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Posted to dev@tuscany.apache.org by "Jean-Sebastien Delfino (JIRA)" <tu...@ws.apache.org> on 2007/09/13 07:01:32 UTC
[jira] Resolved: (TUSCANY-1398) Nested Callbacks Fail
[ https://issues.apache.org/jira/browse/TUSCANY-1398?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jean-Sebastien Delfino resolved TUSCANY-1398.
---------------------------------------------
Resolution: Fixed
> Nested Callbacks Fail
> ---------------------
>
> Key: TUSCANY-1398
> URL: https://issues.apache.org/jira/browse/TUSCANY-1398
> Project: Tuscany
> Issue Type: Bug
> Components: Java SCA Java Implementation Extension
> Affects Versions: Java-SCA-0.90, Java-SCA-Next
> Reporter: York (He Yuan) HUANG
> Fix For: Java-SCA-Next
>
> Attachments: non-block-orderprocess.zip
>
>
> I created a simple SCA application, which involves an order process. The application was attached. Below is the composite file of the application. Note that, the callback method of Supplier will invoke the callback interface of Customer. Thus, there are nested callbacks.
> <?xml version="1.0" encoding="UTF-8"?>
> <composite xmlns="http://www.osoa.org/xmlns/sca/1.0"
> targetNamespace="http://orderprocess"
> xmlns:cb="http://orderprocess"
> name="orderprocess">
> <component name="Customer">
> <implementation.java class="orderprocess.CustomerImpl"/>
> <reference name="supplier" target="Supplier/Order">
> <interface.java interface="orderprocess.Order" callbackInterface="orderprocess.OrderNotification"/>
> </reference>
> </component>
> <component name="Supplier">
> <service name="Order">
> <interface.java interface="orderprocess.Order" callbackInterface="orderprocess.OrderNotification"/>
> </service>
> <implementation.java class="orderprocess.SupplierImpl"/>
> <reference name="railway" target="RailwayTransport/Shipment">
> <interface.java interface="orderprocess.Shipment" callbackInterface="orderprocess.ShipmentNotification"/>
> </reference>
> <reference name="highway" target="HighwayTransport">
> <interface.java interface="orderprocess.Shipment" callbackInterface="orderprocess.ShipmentNotification"/>
> </reference>
> </component>
>
> <component name="HighwayTransport">
> <service name="Shipment">
> <interface.java interface="orderprocess.Shipment" callbackInterface="orderprocess.ShipmentNotification"/>
> </service>
> <implementation.java class="orderprocess.HighwayTransport"/>
> <property name="period">5000</property>
> </component>
>
> <component name="RailwayTransport">
> <service name="Shipment">
> <interface.java interface="orderprocess.Shipment" callbackInterface="orderprocess.ShipmentNotification"/>
> </service>
> <implementation.java class="orderprocess.RaiwayTransport"/>
> <property name="period">1000</property>
> </component>
>
> </composite>
> However, the application fails on both SCA Java 0.90 and trunk. Below is the error message. When I debugged the application, I found that it might be caused by wrong "from" info in ThreadMessageContext.
> java.lang.NullPointerException
> at org.apache.tuscany.sca.core.invocation.JDKCallbackInvocationHandler.invoke(JDKCallbackInvocationHandler.java:77)
> at $Proxy11.notify(Unknown Source)
> at orderprocess.SupplierImpl.notify(SupplierImpl.java:70)
> 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:585)
> at org.apache.tuscany.sca.implementation.java.invocation.JavaTargetInvoker.invokeTarget(JavaTargetInvoker.java:112)
> at org.apache.tuscany.sca.implementation.java.invocation.JavaTargetInvoker.invoke(JavaTargetInvoker.java:134)
> at org.apache.tuscany.sca.implementation.java.invocation.TargetInvokerInvoker.invoke(TargetInvokerInvoker.java:46)
> at org.apache.tuscany.sca.core.invocation.AbstractInvocationHandler.invoke(AbstractInvocationHandler.java:84)
> at org.apache.tuscany.sca.core.invocation.JDKCallbackInvocationHandler.invoke(JDKCallbackInvocationHandler.java:85)
> at $Proxy13.notify(Unknown Source)
> at orderprocess.RaiwayTransport.doShipping(RaiwayTransport.java:56)
> 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:585)
> at org.apache.tuscany.sca.implementation.java.invocation.JavaTargetInvoker.invokeTarget(JavaTargetInvoker.java:112)
> at org.apache.tuscany.sca.implementation.java.invocation.JavaTargetInvoker.invoke(JavaTargetInvoker.java:134)RuntimeException invoking receiveResult: java.lang.NullPointerException
> at org.apache.tuscany.sca.implementation.java.invocation.TargetInvokerInvoker.invoke(TargetInvokerInvoker.java:46)
> at org.apache.tuscany.sca.core.invocation.NonBlockingInterceptor$1.run(NonBlockingInterceptor.java:68)
> at org.apache.tuscany.sca.core.work.Jsr237Work.run(Jsr237Work.java:61)
> at org.apache.tuscany.sca.core.work.ThreadPoolWorkManager$DecoratingWork.run(ThreadPoolWorkManager.java:206)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
> at java.lang.Thread.run(Thread.java:595)
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