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reactor
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An asynchronous, graph-based execution engine
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CHANGELOG.md
# Change Log
All notable changes to this project will be documented in this file.
See [Conventional Commits](Https://conventionalcommits.org) for commit guidelines.
<!-- changelog -->
## [v0.12.1](https://github.com/ash-project/reactor/compare/v0.12.0...v0.12.1) (2025-02-04)
### Bug Fixes:
* Correctly pass guards into `flunk` step. (#158)
* Runtime step planning with intermediate results. (#156)
## [v0.12.0](https://github.com/ash-project/reactor/compare/v0.11.0...v0.12.0) (2025-02-01)
### Features:
* template: Add `template` step which renders an EEx template. (#154)
### Improvements:
* Verify step name uniqueness recursively. (#153)
## [v0.11.0](https://github.com/ash-project/reactor/compare/v0.10.3...v0.11.0) (2025-01-28)
### Features:
* Add `where` and `guard` entities to steps. (#148)
## [v0.10.3](https://github.com/ash-project/reactor/compare/v0.10.2...v0.10.3) (2024-12-19)
### Improvements:
* make igniter optional
## [v0.10.2](https://github.com/ash-project/reactor/compare/v0.10.1...v0.10.2) (2024-12-01)
### Improvements:
* DSL: Add `description` options to most DSL entities. (#137)
## [v0.10.1](https://github.com/ash-project/reactor/compare/v0.10.0...v0.10.1) (2024-11-06)
### Bug Fixes:
* Switch: Don't duplicate outside steps inside switch matches. (#133)
* Don't raise error when switch is missing default branch (#129)
## [v0.10.0](https://github.com/ash-project/reactor/compare/v0.9.1...v0.10.0) (2024-09-15)
### Features:
* Reactor.Dsl.Flunk: Add a special step type which always fails. (#125)
## [v0.9.1](https://github.com/ash-project/reactor/compare/v0.9.0...v0.9.1) (2024-08-12)
### Bug Fixes:
* `Reactor.run!/4` should not return an `:ok` tuple.
## [v0.9.0](https://github.com/ash-project/reactor/compare/v0.8.5...v0.9.0) (2024-07-18)
### Features:
* map: Add the ability to map over elements of a collection inside a reactor. (#123)
* map: Add the ability to map over elements of a collection inside a reactor.
### Bug Fixes:
* automatically pass extra arguments from the map step to nested steps.
* spurious test failures seemingly caused by `Mimic`.
### Improvements:
* throw a more helpful error when a step returns an invalid result.
## [v0.8.5](https://github.com/ash-project/reactor/compare/v0.8.4...v0.8.5) (2024-07-10)
### Improvements:
* add `mix reactor.install` (#124)
## [v0.8.4](https://github.com/ash-project/reactor/compare/v0.8.3...v0.8.4) (2024-05-25)
### Bug Fixes:
* inability to store composed reactors at compile time.
## [v0.8.3](https://github.com/ash-project/reactor/compare/v0.8.2...v0.8.3) (2024-05-24)
### Bug Fixes:
* Missing `__identifier__` field in `compose` DSL struct.
## [v0.8.2](https://github.com/ash-project/reactor/compare/v0.8.1...v0.8.2) (2024-05-08)
### Bug Fixes:
* initialisation issue with middlewares.
## [v0.8.1](https://github.com/ash-project/reactor/compare/v0.8.0...v0.8.1) (2024-03-20)
### Bug Fixes:
* RunStepError: pass entire step struct instead of just name when raising.
## [v0.8.0](https://github.com/ash-project/reactor/compare/v0.7.0...v0.8.0) (2024-03-18)
### Breaking Changes:
* Use `Splode` for managing errors. (#97)
### Bug Fixes:
* Don't assume `UndefinedFunctionError` means the module is not a Reactor.
### Improvements:
* Add template guards.
## [v0.7.0](https://github.com/ash-project/reactor/compare/v0.6.0...v0.7.0) (2024-02-28)
### Features:
* Add telemetry middleware. (#93)
* Add a middleware which emits telemetry events about Reactor.
### Bug Fixes:
* incorrect function arity for `Group.after_fun` DSL.
### Improvements:
* don't incur compile-time dependencies on middleware.
## [v0.6.0](https://github.com/ash-project/reactor/compare/v0.5.2...v0.6.0) (2024-02-26)
### Breaking Changes:
* Remove hooks and replace with middleware behaviour. (#90)
* Remove hooks and replace with middleware behaviour.
### Improvements:
* Middleware: Add `get_process_context/0` and `set_process_context/1` middleware hooks.
* Add step event callback to middleware.
