Re: Working with related beans

Álvaro Martínez Thu, 13 Dec 2007 09:46:31 -0800

Raymond Feng escribió:

Hi,

I think you hit an issue we recently discussed on the mailing list [1]. To work around the problem, can you try to add "implements Serializable" to your beans for now?

[1] http://www.mail-archive.com/[EMAIL PROTECTED]/msg26191.html

Thanks,
Raymond 
  ----- Original Message ----- 
  From: Álvaro Martínez 
  To: [email protected] 
  Sent: Thursday, December 13, 2007 9:05 AM
  Subject: Re: Working with related beans

  Simon Laws escribió: 
On Dec 13, 2007 3:19 PM, Álvaro Martínez <[EMAIL PROTECTED]> wrote:

  Hi, I'm a newbie to Apache Tuscany and I have a very dumb doubt... I
think.

My question is: how can I use related beans when calling web services
(as parameters) or on return from them. By "related" I mean specifically
that one Client has a set of Vehicles, and these own a set of Devices.
That is, beans with a "to-many" relation inside regarding other beans.

I tried to use a plain Java array but doesn't seem to work.

Thanks!

-----------------------Álvaro Martínez Hernández,Push The Button, S.L.

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Hi Alvaro, welcome to Tuscany. There's no such thing as a dumb question;-)

I think the answer in this case is yes you should be able to pass trees of
java objects across services interfaces. Can I ask, is the web service you
are trying to communicate with also implemented with Tuscany or is it a web
service that someone else is providing. If the former what does the service
interface look like? If the latter do you have a WSDL description of the
service that we can see? Also are you able to show us the code that is
making the service call and can you give us some more details about  the
errors you are getting.

Regards

Simon

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  Thank you very much for your quick answer, Laws.

  First of all let me explain that I'm trying to do this automatically. I'm sure it can be done with a custom WSDL, but I like Tuscany for its abstraction, I don't want to loose it.

  Actually I'm developing both server and client sides, so I have total control over the transaction. The exception that client sees is:

  Exception in thread "main" java.lang.IllegalArgumentException: Pass-by-value is not supported for the given object
      at org.apache.tuscany.sca.databinding.javabeans.JavaBeansDataBinding.copy(JavaBeansDataBinding.java:84)
      at org.apache.tuscany.sca.databinding.DefaultDataBindingExtensionPoint$LazyDataBinding.copy(DefaultDataBindingExtensionPoint.java:171)
      at org.apache.tuscany.sca.core.databinding.wire.PassByValueInteceptor.copy(PassByValueInteceptor.java:90)
      at org.apache.tuscany.sca.core.databinding.wire.PassByValueInteceptor.invoke(PassByValueInteceptor.java:54)
      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 $Proxy6.createClient(Unknown Source)
      at com.ptb.ws.gw.AdministrationApp.main(AdministrationApp.java:23)
      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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)
  Caused by: java.lang.IllegalArgumentException: Argument type 'com.ptb.commons.beans.GwClient' is not Serializable.  Pass-by-value cannot be performed on this argument
      at org.apache.tuscany.sca.databinding.javabeans.JavaBeansDataBinding.copy(JavaBeansDataBinding.java:80)
      ... 12 more

  Such class GwClient follows:

  public class GwClient {

      protected String id = null;
      protected String name = null;
      protected String user = null;
      protected String password = null;
      protected int inputQueueCheckInterval = 0;
      protected int modemCheckInterval = 0;
      protected int outputQueueCheckInterval = 0;
      protected DeviceConf[] defaultConfs = null;
      protected Modem[] modems = null;
      protected InputQueue[] inputQueues = null;
      protected OutputQueue[] outputQueues = null;
      protected MobileResource[] mobileResources = null;

  (The rest is just get/set methods).

  I won't bore you with related beans because all own just simple types and arrays of beans.

  What am I doing wrong?

  Thanks!

  -----------------------Álvaro Martínez Hernández, Push The Button, S.L., Spain

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Version: 7.5.503 / Virus Database: 269.16.17/1179 - Release Date: 09/12/2007 11:06

That was *exactly* the problem. So for anyone who gets this situation in the future, remember:

- You must implement get/set methods for your arrays of beans.

- Your beans must implement Serializable (not necessary to implement the method)

- You can use ArrayList or whatever.

Thanks a lot, that was a hard issue for me to figure out alone.

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Re: Working with related beans

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