Harmonize Discover the HTTP Port at Runtime How-To

See gh-22898

Harmonize Discover the HTTP Port at Runtime How-To
See gh-22898
303768b2 · John Franco · Stephane Nicoll · cdbb7f44 · 303768b2
Commit 303768b2 authored Aug 12, 2020 by John Franco Committed by Stephane Nicoll Aug 12, 2020
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@@ -498,7 +498,7 @@ To scan for a free port (using OS natives to prevent clashes) use `server.port=0
 [[howto-discover-the-http-port-at-runtime]]
 === Discover the HTTP Port at Runtime
 You can access the port the server is running on from log output or from the `ServletWebServerApplicationContext` through its `WebServer`.
-The best way to get that and be sure that it has been initialized is to add a `@Bean` of type `ApplicationListener<ServletWebServerInitializedEvent>` and pull the container out of the event when it is published.
+The best way to get that and be sure that it has been initialized is to add a `@Bean` of type `ApplicationListener<ServletWebServerInitializedEvent>`  (or `ApplicationListener<ReactiveWebServerInitializedEvent>` for reactive servers) and pull the container out of the event when it is published.

 Tests that use `@SpringBootTest(webEnvironment=WebEnvironment.RANDOM_PORT)` can also inject the actual port into a field by using the `@LocalServerPort` annotation, as shown in the following example: