added grizzly debug error page

VerteilteSysteme-Examples/src/verteiltesysteme/aws/TCPTimeCounterRESTServer.java

@@ -1,26 +1,46 @@
 /* Beispiel angelehnt an http://www.torsten-horn.de/techdocs/jee-rest.htm */
 package verteiltesysteme.aws;
 
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
+import java.io.PrintStream;
 import java.net.URI;
+
+import org.glassfish.grizzly.http.server.ErrorPageGenerator;
 import org.glassfish.grizzly.http.server.HttpServer;
+import org.glassfish.grizzly.http.server.Request;
 import org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpServerFactory;
 import org.glassfish.jersey.server.ResourceConfig;
 
-public class TCPTimeCounterRESTServer
-{
-   public static void main( String[] args ) throws IOException, InterruptedException 
-   {
+public class TCPTimeCounterRESTServer {
+	public static void main(String[] args) throws IOException, InterruptedException {
 		String baseUrl = (args.length > 0) ? args[0] : "http://0.0.0.0:36042";
 
-      final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(
-            URI.create( baseUrl ), new ResourceConfig( TCPTimeCounterRESTService.class ), false );
+		final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(URI.create(baseUrl),
+				new ResourceConfig(TCPTimeCounterRESTService.class), false);
 		Runtime.getRuntime().addShutdownHook(new Thread(new Runnable() {
 			@Override
 			public void run() {
 				server.shutdownNow();
 			}
 		}));
+
+		ErrorPageGenerator epg = new ErrorPageGenerator() {
+			@Override
+			public String generate(Request request, int status, String reasonPhrase, String description,
+					Throwable exception) {
+				StringBuilder sb = new StringBuilder();
+				ByteArrayOutputStream baos = new ByteArrayOutputStream();
+				PrintStream ps = new PrintStream(baos);
+				exception.printStackTrace(ps);
+				ps.close();
+				sb.append(new String(baos.toByteArray()));
+				System.out.println(sb.toString());
+				return sb.toString();
+			}
+		};
+		server.getServerConfiguration().setDefaultErrorPageGenerator(epg);
+
 		server.start();
 
 		System.out.println("Grizzly-HTTP-Server gestartet");