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<P>Pulling together notes on what has been build to support federation in the tunk as it stands (just after TSS demo - March 07)</P>
<H2><A name="FederationNotes-References"></A>References</H2>
<P>Raymond's architecture guide <A href="http://cwiki.apache.org/confluence/display/TUSCANY/Tuscany%20Architecture%20Guide" class="external-link" rel="nofollow">http://cwiki.apache.org/confluence/display/TUSCANY/Tuscany+Architecture+Guide</A><BR>
Some discussions from the dev list about contributio, discovery, federation and the TSS demo:</P>
<UL>
<LI>First talk of contribution and assembly service <A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3CE38CFB43-CEB5-456F-BDDD-C25BFFC3C238@apache.org%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3cE38CFB43-CEB5-456F-BDDD-C25BFFC3C238@apache.org%3e</A></LI>
<LI>Mangament service intro <A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3CBAY105-F38054BAB691DCF4F15BA77DDB80@phx.gbl%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3cBAY105-F38054BAB691DCF4F15BA77DDB80@phx.gbl%3e</A></LI>
<LI>First talk of distributed/federated assemblies <A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3C90B6915C-ED14-484A-873F-F26894C63DB2@apache.org%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3c90B6915C-ED14-484A-873F-F26894C63DB2@apache.org%3e</A></LI>
<LI>Resolve and verify phases of deployment <A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3C2F2C595B-CCDA-4AB0-8BF9-A20CB4012F88@apache.org%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3c2F2C595B-CCDA-4AB0-8BF9-A20CB4012F88@apache.org%3e</A></LI>
<LI>JMX and standalone runtime <A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/raw/%3C53EC6802E2BF4643BBD5BC34D2C3A38301B6C3F2@SPR3V4.office.local%3E/" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/raw/%3c53EC6802E2BF4643BBD5BC34D2C3A38301B6C3F2@SPR3V4.office.local%3e/</A><BR>
<A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/raw/%3CBAY105-F20D5A6A881D4A9A3ED3D45DDBD0@phx.gbl%3E/" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/raw/%3cBAY105-F20D5A6A881D4A9A3ED3D45DDBD0@phx.gbl%3e/</A></LI>
<LI>Federated deployment<BR>
<A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3CE6925252-9922-4A65-8867-2B0E2B2BFA67@apache.org%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3cE6925252-9922-4A65-8867-2B0E2B2BFA67@apache.org%3e</A><BR>
<A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3CBAY105-F33CE29B9024EDBB20FCA09DDA70@phx.gbl%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200701.mbox/%3cBAY105-F33CE29B9024EDBB20FCA09DDA70@phx.gbl%3e</A><BR>
<A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200702.mbox/%3C53EC6802E2BF4643BBD5BC34D2C3A38301E41C94@SPR3V4.office.local%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200702.mbox/%3c53EC6802E2BF4643BBD5BC34D2C3A38301E41C94@SPR3V4.office.local%3e</A></LI>
<LI>Federation demo startup<BR>
<A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200703.mbox/%3CBAY105-F14D60CFBA31DA296B772EADD770@phx.gbl%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200703.mbox/%3cBAY105-F14D60CFBA31DA296B772EADD770@phx.gbl%3e</A></LI>
<LI>Meeraj code description<BR>
<A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200703.mbox/%3CBAY105-F7123B0C05FE260B65B8D3DD750@phx.gbl%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200703.mbox/%3cBAY105-F7123B0C05FE260B65B8D3DD750@phx.gbl%3e</A></LI>
<LI>Meeraj note on running the demo<BR>
<A href="http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200703.mbox/%3C53EC6802E2BF4643BBD5BC34D2C3A3830279C142@SPR3V4.office.local%3E" class="external-link" rel="nofollow">http://mail-archives.apache.org/mod_mbox/ws-tuscany-dev/200703.mbox/%3c53EC6802E2BF4643BBD5BC34D2C3A3830279C142@SPR3V4.office.local%3e</A></LI>
</UL>
<H2><A name="FederationNotes-BuildingTheDemo"></A>Building The Demo</H2>
<H3><A name="FederationNotes-FromTheTSSTag"></A>From The TSS Tag</H3>
