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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

1.23.0 - 2024-10-11

Added

  • Added Runtime to fxevent.Run event, which stores the runtime of a constructor or a decorator that's run, including functions created by fx.Supply and fx.Replace.

Changed

  • Overhauled the documentation website. (https://uber-go.github.io/fx/)

1.22.2 - 2024-08-07

Fixed

  • A deadlock with the relayer in signal receivers.

Changed

  • Upgrade Dig dependency to v1.18.0

1.22.1 - 2024-06-25

Fixed

  • Fx apps will only listen to signals when .Run(), .Wait(), or .Done() are called, fixing a regression introduced in v1.19.0.

1.22.0 - 2024-05-30

Added

  • Add fx.Self which can be passed to the fx.As annotation to signify that a type should be provided as itself.
  • Add fxtest.EnforceTimeout that can be passed to fxtest.NewLifecycle to force Start and Stop to return context errors when hook context expires.

Changed

  • fx.Private can now be used with fx.Supply.

Fixed

  • Fx apps will no longer listen to OS signals when they are stopped, solving blocking issues in programs that depended on OS signals after an Fx app stops.

1.21.1 - 2024-04-24

Changed

  • Register Fx provides (e.g. fx.Lifecycle, fx.Shutdowner, fx.DotGraph) before user provides, to increase likelihood of successful custom logger creation.

1.21.0 - 2024-03-13

Added

  • fxtest: Add WithTestLogger option that uses a testing.TB as the Fx event logger.
  • An fxevent logger that can log events using a slog logger has been added.

Changed

  • Upgrade Dig dependency to v1.17.1

1.20.1 - 2023-10-17

Added

  • Provided, Decorated, Supplied, and Replaced events now include a trace of module locations through which the option was given to the App.
  • wasi support.

1.20.0 - 2023-06-12

Added

  • A new event fxevent.Run is now emitted when Fx runs a constructor, decorator, or supply/replace stub.

Changed

  • fx.Populate now works with fx.Annotate.
  • Upgrade Dig dependency to v1.17.0.

1.19.3 - 2023-04-17

Changed

  • Fixed several typos in docs.
  • WASM build support.
  • Annotating In and Out structs with From/As annotations generated invalid results. The annotation check now blocks this.
  • Shutdown: Support calling from Invoke.

Deprecated

  • Deprecate ShutdownTimeout option.

Fixed

  • Respect Shutdowner ExitCode from calling Run.

1.19.2 - 2023-02-21

Changed

  • Update Dig dependency to v1.16.1.

1.19.1 - 2023-01-10

Changed

  • Calling fx.Stop() after the App has already stopped no longer errors out.

Fixed

  • Addressed a regression in 1.19.0 release which caused apps to ignore OS signals after running for startTimeout duration.

1.19.0 - 2023-01-03

Added

  • fx.RecoverFromPanics Option which allows Fx to recover from user-provided constructors and invoked functions.
  • fx.Private that allows the constructor to limit the scope of its outputs to the wrapping fx.Module.
  • ExitCode ShutdownOption which allows setting custom exit code at the end of app lifecycle.
  • Wait which returns a channel that can be used for waiting on application shutdown.
  • fxevent/ZapLogger now exposes UseLogLevel and UseErrorLevel methods to set the level of the Zap logs produced by it.
  • Add lifecycle hook-convertible methods: StartHook, StopHook, StartStopHook that can be used with more function signatures.

Changed

  • fx.WithLogger can now be passed at fx.Module level, setting custom logger at Module scope instead of the whole App.

Fixed

  • fx.OnStart and fx.OnStop Annotations now work with annotated types that was provided by the annotated constructor.
  • fxevent/ZapLogger: Errors from fx.Supply are now logged at Error level, not Info.
  • A race condition in lifecycle Start/Stop methods.
  • Typos in docs.

1.18.2 - 2022-09-28

Added

  • Clarify ordering of Invokes in Modules.

