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jettyembedded-jetty

Why do embedded Jetty examples do server.dump(System.err)?

All the examples of embedded Jetty I see do server.dump(System.err). I can't find any docs on what that does or why.

Solution

  • When you see server.dump(System.err) this is a dump of the state of the Server object to the System.err console appendable.

    Jetty operates on a LifeCycle model, where every component can be started and stopped and has the ability to track its state.

    The Server object is a specialized ContainerLifeCycle which operates like all other LifeCycle objects but also has child beans that follow the LifeCycle behaviors.

    The call server.dump(System.err) is actually the ContainerLifeCycle.dump(Appendable) call for the Server.

    This top level Server dump is called The Jetty Dump Tool. See https://www.eclipse.org/jetty/documentation/current/jetty-dump-tool.html for details, including a sample output.