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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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InvocationChain
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org.apache.tuscany.sca.invocation</FONT>
<BR>
Interface InvocationChain</H2>
<DL>
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../../org/apache/tuscany/sca/core/invocation/InvocationChainImpl.html" title="class in org.apache.tuscany.sca.core.invocation">InvocationChainImpl</A></DD>
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<DL>
<DT><PRE>public interface <B>InvocationChain</B></DL>
</PRE>

<P>
A wire consists of 1..n invocation chains associated with the operations of its source service contract.
 <p/>
 Invocation chains may contain <code>Interceptors</code> that process invocations.
 <p/>
 A <code>Message</code> is used to pass data associated with an invocation through the chain.
<P>

<P>
<HR>

<P>

<!-- ========== 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>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#addInterceptor(org.apache.tuscany.sca.invocation.Interceptor)">addInterceptor</A></B>(<A HREF="../../../../../org/apache/tuscany/sca/invocation/Interceptor.html" title="interface in org.apache.tuscany.sca.invocation">Interceptor</A>&nbsp;interceptor)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Adds an interceptor to the chain.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#addInterceptor(int, org.apache.tuscany.sca.invocation.Interceptor)">addInterceptor</A></B>(int&nbsp;index,
               <A HREF="../../../../../org/apache/tuscany/sca/invocation/Interceptor.html" title="interface in org.apache.tuscany.sca.invocation">Interceptor</A>&nbsp;interceptor)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I>Please use <code>void addInterceptor(String phase, Interceptor interceptor);</code>
 Adds an interceptor at the given position in the interceptor stack</I></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#addInterceptor(java.lang.String, org.apache.tuscany.sca.invocation.Interceptor)">addInterceptor</A></B>(java.lang.String&nbsp;phase,
               <A HREF="../../../../../org/apache/tuscany/sca/invocation/Interceptor.html" title="interface in org.apache.tuscany.sca.invocation">Interceptor</A>&nbsp;interceptor)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Add an interceptor to the given phase</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#addInvoker(org.apache.tuscany.sca.invocation.Invoker)">addInvoker</A></B>(<A HREF="../../../../../org/apache/tuscany/sca/invocation/Invoker.html" title="interface in org.apache.tuscany.sca.invocation">Invoker</A>&nbsp;invoker)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Adds an invoker to the chain</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="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#allowsPassByReference()">allowsPassByReference</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Indicate if the data can be passed in by reference as they won't be mutated.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../org/apache/tuscany/sca/invocation/Invoker.html" title="interface in org.apache.tuscany.sca.invocation">Invoker</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#getHeadInvoker()">getHeadInvoker</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the first invoker in the chain.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../org/apache/tuscany/sca/interfacedef/Operation.html" title="interface in org.apache.tuscany.sca.interfacedef">Operation</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#getSourceOperation()">getSourceOperation</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the source operation for this invocation chain.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../org/apache/tuscany/sca/invocation/Invoker.html" title="interface in org.apache.tuscany.sca.invocation">Invoker</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#getTailInvoker()">getTailInvoker</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>Deprecated.</B>&nbsp;<I>This method is not used
 Returns the last invoker in the chain.</I></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="../../../../../org/apache/tuscany/sca/interfacedef/Operation.html" title="interface in org.apache.tuscany.sca.interfacedef">Operation</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#getTargetOperation()">getTargetOperation</A></B>()</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#setAllowsPassByReference(boolean)">setAllowsPassByReference</A></B>(boolean&nbsp;allowsPBR)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Force the invocation to allow pass-by-reference</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../org/apache/tuscany/sca/invocation/InvocationChain.html#setTargetOperation(org.apache.tuscany.sca.interfacedef.Operation)">setTargetOperation</A></B>(<A HREF="../../../../../org/apache/tuscany/sca/interfacedef/Operation.html" title="interface in org.apache.tuscany.sca.interfacedef">Operation</A>&nbsp;operation)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Updates the target operation for this invocation chain.</TD>
</TR>
</TABLE>
&nbsp;
<P>

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<A NAME="getTargetOperation()"><!-- --></A><H3>
getTargetOperation</H3>
<PRE>
<A HREF="../../../../../org/apache/tuscany/sca/interfacedef/Operation.html" title="interface in org.apache.tuscany.sca.interfacedef">Operation</A> <B>getTargetOperation</B>()</PRE>
<DL>
<DD>Returns the target operation for this invocation chain.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The target operation for this invocation chain</DL>
</DD>
</DL>
<HR>

<A NAME="setTargetOperation(org.apache.tuscany.sca.interfacedef.Operation)"><!-- --></A><H3>
setTargetOperation</H3>
<PRE>
void <B>setTargetOperation</B>(<A HREF="../../../../../org/apache/tuscany/sca/interfacedef/Operation.html" title="interface in org.apache.tuscany.sca.interfacedef">Operation</A>&nbsp;operation)</PRE>
<DL>
<DD>Updates the target operation for this invocation chain.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>operation</CODE> - The new target operation for this invocation chain</DL>
</DD>
</DL>
<HR>

