That makes sense. Thanks for the reply. My follow-up question is regarding the composite file in the user's guide on the Tuscany website regarding the calculator example.
In the file: <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"; name="Calculator"> <service name="CalculatorService" promote="CalculatorServiceComponent/CalculatorService"> <interface.java interface="calculator.CalculatorService"/> <binding.jsonrpc/> </service> <component name="CalculatorServiceComponent"> <implementation.java class="calculator.CalculatorServiceImpl"/> <reference name="addService" target="AddServiceComponent" /> </component> <component name="AddServiceComponent"> <implementation.java class="calculator.AddServiceImpl"/> </component> </composite> In this example, in the first service, they promote CalculatorServiceComponent/CalculatorService, but when I run the project, I get the following error: Promoted component service not found: CalculatorServiceComponent/CalculatorService null Am I missing something here? In the promote, I see it refers to the CalculatorServiceComponent, but I don't see where the CalculatorService comes from following that. Also, am I correct is saying what it is trying to do is expose the CalculatorServiceComponent as a Service on the Composite? Thanks again. -Jason ############################################################################ ############################################################################ ######### This electronic mail transmission contains confidential information intended only for the person(s) named. Any use, distribution, copying or disclosure by another person is strictly prohibited. ############################################################################ ############################################################################ ######### -----Original Message----- From: Raymond Feng [mailto:[EMAIL PROTECTED] Sent: Friday, October 12, 2007 12:50 PM To: tuscany-user@ws.apache.org Subject: Re: Promote? Hi, A SCA composite can be used as an implementation (implementation.composite) for a component. This is so-called recursive composition. It allows pre-assembled composites to be reused. "promote" can be used to make services or references declared on a component inside the composite visible for wiring at the composite level. The composite services and references can be then further configured when it's used as a component implementation at outer level. Hope the following samples help. <composite name="Composite1" xmlns:ns="http://dummy";> <component name="C1"> <implementation.composite name="ns:Composite2"> <!-- wire ref1 to component C3's service1 --> <reference name="ref1" target="C3/service1"/> <!-- configure the service with ws binding --> <service name="svc1"> <binding.ws .../> </service> </component> </composite> <composite name="Composite2" targetNamespace="http://dummy"; xmlns:ns="http://dummy";> <component name="C2"> <implementation.java class="my.C2Impl"> </component> <!-- innerService of component C2 is promoted as svc1 --> <service name="svc1" promote="C2/innerService"/> <!-- innerReference of component C2 is promoted as ref1 --> <reference name="ref1" promote="C2/innerReference"/> </composite> Thanks, Raymond ----- Original Message ----- From: "Jason Clark" <[EMAIL PROTECTED]> To: <tuscany-user@ws.apache.org> Sent: Friday, October 12, 2007 2:21 PM Subject: Promote? > Hello all. I am trying to understand what the promote keyword in the > composite file means? I've so far been able to find a definition of that, > and the composite file in general. > > > > Thanks, > > > > Jason > > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
