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InvocationConfiguration (Tuscany Core incubating-M1 API)
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org.apache.tuscany.core.wire</FONT>
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Class InvocationConfiguration</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../../../resources/inherit.gif" ALT="extended by "><B>org.apache.tuscany.core.wire.InvocationConfiguration</B>
</PRE>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../../org/apache/tuscany/core/wire/SourceInvocationConfiguration.html" title="class in org.apache.tuscany.core.wire">SourceInvocationConfiguration</A>, <A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvocationConfiguration.html" title="class in org.apache.tuscany.core.wire">TargetInvocationConfiguration</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public abstract class <B>InvocationConfiguration</B><DT>extends java.lang.Object</DL>
</PRE>
<P>
Contains a source- or target-side invocation pipeline for a service operation. The runtime framework creates invocation chains
on a per-operation, per-service basis. Further, invocation chains are further distinguished by being part of the source or
target sides of a wire. Chains are "bridged" together by the runtime by a set of <A HREF="../../../../../org/apache/tuscany/core/builder/WireBuilder.html" title="interface in org.apache.tuscany.core.builder"><CODE>WireBuilder</CODE></A>s with the source-side holding references to the target.
<p/>
<code>InvocationChain</code>s are managed by <A HREF="../../../../../org/apache/tuscany/core/wire/WireConfiguration.html" title="class in org.apache.tuscany.core.wire"><CODE>WireConfiguration</CODE></A>s, which are used by <A HREF="../../../../../org/apache/tuscany/core/wire/WireFactory.html" title="interface in org.apache.tuscany.core.wire"><CODE>WireFactory</CODE></A>s to buildSource wires and proxies.
<p/>
Invocation configurations must contain at least one interceptor and may have 0 to N handlers. Handlers process a wire request
or response in a one-way fashion. A typical wire sequence where interceptors and handlers are configured for both the source
and target-side will proceed as follows:
<pre>
<ol>
<li>The first source interceptor will be called with a message, which will in
turn invoke the next interceptor in the chain <li>The last source interceptor, which must be of type <A HREF="../../../../../org/apache/tuscany/core/wire/impl/RequestResponseInterceptor.html" title="class in org.apache.tuscany.core.wire.impl"><CODE>RequestResponseInterceptor</CODE></A> if there are handlers present, will be invoked. The RR
interceptor will in turn pass the message to a <A HREF="../../../../../org/apache/tuscany/core/wire/MessageChannel.html" title="interface in org.apache.tuscany.core.wire"><CODE>MessageChannel</CODE></A> which will invoke all source-side request handlers.
<li>The RR interceptor will then invoke the target-side request <code>MessageChannel</code>.
<li>The last source-side handler, an instance of <A HREF="../../../../../org/apache/tuscany/core/wire/impl/MessageDispatcher.html" title="class in org.apache.tuscany.core.wire.impl"><CODE>MessageDispatcher</CODE></A>, will invoke the
first source-side interceptor, which in turn will pass the message down the target-side interceptor chain.
<li>If the target is a component instance the last target-side interceptor, an instance of
<A HREF="../../../../../org/apache/tuscany/core/wire/impl/InvokerInterceptor.html" title="class in org.apache.tuscany.core.wire.impl"><CODE>InvokerInterceptor</CODE></A> will retrieve the <A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire"><CODE>TargetInvoker</CODE></A> from the message and
call it to invoke the operation on a target instance. <tt>TargetInvoker</tt>s are help by
the source proxy to enable optimizations such as caching of target instances. <li> The response is returned up the wire
stack
until it reaches the source-side <tt>RequestResponseInterceptor</tt>, which invokes the target and source-side response
channels respectively.
<li>The response is then passed back up the rest of the wire stack. </ol>
</pre>
<p/>
The source-to-target bridge may be constructed in any of the following ways:
<pre>
<ul>
<li>Source handler-to-target handler
<li>Source handler-to-target interceptor
<li>Source interceptor-to-target handler
<li>Source interceptor-to-target interceptor
</ul>
</pre>
<p/>
In some scenarios, a service proxy may only contain target-side invocaton chains, for example, when a service is resolved
through a locate operation by a non-component client. In this case, there will be no source-side wire chains and the target
invoker will be held by the target-side and passed down the pipeline.
<P>
<P>
<DL>
<DT><B>Version:</B></DT>
<DD>$Rev: 396284 $ $Date: 2006-04-23 11:27:42 -0400 (Sun, 23 Apr 2006) $</DD>
<DT><B>See Also:</B><DD><A HREF="../../../../../org/apache/tuscany/core/builder/WireBuilder.html" title="interface in org.apache.tuscany.core.builder"><CODE>WireBuilder</CODE></A>,
<A HREF="../../../../../org/apache/tuscany/core/wire/WireFactory.html" title="interface in org.apache.tuscany.core.wire"><CODE>WireFactory</CODE></A>,
<A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire"><CODE>TargetInvoker</CODE></A>,
<A HREF="../../../../../org/apache/tuscany/core/wire/impl/MessageDispatcher.html" title="class in org.apache.tuscany.core.wire.impl"><CODE>MessageDispatcher</CODE></A></DL>
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<!-- =========== FIELD SUMMARY =========== -->
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#interceptorChainHead">interceptorChainHead</A></B></CODE>
<BR>
</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#interceptorChainTail">interceptorChainTail</A></B></CODE>
<BR>
</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.lang.reflect.Method</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#operation">operation</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#requestHandlers">requestHandlers</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#responseHandlers">responseHandlers</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire">TargetInvoker</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#targetInvoker">targetInvoker</A></B></CODE>
<BR>
</TD>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<B>Constructor Summary</B></FONT></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#InvocationConfiguration(java.lang.reflect.Method)">InvocationConfiguration</A></B>(java.lang.reflect.Method operation)</CODE>
<BR>
</TD>
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<!-- ========== METHOD SUMMARY =========== -->
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#addInterceptor(org.apache.tuscany.core.wire.Interceptor)">addInterceptor</A></B>(<A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A> interceptor)</CODE>
<BR>
Adds an interceptor to the chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#addRequestHandler(org.apache.tuscany.core.wire.MessageHandler)">addRequestHandler</A></B>(<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A> handler)</CODE>
<BR>
Adds an request handler to the invocation chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#addResponseHandler(org.apache.tuscany.core.wire.MessageHandler)">addResponseHandler</A></B>(<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A> handler)</CODE>
<BR>
Adds an response handler to the invocation chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#build()">build</A></B>()</CODE>
<BR>
Signals to the chain that its configuration is complete.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#getHeadInterceptor()">getHeadInterceptor</A></B>()</CODE>
<BR>
Returns the first interceptor in the chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.reflect.Method</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#getMethod()">getMethod</A></B>()</CODE>
<BR>
Returns the target operation for this invocation chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#getRequestHandlers()">getRequestHandlers</A></B>()</CODE>
<BR>
Returns the request handler chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#getResponseHandlers()">getResponseHandlers</A></B>()</CODE>
<BR>
Returns the response handler chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#getTailInterceptor()">getTailInterceptor</A></B>()</CODE>
<BR>
Returns the last interceptor in the chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire">TargetInvoker</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#getTargetInvoker()">getTargetInvoker</A></B>()</CODE>
<BR>
Returns the target invoker that is passed down the chain</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/core/wire/InvocationConfiguration.html#setTargetInvoker(org.apache.tuscany.core.wire.TargetInvoker)">setTargetInvoker</A></B>(<A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire">TargetInvoker</A> invoker)</CODE>
<BR>
Sets the target invoker to pass down the chain</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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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="operation"><!-- --></A><H3>
operation</H3>
<PRE>
protected java.lang.reflect.Method <B>operation</B></PRE>
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<DL>
</DL>
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<A NAME="targetInvoker"><!-- --></A><H3>
targetInvoker</H3>
<PRE>
protected <A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire">TargetInvoker</A> <B>targetInvoker</B></PRE>
<DL>
<DL>
</DL>
</DL>
<HR>
<A NAME="interceptorChainHead"><!-- --></A><H3>
