Struts 2 under IntelliJ IDEA 8.0M1

Gustavo Felisberto — Fri, 03 Oct 2008 13:42:56 +0000

If you like IDEA and use Struts 2 you can be happy to know that 8.0 release comes with a new Struts 2 plugin. There is a small tutorial on how to use it but it has some errors.
First the Action class should extend ActionSupport hand have proper setter methods:

package hello;
import com.opensymphony.xwork2.ActionSupport;
public class HelloWorld extends ActionSupport {
    private String username;
    private String message;
    public String getMessage(){
        return message;
    }
    public String execute(){
        message = "Hello, " + username + ".";
        return SUCCESS;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
}

Second the JSP file can have a proper action:

< %@ page contentType="text/html;charset=UTF-8" language="java" %>
< %@ taglib prefix="s" uri="/struts-tags" %>
>
  >>Simple jsp page>>
  >
		Struts 2 Message:  :property value="message" default="Guest." />
		 :form method="GET" action="HelloWorld">
			Enter your name: :textfield name="username" />
			 :submit value="Submit" />
		>
  >
>

And finally struts.xml can have the Action declared without the ugly unRESTFUL .action:

< ?xml version="1.0" encoding="UTF-8"?>
 
< !DOCTYPE struts PUBLIC
  "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
  "http://struts.apache.org/dtds/struts-2.0.dtd">
 
>
     name="/" extends="struts-default">
		 name="HelloWorld" class="hello.HelloWorld">
			 name="success">/index.jsp>
		>
	>
>

I really like IDEA when it comes to Java codding, and I can live with the quirks of the Struts 2 support. But one thing that makes me steam is the fact that I have to un-deploy and deploy the application for each change I make. That steals me hours every week.

Assertion `c->xlib.lock’ failed

Gustavo Felisberto — Tue, 29 Jan 2008 23:39:49 +0000

With XCB and java graphical applications on recent distributions one gets:

java: xcb_xlib.c:82: xcb_xlib_unlock: Assertion `c->xlib.lock’ failed.

This is very well documented (just google a bit). So this serves mostly as a mental note for the way to fix it.

$ sed -i ‘s/XINERAMA/FAKEEXTN/g’ /opt/sun-jdk-1.6.0.04/jre/lib/i386/xawt/libmawt.so

or the libawt.so of your JRE. Remember that many programs may come with they’re own JRE and not use the one provided by the system.

O Blog do Gustavo Felisberto » java

Struts 2 under IntelliJ IDEA 8.0M1

Assertion `c->xlib.lock’ failed