<A NAME="getSourceOperation()"><!-- --></A><H3>
getSourceOperation</H3>
<PRE>
<A HREF="../../../../../org/apache/tuscany/sca/interfacedef/Operation.html" title="interface in org.apache.tuscany.sca.interfacedef">Operation</A> <B>getSourceOperation</B>()</PRE>
<DL>
<DD>Returns the source operation for this invocation chain.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The source operation for this invocation chain</DL>
</DD>
</DL>
<HR>

<A NAME="addInterceptor(org.apache.tuscany.sca.invocation.Interceptor)"><!-- --></A><H3>
addInterceptor</H3>
<PRE>
void <B>addInterceptor</B>(<A HREF="../../../../../org/apache/tuscany/sca/invocation/Interceptor.html" title="interface in org.apache.tuscany.sca.invocation">Interceptor</A>&nbsp;interceptor)</PRE>
<DL>
<DD>Adds an interceptor to the chain. For reference side, it will be added to
 Phase.REFERENCE. For service side, it will be added to Phase.SERVICE
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>interceptor</CODE> - The interceptor to add</DL>
</DD>
</DL>
<HR>

<A NAME="addInvoker(org.apache.tuscany.sca.invocation.Invoker)"><!-- --></A><H3>
addInvoker</H3>
<PRE>
void <B>addInvoker</B>(<A HREF="../../../../../org/apache/tuscany/sca/invocation/Invoker.html" title="interface in org.apache.tuscany.sca.invocation">Invoker</A>&nbsp;invoker)</PRE>
<DL>
<DD>Adds an invoker to the chain
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>invoker</CODE> - The invoker to add</DL>
</DD>
</DL>
<HR>

<A NAME="getHeadInvoker()"><!-- --></A><H3>
getHeadInvoker</H3>
<PRE>
<A HREF="../../../../../org/apache/tuscany/sca/invocation/Invoker.html" title="interface in org.apache.tuscany.sca.invocation">Invoker</A> <B>getHeadInvoker</B>()</PRE>
<DL>
<DD>Returns the first invoker in the chain.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The first invoker in the chain</DL>
</DD>
</DL>
<HR>

<A NAME="getTailInvoker()"><!-- --></A><H3>
getTailInvoker</H3>
<PRE>
<FONT SIZE="-1">@Deprecated
</FONT><A HREF="../../../../../org/apache/tuscany/sca/invocation/Invoker.html" title="interface in org.apache.tuscany.sca.invocation">Invoker</A> <B>getTailInvoker</B>()</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>This method is not used
 Returns the last invoker in the chain.</I>
<P>
<DD><DL>

<DT><B>Returns:</B><DD>The last invoker in the chain</DL>
</DD>
</DL>
<HR>

<A NAME="addInterceptor(int, org.apache.tuscany.sca.invocation.Interceptor)"><!-- --></A><H3>
addInterceptor</H3>
<PRE>
<FONT SIZE="-1">@Deprecated
</FONT>void <B>addInterceptor</B>(int&nbsp;index,
                               <A HREF="../../../../../org/apache/tuscany/sca/invocation/Interceptor.html" title="interface in org.apache.tuscany.sca.invocation">Interceptor</A>&nbsp;interceptor)</PRE>
<DL>
<DD><B>Deprecated.</B>&nbsp;<I>Please use <code>void addInterceptor(String phase, Interceptor interceptor);</code>
 Adds an interceptor at the given position in the interceptor stack</I>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - The position in the interceptor stack to add the interceptor<DD><CODE>interceptor</CODE> - The interceptor to add</DL>
</DD>
</DL>
<HR>

<A NAME="addInterceptor(java.lang.String, org.apache.tuscany.sca.invocation.Interceptor)"><!-- --></A><H3>
addInterceptor</H3>
<PRE>
void <B>addInterceptor</B>(java.lang.String&nbsp;phase,
                    <A HREF="../../../../../org/apache/tuscany/sca/invocation/Interceptor.html" title="interface in org.apache.tuscany.sca.invocation">Interceptor</A>&nbsp;interceptor)</PRE>
<DL>
<DD>Add an interceptor to the given phase
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>phase</CODE> - <DD><CODE>interceptor</CODE> - </DL>
</DD>
</DL>
<HR>

<A NAME="allowsPassByReference()"><!-- --></A><H3>
allowsPassByReference</H3>
<PRE>
boolean <B>allowsPassByReference</B>()</PRE>
<DL>
<DD>Indicate if the data can be passed in by reference as they won't be mutated.
<P>
<DD><DL>

<DT><B>Returns:</B><DD>true if pass-by-reference is allowed</DL>
</DD>
</DL>
<HR>

<A NAME="setAllowsPassByReference(boolean)"><!-- --></A><H3>
setAllowsPassByReference</H3>
<PRE>
void <B>setAllowsPassByReference</B>(boolean&nbsp;allowsPBR)</PRE>
<DL>
<DD>Force the invocation to allow pass-by-reference
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>allowsPBR</CODE> - </DL>
</DD>
</DL>
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