interceptorChainHead</H3>
<PRE>
protected <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A> <B>interceptorChainHead</B></PRE>
<DL>
<DL>
</DL>
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<A NAME="interceptorChainTail"><!-- --></A><H3>
interceptorChainTail</H3>
<PRE>
protected <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A> <B>interceptorChainTail</B></PRE>
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<DL>
</DL>
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<A NAME="requestHandlers"><!-- --></A><H3>
requestHandlers</H3>
<PRE>
protected java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>> <B>requestHandlers</B></PRE>
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<DL>
</DL>
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<A NAME="responseHandlers"><!-- --></A><H3>
responseHandlers</H3>
<PRE>
protected java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>> <B>responseHandlers</B></PRE>
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<DL>
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<A NAME="InvocationConfiguration(java.lang.reflect.Method)"><!-- --></A><H3>
InvocationConfiguration</H3>
<PRE>
public <B>InvocationConfiguration</B>(java.lang.reflect.Method operation)</PRE>
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<A NAME="getMethod()"><!-- --></A><H3>
getMethod</H3>
<PRE>
public java.lang.reflect.Method <B>getMethod</B>()</PRE>
<DL>
<DD>Returns the target operation for this invocation chain
<P>
<DD><DL>
</DL>
</DD>
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<HR>
<A NAME="addRequestHandler(org.apache.tuscany.core.wire.MessageHandler)"><!-- --></A><H3>
addRequestHandler</H3>
<PRE>
public void <B>addRequestHandler</B>(<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A> handler)</PRE>
<DL>
<DD>Adds an request handler to the invocation chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
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<A NAME="addResponseHandler(org.apache.tuscany.core.wire.MessageHandler)"><!-- --></A><H3>
addResponseHandler</H3>
<PRE>
public void <B>addResponseHandler</B>(<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A> handler)</PRE>
<DL>
<DD>Adds an response handler to the invocation chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getRequestHandlers()"><!-- --></A><H3>
getRequestHandlers</H3>
<PRE>
public java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>> <B>getRequestHandlers</B>()</PRE>
<DL>
<DD>Returns the request handler chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getResponseHandlers()"><!-- --></A><H3>
getResponseHandlers</H3>
<PRE>
public java.util.List<<A HREF="../../../../../org/apache/tuscany/core/wire/MessageHandler.html" title="interface in org.apache.tuscany.core.wire">MessageHandler</A>> <B>getResponseHandlers</B>()</PRE>
<DL>
<DD>Returns the response handler chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setTargetInvoker(org.apache.tuscany.core.wire.TargetInvoker)"><!-- --></A><H3>
setTargetInvoker</H3>
<PRE>
public void <B>setTargetInvoker</B>(<A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire">TargetInvoker</A> invoker)</PRE>
<DL>
<DD>Sets the target invoker to pass down the chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getTargetInvoker()"><!-- --></A><H3>
getTargetInvoker</H3>
<PRE>
public <A HREF="../../../../../org/apache/tuscany/core/wire/TargetInvoker.html" title="interface in org.apache.tuscany.core.wire">TargetInvoker</A> <B>getTargetInvoker</B>()</PRE>
<DL>
<DD>Returns the target invoker that is passed down the chain
<P>
<DD><DL>
</DL>
</DD>
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<HR>
<A NAME="addInterceptor(org.apache.tuscany.core.wire.Interceptor)"><!-- --></A><H3>
addInterceptor</H3>
<PRE>
public void <B>addInterceptor</B>(<A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A> interceptor)</PRE>
<DL>
<DD>Adds an interceptor to the chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getTailInterceptor()"><!-- --></A><H3>
getTailInterceptor</H3>
<PRE>
public <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A> <B>getTailInterceptor</B>()</PRE>
<DL>
<DD>Returns the last interceptor in the chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getHeadInterceptor()"><!-- --></A><H3>
getHeadInterceptor</H3>
<PRE>
public <A HREF="../../../../../org/apache/tuscany/core/wire/Interceptor.html" title="interface in org.apache.tuscany.core.wire">Interceptor</A> <B>getHeadInterceptor</B>()</PRE>
<DL>
<DD>Returns the first interceptor in the chain
<P>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="build()"><!-- --></A><H3>
build</H3>
<PRE>
public abstract void <B>build</B>()</PRE>
<DL>
<DD>Signals to the chain that its configuration is complete. Implementations may use this callback to prepare there invocation
chains.
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