How to discover embedded Jetty port after requesting random available port?

Question

Server server = new Server(0);   
(..)
server.start();
// this returns _zero_ ?!?!
int listeningPort = server.getConnectors()[0].getPort();

I'm using embedded Jetty 7 API. Passing zero to the Server(int) constructor cause Jetty to assign an available port automatically, how can i discover which port was assigned?

I have read the docs, but cannot find this info.

thanks..

Solution 1

The function getPort() returns the configured value.

Try server.getConnectors()[0].getLocalPort() it should return the selected port.

For Jetty 9:

You need to use ((ServerConnector)server.getConnectors()[0]).getLocalPort().

In both cases: you need to call server.start() first.

Solution 2

In addition to @pascos answer, you can also get the seleted port by:

server.getURI().getPort(); // e.g: 44759

If you are interested to get the whole server URL (with port), you can do:

server.getURI().toString(); // e.g: http://127.0.0.1:44759/