<P>Follow instructions in README.txt here <A href="http://svn.apache.org/repos/asf/incubator/tuscany/java/distribution/sca/tsss-demo/" class="external-link" rel="nofollow">http://svn.apache.org/repos/asf/incubator/tuscany/java/distribution/sca/tsss-demo/</A><BR>
Unzip the resulting demo zip file<BR>
Meeraj's discussion of switching from JXTA to JSM <A href="http://www.mail-archive.com/tuscany-dev@ws.apache.org/msg15731.html" class="external-link" rel="nofollow">http://www.mail-archive.com/tuscany-dev@ws.apache.org/msg15731.html</A><BR>
I had problems in that some of the required dependency JARs were missing. I copied:</P>
<UL>
<LI>tuscany-jms-discovery-0.1-incubating-SNAPSHOT.jar</LI>
<LI>apache-activemq-4.1.0-incubator.jar</LI>
<LI>tuscany-http-jetty-0.1-incubating-SNAPSHOT.jar</LI>
<LI>jetty-6.1.0.jar</LI>
<LI>jetty-util-6.1.0.jar</LI>
<LI>tuscany-sca-console-0.1-incubating-SNAPSHOT.jar</LI>
<LI>geronimo-j2ee-connector_1.5_spec-1.0.jar</LI>
</UL>
<P>into each of the profiles boot directories</P>
<H3><A name="FederationNotes-ManuallyFromHead"></A>Manually From Head</H3>
<P>I couldn't get this to work as the core tests now fail</P>
<H2><A name="FederationNotes-DebuggingTheDemo"></A>Debugging The Demo</H2>
<P>When run originally the demo complained about missing dependencies. In particular when reading the system components (root.system) I got the error:</P>
<P>org.apache.tuscany.host.runtime.InitializationException: org.apache.tuscany.spi.<BR>
component.GroupInitializationException: sca://root.system/main<BR>
at org.apache.tuscany.core.runtime.AbstractRuntime.initialize(AbstractRu<BR>
ntime.java)<BR>
at org.apache.tuscany.standalone.server.TuscanyServer.startRuntime(Tusca<BR>
nyServer.java:134)</P>
<P>What this actually means is that Tuscany failed to load one of the system components successfully but, by default, doesn't tell what the issue is. I wanted to use Eclipse to debug it so I played about a bit but couldn't get the java -jar command line to come up in the Eclipse debugger. As a fall back I started a remote debugging session. There were three steps to this. </P>
<P>Add a trap to the code to give me a chance to attach the debugger. I added the following lines to the mainline of the:</P>
<DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent panelContent">
<PRE class="code-java">
<SPAN class="code-object">System</SPAN>.out.println(<SPAN class="code-quote">"press a key"</SPAN>);
java.io.BufferedReader stdin = <SPAN class="code-keyword">new</SPAN> java.io.BufferedReader(<SPAN class="code-keyword">new</SPAN> java.io.InputStreamReader(<SPAN class="code-object">System</SPAN>.in));
<SPAN class="code-object">String</SPAN> line = stdin.readLine();
</PRE>
</DIV></DIV>
<P>Start java app with remote debugging enabled. There are plenty of references on the web on how to do this. Here is the comman line I used to start the master profile.</P>
<DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent panelContent">
<PRE class="code-java">
java -Xrunjdwp:server=y,transport=dt_socket,address=4142,suspend=n -Dtuscany.adminPort=2000 -jar server.start.jar ma
ster
</PRE>
</DIV></DIV>
<P>When the app comes up and stops at the trap connect the Eclipse debugger by selecting the remote debugging profile and specifying localhost:4142 as the connection details. The port number (4142) just comes from that specified on the application command line. </P>
<H2><A name="FederationNotes-TurningLoggingOn"></A>Turning Logging On</H2>
<P>Its not clear how to do this just yet. Meeraj suggests that the missing nested exception detail can be printed out by specifying a log formatter. TODO.</P>
<H2><A name="FederationNotes-RunningTheDemo"></A>Running The Demo</H2>
<P>(From Meeraj's post on the subject)<BR>
This is how you start the servers (Please make sure you start ActiveMQ<BR>
before you start the servers) .</P>
<P>Master: java -Dtuscany.adminPort=2000 -jar server.start.jar master<BR>
Slave1: java -Dtuscany.adminPort=3000 -jar server.start.jar slave1<BR>
Slave2: java -Dtuscany.adminPort=4000 -jar server.start.jar slave2</P>
