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Subject: Re: Dynamically reloading the model on change
From: Andrus Adamchik <andrus@objectstyle.org>
In-Reply-To: <5954B38C-D8AD-407F-8F62-24B8A661FE6B@karlmenn.is>
Date: Mon, 30 May 2016 15:48:52 +0300
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Message-Id: <01F17D00-DBCD-4A77-9534-A6090B7AE938@objectstyle.org>
References: <39634F75-DDA4-4F2B-9A8C-96141C7AA011@karlmenn.is> <02613541-E9F6-4AFE-9E67-754A548D84BE@objectstyle.org> <5954B38C-D8AD-407F-8F62-24B8A661FE6B@karlmenn.is>
To: user@cayenne.apache.org
archived-at: Mon, 30 May 2016 12:49:06 -0000

In a typical app ServerRuntime is a singleton controlled by your code. =
You are probably creating it explicitly in your app somewhere on =
startup. Or are you relying on CayenneFilter to bootstrap Cayenne? (in =
which case runtime is accessible via WebUtil.getCayenneRuntime(..)).

Andrus

> On May 30, 2016, at 3:44 PM, Hugi Thordarson <hugi@karlmenn.is> wrote:
>=20
> I currently use JRebel for class reloading when developing WO. It has =
a relatively simple plugin API that can be used to watch changes to =
Cayenne project files and trigger stuff on file/class modification. It =
could replace the ServerRuntime instance, but it would need some way to =
know what ServerRuntime instances to replace with a new instance. This =
could be specified in a configuration file=E2=80=94or is there some way =
for me to retrieve all ServerRuntime instances related to the modified =
entities?
>=20
> - hugi
>=20
>=20
>=20
>> On 30. ma=C3=AD 2016, at 12:31, Andrus Adamchik =
<andrus@objectstyle.org> wrote:
>>=20
>> Doable in theory - just create a new runtime every time you detect a =
change. The bigger question is how practical this is, considering you =
also need to reload Java classes. I guess also doable if you run in =
debug mode that does class reloading.
>>=20
>> Andrus
>>=20
>>> On May 30, 2016, at 3:27 PM, Hugi Thordarson <hugi@karlmenn.is> =
wrote:
>>>=20
>>> Hi all,
>>> I=E2=80=99ve been working with Ebean for the past couple of months =
(customer unfortunately mandated the use of Ebean). I don=E2=80=99t =
really like working with it, but it has one feature that I really =
like=E2=80=94I can change model classes at will (add attributes, =
relationships etc.) and the changes take effect immediately, i.e. I =
don=E2=80=99t need to restart the application.
>>>=20
>>> Is it possible to do something similes in Cayenne? I.e., can I make =
changes to the model and then reload the runtime, or something of the =
ilk?
>>>=20
>>> Cheers,
>>> - hugi
>>=20
>=20