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EJB: static references on a LocalHome

Posted on 2002-06-21
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Hi,

we are in need of some sort of utility class that resolves finder functionality for us. This should provide methods in the form of findXXXByPK(String) or findYYYByName(String), returning a local reference.
We have some different opinions on how to code this best, considering performance and "political correctness" of the code and code placement.

The first version would be a stateless session bean that instantiates all necessary home interfaces in the ejbCreate() method to use them later. Advantage: clean, nice code. Disadvantage: Every SessionBean using this SessionBean needs to make a new JNDI lookup to get this utility class.

Second version is a regular class (not an EJB) that can be accessed statically to provide these methods. This class would instantiate the relevant home interfaces in a static context and call find methods on these home interfaces from its static methods. Advantage: probably better performance than first version and easier access without JNDI lookup. Disadvantage: I am not sure if those static home interfaces are evil.

I know this might be an ethical question about code beauty, but I would like to hear some input on this.

thanks,
  exorcist.

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Question by:exorcist
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fi76631 earned 300 total points
ID: 7101160
Hmmm...

Best solution for what you propose is similar to option two above. You should use the singleton pattern.

Static home interfaces work just fine. I use this approach a lot and it makes my code run a lot faster.

Specifically, what I do is have a client wrapper for each EJB. This abstracts the fact from the caller of the bean that they are interacting with a bean. The client is a singleton that loads the specific home interfaces on creation.

Calls to the bean are very simple:

Result = myBeanClient.sInstance().beanMethod(...);

Obviously, the beanClient is derived from a baseBeanClient class that does all of the work. Each bean client has only a hand full of lines of code...so each client can be written in about 10 seconds!

Its quick, simple, controllable and it works!
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by:exorcist
ID: 7121473
90% of the answer is actually off topic, but since it's the only answer....
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