Yes exactly. I think thats an approach which fits in very well with SCA and web applications.
One note, is that 2.0-Beta2 is the current latest release so thats what you should move up to not M5 which is a little older now. ...ant On Tue, Apr 5, 2011 at 3:36 AM, Monosij Dutta-Roy <[email protected]> wrote: > hi Simon, AntElder - > Thanks for your responses. I will take a couple of days and reconfigure it > the way you mention with Tuscany 2.0 M5 and not M4. > I also wanted to ask - is this a 'proper' architectural approach in > developing a webapp? > My reasoning is - this approach could help me swap out the interface layer > (the webapp part of it) - with say Spring MVC or Struts or Guice and such. > And allow scaling of the other composites (components) across one or more > nodes. > Once i get this webapp going I would like to approach it from a Spring MVC > webapp perspective and keep the other composites as they are. > Just wondering if you think that - that is a good approach - or should I be > considering scaling and such from a different approach. > Thanks. > monosij > > On Mon, Apr 4, 2011 at 3:20 PM, ant elder <[email protected]> wrote: >> >> On Mon, Apr 4, 2011 at 6:00 PM, Monosij Dutta-Roy >> <[email protected]> wrote: >> > hi Raymond >> > Thanks for your response. I don't know if you got those composites from >> > the >> > war but here are my 3 composites attached. >> > I think the references are ok. I did make sure they are. >> > It is not the same as you show below - which means maybe there is maven >> > packaging issue? >> > The dependency is as follows: qmWebApp > qmController > entitBCA. >> > I did a mvn clean - and mvn package - before a mvn jetty:run >> > And to answer your ques - I have (as far as I understand) 1 web app - >> > with 2 >> > dependent components. >> > Yes they are to the same Jetty (under Maven). >> > Hope that helps. >> > I will be taking a look at the war file again and the composites in it >> > when >> > I get back later today. >> > Thanks a lot. >> > monosij >> > >> > On Mon, Apr 4, 2011 at 12:24 PM, Raymond Feng <[email protected]> >> > wrote: >> >> >> >> By looking at the web.composite file you have: >> >> <composite xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200903"; >> >> xmlns:tuscany="http://tuscany.apache.org/xmlns/sca/1.1"; >> >> targetNamespace="http://com.bca.app"; >> >> name="qmApp"> >> >> <!-- component name="qmAppWebComponent"> >> >> <implementation.web web-uri=""/> >> >> <reference name="service" target="QueryServiceComponent"/> >> >> </component> >> >> <component name="QueryControllerComponent"> >> >> <implementation.java class="com.bca.qm.QueryControllerImpl"/--> >> >> </component> >> >> <component name="QueryService"> >> >> <implementation.java >> >> class="com.bca.pearl.app.QueryServiceImpl"/> >> >> </component> >> >> </composite> >> >> There are two issues: >> >> 1) The target attribute doesn't match the component name (red) >> >> 2) There is no reference under QueryService component >> >> to QueryControllerComponent >> >> Thanks, >> >> Raymond >> >> ________________________________________________________________ >> >> Raymond Feng >> >> [email protected] >> >> Apache Tuscany PMC member and committer: tuscany.apache.org >> >> Co-author of Tuscany SCA In Action book: www.tuscanyinaction.com >> >> Personal Web Site: www.enjoyjava.com >> >> ________________________________________________________________ >> >> On Apr 4, 2011, at 8:33 AM, Monosij Dutta-Roy wrote: >> >> >> >> As requested here are the attached files. >> >> >> >> Thanks for taking a look at my war. Its attached along with the three >> >> composites and two contributions. >> >> It contains the dependent jars: entityBCA and qmController. >> >> The errors I get is in the earlier part of the thread. >> >> I am trying to create a basic db search app with three components. >> >> So the structure is as follows: >> >> ---------- >> >> entityBCA - domain.composite - sca-contribution.xml - pom.xml >> >> has domain objects such as patients, addresses. >> >> qmController - querycontroller.composite - sca-contribution.xml - >> >> pom.xml >> >> a search controller that has a searchComposer and searchExecutor. >> >> qmApp - web.composite - no sca-contribution.xml >> >> the webapp which passes the query to qmController >> >> ---------- >> >> What I was trying to figure out is - as you show in the examples - >> >> client >> >> do