Each of the methods that can be overridden contain an UpdateContext parameter. This context object allows your custom actions to interact with the update process. Using the context object, your action methods have access to:
•Application Directory
This is the path on the target client
that contains the assembly hosting the Update Controller.
•Update Package Directory
This is the path on the target client
to the temporary folder. Actions can place files here or read from files
that other actions have placed. It is a temporary working directory for
the update process.
•Log
The reference to the Log object allows you to write output
to the text log file. This is primarily for diagnostic
information.
•Shared Properties
The shared properties reference exposes a
dictionary that allows you to place object references that can be consumed in
other actions, or conversely, access objects that you have placed from other
actions.
•State
The state reference allows you to get the current state
of the update that is in progress. Possible values include Prepare,
Execute, Cleanup, RollbackExecute, RollbackPrepare.