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title: Migrating Connectors and Modules to Mule 4
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# Migrating Connectors and Modules to Mule 4

> For the full documentation index, see: https://docs.mulesoft.com/llms.txt

This section covers the migration of connector-specific features and lists connectors that are
deprecated or removed from Mule 4.

## Deprecated or Removed Connectors

The following table shows deprecated/removed Mule 3.x modules and how to replace them in Mule 4.0.

<table><colgroup><col> <col></colgroup><thead><tr><th>Mule 3.x Module</th><th>Mule 4.0 Replacement</th></tr></thead><tbody><tr><td><p>Ajax</p></td><td><p>Use APIkit + standard REST.</p></td></tr><tr><td><p>Atom</p></td><td><p>Replaced with HTTP + DataWeave.</p></td></tr><tr><td><p>Axis</p></td><td><p>Use Web Service Consumer / APIkit for SOAP.</p></td></tr><tr><td><p>BPM</p></td><td><p>MuleSoft now provides connectivity to Pega or Appian for BPM.</p></td></tr><tr><td><p>CXF</p></td><td><p>Use Web Service Consumer.</p></td></tr><tr><td><p>Drools</p></td><td><p>Removed.</p></td></tr><tr><td><p>EJB</p></td><td><p>Removed.</p></td></tr><tr><td><p>Guice</p></td><td><p>Removed.</p></td></tr><tr><td><p>jBPM</p></td><td><p>MuleSoft now provides connectivity to Pega or Appian for BPM.</p></td></tr><tr><td><p>Jetty</p></td><td><p>Use new HTTP module.</p></td></tr><tr><td><p>OGNL</p></td><td><p>Replaced DataWeave expression language, or MEL in compatibility module.</p></td></tr><tr><td><p>Patterns</p></td><td><p>Removed. Use flows instead.</p></td></tr><tr><td><p>Quartz</p></td><td><p>Use new Scheduler component.</p></td></tr><tr><td><p>RSS</p></td><td><p>Use HTTP + DataWeave.</p></td></tr><tr><td><p>Servlet</p></td><td><p>New embedded mode in development.</p></td></tr><tr><td><p>Stdio</p></td><td><p>Removed.</p></td></tr><tr><td><p>SXC</p></td><td><p>Use DataWeave.</p></td></tr><tr><td><p>Tomcat</p></td><td><p>New embedded mode in development.</p></td></tr><tr><td><p>UDP</p></td><td><p>Use Sockets connector.</p></td></tr><tr><td><p>XMPP</p></td><td><p>Removed.</p></td></tr></tbody></table>