Re: (null) value only in DEV mode

Jens was talking about http://www.gwtproject.org/doc/latest/DevGuideCompilingAndDebugging.html#How_do_I_use_my_own_server_in_development_mode_instead_of_GWT's

Deploy your app to a local Tomcat and run DevMode without the embedded server (or use SuperDevMode)

On Friday, April 11, 2014 9:45:12 AM UTC+2, Zbyněk Kočí wrote:

I just fixed catch exception, but it doesnt help at all... No1 from every exception log isnt working in DEV mode. Even dev-mode-logs folder is useless since there is one empty log file.

No iam not using Jetty, I have no experience with that. So do you recommended to explicitly dissable using Jetty and configure it for my local Postgres DB server right. I would like to but dont know how and examples & guides from 2009-2011 are no longer working and cant help me.

Any working piece of example code for my case to kick me in the right direction?

Dne čtvrtek, 10. dubna 2014 15:06:29 UTC+2 Zbyněk Kočí napsal(a):

Hello,

Iam using RPC communication, JDBC driver (included in Tomcat libraries) & DB from previous project (Java & JSP only)

Debian, NetBeans 7.4, Apache Tomcat 6
On server side Iam connection into the DB, retreiving data, trying to catch them immediately and next print them out in alert message (with RPC example)

When I clean&build project, copy WAR file into the TomCat6 server it works fine in production mode and data are retreived properly, even System.out in Catalina logs works, but when Iam trying to do the same in DEV mode, it returns (null) as string text value instead. But no error message or log

I guess its some kind problem with accesing JDBC or diff address location while in DEV mode at address: http://127.0.0.1:8888/?gwt.codesvr=127.0.0.1:9997

Iam unable to find this issue while happen only in DEV mode.

Can anyone hint me whats wrong?

Contect.xml (tried only / as path, maybe issue here)

<Context antiJARLocking="true" path="/RPC">

  <Resource auth="Container" driverClassName="org.postgresql.Driver" maxActive="20" maxIdle="10" name="jdbc/postgres" password="pass" type="javax.sql.DataSource" url="jdbc:postgresql://127.0.0.1:5432/firstdb" username="user" validationQuery="select 1"/>

</Context>

Connection method (I found another one, but it doesnt seem working properly)

private Connection getConnection() throws NamingException, SQLException {

        Context ctx = null;

        try {

            ctx = new InitialContext();

        } catch (NamingException exp) {

        }

        DataSource ds = (DataSource) ctx.lookup("java:/comp/env/jdbc/postgres");

        return (ds.getConnection());

    }

Still in server Impl file as the only one JAVA server-side code

try {

            String query = "SELECT * FROM users WHERE id = ?";

            connection = getConnection();

            stmt = connection.prepareStatement(query);

            stmt.setInt(1, 1);

            rs = stmt.executeQuery();

            while (rs.next()) {

                id = rs.getInt("id");

                nam = rs.getString("nam");

                srn = rs.getString("srn");

                System.out.println(nam + " " + srn);

            }

and then after catch exceptions 

String messageString = "Hello " + nam + " " + srn + "!" +

                "message:" + input;

 

Feel free to ask me for more info/code

Thanks

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