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ApplicationHandle
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org.osgi.service.application</FONT>
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Class ApplicationHandle</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>org.osgi.service.application.ApplicationHandle</B>
</PRE>
<HR>
<DL>
<DT><PRE>public abstract class <B>ApplicationHandle</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
ApplicationHandle is an OSGi service interface which represents an instance
of an application. It provides the functionality to query and manipulate the
lifecycle state of the represented application instance. It defines constants
for the lifecycle states.
<P>
<P>
<HR>
<P>
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<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#APPLICATION_DESCRIPTOR">APPLICATION_DESCRIPTOR</A></B></CODE>
<BR>
The property key for the pid of the corresponding application descriptor.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#APPLICATION_PID">APPLICATION_PID</A></B></CODE>
<BR>
The property key for the unique identifier (PID) of the application
instance.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#APPLICATION_STATE">APPLICATION_STATE</A></B></CODE>
<BR>
The property key for the state of this application instance.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#APPLICATION_SUPPORTS_EXITVALUE">APPLICATION_SUPPORTS_EXITVALUE</A></B></CODE>
<BR>
The property key for the supports exit value property of this application
instance.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#RUNNING">RUNNING</A></B></CODE>
<BR>
The application instance is running.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#STOPPING">STOPPING</A></B></CODE>
<BR>
The application instance is being stopped.</TD>
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<CODE>protected </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#ApplicationHandle(java.lang.String, org.osgi.service.application.ApplicationDescriptor)">ApplicationHandle</A></B>(java.lang.String instanceId,
<A HREF="../../../../org/osgi/service/application/ApplicationDescriptor.html" title="class in org.osgi.service.application">ApplicationDescriptor</A> descriptor)</CODE>
<BR>
Application instance identifier is specified by the container when the
instance is created.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#destroy()">destroy</A></B>()</CODE>
<BR>
The application instance's lifecycle state can be influenced by this
method.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected abstract void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#destroySpecific()">destroySpecific</A></B>()</CODE>
<BR>
Called by the destroy() method to perform application model specific
steps to stop and destroy an application instance safely.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../org/osgi/service/application/ApplicationDescriptor.html" title="class in org.osgi.service.application">ApplicationDescriptor</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#getApplicationDescriptor()">getApplicationDescriptor</A></B>()</CODE>
<BR>
Retrieves the <code>ApplicationDescriptor</code> to which this
<code>ApplicationHandle</code> belongs.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#getExitValue(long)">getExitValue</A></B>(long timeout)</CODE>
<BR>
Returns the exit value for the application instance.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#getInstanceId()">getInstanceId</A></B>()</CODE>
<BR>
Returns the unique identifier of this instance.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/osgi/service/application/ApplicationHandle.html#getState()">getState</A></B>()</CODE>
<BR>
Get the state of the application instance.</TD>
</TR>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="APPLICATION_PID"><!-- --></A><H3>
APPLICATION_PID</H3>
<PRE>
public static final java.lang.String <B>APPLICATION_PID</B></PRE>
<DL>
<DD>The property key for the unique identifier (PID) of the application
instance.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.osgi.service.application.ApplicationHandle.APPLICATION_PID">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="APPLICATION_DESCRIPTOR"><!-- --></A><H3>
APPLICATION_DESCRIPTOR</H3>
<PRE>
public static final java.lang.String <B>APPLICATION_DESCRIPTOR</B></PRE>
<DL>
<DD>The property key for the pid of the corresponding application descriptor.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.osgi.service.application.ApplicationHandle.APPLICATION_DESCRIPTOR">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="APPLICATION_STATE"><!-- --></A><H3>
APPLICATION_STATE</H3>
<PRE>
public static final java.lang.String <B>APPLICATION_STATE</B></PRE>
<DL>
<DD>The property key for the state of this application instance.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.osgi.service.application.ApplicationHandle.APPLICATION_STATE">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="APPLICATION_SUPPORTS_EXITVALUE"><!-- --></A><H3>
APPLICATION_SUPPORTS_EXITVALUE</H3>
<PRE>
public static final java.lang.String <B>APPLICATION_SUPPORTS_EXITVALUE</B></PRE>
<DL>
<DD>The property key for the supports exit value property of this application
instance.
