better default for publicUriBase, add BrowserLauncherListener

wizard-server/src/main/java/org/cobbzilla/wizard/server/config/RestServerConfiguration.java

@@ -31,6 +31,7 @@ import java.util.concurrent.TimeUnit;
 
 import static org.cobbzilla.util.daemon.ZillaRuntime.die;
 import static org.cobbzilla.util.daemon.ZillaRuntime.empty;
+import static org.cobbzilla.util.network.NetworkUtil.getLocalhostIpv4;
 import static org.cobbzilla.util.reflect.ReflectionUtil.forName;
 import static org.cobbzilla.util.reflect.ReflectionUtil.instantiate;
 
@@ -53,7 +54,10 @@ public class RestServerConfiguration {
     @Getter @Setter private String serverName;
 
     @Setter private String publicUriBase;
-    public String getPublicUriBase () { return !empty(publicUriBase) && publicUriBase.endsWith("/") ? publicUriBase.substring(0, publicUriBase.length()-1) : publicUriBase; }
+    public String getPublicUriBase () {
+        if (empty(publicUriBase)) return "http://"+getLocalhostIpv4()+":"+getHttp().getPort();
+        return !empty(publicUriBase) && publicUriBase.endsWith("/") ? publicUriBase.substring(0, publicUriBase.length()-1) : publicUriBase;
+    }
 
     @Getter @Setter private String springContextPath = "classpath:/spring.xml";
     @Getter @Setter private String springShardContextPath = "classpath:/spring-shard.xml";

wizard-server/src/main/java/org/cobbzilla/wizard/server/listener/BrowserLauncherListener.java

@@ -0,0 +1,42 @@
+package org.cobbzilla.wizard.server.listener;
+
+import lombok.extern.slf4j.Slf4j;
+import org.cobbzilla.util.http.URIUtil;
+import org.cobbzilla.wizard.server.RestServer;
+import org.cobbzilla.wizard.server.RestServerLifecycleListenerBase;
+import org.cobbzilla.wizard.server.config.RestServerConfiguration;
+
+import java.awt.*;
+
+import static java.awt.Desktop.isDesktopSupported;
+import static org.cobbzilla.util.daemon.ZillaRuntime.die;
+
+@Slf4j
+public class BrowserLauncherListener extends RestServerLifecycleListenerBase {
+
+    @Override public void onStart(RestServer server) {
+        final RestServerConfiguration config = server.getConfiguration();
+        final String baseUri = config.getPublicUriBase();
+        final Thread appThread = new Thread(new Runnable() {
+            @Override public void run() {
+                final Desktop desktop = isDesktopSupported() ? Desktop.getDesktop() : null;
+                if (desktop != null && desktop.isSupported(Desktop.Action.BROWSE)) {
+                    try {
+                        desktop.browse(URIUtil.toUri(baseUri));
+                    } catch (Exception e) {
+                        final String msg = "onStart: error launching default browser with url '" + baseUri + "':  " + e;
+                        log.error(msg, e);
+                        die(msg, e);
+                    }
+                } else {
+                    // no browser. tell the user where the server is listening via log statement
+                    log.info("\n\n"+server.getConfiguration().getServerName()+" Successfully Started\n\nNot launching browser: System lacks a browser and/or desktop window manager.\n\nWeb UI is: "+baseUri+"\nAPI is: "+baseUri+"/api\nHit Control-C to stop the server\n");
+                }
+            }
+        });
+        appThread.setDaemon(true);
+        appThread.start();
+
+        super.onStart(server);
+    }
+}