Default value for new properties in plugin configuration

[Marcin Zajączkowski]

Hi,

In the plugin I would like to add new properties which should be set to
default values when upgrading from the older plugin versions.

I've read that it can be done in Jelly, but it only applies to the
situation when Jenkins configuration is saved. In my case after upgrade
values are deserialized from XML configuration which does not have those
values. The new integer field is set to 0 (no entry in XML) which is not
the best value for me. I tried to set default value in code, but it is
overridden when extension instance is created at Jenkins startup.

How can I set a default value to a new plugin configuration property to
be set when Jenkins is restarted after plugin upgrade?

Marcin

--
http://blog.solidsoft.info/ - Working code is not enough

[Daniel Beck]

> On 22.04.2016, at 23:06, Marcin Zajączkowski <msz...@wp.pl> wrote:
>
> How can I set a default value to a new plugin configuration property to
> be set when Jenkins is restarted after plugin upgrade?

To do this when your object is loaded, use readResolve, and if null, set whatever the new default is. Needs a nullable field to work, of course.

More here: https://wiki.jenkins-ci.org/display/JENKINS/Hint+on+retaining+backward+compatibility

[Marcin Zajączkowski]

That looks like something I need. Thanks Daniel.

Marcin