feat: Report application URL when application is started

flow-server/src/main/java/com/vaadin/flow/internal/DevModeHandlerManager.java

@@ -87,6 +87,16 @@ void initDevModeHandler(Set<Class<?>> classes, VaadinContext context)
      */
     void launchBrowserInDevelopmentMode(String url);
 
+    /**
+     * Sets the application URL for the given application.
+     * <p>
+     * This is only called if the URL is known.
+     *
+     * @param applicationUrl
+     *            the application url
+     */
+    void setApplicationUrl(String applicationUrl);
+
     /**
      * Gets the {@link DevModeHandler}.
      *

vaadin-dev-server/src/main/java/com/vaadin/base/devserver/DevModeHandlerManagerImpl.java

@@ -68,6 +68,9 @@ private static final class DevModeHandlerAlreadyStartedAttribute
     private BrowserLauncher browserLauncher;
     final private Set<Closeable> watchers = new HashSet<>();
 
+    private String applicationUrl;
+    private boolean fullyStarted = false;
+
     @Override
     public Class<?>[] getHandlesTypes() {
         return DevModeStartupListener.class.getAnnotation(HandlesTypes.class)
@@ -107,6 +110,7 @@ public void initDevModeHandler(Set<Class<?>> classes, VaadinContext context)
 
             startWatchingThemeFolder(context, config);
             watchExternalDependencies(context, config);
+            setFullyStarted(true);
         });
         setDevModeStarted(context);
         this.browserLauncher = new BrowserLauncher(context);
@@ -170,6 +174,23 @@ public void launchBrowserInDevelopmentMode(String url) {
         browserLauncher.launchBrowserInDevelopmentMode(url);
     }
 
+    @Override
+    public void setApplicationUrl(String applicationUrl) {
+        this.applicationUrl = applicationUrl;
+        reportApplicationUrl();
+    }
+
+    private void setFullyStarted(boolean fullyStarted) {
+        this.fullyStarted = fullyStarted;
+        reportApplicationUrl();
+    }
+
+    private void reportApplicationUrl() {
+        if (fullyStarted && applicationUrl != null) {
+            getLogger().info("Application running at {}", applicationUrl);
+        }
+    }
+
     private void setDevModeStarted(VaadinContext context) {
         context.setAttribute(DevModeHandlerAlreadyStartedAttribute.class,
                 new DevModeHandlerAlreadyStartedAttribute());

vaadin-spring/src/main/java/com/vaadin/flow/spring/DevModeBrowserLauncher.java

@@ -50,9 +50,8 @@ public void ready(ConfigurableApplicationContext context,
             VaadinConfigurationProperties properties = context
                     .getBean(VaadinConfigurationProperties.class);
 
-            if (properties.isLaunchBrowser()) {
-                launchBrowserInDevelopmentMode(context);
-            }
+            maybeLaunchBrowserInDevelopmentMode(context,
+                    properties.isLaunchBrowser());
         } catch (Exception e) {
             getLogger().debug("Failed to launch browser", e);
         }
@@ -66,8 +65,11 @@ public void ready(ConfigurableApplicationContext context,
      *
      * @param appContext
      *            the application context
+     * @param launch
+     *            true to launch the browser, false to only report the url
      */
-    private void launchBrowserInDevelopmentMode(ApplicationContext appContext) {
+    private void maybeLaunchBrowserInDevelopmentMode(
+            ApplicationContext appContext, boolean launch) {
         if (!(appContext instanceof GenericWebApplicationContext)) {
             getLogger().warn(
                     "Unable to determine production mode for an Spring Boot application context of type "
@@ -82,8 +84,11 @@ private void launchBrowserInDevelopmentMode(ApplicationContext appContext) {
         DevModeHandlerManager devModeHandlerManager = lookup
                 .lookup(DevModeHandlerManager.class);
         if (devModeHandlerManager != null) {
-            devModeHandlerManager
-                    .launchBrowserInDevelopmentMode(getUrl(webAppContext));
+            String url = getUrl(webAppContext);
+            devModeHandlerManager.setApplicationUrl(url);
+            if (launch) {
+                devModeHandlerManager.launchBrowserInDevelopmentMode(url);
+            }
         }
     }
 

vaadin-spring/src/test/java/com/vaadin/flow/spring/DevModeHandlerStopTest.java

@@ -113,6 +113,10 @@ public DevModeHandler getDevModeHandler() {
         public void launchBrowserInDevelopmentMode(String url) {
 
         }
+
+        @Override
+        public void setApplicationUrl(String applicationUrl) {
+        }
     }
 
     @TestConfiguration