domino/CHANGES.md at master · domino-clj/domino

fix (#24): inputs whose db value is nil are now omitted from the handler input map so destructuring defaults (:or {...}) are applied; nil inputs were previously passed as explicit nil, defeating the defaults

[BREAKING] an event handler may only write the ids it declared in :outputs; returning any other id fails the transaction with :domino.events/undeclared-outputs. An undeclared write was invisible to the graph — nothing downstream of that path was triggered and the value landed anyway — and was reachable by accident through a :post interceptor, which is composed onto every event that reads the path it hangs on
an event now runs at most once per transaction for a given set of input values. The traversal queues an event once per changed path, so a transaction changing several of one event's inputs ran the handler once for each; a handler folding into its own output accumulated once per changed input
interceptors are documented as being collected from an event's :inputs

[BREAKING] replaced async callback API (:async? true + 4-arg handler with callback) with derefable returns; async handlers now return delay/future/promise and the engine auto-derefs
on the JVM, future and promise block until resolved; in ClojureScript, delay is supported for lazy computation — truly async operations should use effects
the :async? flag is silently ignored for backward compatibility

- [BREAKING] namespaced :change-history key as :domino.core/change-history

fix: trigger effect with nested model
trigger-events removed, trigger-effects should be used instead
events will now be executed by the initialize function when initial state is provided

async event support
trigger-effects fn added to domino.core allowing triggering of effects via ids

[BREAKING] renamed initialize! to initialize since it's a pure function
[BREAKING] inputs and outputs for events are now maps containing the keys specified in the :inputs and :outputs vectors
[BREAKING] event handler functions now must return a map with keys matching the keys specified in the :outputs
updated the model parser to handle segments without an options map
introduces :pre and :post conditions
trigger-events fn added to domino.core, allowing triggering events via ids
add schema definition validation
validate for duplicate ids in model

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