Package e4s

This is the E4S ("ELEMENT4SOLUTION framework") main package.

See:
Description

Class Summary

E4HttpServlet	Main class defined as servlet, when running as servlet (e.g.
E4ModuleDeclarations	Class declaration for the classes that will contain E4Method functionality.

Package e4s Description

This is the E4S ("ELEMENT4SOLUTION framework") main package.

Understanding the main structure of this implementation:

This e4s implementation is intended to build Java based web applications, based on Apache/Tomcat server.
The main intention is to give a tool to the developer which enables to build up fast, reliable applications. In our meaning, an application is somewhat more rather than a webpage with some functionality.

You first should become familiary with some basic concepts:

• e4s.html which is the package that covers the HTML elements used for output
• e4s.servlet which gives the basic framework for building up own applications
• e4s a base class as starting point for your application.

You write your code as one or more Java classes, inheritated by e4s.servlet.moduleImplementation. Each of your modules contains more or less functions, and each function has a unique name. All you must do is include a member variable in your module with the same name as your function has, and this member must be of class e4s.html.MethodReflection. To call or integrate one of your functions, you make use of this member variable.

Your module must be inheritated from e4s.servlet.moduleImplementation like:

  public class myClass extends moduleImplementation

containing the declaration of the member variable for your function, initialized with null:

  public MethodReflection myFunction = null;

Your function has always the format:

  public void myFunction(HTML html, CgiParameters params)
  {
  }

and within this function you can use all methods for output starting with methods in e4s.HTML (see an example there).

Finally, you need to register your class using the e4s.servlet.callbackClasses to make it known to the runtime system.

Your function now is associated with an internal (or external) alias key and can be called from other functions or you can query performance and load statistics for it. At this point, it is for sure, that the compiled program will match and include all references for your application.

To have a starting entry point for your whole application, you need to derive one class form e4s.e4s. A lot of implementation examples can be found in the e4s.tutorial package which is also shipped including the source code.

Support and Contact information:

office@door2solution.at

(C)door2solution software gmbh

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