[jboss-as7-dev] [Detyped API Description] Example of multiple values for "allowed"?

[Thomas Diesler]

Yes, there are many config values that would require a restart of 
respective subsystems or services. This in turn would cause an yet 
undefined ripple to all the dependees.

Also, it is possible that a subsystem cannot decide alone whether a 
write operation at runtime that would bounce a certain service is 
permissible. For example: Service A has property foo. Changing foo, 
requires A to restart. B depends on A. B cannot be restarted. Changing 
foo would hence require a server restart, which cannot be decided by 
looking at service A alone.

I would suggest to be very selective of what can be changed at runtime 
and only allow write access through the management API to properties 
that are known to be safe. Changes that require server restart can be 
collected and marked as such.

-thomas

On 09/21/2011 05:43 PM, Brian Stansberry wrote:
> It's part of what I'm doing.
>
> I believe changes to these pool configs can't be applied directly to the
> runtime though, at least not without a header associated with the
> request indicating its ok to bounce the PoolConfigService. I presume
> bouncing that service will in turn bounce any EJB services that use that
> config. (If not, let me know, as it probably means we could just bounce
> it by default.)
>
> The StrictMaxPoolConfig stored in the PoolConfigService could be made
> mutable, in which case any EJB deployments deployed in the future would
> get the new config values, but any existing pools would remain as is.
> That seems like an unintuitive semantic for this particular use case though.
>
> On 9/21/11 9:01 AM, Jaikiran Pai wrote:
>> That looks like a separate issue. The bean instance pool attributes have
>> currently been modelled as read-only. More of an oversight rather than
>> intentional.
>>
>> I think Brian is already working on
>> https://issues.jboss.org/browse/AS7-913 so this could be included as
>> part of that work. Else I'll take this up separately.
>>
>>
>> -Jaikiran
>> On Wednesday 21 September 2011 06:59 PM, Andrig Miller wrote:
>>> Why is it read-only?  Seems like you should be able to set to a
>>> different value too.  Another bug?
>>>
>>> Andy
>>>
>>> ------------------------------------------------------------------------
>>>
>>>       *From: *"Jaikiran Pai"<jpai at redhat.com>
>>>       *To: *jboss-as7-dev at lists.jboss.org
>>>       *Sent: *Wednesday, September 21, 2011 4:39:34 AM
>>>       *Subject: *Re: [jboss-as7-dev] [Detyped API Description] Example
>>>       of multiple values for "allowed"?
>>>
>>>       It's a bug. It should actually look like:
>>>
>>>       "timeout-unit" =>   {
>>>                            "description" =>   "The instance acquisition
>>>       timeout
>>>       unit",
>>>                            "type" =>   STRING,
>>>                            "required" =>   false,
>>>                            "default" =>   "MINUTES",
>>>                            "allowed" =>   [
>>>                                "HOURS",
>>>                                "MINUTES",
>>>                                "SECONDS",
>>>                                "MILLISECONDS"
>>>                            ],
>>>                            "access-type" =>   "read-only",
>>>                            "storage" =>   "configuration"
>>>                        }
>>>
>>>
>>>       I'll send a pull request with the fix.
>>>
>>>       -Jaikiran
>>>       On Wednesday 21 September 2011 04:02 PM, Jaikiran Pai wrote:
>>>       >   The model for EJB3 does allow more than one timeout unit type
>>>       (SECONDS,
>>>       >   MINUTES and MILLISECONDS etc...). So that output doesn't look
>>>       right. Let
>>>       >   me take a look why.
>>>       >
>>>       >   -Jaikiran
>>>       >   On Wednesday 21 September 2011 03:53 PM, David Bosschaert wrote:
>>>       >>   Hi all,
>>>       >>
>>>       >>   I'm looking at the EJB3 pools timeout-unit description, which
>>>       is the
>>>       >>   following:
>>>       >>   "timeout-unit" =>     {
>>>       >>        "description" =>     "The instance acquisition timeout unit",
>>>       >>        "type" =>     STRING,
>>>       >>        "required" =>     false,
>>>       >>        "default" =>     "MINUTES",
>>>       >>        "allowed" =>     "MILLISECONDS",
>>>       >>        "access-type" =>     "read-only",
>>>       >>        "storage" =>     "configuration"
>>>       >>   }
>>>       >>
>>>       >>   Is there an example of an attribute somewhere where 'allowed'
>>>       has more
>>>       >>   than 1 value? I'd like to test a console gui piece against it.
>>>       >>
>>>       >>   Thanks,
>>>       >>
>>>       >>   David
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>>>       >
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Thomas Diesler
JBoss OSGi Lead
JBoss, a division of Red Hat
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