# Changelog ## v0.17.4 ### Bug fixes - Register event handler and process manager subscriptions on process start ([#272](https://github.com/commanded/commanded/pull/272)). ## v0.17.3 ### Bug fixes - Fix snapshot recording ([#196](https://github.com/commanded/commanded/pull/196)). - Fixed warning about deprecated time unit in elixir 1.8 ([#239](https://github.com/commanded/commanded/pull/239)). ## v0.17.2 ### Enhancements - Remove default `error/4` callback function from process manager to silence deprecation warning. ## v0.17.1 ### Enhancements - Support `Phoenix.PubSub` v1.1.0. ### Bug fixes - Set default aggregate lifespan timeout to `:infinity` ([#200](https://github.com/commanded/commanded/pull/200)). ## v0.17.0 ### Enhancements - Ability to globally override `include_execution_result` and `include_aggregate_version` in environment config ([#168](https://github.com/commanded/commanded/pull/168)). - Handle custom type serialization in snapshot source type ([#165](https://github.com/commanded/commanded/pull/165)). - Fix compiler warnings in generated code (routers, event handlers, and process managers). - Add `InMemory.reset!/0` for testing purposes ([#175](https://github.com/commanded/commanded/pull/175)). ### Bug fixes - Ensure process managers can be configured with `:strong` consistency. - Fix error when subscription process already tracked ([#180](https://github.com/commanded/commanded/pull/180)). ## v0.16.0 - Support composite command routers ([#111](https://github.com/commanded/commanded/pull/111)). - Aggregate state snapshots ([#121](https://github.com/commanded/commanded/pull/121)). - New `error/3` callback for process manager and deprecated `error/4` ([#124](https://github.com/commanded/commanded/pull/124)) - Router support for identity prefix function. - Retry command execution on concurrency error ([#132](https://github.com/commanded/commanded/pull/132)). - Event handler `error/3` callback ([#133](https://github.com/commanded/commanded/pull/133)). - Support distributed dispatch consistency ([#135](https://github.com/commanded/commanded/pull/135)). - Defer event handler and process router init until after subscribed ([#138](https://github.com/commanded/commanded/pull/138)). - Replace aggregate lifespan `after_command/1` callback with `after_event/1` ([#139](https://github.com/commanded/commanded/issues/139)). - Support process manager routing to multiple instances ([#141](https://github.com/commanded/commanded/pull/141)). - Allow a default consistency to be set via the application env ([#150](https://github.com/commanded/commanded/pull/150)). - Command dispatch consistency using explicit handler names ([#161](https://github.com/commanded/commanded/pull/161)). ### Breaking changes - The `Commanded.Aggregates.AggregateLifespan` behaviour has been changed from `after_command/1` to `after_event/1`. You will need to update your own lifespan modules to use events instead of commands to shutdown an aggregate process after an inactivity timeout. ### Upgrading Please ensure you upgrade the following event store dependencies. Using the Elixir [EventStore](https://github.com/commanded/eventstore): - `eventstore` to [v0.14.0](https://hex.pm/packages/eventstore) - `commanded_eventstore_adapter` to [v0.4.0](https://hex.pm/packages/commanded_eventstore_adapter) Using Greg Young's [Event Store](https://eventstore.org/): - `commanded_extreme_adapter` to [v0.5.0](https://hex.pm/packages/commanded_extreme_adapter) ## v0.15.1 ### Bug fixes - Event handler `child_spec/1` must include config options defined by use macro. ## v0.15.0 ### Enhancements - Process manager command dispatch error handling ([#93](https://github.com/commanded/commanded/issues/93)). - Event handlers may define an `init/0` callback function to start any related processes. It must return `:ok`, otherwise the handler process will be stopped. - Add `include_execution_result` option to command dispatch ([#96](https://github.com/commanded/commanded/pull/96)). - Add `Commanded.Aggregate.Multi` ([#98](https://github.com/commanded/commanded/pull/98)) as a way to return multiple events from a command dispatch that require aggregate state to be updated after each event. - Correlation and causation ids ([#105](https://github.com/commanded/commanded/pull/105)). - Initial support for running on a cluster of nodes ([#80](https://github.com/commanded/commanded/pull/80)). ### Bug fixes - Adding a prefix to the aggregate in the router breaks the strong consistency of command dispatch ([#101](https://github.com/commanded/commanded/issues/101)). ### Upgrading Please ensure you upgrade the following event store dependencies. Using the Elixir [EventStore](https://github.com/commanded/eventstore): - `eventstore` to [v0.13.0](https://hex.pm/packages/eventstore) - `commanded_eventstore_adapter` to [v0.3.0](https://hex.pm/packages/commanded_eventstore_adapter) Using Greg's [Event Store](https://eventstore.org/): - `commanded_extreme_adapter` to [v0.4.0](https://hex.pm/packages/commanded_extreme_adapter) ## v0.14.0 ### Enhancements - Dispatch command with `:eventual` or `:strong` consistency guarantee ([#82](https://github.com/commanded/commanded/issues/82)). - Additional stream prefix per aggregate ([#77](https://github.com/commanded/commanded/issues/77)). - Include custom metadata during command dispatch ([#61](https://github.com/commanded/commanded/issues/61)). - Validate command dispatch registration in router ([59](https://github.com/commanded/commanded/issues/59)). ### Upgrading Please ensure you upgrade the following event store