Resolving Differences in Java Code Generated from WSDL with cxf-codegen Plugin Version 4.0.3

Discover how to fix structure changes and missing code when upgrading the cxf-codegen plugin for WSDL in Java projects.
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This video is based on the question https://stackoverflow.com/q/77323549/ asked by the user 'Muhammad bakr' ( https://stackoverflow.com/u/9549282/ ) and on the answer https://stackoverflow.com/a/77339304/ provided by the user 'Muhammad bakr' ( https://stackoverflow.com/u/9549282/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding Changes in Code Generation with the cxf-codegen Plugin

When working with web services in Java, the process of generating Java code from WSDL (Web Services Description Language) using tools like the cxf-codegen plugin is crucial. However, sometimes when upgrading plugin versions, developers can encounter unexpected issues such as altered file structures or missing code in generated classes. This post addresses such a scenario experienced after upgrading the cxf-codegen plugin from version 3.5.5 to 4.0.3.

The Problem: Unexpected Changes in Generated Code

After the upgrade, the structure of the generated files drastically changed, leading to confusion and hindrances in the development process. Below is a comparison of the file structures before and after the upgrade:

Before Upgrade (Version 3.5.5)

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After Upgrade (Version 4.0.3)

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As we can see, the client.customeragreement package disappeared, and with it, the classes that were expected to be present.

Investigating the Cause

The root cause of this issue turned out to lie within the service_mapping.xml file that the cxf-codegen plugin uses. This XML file is essential for defining how Java classes should be generated from a WSDL file, including package names and bindings for the generated Java code.

Original service_mapping.xml Configuration

Here’s the original configuration that might not suffice for the updated plugin:

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The Solution: Updating service_mapping.xml

To address the issue and ensure that the Java classes are generated correctly, the service_mapping.xml must be revised to reflect the updated namespace for the jaxws bindings. Here is the corrected version:

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Key Changes Made

The xmlns:jaxws attribute was updated from http://java.sun.com/xml/ns/jaxws to the new Jakarta namespace https://jakarta.ee/xml/ns/jaxws. This is crucial for the new version of the CXF plugin, as it recognizes the new namespace standards.

Conclusion

When upgrading the cxf-codegen plugin, it is vital to be aware of corresponding updates in your configuration files. Missing code or an altered structure can often be traced back to outdated XML configurations. By ensuring that your service_mapping.xml reflects the correct namespaces and bindings, you can restore the expected functionality and improve your development workflow. Happy coding!