manifold.lifecycle — spootnik/maniflow 0.1.0

Convention based lifecycle management of asynchronous chains. This implements a lightweight take on the ideas behind interceptors and similar libraries.

Notable differences are:

• Manifold is the sole provided execution model for chains
• No chain manipulation can occur
• Guards and finalizer for steps are optional
• Exceptions during lifecycle steps stop the execution

run clj

(run init steps)

(run init steps opts)

Run a series of potentially asynchronous steps in sequence on an initial value, threading each step's result to the next step.

Steps are maps or the following keys:

[:manifold.lifecycle/id keyword
 :manifold.lifecycle/handler
 :manifold.lifecycle/guard]

• id is the unique ID for a step

• handler is the function of the previous result

• guard is an optional predicate of the current context and previous preventing execution of the step when yielding false Accepts an options map of the following keys:

  [:manifold.lifecycle/clock :manifold.lifecycle/raw-result?]

• clock is an optional implementation of spootnik.clock/Clock, defaulting to the system's wall clock (spootnik.clock/wall-clock)

• raw-result? toggles extraction of the result out of the context map, defaults to false