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From Denis Mekhanikov <dmekhani...@gmail.com>
Subject Re: UriDeploymentSpi and GAR files
Date Wed, 20 Feb 2019 08:49:02 GMT
Denis,

This XML may contain task descriptors, but I couldn't find any
documentation on this format.
Also it may contain a userVersion [1] parameter, which can be used to force
tasks redeployment in some cases.

This information can be provided in simple JAR files with the same file
structure.
There is no need to confuse people and require their packages to have a GAR
extension.

Also if you don't specify the task descriptors, then all tasks in the file
will be registered.
So, I doubt, that anybody will bother specifying the descriptors. XML is
not very user-friendly.
This piece of configuration doesn't seem necessary to me.

[1]
https://apacheignite.readme.io/docs/deployment-modes#section-un-deployment-and-user-versions

Denis

ср, 20 февр. 2019 г. в 01:35, Denis Magda <dmagda@apache.org>:

> Denis,
>
> What was the purpose of having XML and other files within the GARs? Guess
> it was somehow versioning related - you might have several tasks of the
> same class but different versions running in a cluster.
>
> -
> Denis
>
>
> On Tue, Feb 19, 2019 at 8:40 AM Ilya Kasnacheev <ilya.kasnacheev@gmail.com
> >
> wrote:
>
> > Hello!
> >
> > Yes, I think we should accept plain JARs if anybody needs this at all.
> > Might still keep meta info support for compatibility.
> >
> > Regards,
> > --
> > Ilya Kasnacheev
> >
> >
> > вт, 19 февр. 2019 г. в 19:38, Denis Mekhanikov <dmekhanikov@gmail.com>:
> >
> > > Hi!
> > >
> > > There is a feature in Ignite called DeploymentSpi [1], that allows
> adding
> > > and changing implementation of compute tasks without nodes' downtime.
> > > The only usable implementation right now is UriDeploymentSpi [2], which
> > > lets you provide classes of compute tasks packaged as an archive of a
> > > special form. And this special form is the worst part.
> > > GAR file is just like a JAR, but with some additional meta info. It may
> > > contain an XML with description of tasks, a checksum and also
> > dependencies.
> > >
> > > We barely have any tools to build these files, and they can be replaced
> > > with simple uber-JARs.
> > > The only tool we have right now is IgniteDeploymentGarAntTask, which is
> > not
> > > documented anywhere, and it's supposed to be used from a long-forgotten
> > > Apache Ant build system.
> > >
> > > I don't think we need this file format. How about we deprecate and
> remove
> > > it and make UriDeploymentSpi support plain JARs?
> > >
> > > [1] https://apacheignite.readme.io/docs/deployment-spi
> > > [2]
> > >
> > >
> >
> https://ignite.apache.org/releases/latest/javadoc/org/apache/ignite/spi/deployment/uri/UriDeploymentSpi.html
> > >
> > > Denis
> > >
> >
>

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