Jean-Sebastien Delfino wrote:
Jean-Sebastien Delfino wrote:
I'm trying to add some support for business objects to the Tutorial
(instead of just flowing the catalog and cart items as strings).
My business objects are simple JavaBeans with an empty constructor.
I need to flow them as Java objects through local service calls,
XML (in Atom payloads) and JSON.
It should have been a simple exercise, but I've been running into a
number of issues with the DataBinding framework. Here they are:
1. Some of the Bean2* and *2Bean transformers were missing to
META-INF/services I added them.
2. The Databinding framework was not finding the transformers in
XML <-> registrations. I changed all instances of java.lang.String
to xml.string in the registrations of the *2String and String2*
transformer to fix that.
3. Next I ran into a ClassCastException in XML2JavaBeanTransformer at
public Object transform(T source, TransformationContext context) {
- -> XMLType xmlType = (XMLType)
context.getSourceDataType().getLogical();
as the logical type was Class instead of XMLType
4. I had to add "implements Serializable" to my business object
class as it looks like we are using Java serialization to enforce
pass by value in local service calls. I don't think it's right as
we are not using Java serialization to pass the same business
object through a remote call. We should change to use the same XML
transformation to enforce pass by value with local calls as well,
and not require the business objects to be Serializable.
5. After changes (1), (2), (3) and (4) I am now running into a
build issue:
testTransform1(org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase)
Time elapsed: 0.02 sec <<< ERROR!
java.lang.ClassCastException:
org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer
cannot be cast to
org.apache.tuscany.sca.databinding.DataPipeTransformer
at
org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:75)
at
org.apache.tuscany.sca.databinding.impl.MediatorImplTestCase.testTransform1(MediatorImplTestCase.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at
org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
at
org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
at
org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
I'm getting to the end of the rope here... does anyone know what
can cause error (5)?
Thanks
A little more info:
The ClassCastException is on:
} else if (transformer instanceof PushTransformer) {
DataPipeTransformer dataPipeFactory = (i < size - 1)
? (DataPipeTransformer)path.get(++i) : null;
path =
[EMAIL PROTECTED],
[EMAIL PROTECTED];className=org.apache.tuscany.sca.databinding.xml.SAX2DOMPipe]
sourceDataType = class java.lang.String java.lang.String class
java.lang.String
targetDataType = interface org.w3c.dom.Node org.w3c.dom.Node
interface org.w3c.dom.Node
Next stop on the road to databinding happiness: Revert changes (2)
as registering the transformers with xml.string seems to confuse all
the code that uses java.lang.String instead of xml.string as
databinding name or id.
I then get the following exception:
Running
org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase
info: Added Servlet mapping:
http://delfinoj60.burlingame.ibm.com:8085/helloWorld
info: Added Servlet mapping:
http://delfinoj60.burlingame.ibm.com:8085/Echo
info: Added Servlet mapping:
http://delfinoj60.burlingame.ibm.com:8085/helloWorld
info: Added Servlet mapping:
http://delfinoj60.burlingame.ibm.com:8085/Echo
severe:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
org.osoa.sca.ServiceRuntimeException:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:127)
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:89)
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:83)
at
org.apache.tuscany.sca.core.assembly.RuntimeWireImpl.invoke(RuntimeWireImpl.java:127)
at
org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceProvider.invokeTarget(Axis2ServiceProvider.java:567)
at
org.apache.tuscany.sca.binding.ws.axis2.Axis2ServiceInOutSyncMessageReceiver.invokeBusinessLogic(Axis2ServiceInOutSyncMessageReceiver.java:59)
at
org.apache.axis2.receivers.AbstractInOutSyncMessageReceiver.invokeBusinessLogic(AbstractInOutSyncMessageReceiver.java:42)
at
org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:96)
at
org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:145)
at
org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:275)
at
org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:120)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:367)
at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
at org.mortbay.jetty.Server.handle(Server.java:285)
at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:502)
at
org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:835)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:641)
at
org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:208)
at
org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:378)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:368)
at
org.apache.tuscany.sca.core.work.Jsr237Work.run(Jsr237Work.java:61)
at
org.apache.tuscany.sca.core.work.ThreadPoolWorkManager$DecoratingWork.run(ThreadPoolWorkManager.java:205)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)
Caused by:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:110)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.toJavaObject(XML2JavaBeanTransformer.java:67)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.transform(XML2JavaBeanTransformer.java:59)
at
org.apache.tuscany.sca.databinding.DefaultTransformerExtensionPoint$LazyPullTransformer.transform(DefaultTransformerExtensionPoint.java:194)
at
org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
at
org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:177)
at
org.apache.tuscany.sca.core.databinding.transformers.Input2InputTransformer.transform(Input2InputTransformer.java:43)
at
org.apache.tuscany.sca.databinding.impl.MediatorImpl.mediate(MediatorImpl.java:73)
at
org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.transform(DataTransformationInterceptor.java:175)
at
org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:72)
at
org.apache.tuscany.sca.core.invocation.RuntimeWireInvoker.invoke(RuntimeWireInvoker.java:118)
... 29 more
Caused by: java.lang.NullPointerException
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:76)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.setFieldValueUsingSetter(XML2JavaBeanTransformer.java:164)
at
org.apache.tuscany.sca.databinding.javabeans.XML2JavaBeanTransformer.createJavaObject(XML2JavaBeanTransformer.java:97)
... 39 more
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed:
15.143 sec <<< FAILURE!
