dev@glassfish.java.net

Re: [arch] deployment issues

From: Marina Vatkina <Marina.Vatkina_at_Sun.COM>
Date: Thu, 15 Oct 2009 14:59:57 -0700

My $.02:

1. I'd expect redeploy to fail, or at least give a warning if it's the 1st deploy.

2. I'd be surprised to have 2 apps deployed if i said deploy --force and didn't
specify another name to use. More than that (unless something changed very
recently), v3 stopped printing the name with which it deployed the app.

Regards,
-marina

Bill Shannon wrote:
> A few of us have been discussing some issues with deployment recently and
> I'd like to let everyone know what we ended up with and get your feedback.
>
> We have three ways to deploy an application using the command line and
> two cases to consider for each operation.
>
> Here's what we came up with:
>
> | foo does not exist | foo exists
> ------------------------------------------------------------
> deploy foo.war | + | X
> deploy --force foo.war | + | + [2]
> redeploy foo.war | + [1] | +
>
>
> Possible outcomes:
>
> X - command fails
> + - command succeeds, app "foo" is deployed
>
> There were two changes we considered:
>
> 1. Should redeploying an app that isn't deployed be an error? Is it likely
> that you made a mistake if you try to redeploy something that isn't
> deployed to begin with? If you don't care whether or not it's already
> deployed why not use deploy --force?
>
> 2. Should deploy --force with an app that's already deployed cause the
> app to be deployed under a different name? The Java EE spec allows
> (but does not require) the deployment tool to choose a different name
> for the app if the name conflicts with an already deployed application.
> Does --force really mean "replace this app if it's already there", or
> does it mean "deploy this new app no matter what, without disturbing
> other apps that might be deployed"?
>
> Either of these changes would cause redeploy and deploy --force to behave
> differently. We were worried about the compatibility impact of such a
> change,
> both with v2 (for which deploy is already incompatible because --force is
> the default in v2), and with v3 where people have come to expect these two
> commands to behave the same.
>
> If anyone feels strongly that we should make either of these changes,
> let me know.
>
> Thanks.
>