Jakarta WebSocket

This feature enables support for WebSocket applications written to the API for the Jakarta WebSocket 2.1 specification.

If you are updating your application from using the websocket-2.0 feature to using the websocket-2.1 feature, changes in API behavior might require you to update your application code. For more information, see Differences between Jakarta WebSocket 2.1 and 2.0.

Enabling this feature

To enable the Jakarta WebSocket 2.1 feature, add the following element declaration into your server.xml file, inside the featureManager element:


Feature configuration elements

Standard API packages provided by this feature

  • jakarta.websocket

  • jakarta.websocket.server

Liberty API packages provided by this feature

Features that this feature enables

Supported Java versions

  • JavaSE-11.0

  • JavaSE-17.0

  • JavaSE-21.0

Features that enable this feature

Developing a feature that depends on this feature

If you are developing a feature that depends on this feature, include the following item in the Subsystem-Content header in your feature manifest file.

io.openliberty.websocket-2.1; type="osgi.subsystem.feature"