Its hard to work out whats going on without seeing the code, would it
be possible for you to raise a JIRA and attach your source or the
built .war file to that so we can debug it ourselves? You can create a
jira at https://issues.apache.org/jira/browse/Tuscany
...ant
2010/7/21 Tyrone <tyroneg...@gmail.com>:
> Hi,
>
> I wrote one service "Service3", it uses remote web service "Service1"
> and "Service2".
> It works well when I start it in standalone JVM.
> Now I want to write a web client for "Service3".
> I read the webapps\helloworld-servlet and use implementation.web for the web
> client.
> But I met some problems.
> 1. My composite for the web client is like the following
> ---------------------------------------------------------------------------------------------------------------------------------------------------
> <component name="foo">
> <implementation.web web-uri=""/>
> <reference name="service3" target="Service3Component" />
> </component>
> <component name="Service3Component">
> <implementation.java class="Service3Impl"/>
> <reference name="service2">
> <interface.java interface="Service2Interface" />
> <binding.ws uri=uri of service2 />
> </reference>
> <reference name="service1">
> <interface.java interface="Service1Interface" />
> <binding.ws uri=uri of service1 />
> </reference>
> </component>
>
> //** Service2 interface
> public interface Service2Interface{
> public Message[] getMessages(UserData userData, int count);
> }
> -------------------------------------------------------------------------------------------------------------------------------------------------
> //** Service1 interface
> public interface Service1Interface{
> public String getResult(String iputText);
> }
>
> //** Service3 interface
> public interface Service3Interface{
> public String[] getProcessedResult(String username, String password,
> int count);
> }
>
> //** this service calls Service2 to get messages and send each message to
> Service1 to get
> // processed result. Service3 returns the processed result as a String
> array.
> public class Service3Impl implements Service3Interface{
> @Reference
> private Service2 service2;
> @Reference
> private Service1 service1;
>
> public String[] getProcessedResult(String username, String password,
> int count){
> UserData userData = new UserData();
> userData.setUsername(username);
> userData.setPassword(password);
> Message[] messages = service2.getMessages(userData, count);
> String[] result = new String[messages.length];
> for(int i=0; i < messages.length; i++){
> result[i] = service1.getResult( messages[i].getText() );
> }
> return result;
> }
> }
> --------------------------------------------------------------------------------------------------------------------------------------------------
> I used self defined POJOs in Service2Interface, such as Message and
> UserData.
> It works well in standalone JVM. I do not need to concern the
> transformation of self defined POJOs between Service3
> and Service2. It seems that Tuscany do these transformation itself...
> But when I use this in implementation.web, I got
> "java.lang.IllegalArgumentException: Argument is not an array" in
> Service3 at line "Message[] messages = service2.getMessages(userData,
> count);".
> I tried to comment this line and set the messages by myselt, then it
> works.
> I don't know why this exception happens. In standalone JVM it works well.
> Anyone please tell me....
>
> 2. In the webapps\helloworld-servlet sample, I copy all of the jar of
> 2.0.M5 into WEB-INF\lib(in eclipse)
> but it can not work.
> It works when I use the maven generated jar
> "tuscany-base-nodep-2.0-M5.jar" or "tuscany-base-2.0-M5.jar".
> This seems not make sense, I used the whole lib of 2.0.M5.
> Anbody can tell me why?
>
> PS. I use eclipse and have not learn maven until now.
> The error message is in the following
> -----------------------------------------------------------------------------------------------------------------------------------------------------
> INFO: StandardWrapper.Throwable
> java.lang.NullPointerException at
> org.apache.tuscany.sca.implementation.web.runtime.ComponentContextProxy.getService(ComponentContextProxy.java:66)
> at sample.HelloworldServlet.init(HelloworldServlet.java:46)
> at
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
> at
> org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
> at java.lang.Thread.run(Thread.java:619)
> 2010/7/21 下午 03:57:58 org.apache.catalina.core.StandardWrapperValve invoke
> INFO: Allocate exception for servlet HelloworldServlet
> java.lang.NullPointerException at
> org.apache.tuscany.sca.implementation.web.runtime.ComponentContextProxy.getService(ComponentContextProxy.java:66)
> at sample.HelloworldServlet.init(HelloworldServlet.java:46)
> at
> org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
> at
> org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
> at java.lang.Thread.run(Thread.java:619)
> -------------------------------------------------------------------------------------------------------------------------------------------------
>
> Thanks,
> Tyrone
>
