Re: Passing classes to ejb methods as parameters

[Thompson, Chris]

Title: Passing classes to ejb methods as parameters

Hi,

 

Perhaps you should try adding your implementation for Serializable, readObject() and writeObject().  The arguments and return values for your ejb methods do need to serializable or externalizable when you are calling methods across jvms.

 

-Chris

-----Original Message-----
From: Martin Welch [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, December 19, 2001 8:12 AM
Subject: Passing classes to ejb methods as parameters

Hi,

I'm slighly baffled by the do's and don'ts of passing classes to ejb methods as parameters.

I've got a simple class:

public class Task implements Serializable
{
    public String  Description = "";
    public String  Project = "";
    public int     ProjectId = -1;
    public int     TaskId = -1;
    public boolean Dirty = true;

    public Vector  Hours = new Vector();

    public Task()
    {
        // A task always contains seven Time objects - one for each
        // day of the week where [0] - Monday, [1] - Tuesday, etc.
        for ( int i = 0; i < 7; i++ )
            Hours.add(new Time());
    }
}

I want to pass this to a method on an bmp ejb. If this class is in the same package and jar as the ejb it all works on JBoss-2.4.0_Tomcat-3.2.2.

When I try to relocate this object to another package and jar the call fails in the client with a UndeclaredThrowableException. The jar containing the class is in my jboss's deploy and deploy\lib directory.

A colleague of mine hit the same problem but this time with Weblogic 5.1 although the error he got was different.

I'm trying to establish if what I'm trying to do is just wrong or some deployment / configuration problem.

Could someone enlighten me?

Thanks,

Martin