hudson.model
Interface ReconfigurableDescribable<T extends ReconfigurableDescribable<T>>

All Superinterfaces:

Describable<T>

All Known Implementing Classes:

AbstractCIBase, AbstractCloudSlave, ApiTokenProperty, AuthorizationMatrixProperty, DumbSlave, EnvironmentVariablesNodeProperty, FederatedLoginServiceUserProperty, Hudson, HudsonPrivateSecurityRealm.Details, Jenkins, JobProperty, MyViewsProperty, Node, NodeProperty, ParametersDefinitionProperty, PretendSlave, Slave, ToolLocationNodeProperty, UserProperty, UserSearchProperty, ViewProperty

public interface ReconfigurableDescribable<T extends ReconfigurableDescribable<T>>
extends Describable<T>

Marks modern Describables that allow the current instances to pass information down to the next instance when the configuration is submitted.

As the generics signature implies, it isn't up to individual Describable implementation to implement this. Rather, it is up to the designer of an extension point to mark the extension point as ReconfigurableDescribable, as it requires coordination at the owner of the extension point.

Use Cases

Invisible Property

This mechanism can be used to create an entirely invisible Describable, which is handy for NodeProperty, JobProperty, etc. To do so, define a descriptor with null display name and empty config.jelly to prevent it from showing up in the config UI, then implement reconfigure(StaplerRequest, JSONObject) and simply return this.

Passing some values without going through clients

Sometimes your Describable object may have some expensive objects that you might want to hand over to the next instance. This hook lets you do that.

Since:

1.406

Author:

Kohsuke Kawaguchi

Method Summary

T

reconfigure(org.kohsuke.stapler.StaplerRequest req, net.sf.json.JSONObject form) When a parent/owner object of a Describable gets a config form submission and instances are recreated, this method is invoked on the existing instance (meaning the 'this' reference points to the existing instance) to create a new instance to be added to the parent/owner object.

Methods inherited from interface hudson.model.Describable

getDescriptor

Method Detail

reconfigure

T reconfigure(org.kohsuke.stapler.StaplerRequest req,
              net.sf.json.JSONObject form)
                                                   throws Descriptor.FormException

When a parent/owner object of a Describable gets a config form submission and instances are recreated, this method is invoked on the existing instance (meaning the 'this' reference points to the existing instance) to create a new instance to be added to the parent/owner object.

The default implementation of this should be the following:

 return form==null ? null : getDescriptor().newInstance(req, form);
 

Parameters:

req - The current HTTP request being processed.

form - JSON fragment that corresponds to this describable object. If the newly submitted form doesn't include a fragment for this describable (meaning the user has de-selected your descriptor), then this argument is null.

Returns:

The new instance. To not to create an instance of a describable, return null.

Throws:

Descriptor.FormException