testEchoFoo(org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase)
Time elapsed: 1.218 sec <<< ERROR!
java.lang.reflect.UndeclaredThrowableException
at $Proxy7.echoFoo(Unknown Source)
at
org.apache.tuscany.sca.binding.ws.axis2.itests.EchoComponent.echoFoo(EchoComponent.java:30)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.tuscany.sca.implementation.java.invocation.JavaImplementationInvoker.invoke(JavaImplementationInvoker.java:105)
at
org.apache.tuscany.sca.core.databinding.wire.PassByValueInterceptor.invoke(PassByValueInterceptor.java:49)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
at $Proxy7.echoFoo(Unknown Source)
at
org.apache.tuscany.sca.binding.ws.axis2.itests.HelloWorldNoWSDLTestCase.testEchoFoo(HelloWorldNoWSDLTestCase.java:54)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:168)
at junit.framework.TestCase.runBare(TestCase.java:134)
at junit.framework.TestResult$1.protect(TestResult.java:110)
at junit.framework.TestResult.runProtected(TestResult.java:128)
at junit.framework.TestResult.run(TestResult.java:113)
at junit.framework.TestCase.run(TestCase.java:124)
at junit.framework.TestSuite.runTest(TestSuite.java:232)
at junit.framework.TestSuite.run(TestSuite.java:227)
at
org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
at
org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:62)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.executeTestSet(AbstractDirectoryTestSuite.java:138)
at
org.apache.maven.surefire.suite.AbstractDirectoryTestSuite.execute(AbstractDirectoryTestSuite.java:125)
at org.apache.maven.surefire.Surefire.run(Surefire.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.apache.maven.surefire.booter.SurefireBooter.runSuitesInProcess(SurefireBooter.java:299)
at
org.apache.maven.surefire.booter.SurefireBooter.main(SurefireBooter.java:837)
Caused by: org.apache.tuscany.sca.interfacedef.util.FaultException:
org.apache.tuscany.sca.databinding.javabeans.XML2JavaMapperException:
java.lang.NullPointerException <bars> in <class
org.apache.tuscany.sca.binding.ws.axis2.itests.Foo>
at
org.apache.tuscany.sca.binding.ws.axis2.Axis2BindingInvoker.invoke(Axis2BindingInvoker.java:79)
at
org.apache.tuscany.sca.core.databinding.wire.DataTransformationInterceptor.invoke(DataTransformationInterceptor.java:74)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:233)
at
org.apache.tuscany.sca.core.invocation.JDKInvocationHandler.invoke(JDKInvocationHandler.java:130)
... 35 more
caused by that line in
databinding/src/main/resources/META-INF/services/org.apache.tuscany.sca.databinding.PullTransformer:
org.apache.tuscany.sca.databinding.javabeans.JavaBean2XMLStreamReader;source=java:complexType,target=javax.xml.stream.XMLStreamReader,weight=79000
I had added that line to use JavaBean2XMLStreamReader instead of
JavaBean2DOMNodeTransformer, as going through a DOM is not the most
optimized path from a JavaBean to XML :) but it looks like
JavaBean2XMLStreamReader does not work as well as
JavaBean2DOMNodeTransformer... After removing it the build is
successful again.
--
Jean-Sebastien
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