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>1.1</DD>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.osgi.service.application.ApplicationHandle.APPLICATION_SUPPORTS_EXITVALUE">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="RUNNING"><!-- --></A><H3>
RUNNING</H3>
<PRE>
public static final java.lang.String <B>RUNNING</B></PRE>
<DL>
<DD>The application instance is running. This is the initial state of a newly
created application instance.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.osgi.service.application.ApplicationHandle.RUNNING">Constant Field Values</A></DL>
</DL>
<HR>
<A NAME="STOPPING"><!-- --></A><H3>
STOPPING</H3>
<PRE>
public static final java.lang.String <B>STOPPING</B></PRE>
<DL>
<DD>The application instance is being stopped. This is the state of the
application instance during the execution of the <code>destroy()</code>
method.
<P>
<DL>
<DT><B>See Also:</B><DD><A HREF="../../../../constant-values.html#org.osgi.service.application.ApplicationHandle.STOPPING">Constant Field Values</A></DL>
</DL>
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<A NAME="ApplicationHandle(java.lang.String, org.osgi.service.application.ApplicationDescriptor)"><!-- --></A><H3>
ApplicationHandle</H3>
<PRE>
protected <B>ApplicationHandle</B>(java.lang.String instanceId,
<A HREF="../../../../org/osgi/service/application/ApplicationDescriptor.html" title="class in org.osgi.service.application">ApplicationDescriptor</A> descriptor)</PRE>
<DL>
<DD>Application instance identifier is specified by the container when the
instance is created. The instance identifier must remain static for the
lifetime of the instance, it must remain the same even across framework
restarts for the same application instance. This value must be the same
as the <code>service.pid</code> service property of this application
handle.
<p>
The instance identifier should follow the following scheme:
<<i>application descriptor PID</i>>.<<i>index</i>>
where <<i>application descriptor PID</i>> is the PID of the
corresponding <code>ApplicationDescriptor</code> and <<i>index</i>>
is a unique integer index assigned by the application container.
Even after destroying the application index the same index value should not
be reused in a reasonably long timeframe.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>instanceId</CODE> - the instance identifier of the represented application
instance. It must not be null.<DD><CODE>descriptor</CODE> - the <code>ApplicationDescriptor</code> of the represented
application instance. It must not be null.
<DT><B>Throws:</B>
<DD><CODE>java.lang.NullPointerException</CODE> - if any of the arguments is null.</DL>
</DL>
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<A NAME="getApplicationDescriptor()"><!-- --></A><H3>
getApplicationDescriptor</H3>
<PRE>
public final <A HREF="../../../../org/osgi/service/application/ApplicationDescriptor.html" title="class in org.osgi.service.application">ApplicationDescriptor</A> <B>getApplicationDescriptor</B>()</PRE>
<DL>
<DD>Retrieves the <code>ApplicationDescriptor</code> to which this
<code>ApplicationHandle</code> belongs.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>The corresponding <code>ApplicationDescriptor</code></DL>
</DD>
</DL>
<HR>
<A NAME="getState()"><!-- --></A><H3>
getState</H3>
<PRE>
public abstract java.lang.String <B>getState</B>()</PRE>
<DL>
<DD>Get the state of the application instance.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the state of the application.
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalStateException</CODE> - if the application handle is unregistered</DL>
</DD>
</DL>
<HR>
<A NAME="getExitValue(long)"><!-- --></A><H3>
getExitValue</H3>
<PRE>
public java.lang.Object <B>getExitValue</B>(long timeout)
throws <A HREF="../../../../org/osgi/service/application/ApplicationException.html" title="class in org.osgi.service.application">ApplicationException</A>,
java.lang.InterruptedException</PRE>
<DL>
<DD>Returns the exit value for the application instance. The timeout
specifies how the method behaves when the application has not yet
terminated. A negative, zero or positive value may be used.