dependencies. Using the Elixir [EventStore](https://github.com/commanded/eventstore): - `eventstore` to [v0.11.0](https://hex.pm/packages/eventstore) - `commanded_eventstore_adapter` to [v0.2.0](https://hex.pm/packages/commanded_eventstore_adapter) Using Greg's [Event Store](https://eventstore.org/): - `commanded_extreme_adapter` to [v0.3.0](https://hex.pm/packages/commanded_extreme_adapter) ## v0.13.0 ### Enhancements - Command dispatch optionally returns aggregate version, using `include_aggregate_version: true` during dispatch. ## v0.12.0 ### Enhancements - `Commanded.Event.Handler` and `Commanded.ProcessManagers.ProcessManager` macros to simplify defining, and starting, event handlers and process managers. Note the previous approach to defining and starting may still be used, so this is *not* a breaking change. ## v0.11.0 ### Enhancements - Shutdown idle aggregate processes ([#43](https://github.com/commanded/commanded/issues/43)). ## v0.10.0 ### Enhancements - Extract event store integration to a behaviour (`Commanded.EventStore`). This defines the contract to be implemented by an event store adapter. It allows additional event store databases to be used with Commanded. By default, a `GenServer` in-memory event store adapter is used. This should **only be used for testing** as there is no persistence. The existing PostgreSQL-based [eventstore](https://github.com/commanded/eventstore) integration has been extracted as a separate package ([commanded_eventstore_adapter](https://github.com/commanded/commanded-eventstore-adapter)). There is also a new adapter for Greg Young's Event Store using the Extreme library ([commanded_extreme_adapter](https://github.com/commanded/commanded-extreme-adapter)). You must install the required event store adapter package and update your environment configuration to specify the `:event_store_adapter` module. See the [README](https://github.com/commanded/commanded/blob/master/README.md) for details. ## v0.9.0 ### Enhancements - Stream events from event store when rebuilding aggregate state. ## v0.8.5 ### Enhancements - Upgrade to Elixir 1.4 and remove compiler warnings. ## v0.8.4 ### Enhancements - Event handler and process manager subscriptions should be created from a given stream position ([#14](https://github.com/commanded/commanded/issues/14)). - Stop process manager instance after reaching its final state ([#24](https://github.com/commanded/commanded/issues/24)). ## v0.8.3 ### Enhancements - Middleware `after_failure` callback is executed even when a middleware halts execution. ## v0.8.2 ### Bug fixes - JsonSerializer should ensure event type atom exists when deserializing ([#28](https://github.com/commanded/commanded/issues/28)). ## v0.8.1 ### Enhancements - Command handlers should be optional by default ([#30](https://github.com/commanded/commanded/issues/30)). ## v0.8.0 ### Enhancements - Simplify aggregates and process managers ([#31](https://github.com/commanded/commanded/issues/31)). ## v0.7.1 ### Bug fixes - Restarting aggregate process should load all events from its stream in batches. The Event Store read stream default limit is 1,000 events. ## v0.7.0 ### Enhancements - Command handling middleware allows a command router to define middleware modules that are executed before, and after success or failure of each command dispatch ([#12](https://github.com/commanded/commanded/issues/12)). ## v0.6.3 ### Enhancements - Process manager instance processes event non-blocking to prevent timeout during event processing and any command dispatching. It persists last seen event id to ensure events are handled only once. ## v0.6.2 ### Enhancements - Command dispatch timeout. Allow a `timeout` value to be configured during command registration or dispatch. This overrides the default timeout of 5 seconds. The same as the default `GenServer` call timeout. ### Bug fixes - Fix pending aggregates restarts: supervisor restarts aggregate process but it cannot accept commands ([#22](https://github.com/commanded/commanded/pull/22)). ## v0.6.1 ### Enhancements - Upgrade `eventstore` mix dependency to v0.6.0 to use support for recorded events created_at as `NaiveDateTime`. ## v0.6.0 ### Enhancements - Confirm receipt of events in event handler and process manager router ([#19](https://github.com/commanded/commanded/pull/19)). - Convert keys to atoms when decoding JSON using Poison decoder. - Prefix process manager instance snapshot uuid with process manager name. - Multi command dispatch registration in router ([#16](https://github.com/commanded/commanded/issues/16)). ## v0.5.0 ### Enhancements - Include event metadata as second argument to event handlers. An event handler must now implement the `Commanded.Event.Handler` behaviour consisting of a single `handle_event/2` function. ## v0.4.0 ### Enhancements - Macro to assist with building process managers ([README](https://github.com/commanded/commanded/tree/feature/process-manager-macro#process-managers)). ## v0.3.1 ### Enhancements - Include unit test event assertion function: `assert_receive_event/2` ([#13](https://github.com/commanded/commanded/pull/13)). - Include top level application in mix config. ## v0.3.0 ### Enhancements - Don't persist an aggregate's pending events when executing a command returns an error ([#10](https://github.com/commanded/commanded/pull/10)). ### Bug fixes - Ensure an aggregate's pending events are persisted in the order they were applied. ## v0.2.1 ### Enhancements - Support integer, atom or strings as an aggregate UUID ([#7](https://github.com/commanded/commanded/pull/7)).