Can I define some "constants" in the components.xml?

[anescu]

Hello,

So, I would like to set some parameters that will be used to configure a module, like an email server, jms context, etc.

The class that does the actual processing is not a Seam component, and further more, is being called from multiple Seam components. I know I could define the parameters for each Seam component, but I want to know if is a way I can define them globally (can this be done with "factory"?), and most important how do I retrieve the values inside a Seam component?

Does this work?

<factory name="providerUrl" value="localhost:1099"/>

And is yes, how do you retrieve the value in a Seam component?
Does this code work?

@In
private String providerUrl

[matt.drees]

You probably want

<factory name="providerUrl" value="localhost:1099" scope="stateless" auto-create="true"/>

The auto-create means you can use @In instead of @In(create=true).
You can specify a different scope if you want.

[anescu]

I want something like "application scope". Just a damn constant, the same value for everyone.

I read the reference for Seam, I saw the factory examples, but I did not find yet any example on how to actually read the values in code. Probably there are, somewhere :).

I'll see if I can get my code to work...

[fernando_jmt]

I have somethig like this:

 <component name="sysConfig" auto-create="true" class="com.myapp.SystemConfig" scope="APPLICATION">
 <property name="rowsPerPage">5</property>
 <property name="fileUrl">whateverpath</property>
 </component>

@In
SystemConfig sysConfig;

[matt.drees]

"anescu" wrote:
I want something like "application scope". Just a damn constant, the same value for everyone.

Stateless will do that, too. Stateless means that it doesn't get stored in a scope, so any time something asks for that variable (injection, el, whatever), it will re-evaluate the value expression in the < factory >. Which in your case is a constant.

And yeah, just use @In. It's all the same kind of stuff. You can inject any kind of contextual variable.

[stu2]

Btw take a look at the wiki example. There's a pretty nice example of doing exactly this.

[anescu]

Thanks guys,

I made it work. For now just some String values, but I will probably transform them into a "config" class.