Made webhook bots print exceptions stacktrace to stderr instead of silently swallowing them.

telegrambots/src/main/java/org/telegram/telegrambots/updatesreceivers/DefaultExceptionMapper.java

@@ -0,0 +1,20 @@
+package org.telegram.telegrambots.updatesreceivers;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.ext.ExceptionMapper;
+
+/**
+ * Prints exceptions in webhook bots to stderr
+ *
+ * @author Mouamle
+ * @version 1.0
+ */
+public class DefaultExceptionMapper implements ExceptionMapper<Throwable> {
+
+    @Override
+    public Response toResponse(Throwable exception) {
+        exception.printStackTrace();
+        return Response.serverError().build();
+    }
+
+}

telegrambots/src/main/java/org/telegram/telegrambots/updatesreceivers/DefaultWebhook.java

@@ -52,6 +52,7 @@ public class DefaultWebhook implements Webhook {
         ResourceConfig rc = new ResourceConfig();
         rc.register(restApi);
         rc.register(JacksonFeature.class);
+        rc.register(DefaultExceptionMapper.class);
 
         final HttpServer grizzlyServer;
         if (keystoreServerFile != null && keystoreServerPwd != null) {