First-Generation Managed Packaging Developer Guide

First-Generation Managed Packages
Why Switch to Second-Generation Managed Packaging?
Move to 2GP: Migrate Your Managed Packages with Ease
Register a Namespace for a First-Generation Managed Package
Create a First-Generation Managed Package Using a UI
Create a First-Generation Managed Package using Salesforce DX
Components Available in First-Generation Managed Packages
Behavior of Specific Metadata in First-Generation Managed Packages
Package and Test Your First-Generation Managed Package
Install a Managed Package
Install First-Generation Managed Packages Using Metadata API
Component Availability After Deployment
Install Notifications for Unauthorized Managed Packages
Resolve Apex Test Failures
Run Apex on Package Install/Upgrade
Run Apex on Package Uninstall
How Does an Uninstall Script Work?
Example of an Uninstall Script
Specifying an Uninstall Script
Uninstall a First-Generation Managed Package
Update Your First-Generation Managed Package
Publish Upgrades to First-Generation Managed Packages
Manage Licenses for Managed Packages
Manage Features in First-Generation Managed Packages
AppExchange App Analytics for First-Generation Managed Packages
Developing and Distributing Unmanaged Packages
PDF

How Does an Uninstall Script Work?

An uninstall script is an Apex class that implements the UninstallHandler interface. This interface has a single method called onUninstall that specifies the actions to be performed on uninstall.
1global interface UninstallHandler {
2  void onUninstall(UninstallContext context)
3}
The onUninstall method takes a context object as its argument, which provides the following information.
  • The org ID of the organization in which the uninstall takes place.
  • The user ID of the user who initiated the uninstall.
The context argument is an object whose type is the UninstallContext interface. This interface is automatically implemented by the system. The following definition of the UninstallContext interface shows the methods you can call on the context argument.
1global interface UninstallContext { 
2  ID organizationId();
3  ID uninstallerId();
4}