# DWR4 - converter issue

**URL:** <https://discourse.dojo.io/t/dwr4-converter-issue/624>\
**Category:** DWR users\
**Created:** [February 2, 2024, 4:11pm UTC](https://discourse.dojo.io/t/dwr4-converter-issue/624 "2024-02-02T16:11:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![raduten](https://avatars.discourse-cdn.com/v4/letter/r/8dc957/32.png) [@raduten](https://discourse.dojo.io/u/raduten)\
**Post date:** [February 2, 2024, 4:11pm UTC](https://discourse.dojo.io/t/dwr4-converter-issue/624/1 "2024-02-02T16:11:32Z")

</div>

Hi - I am in the process of migrating an old jboss7/java8/dwr3 project to wildfly30/java21 . I have found dwr4 on github [GitHub - directwebremoting/dwr: Direct Web Remoting - Easy Ajax for Java](https://github.com/directwebremoting/dwr) that already is modified to work with new servlet6 (jakarta.\* instead of javax\*).

My application is an ear with multiple wars and ejbs bundled together inside the same ear.

I am having issues with converters for marshaling pojos.

For example in one of my wars, this is a request from server:

```auto
callCount=1
c0-scriptName=StudiesDWRManager
c0-methodName=getStudies
c0-id=0
c0-e1=number:1
c0-e2=number:0
c0-e3=number:50
c0-e6=string:studyDatetime
c0-e7=string:DESC
c0-e5=Object_Object:{property:reference:c0-e6, direction:reference:c0-e7}
c0-e4=array:[reference:c0-e5]
c0-param0=Object_Object:{page:reference:c0-e1, start:reference:c0-e2, limit:reference:c0-e3, sorters:reference:c0-e4}
batchId=3
instanceId=0
page=%2F
scriptSessionId=D803~ijKHLTVengL5C7BPJH69TUV6XwyGRo/xbiAGRo-pBcDiDuH3

```

This should marshal into

```auto
@DataTransferObject(converter = BeanConverter.class)
public class ExtJsStoreParams {
    private Integer start;

    private Integer limit;

    private Integer page;

    private Map<String, String>[] sorters;

    private Map<String, String>[] filters;

-> has proper getters and setters

```

As you can see I have the @DataTransferObject annotation.

I also have in dwr.xml:

```auto
<dwr>
    <allow>
        <convert match="java.lang.Exception" converter="exception">
            <param name='include' value='message' />
        </convert>
        <convert match="com.bellybaloo.server.webapps.studies.dwr.ExtJsStoreParams" converter="bean" />
    </allow>
</dwr>

```

But still, when javascript tries to call this dwr method, there is an error in logs:

```auto
16:05:13,467 WARN [org.directwebremoting.extend.Call] (default task-5) No methods called 'getStudies' in NewCreator for com.bellybaloo.server.webapps.studies.StudiesDWRManager are applicable for the passed parameters.

```

Of course, nothing gets sent.

Debugging inside dwr classes, I can see there are no converters registered into dwr, even if I have them annotated and in dwr.xml.

Any ideas regarding what I can try next?

Thanks!