On Tuesday, November 4, 2003, at 09:53 AM, Aaron Mulder wrote:
On Tue, 4 Nov 2003, Dain Sundstrom wrote:That is what I thought. We can easily find all deployments with an
ObjectName pattern query.
...
That won't work. Dependencies are static and so are notification
listeners, so when every you changed states you would have to
reestablish all dependencies and any listener would have to reregister.
Well, most of the JSR-88 methods want to get a list of modules in
a particular state (running, stopped, etc.). Do you think it's worth
using an ObjectName query and then individually querying every module for
its state as opposed to trying to maintain a indexed list of every module
with its state and type?
It depends on how often it happens. My guess is the deployment stuff will not be heavily used (non-critical path) so it doesn't matter if it is a bit inefficient. The safest and simplest method is the query and poll approach, but if it proves to be too slow, we can keep an indexed list by watching for registration and state change events. I prefer these solutions to avoid having to be plumbed into every deployment planner and to avoid missing deployments that did not use a planner.
-dain
