Slim3 is a Java framework for developing applications on Google App Engine. It is optimized for GAE and allows building applications using an MVC framework. Slim3 provides features like fast deployment, hot reloading, and type-safe queries. To set up a Slim3 project, install Java and Eclipse plugins, create a new Slim3 project, module, and entry point class, and uncomment configuration in web.xml to enable the GWT service servlet. The project can then be run as a web application.

1. {{
Slim3 for GAESlim3 for GAE
Java framework for Google application engine.Java framework for Google application engine.
Author by caoguangyaoAuthor by caoguangyao

2.  Optimized for Google App engine/JavaOptimized for Google App engine/Java
 Can use as just a datastore frameworkCan use as just a datastore framework
 Main concept :Simple,Less Is MoreMain concept :Simple,Less Is More
 Open sourceOpen source
 Main feature:fast spin-up,hot reloading,typeMain feature:fast spin-up,hot reloading,type
safe querysafe query
Slim3=> MVC framework.Slim3=> MVC framework.

3.  Install javaInstall java
 Install eclipseInstall eclipse
 Plugins for Eclipse:Plugins for Eclipse:
http://dl.google.com/eclipse/plugin/3.7http://dl.google.com/eclipse/plugin/3.7
http://slim3.googlecode.com/svn/updates/http://slim3.googlecode.com/svn/updates/
EnvirementsEnvirements

4. configurationconfiguration

5. ConfigurationConfiguration

6. ConfigurationConfiguration

7.  File-New-Project-Slim3-Slim3 ProjectFile-New-Project-Slim3-Slim3 Project
 Give the project name & root package nameGive the project name & root package name
Create a blank projectCreate a blank project

8.  Uncomment out GWTServiceServlet and theUncomment out GWTServiceServlet and the
servlet-mapping in war/WEB-INF/web.xmlservlet-mapping in war/WEB-INF/web.xml
<servlet><servlet>
<servlet-name>GWTServiceServlet</servlet-name><servlet-name>GWTServiceServlet</servlet-name>
<servlet-class>org.slim3.gwt.server.rpc.GWTServiceServlet</servlet-class><servlet-class>org.slim3.gwt.server.rpc.GWTServiceServlet</servlet-class>
<load-on-startup>1</load-on-startup><load-on-startup>1</load-on-startup>
</servlet></servlet>
<servlet-mapping><servlet-mapping>
<servlet-name>GWTServiceServlet</servlet-name><servlet-name>GWTServiceServlet</servlet-name>
<url-pattern>*.s3gwt</url-pattern><url-pattern>*.s3gwt</url-pattern>
</servlet-mapping></servlet-mapping>
Edit project configureEdit project configure

9.  File-New-ModuleFile-New-Module
 Input “tutorial” in the “Package” text fieldInput “tutorial” in the “Package” text field
 Input “Main” in the “Module name” text fieldInput “Main” in the “Module name” text field
 Click “finish”Click “finish”
 ““src/tutorial/Main.gwt.xml” will be createdsrc/tutorial/Main.gwt.xml” will be created
 Change it toChange it to
<?xml version="1.0" encoding="UTF-8"?><?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.5.1//EN"<!DOCTYPE module PUBLIC "-//Google Inc.//DTD Google Web Toolkit 2.5.1//EN"
"http://google-web-toolkit.googlecode.com/svn/tags/2.5.1/distro-source/core/src/gwt-"http://google-web-toolkit.googlecode.com/svn/tags/2.5.1/distro-source/core/src/gwt-
module.dtd">module.dtd">
<module<module rename-to='main'rename-to='main'>>
<inherits name="com.google.gwt.user.User" /><inherits name="com.google.gwt.user.User" />
<inherits name='org.slim3.gwt.emul.S3Emulation' /><inherits name='org.slim3.gwt.emul.S3Emulation' />
<source path="client"/><source path="client"/>
<source path="shared" /><source path="shared" />
</module></module>
Create moduleCreate module

10.  File-New-Entry Point ClassFile-New-Entry Point Class
 Input “tutorial.client” in the “Package” textInput “tutorial.client” in the “Package” text
fieldfield
 Input “MainEntryPoint” in the “Name” textInput “MainEntryPoint” in the “Name” text
fieldfield
 ““src/tutorial.client/MainentryPoint.java” willsrc/tutorial.client/MainentryPoint.java” will
be createbe create
 File – New – Html PageFile – New – Html Page
 Input “index.html” in the “file name” text fieldInput “index.html” in the “file name” text field
Create Entry Point ClassCreate Entry Point Class

11.  Run as > Web Application.Run as > Web Application.
Running the ProjectRunning the Project