Hi, Marco:
Since you first brought up using Spring to configure the chain, that has been on the back of my mind. Probably like you, as I use Spring more in an application I find it frustrating to bump up against places where I can't seem to connect to the ApplicationContext or otherwise use Spring's DI services.
I haven't needed what you describe yet, but I've been thinking about it. I've made a few changes both to commons-chain and Struts and I think the path is now clear, although you'll still have to write some code.
Last week I committed changes to commons-chain LookupCommand and the base Struts RequestProcessor which expose the CatalogFactory as a settable property. This gets around the fundamental problem of having them always go to the static CatalogFactory instance managed by the CatalogFactory class. Now you can have both of them use a CF created by Spring.
So really, all you should need to do is write a custom subclass of ComposableRequestProcessor which gets its base CatalogFactory from Spring during the init method. Then, you'd have to adapt the default chain-config.xml into Spring's bean-factory XML syntax so as to create a CatalogFactory and register the "struts" catalog all in Spring.
Until/unless Struts actually has a dependency upon Spring, I'm not sure that we can do much more in the core library itself. But I think you can get there if you want to.
Joe
At 10:48 AM +0100 5/4/05, Marco Mistroni wrote:
Hello all, I am currently using Struts 1.3dev in my application, and I have recently bothered the list to find a way to configure commands via Spring. Now, just yesterday, I came across an article (http://www.onjava.com/pub/a/onjava/2005/03/02/commonchains2.html) on how The new RequestProcessor is used in Struts 1.3... Struts 1.3 uses a chain-config.xml and custom chan configs that allows user To 'override' or change the behaviour of request processor.
Following that article I have implemented my custom command for pre-processing in RequestProcessor (as showed in article).
Question is: what if I want to use some of my spring beans in one of those 'request processor' commands?
Currently, in my app, I am using commands for doing various logic, and those Commands are configured via Spring by using a Spring plugin..
But I am not sure I can do same with RequestProcessor commands, since the chain-config.xml file is read at initialization time, when I suppose the Spring plugin has not been initialized yet... so the bean won't be available..
If I remember correct, there's a way in Spring to say that a 'bean' will be initialized only after 'beanx' has been initialized (I guess is a 'depend' attribute ein applicationContext.xml)..
But will this work for RequestProcessor commands?
Hope I was clear enough to explain my problem...
Thanx in advance and regars marco
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