future is unsupported and
     always returns <code>false</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="startAndWait()"><!-- --></A><H3>
startAndWait</H3>
<PRE>
public final <A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A> <B>startAndWait</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/google/common/base/Service.html#startAndWait()">Service</A></CODE></B></DD>
<DD>Initiates service startup (if necessary), returning once the service has
 finished starting. Unlike calling <code>start().get()</code>, this method throws
 no checked exceptions.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/google/common/base/Service.html#startAndWait()">startAndWait</A></CODE> in interface <CODE><A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the state of the service when startup finished.</DL>
</DD>
</DL>
<HR>

<A NAME="isRunning()"><!-- --></A><H3>
isRunning</H3>
<PRE>
public final boolean <B>isRunning</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/google/common/base/Service.html#isRunning()">Service</A></CODE></B></DD>
<DD>Returns <code>true</code> if this service is <A HREF="../../../../../com/google/common/base/Service.State.html#RUNNING"><CODE>running</CODE></A>.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/google/common/base/Service.html#isRunning()">isRunning</A></CODE> in interface <CODE><A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="state()"><!-- --></A><H3>
state</H3>
<PRE>
public final <A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A> <B>state</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/google/common/base/Service.html#state()">Service</A></CODE></B></DD>
<DD>Returns the lifecycle state of the service.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/google/common/base/Service.html#state()">state</A></CODE> in interface <CODE><A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="stop()"><!-- --></A><H3>
stop</H3>
<PRE>
public final <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true" title="class or interface in java.util.concurrent">Future</A>&lt;<A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A>&gt; <B>stop</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/google/common/base/Service.html#stop()">Service</A></CODE></B></DD>
<DD>If the service is <A HREF="../../../../../com/google/common/base/Service.State.html#STARTING"><CODE>Service.State.STARTING</CODE></A> or <A HREF="../../../../../com/google/common/base/Service.State.html#RUNNING"><CODE>Service.State.RUNNING</CODE></A>, this
 initiates service shutdown and returns immediately. If this is <A HREF="../../../../../com/google/common/base/Service.State.html#NEW"><CODE>Service.State.NEW</CODE></A>, it is <A HREF="../../../../../com/google/common/base/Service.State.html#TERMINATED"><CODE>terminated</CODE></A> without having been
 started nor stopped.  If the service has already been stopped, this
 method returns immediately without taking action.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/google/common/base/Service.html#stop()">stop</A></CODE> in interface <CODE><A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>a future for the shutdown result, regardless of whether this call
     initiated shutdown. Calling <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#get()" title="class or interface in java.util.concurrent"><CODE>Future.get()</CODE></A> will block until the
     service has finished shutting down, and either returns <A HREF="../../../../../com/google/common/base/Service.State.html#TERMINATED"><CODE>Service.State.TERMINATED</CODE></A> or throws an <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/ExecutionException.html?is-external=true" title="class or interface in java.util.concurrent"><CODE>ExecutionException</CODE></A>. If it has
     already finished stopping, <A HREF="http://java.sun.com/javase/6/docs/api/java/util/concurrent/Future.html?is-external=true#get()" title="class or interface in java.util.concurrent"><CODE>Future.get()</CODE></A> returns immediately.
     Cancelling this future is unsupported and always returns <code>false</code>.</DL>
</DD>
</DL>
<HR>

<A NAME="stopAndWait()"><!-- --></A><H3>
stopAndWait</H3>
<PRE>
public final <A HREF="../../../../../com/google/common/base/Service.State.html" title="enum in com.google.common.base">Service.State</A> <B>stopAndWait</B>()</PRE>
<DL>
<DD><B>Description copied from interface: <CODE><A HREF="../../../../../com/google/common/base/Service.html#stopAndWait()">Service</A></CODE></B></DD>
<DD>Initiates service shutdown (if necessary), returning once the service has
 finished stopping. If this is <A HREF="../../../../../com/google/common/base/Service.State.html#STARTING"><CODE>Service.State.STARTING</CODE></A>, startup will be
 cancelled. If this is <A HREF="../../../../../com/google/common/base/Service.State.html#NEW"><CODE>Service.State.NEW</CODE></A>, it is <A HREF="../../../../../com/google/common/base/Service.State.html#TERMINATED"><CODE>terminated</CODE></A> without having been started nor stopped. Unlike calling <code>stop().get()</code>, this method throws no checked exceptions.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../../com/google/common/base/Service.html#stopAndWait()">stopAndWait</A></CODE> in interface <CODE><A HREF="../../../../../com/google/common/base/Service.html" title="interface in com.google.common.base">Service</A></CODE></DL>
</DD>
<DD><DL>

<DT><B>Returns:</B><DD>the state of the service when shutdown finished.</DL>
</DD>
</DL>
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