the entityBCA and qmController need to be loaded as nodes? Or does >> >> Tuscany within Jetty already do it? >> >> My goal is to keep the webapp framework - jsp / jsf and such completely >> >> separate from the core components such that the front end technologies >> >> can >> >> be changed while configuring the other components to be run in a >> >> distributed >> >> environment. >> >> ---------- >> >> My background is Java / C++ and somewhat new to the JEE frameworks such >> >> as >> >> Tuscany, Maven and such - so XML configs is a little new to me. >> >> Thanks a lot! >> >> monosij >> >> >> >> On Sun, Apr 3, 2011 at 10:26 AM, Simon Nash <[email protected]> wrote: >> >>> >> >>> Monosij Dutta-Roy wrote: >> >>>> >> >>>> New to Tuscany and following SCA in Action. Have a question on a >> >>>> webapp >> >>>> I created using the Maven tasks. >> >>>> The webapp works fine as a single composite - broken up by several >> >>>> components. >> >>>> ------------------------ >> >>>> However when I create several composites (different contributions >> >>>> using >> >>>> Maven tasks) and wire them together - again webapp compiles and sets >> >>>> up in >> >>>> Jetty fine. When I hit a component that has a reference in a separate >> >>>> composite I get an error as below: >> >>>> ------------------------ >> >>>> Problem accessing /qmApp/. Reason: >> >>>> org.oasisopen.sca.SCARuntimeException: Unable to bind >> >>>> (@31214809)EndpointReference: URI = >> >>>> QueryServiceComponent#reference(queryController) >> >>>> WIRED_TARGET_NOT_FOUND >> >>>> Target = (@3751575)Endpoint: URI = >> >>>> QueryController#service(QueryControllerService) [Unresolved] >> >>>> >> >>>> The QueryController/QueryControllerService is setup as a reference. >> >>>> ------------------------ >> >>>> Its a small app and I have looked at the configs in detail and think >> >>>> they are correct. Of course Maven compiles all of them fine - and as >> >>>> I said >> >>>> deploys fine as well. >> >>>> >> >>>> However I am not sure I am loading the QueryController (the other >> >>>> contribution/composite/reference - setup as a service) properly. I >> >>>> have >> >>>> checked the composite file quite thoroughly and relevant code. I can >> >>>> upload >> >>>> them if needed. >> >>>> ------------------------ >> >>>> I assume when the war is build all the dependent jars are packaged in >> >>>> by >> >>>> Maven and when Jetty starts the Tuscany API sorts out the >> >>>> dependencies? Or >> >>>> is there anything else I need to do for this quite simple setup? But >> >>>> a setup >> >>>> that involves a webapp with different contributions. >> >>>> >> >>>> The reason I ask is also because the webapp generated by Maven does >> >>>> not >> >>>> have a sca-contribution.xml file where I import / export other >> >>>> packages. >> >>>> ------------------------ >> >>>> Thanks. >> >>>> >> >>> It would be very useful if you could upload the failing war file. >> >>> This >> >>> might provide some important clues to the cause of the problem. >> >>> >> >>> Simon >> >>> >> >> >> >> >> >> >> >> >> >> <qmApp-1.0-SNAPSHOT.war><qmApp-1.0-SNAPSHOT.pom><entityBCA-1.0-SNAPSHOT.pom><qmController-1.0-SNAPSHOT.pom> >> > >> > >> >> Hi monosij, >> >> I don't think Tuscany 1.x or 2.0-M4 supported multiple SCA >> contribution within the WEB-INF/lib folder, there may be a way I'm not >> remembering but I don't think so. If you put SCA contributions jars >> into WEB-INF/lib they are just treated as regular jars not SCA >> contributions and any .composite or sca-contribution.xml files within >> are ignored. >> >> There is a way to do this since 2.0-M5 by putting the contributions >> into a folder name WEB-INF/sca-contributions. There is a sample which >> demonstrates this that we have just added to the trunk samples, so its >> pom.xml shows what you need to do, see >> >> https://svn.apache.org/repos/asf/tuscany/sca-java-2.x/trunk/samples/getting-started/helloworld-webapp/ >> >> Note that when you update to the later Tuscany 2.x releases that the >> SCA namespace changed so you will need to update your contributions. >> The change is in your .composite and sca-contribution.xml files should >> have xmlns="http://docs.oasis-open.org/ns/opencsa/sca/200912"; - note >> 12 at the end instead of the 03 that 2.0-M4 used. >> >> Give it a try with the latest Tuscany release - 2.0-Beta2 - and let us >> know how you get on. >> >> ...ant > >
