EasyWMS Open Source WebGIS Projects

After i got some problem by debugging with GWT 2.0, I downgraded from 2 to 1.7, but I got this error when running "Web Application":
[WARN] Unknown module requested 'missingplugin'; all active GWT modules must be specified in the command line arguments

I did this, and solve the problem:
1. Internet Explorer | Tools | Internet Options | Delete Cookies
2. Internet Explorer | Tools | Internet Options | Delete Files
3. Internet Explorer | Tools | Internet Options | Clear History

In GWT debug browser windows will ask you about the Gear if you are using Google Gear.

Ref:

Strange problem, just one part of simple code, works on my XP system, but not on Windows2003.

Connection connection=null;
try{
connection = DriverManager.getConnection ("jdbc:odbc:thin@192.168.2.107:1521:Schemaname", "username", "password"); 
PreparedStatement pstmt = con.prepareStatement ("Select * from sometable");
ResultSet rset = pstmt.executeQuery();
....................

Very simple SQL code for one servlet, but when i run it in Tomcat, i got this exception:

java.sql.SQLException: No suitable driver found for 

I have written one J2EE web service which was run in Tomcat, this service will call Ant to build one J2ME Polish project. It can be run without problem, aber will got such exception "ProGuard is unable to obfuscate: java.io.IOException: Cannot run
program "java": java.io.IOException: error=12, Cannot allocate memory" after several times' building. This is abvious OutofMemory exception.

Tomcat service was run on CentOS linux, the first thing what i thought is to increase the initial memory of Tomcat.

1. Tomcat Configuation

Creating HTTPS Connection

Firstly should create a temporarely SSL certificate to use the
Tomcat in an SSL mode.

Environment: hibernate 2 and Oracle 9i:
This post will record the strange exceptions I have met.

Exception 1:

java.sql.SQLException: ORA-02289: sequence does not exist

If you are one lazy programmer like me and have no time to read the document of log4j but still want to use log4j, try to read the following.

At least you'd better know that log4j is one tools to help you debug and log what happened with your code, anywhere and anywhen. I was used to use System.out.println() to debug my code, and I have written one function to do that:

2 Create Web Service

2.1 Create Web Service Project

Enter the %AXIS2_HOME%/samples (Here is D:\ProgramFiles\axis2\samples) , there are many Web Service good example here. If you are not clear about how to create one Web Service from nothing, just like me, those examples are good turorials. Now I will use one and modify it to be our first Web Service.

In this post I will build one Web Service with Axis2, and write one J2ME application as one Web Service client. We will know how Web Service works with mobile client.

This week I reinstalled my system, and I found one J2EE Servlet project can not be run after I reinstalled all of the programming softwares and eclipse, this project does connect MySQL database(This project had no problem before). I got this Exception: javax.servlet.ServletException: Unknown initial character set index
'48' received from server. Initial client character set can be forced
via the 'characterEncoding' property.

 Strange, I went to ask my Google friend and I found those information: