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From "Jarek Gawor (JIRA)" <>
Subject [jira] Commented: (GERONIMO-4131) Problems with WebSphere MQ RA deployment
Date Tue, 15 Jul 2008 15:19:31 GMT


Jarek Gawor commented on GERONIMO-4131:

There are two main issues as I understand it:

1) First, the resource adapter class has multiple setters for the same property and a getter
for that property that returns a primitive type. The ConnectorModuleBuilder.setUpDynamicGBean()
sets up a dynamic gbean with attribute types based on the return types of the getter methods
and the ConnectorModuleBuilder.getValue() tries to convert the property value specified in
the deployment descriptor into the value of expected type. Now, since the expected type is
a primitive type, the classLoader.loadClass fails. That explains the initial "Could not load
attribute class:  type: int" error.

The simplest solution for this problem is to map all the primitive types into their corresponding
complex types.

2) The second problem, after fixing the first issue, is that connector deployment might fail
with "java.lang.ClassCastException" errors while setting the attributes on the dynamic gbean.
The problem is in It creates a separate propertyName->operation
map for all getters and all setters. The problem arises if there are multiple setters for
the same property. Only the last setter method discovered will be stored in the setters map.
So, when an attribute is being set (using the setAttribute() method) a wrong setter method
might be used for the value (type) being passed. That explains the "java.lang.ClassCastException"

The solution for that problem is to change to support multiple setters
and to pick the right setter based on the type of the value passed in when setting an attribute
on the dynamic gbean.

> Problems with WebSphere MQ RA deployment
> ----------------------------------------
>                 Key: GERONIMO-4131
>                 URL:
>             Project: Geronimo
>          Issue Type: Bug
>      Security Level: public(Regular issues) 
>          Components: connector
>    Affects Versions: 2.0.1, 2.0.2, 2.1, 2.1.1, 2.1.2
>            Reporter: Kevan Miller
>            Assignee: Jarek Gawor
>             Fix For: 2.1.2
> A user reported problems deploying an MQ RA on Geronimo. Looks like there are several
> 1) we don't like config-property-name values in ra.xml to start with a lower case letter
> 2) our mechanism for introspecting the implementation classes (e.g. managedconnectionfactory-class)
is not working properly. there can be multiple "set" methods taking different parameter types.
This is leading to type-mismatches as we try to set attributes.

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