Re: Non component class as the starting point

Mon, 19 Jan 2004 12:22:29 -0800

Thanks for your reply

How does a container know which component is the starting point of any application. Does the root component in the block.xml specify that ?

And how can we have container call a method on that component which doesn't implement any Framework interfaces.

For Examples in HelloComponent If I put a "System.out.println("Hello World ")" in the initialize() method I would get an "hello world" out put. Cause the container would run the initialize method following the sequence specified by the Framework.

But say I want to define a method in HelloComponent:

public String printHelloWorld(){

return "Hello World";

}


And now I want to use this component method from a class ( say Test )that doesn't implement any Framework interfaces. And I want to make this Test class the starting point of my application.

When I say starting point, I mean, like a gui application can start from a main program. So that main program would be the starting point of an application.

In my container, some component gotta be the starting point of my application, right ?

Or am on a wrong line of thinking.

Thanks

Mathews




From: Stephen McConnell <[EMAIL PROTECTED]>
Reply-To: "Avalon framework users" <[EMAIL PROTECTED]>
To: Avalon framework users <[EMAIL PROTECTED]>
Subject: Re: Non component class as the starting point
Date: Mon, 19 Jan 2004 19:51:11 +0100


Julien:

Any class can be a component - all that you need to to add a xinfo file. You can create this manually or use javadoc tags to automate the process. A simple xinfo for the root object you describing could look like:

<type>
  <info>
    <name>whatever</name>
    <lifestyle>singleton</lifestyle>
  </info>
  <dependencies>
      <dependency key="hello" type="tutorial.Hello" version="1.1"/>
  </dependencies>
</type>

The only constraint is that the object has a null constructor (and chances are that even this will be eliminated in the near future).

Cheers, Steve.

Mathews Julien wrote:

Hi Guys,

I want to know if the starting point of an application can be a non component class.

For example say I want to use the HelloComponent with a class that is not a component. Normally we define the dependencies for a component using the avalon meta tags.

Can we define a component as a dependency for a non component class and modify the xml property files, so that the non component class is started by the container as the starting point.

Thanks

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