Expose local port in EmbeddedServletContainer

spring-boot/src/main/java/org/springframework/boot/context/embedded/EmbeddedServletContainer.java

@@ -44,6 +44,10 @@ public interface EmbeddedServletContainer {
 		public void stop() throws EmbeddedServletContainerException {
 			// Do nothing
 		}
+
+		public int getPort() {
+			return 0;
+		}
 	};
 
 	/**
@@ -60,4 +64,9 @@ public interface EmbeddedServletContainer {
 	 */
 	void stop() throws EmbeddedServletContainerException;
 
+	/**
+	 * @return the port this server is listening on (or zero if none)
+	 */
+	int getPort();
+
 }

spring-boot/src/main/java/org/springframework/boot/context/embedded/jetty/JettyEmbeddedServletContainer.java

@@ -109,6 +109,16 @@ public class JettyEmbeddedServletContainer implements EmbeddedServletContainer {
 		}
 	}
 
+	@Override
+	public int getPort() {
+		Connector[] connectors = this.server.getConnectors();
+		for (Connector connector : connectors) {
+			// Probably only one...
+			return connector.getLocalPort();
+		}
+		return 0;
+	}
+
 	/**
 	 * Returns access to the underlying Jetty Server.
 	 */

spring-boot/src/main/java/org/springframework/boot/context/embedded/tomcat/TomcatEmbeddedServletContainer.java

@@ -126,11 +126,20 @@ public class TomcatEmbeddedServletContainer implements EmbeddedServletContainer
 			this.tomcat.destroy();
 		}
 		catch (Exception ex) {
-			throw new EmbeddedServletContainerException(
+			throw new EmbeddedServletContainerException("Unable to stop embedded Tomcat",
-					"Unable to stop embedded Tomcat", ex);
+					ex);
 		}
 	}
 
+	@Override
+	public int getPort() {
+		Connector connector = this.tomcat.getConnector();
+		if (connector != null) {
+			return connector.getLocalPort();
+		}
+		return 0;
+	}
+
 	/**
 	 * Returns access to the underlying Tomcat server.
 	 */

spring-boot/src/test/java/org/springframework/boot/context/embedded/AbstractEmbeddedServletContainerFactoryTests.java

@@ -47,6 +47,7 @@ import org.springframework.util.StreamUtils;
 
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.notNullValue;
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertThat;
 import static org.mockito.Matchers.anyObject;
 import static org.mockito.Mockito.inOrder;
@@ -172,6 +173,7 @@ public abstract class AbstractEmbeddedServletContainerFactoryTests {
 				.getEmbeddedServletContainer(exampleServletRegistration());
 		this.container.start();
 		assertThat(getResponse("http://localhost:8081/hello"), equalTo("Hello World"));
+		assertEquals(8081, this.container.getPort());
 	}
 
 	@Test