Another possibility for handing the multiple variants of JREs is to have a
JRE (or java execution environment) group with selectable content so that
the actual variant and version can be chosen via filters. You can think of
this approach as corresponding to the way that arch, os, and ws are
currently handled by eclipse. A bunch of details on exactly how to
represent the myriad JREs and their relationships would have to be worked
out. Similarly we would have to craft very carefully the leaf IUs for
jres to meet the use cases we imagine.
If we did this, then our eclipse generator could use the execution
environment information from the manifest to construct required
capabilities on the appropriate jre - currently we ignore the execution
environment and don't generate dependencies.
- Dave
James D Miles/Austin/[EMAIL PROTECTED]
Sent by: [EMAIL PROTECTED]
10/11/2007 09:30 AM
Please respond to
Equinox development mailing list <[email protected]>
To
[email protected]
cc
Subject
[equinox-dev][prov]
>From Questions for M3
"Should versions be pluggable (the current version does not properly
reason about the version of the JRE"
JRE versions do go past the version definition that currently exists. I
will only give you our experience using versions with the current update.
Translate to the new terminology as needed.
We used the major number to create a hierarchy of different types of JREs.
For instance we used 2.0.0 for j2se and 1.0.0 for jclDesktop. These were
used for a parent feature. The child feature contained the actual JVM
feature. This allowed us to provision JVMs like any other artifact. It
allowed us to treat JVMs as equivalent from the ID perspective.
However it does not properly encapsulate the policy decisions that are
necessary. If a platform initially specifies jcldesktop, version 1.0.0,
then the user changes the JRE to J2SE, version 2.0.0, what gets done on an
upgrade that specifies jclDesktop. So there likely needs to be another
parameter/policy that specifies a user or platform choice (assuming either
choice will resolve). In general updates only occur on versions. However
IU with ID for jclDesktop does not equate to an ID for J2SE. The problem
is how to know that they can replace each other.
_______________________________________________
equinox-dev mailing list
[email protected]
https://dev.eclipse.org/mailman/listinfo/equinox-dev
_______________________________________________
equinox-dev mailing list
[email protected]
https://dev.eclipse.org/mailman/listinfo/equinox-dev