<P>You can access the admin console from <A href="http://localhost:7000/scdlForm" class="external-link" rel="nofollow">http://localhost:7000/scdlForm</A> and<BR>
if you target the deployed SCDL to slave1, access the demo appilcation<BR>
from <A href="http://localhsot:8000/calculatorForm" class="external-link" rel="nofollow">http://localhsot:8000/calculatorForm</A>. The test scdl is as follows<BR>
(this is what you submit from the admin console to target a deployment<BR>
to a slave),</P>
<DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent panelContent">
<PRE class="code-xml">
<composite xmlns=<SPAN class="code-quote">"http://www.osoa.org/xmlns/sca/1.0"</SPAN>
<SPAN class="code-keyword">xmlns:tuscany</SPAN>=<SPAN class="code-quote">"http://tuscany.apache.org/xmlns/sca/2.0-alpha"</SPAN>
name=<SPAN class="code-quote">"CalculatorComposite"</SPAN>>
<SPAN class="code-tag"><component runtimeId=<SPAN class="code-quote">"slave1"</SPAN> name=<SPAN class="code-quote">"CalculatorServiceComponent"</SPAN>></SPAN>
<SPAN class="code-tag"><implementation.java class=<SPAN class="code-quote">"calculator.CalculatorServiceImpl"</SPAN>/></SPAN>
<SPAN class="code-tag"><reference name=<SPAN class="code-quote">"addService"</SPAN> target=<SPAN class="code-quote">"AddServiceComponent"</SPAN>/></SPAN>
<reference name=<SPAN class="code-quote">"subtractService"</SPAN>
target=<SPAN class="code-quote">"SubtractServiceComponent"</SPAN>/>
<reference name=<SPAN class="code-quote">"multiplyService"</SPAN>
target=<SPAN class="code-quote">"MultiplyServiceComponent"</SPAN>/>
<reference name=<SPAN class="code-quote">"divideService"</SPAN>
target=<SPAN class="code-quote">"DivideServiceComponent"</SPAN>/>
<SPAN class="code-tag"></component></SPAN>
<SPAN class="code-tag"><component runtimeId=<SPAN class="code-quote">"slave1"</SPAN> name=<SPAN class="code-quote">"AddServiceComponent"</SPAN>></SPAN>
<SPAN class="code-tag"><implementation.java class=<SPAN class="code-quote">"calculator.AddServiceImpl"</SPAN>/></SPAN>
<SPAN class="code-tag"></component></SPAN>
<SPAN class="code-tag"><component runtimeId=<SPAN class="code-quote">"slave1"</SPAN> name=<SPAN class="code-quote">"SubtractServiceComponent"</SPAN>></SPAN>
<SPAN class="code-tag"><implementation.java class=<SPAN class="code-quote">"calculator.SubtractServiceImpl"</SPAN>/></SPAN>
<SPAN class="code-tag"></component></SPAN>
<SPAN class="code-tag"><component runtimeId=<SPAN class="code-quote">"slave1"</SPAN> name=<SPAN class="code-quote">"MultiplyServiceComponent"</SPAN>></SPAN>
<SPAN class="code-tag"><implementation.java class=<SPAN class="code-quote">"calculator.MultiplyServiceImpl"</SPAN>/></SPAN>
<SPAN class="code-tag"></component></SPAN>
<SPAN class="code-tag"><component runtimeId=<SPAN class="code-quote">"slave1"</SPAN> name=<SPAN class="code-quote">"DivideServiceComponent"</SPAN>></SPAN>
<SPAN class="code-tag"><implementation.java class=<SPAN class="code-quote">"calculator.DivideServiceImpl"</SPAN>/></SPAN>
<SPAN class="code-tag"></component></SPAN>
<SPAN class="code-tag"></composite></SPAN>
</PRE>
</DIV></DIV>
<P>Here is the actual sequence of events:</P>
<P>Start ActiveMQ</P>
<DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent panelContent">
<PRE class="code-java">
java -Dtuscany.adminPort=2000 -jar server.start.jar master
java -Dtuscany.adminPort=3000 -jar server.start.jar slave1
java -Dtuscany.adminPort=4000 -jar server.start.jar slave2
</PRE>
</DIV></DIV>
<P>Each of these just reports "Started" on the command line</P>
<P>Go to <A href="http://localhost:7000/scdlForm" class="external-link" rel="nofollow">http://localhost:7000/scdlForm</A> in a browser and paste in the SCDL from above to configure slave1 to create and wire the calculator components.</P>
<P>Go to <A href="http://localhsot:8000/calculatorForm" class="external-link" rel="nofollow">http://localhsot:8000/calculatorForm</A> in a browser and see the form that drives the calculator sample. Type in a couple of numbers and press Add.</P>
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