<ul>
<li> negative - The method does not wait for termination. If the
application has not terminated then an <code>ApplicationException</code>
is thrown.</li>
<li> zero - The method waits until the application terminates.</li>
<li> positive - The method waits until the application terminates or the
timeout expires. If the timeout expires and the application has not
terminated then an <code>ApplicationException</code> is thrown.</li>
</ul>
<p>
The default implementation throws an
<code>UnsupportedOperationException</code>. The application model should
override this method if exit values are supported.
</p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>timeout</CODE> - The maximum time in milliseconds to wait for the
application to timeout.
<DT><B>Returns:</B><DD>The exit value for the application instance. The value is
application specific.
<DT><B>Throws:</B>
<DD><CODE>java.lang.UnsupportedOperationException</CODE> - If the application model does not
support exit values.
<DD><CODE>java.lang.InterruptedException</CODE> - If the thread is interrupted while waiting
for the timeout.
<DD><CODE><A HREF="../../../../org/osgi/service/application/ApplicationException.html" title="class in org.osgi.service.application">ApplicationException</A></CODE> - If the application has not terminated. The
error code will be
<A HREF="../../../../org/osgi/service/application/ApplicationException.html#APPLICATION_EXITVALUE_NOT_AVAILABLE"><CODE>ApplicationException.APPLICATION_EXITVALUE_NOT_AVAILABLE</CODE></A>.<DT><B>Since:</B></DT>
<DD>1.1</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="getInstanceId()"><!-- --></A><H3>
getInstanceId</H3>
<PRE>
public final java.lang.String <B>getInstanceId</B>()</PRE>
<DL>
<DD>Returns the unique identifier of this instance. This value is also
available as a service property of this application handle's service.pid.
<P>
<DD><DL>
<DT><B>Returns:</B><DD>the unique identifier of the instance</DL>
</DD>
</DL>
<HR>
<A NAME="destroy()"><!-- --></A><H3>
destroy</H3>
<PRE>
public final void <B>destroy</B>()</PRE>
<DL>
<DD>The application instance's lifecycle state can be influenced by this
method. It lets the application instance perform operations to stop
the application safely, e.g. saving its state to a permanent storage.
<p>
The method must check if the lifecycle transition is valid; a STOPPING
application cannot be stopped. If it is invalid then the method must
exit. Otherwise the lifecycle state of the application instance must be
set to STOPPING. Then the destroySpecific() method must be called to
perform any application model specific steps for safe stopping of the
represented application instance.
<p>
At the end the <code>ApplicationHandle</code> must be unregistered.
This method should free all the resources related to this
<code>ApplicationHandle</code>.
<p>
When this method is completed the application instance has already made
its operations for safe stopping, the ApplicationHandle has been
unregistered and its related resources has been freed. Further calls on
this application should not be made because they may have unexpected
results.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE>java.lang.SecurityException</CODE> - if the caller doesn't have "lifecycle"
<code>ApplicationAdminPermission</code> for the corresponding application.
<DD><CODE>java.lang.IllegalStateException</CODE> - if the application handle is unregistered</DL>
</DD>
</DL>
<HR>
<A NAME="destroySpecific()"><!-- --></A><H3>
destroySpecific</H3>
<PRE>
protected abstract void <B>destroySpecific</B>()</PRE>
<DL>
<DD>Called by the destroy() method to perform application model specific
steps to stop and destroy an application instance safely.
<P>
<DD><DL>
<DT><B>Throws:</B>
<DD><CODE>java.lang.IllegalStateException</CODE> - if the application handle is unregistered</DL>
</DD>
</DL>
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