## Registering an ActivityType
To register an activity type you should use the activity_types method on the domain:
domain.activity_types.register('name', 'version', { ... })
See {ActivityTypeCollection#register} for a complete list of options.
## Deprecating an activity type
ActivityType inherits from the generic {Type} base class. Defined in {Type} are a few useful methods including:
{Type#deprecate}
{Type#deprecated?}
You can use these to deprecate an activity type:
domain.activity_types['name','version'].deprecate
@attr_reader [Time] creation_date When the workflow type was registered.
@attr_reader [Time,nil] deprecation_date When the workflow type
was deprecated, or nil if the workflow type has not been deprecated.
@attr_reader [String,nil] description The description of this workflow
type, or nil if was not set when it was registered.
@attr_reader [Symbol] status The status of this workflow type. The
status will either be `:registered` or `:deprecated`.
@attr_reader [Integer,:none,nil] default_task_heartbeat_timeout
The default maximum time specified when registering the activity type, before which a worker processing a task must report progress. If the timeout is exceeded, the activity task is automatically timed out. If the worker subsequently attempts to record a heartbeat or return a result, it will be ignored. The return value may be an integer (number of seconds), the symbol `:none` (implying no timeout) or `nil` (not specified).
@attr_reader [String,nil] default_task_list
The default task list specified for this activity type at registration. This default task list is used if a task list is not provided when a task is scheduled.
@attr_reader [Integer,:none,nil] default_task_schedule_to_close_timeout
The default maximum duration specified when registering the activity type, for tasks of this activity type. You can override this default when scheduling a task. The return value may be an integer (number of seconds), the symbol `:none` (implying no timeout) or `nil` (not specified).
@attr_reader [Integer,:none,nil] default_task_schedule_to_start_timeout
The optional default maximum duration specified when registering the activity type, that a task of an activity type can wait before being assigned to a worker. The return value may be an integer (number of seconds), the symbol `:none` (implying no timeout) or `nil` (not specified).
@attr_reader [Integer,:none,nil] default_task_start_to_close_timeout
The default maximum duration for activity tasks of this type. The return value may be an integer (number of seconds), the symbol `:none` (implying no timeout) or `nil` (not specified).