## [v0.5.2](https://github.com/ash-project/reactor/compare/v0.5.1...v0.5.2) (2024-02-18)
### Bug Fixes:
* callback spec for `Reactor.Step.async?/1`.
### Performance Improvements:
* Don't iterate the entire graph every time through the loop. (#88)
## [v0.5.1](https://github.com/ash-project/reactor/compare/v0.5.0...v0.5.1) (2024-02-14)
### Improvements:
* Move `can?/2` and `async?/1` into `Reactor.Step` behaviour. (#87)
## [v0.5.0](https://github.com/ash-project/reactor/compare/v0.4.1...v0.5.0) (2024-02-07)
### Features:
* Add lifecycle hooks to Reactor (#83)
### Bug Fixes:
* don't deadlock when lots of async reactors are sharing a concurrency pool. (#36)
* weird issue with aliases sometimes not being expanded in generated reactors. (#58)
### Improvements:
* Add ability for steps to decide at runtime whether they should be run asyncronously. (#84)
## [v0.4.1](https://github.com/ash-project/reactor/compare/v0.4.0...v0.4.1) (2023-09-26)
### Bug Fixes:
* weird issue with aliases sometimes not being expanded in generated reactors.
## [v0.4.0](https://github.com/ash-project/reactor/compare/v0.3.5...v0.4.0) (2023-09-11)
### Features:
* Add `collect` step entity. (#53)
## [v0.3.5](https://github.com/ash-project/reactor/compare/v0.3.4...v0.3.5) (2023-09-06)
### Improvements:
* Template: Abstract template type so that it can be used by extensions.
## [v0.3.4](https://github.com/ash-project/reactor/compare/v0.3.3...v0.3.4) (2023-09-04)
### Bug Fixes:
* Allow `reactor` DSL section to be patched.
* Reactor: fix call to `use Spark.Dsl`.
## [v0.3.3](https://github.com/ash-project/reactor/compare/v0.3.2...v0.3.3) (2023-09-01)
### Improvements:
* Dsl: Extract DSL entities into their target modules. (#50)
## [v0.3.2](https://github.com/ash-project/reactor/compare/v0.3.1...v0.3.2) (2023-07-27)
### Bug Fixes:
* Don't swallow errors when a step runs out of retries. (#41)
## [v0.3.1](https://github.com/ash-project/reactor/compare/v0.3.0...v0.3.1) (2023-07-24)
### Improvements:
* Add `wait_for` DSL. (#39)
* Add "subpaths" to templates. (#31)
* Step.Debug: Add `debug` step and DSL. (#30)
* Step.Switch: Add `switch` DSL and step type. (#29)
## [v0.3.0](https://github.com/ash-project/reactor/compare/v0.2.4...v0.3.0) (2023-07-03)
### Features:
* Step.Around: Add ability to wrap a function around a group of steps. (#24)
### Bug Fixes:
* Executor: don't double-iterate the graph each time through the loop.
### Improvements:
* Add `group` DSL entity and `Reactor.Step.Group`. (#27)
* Reactor.Executor: track concurrent process usage across multiple reactors. (#26)
* Support `timeout` and `async?` Reactor options. (#20)
* Invert DSL entity building. (#19)
* Allow entire step behaviour to be defined in the DSL. (#18)
### Performance Improvements:
* Dsl: Build and pre-plan DSL reactors.
* Builder: build transformation steps as synchronous.
## [v0.2.4](https://github.com/ash-project/reactor/compare/v0.2.3...v0.2.4) (2023-06-15)
### Improvements:
* Add ability to compose reactors.
* Builder: rename internally generated steps to start with `:__reactor__`. (#10)
## [v0.2.3](https://github.com/ash-project/reactor/compare/v0.2.2...v0.2.3) (2023-06-07)
### Improvements:
* Add step-wide argument transforms. (#9)
* Add step-wide argument transforms.
## [v0.2.2](https://github.com/ash-project/reactor/compare/v0.2.1...v0.2.2) (2023-05-15)
### Bug Fixes:
* Reactor.Argument: Remove spurious `is_atom` constraint on `Argument.from_input/2..3`.
## [v0.2.1](https://github.com/ash-project/reactor/compare/v0.2.0...v0.2.1) (2023-05-12)
### Improvements:
* Reactor.Step: remove `can?/1` and replace with optional callbacks. (#6)
## [v0.2.0](https://github.com/ash-project/reactor/compare/v0.1.0...v0.2.0) (2023-05-10)
### Features:
* implement basic reactor behaviour. (#1)
## [v0.1.0](https://github.com/ash-project/reactor/compare/v0.1.0...v0.1.0) (2023-04-19)