Fixed

  • Fix Decorate not being applied to transitive dependencies at root App level.

1.18.1 - 2022-08-08

Fixed

  • Fix a nil panic when nil is passed to OnStart and OnStop lifecycle methods.

1.18.0 - 2022-08-05

Added

  • Soft value groups that lets you specify value groups as best-effort dependencies.
  • fx.OnStart and fx.OnStop annotations which lets you annotate dependencies to provide OnStart and OnStop lifecycle hooks.
  • A new fxevent.Replaced event written to fxevent.Logger following an fx.Replace.

Fixed

  • Upgrade Dig dependency to v1.14.1 to address a couple of issues with decorations. Refer to Dig v1.14.1 release notes for more details.
  • fx.WithLogger no longer ignores decorations and replacements of types that it depends on.
  • Don't run lifecycle hooks if the context for them has already expired.
  • App.Start and App.Stop no longer deadlock if the OnStart/OnStop hook exits the current goroutine.
  • fxevent.ConsoleLogger no longer emits an extraneous argument for the Supplied event.

Deprecated

  • fx.Extract in favor of fx.Populate.

1.17.1 - 2022-03-23

Added

  • Logging for provide/invoke/decorate now includes the associated fx.Module name.

1.17.0 - 2022-02-28

Added

  • Add fx.Module which scopes any modifications made to the dependency graph.
  • Add fx.Decorate and fx.Replace that lets you modify a dependency graph with decorators.
  • Add fxevent.Decorated event which gets emitted upon a dependency getting decorated.

Changed

  • fx.Annotate: Validate that fx.In or fx.Out structs are not passed to it.
  • fx.Annotate: Upon failure to Provide, the error contains the actual location of the provided constructor.

1.16.0 - 2021-12-02

Added

  • Add the ability to provide a function as multiple interfaces at once using fx.As.

Changed

  • fx.Annotate: support variadic functions, and feeding value groups into them.

Fixed

  • Fix an issue where OnStop hooks weren't getting called on SIGINT on Windows.
  • Fix a data race between app.Done() and shutdown.

1.15.0 - 2021-11-08

Added

  • Add fx.Annotate to allow users to provide parameter and result tags easily without having to create fx.In or fx.Out structs.
  • Add fx.As that allows users to annotate a constructor to provide its result type(s) as interface(s) that they implement instead of the types themselves.

Fixed

  • Fix fxevent.Stopped not being logged when App.Stop is called.
  • Fix fxevent.Started or fxevent.Stopped not being logged when start or stop times out.

1.14.2 - 2021-08-16

Changed

  • For fxevent console implementation: no longer log non-error case for fxevent.Invoke event, while for zap implementation, start logging fx.Invoking case without stack.

1.14.1 - 2021-08-16

Changed

  • fxevent.Invoked was being logged at Error level even upon successful Invoke. This was changed to log at Info level when Invoke succeeded.

1.14.0 - 2021-08-12

Added

  • Introduce the new fx.WithLogger option. Provide a constructor for fxevent.Logger objects with it to customize how Fx logs events.
  • Add new fxevent package that exposes events from Fx in a structured way. Use this to write custom logger implementations for use with the fx.WithLogger option.
  • Expose and log additional information when lifecycle hooks time out.

Changed

  • Fx now emits structured JSON logs by default. These may be parsed and processed by log ingestion systems.
  • fxtest.Lifecycle now logs to the provided testing.TB instead of stderr.
  • fx.In and fx.Out are now type aliases instead of structs.

1.13.1 - 2020-08-19

Fixed

  • Fix minimum version constraint for dig. fx.ValidateGraph requires at least dig 1.10.

1.13.0 - 2020-06-16

Added

  • Added fx.ValidateGraph which allows graph cycle validation and dependency correctness without running anything. This is useful if fx.Invoke has side effects, does I/O, etc.

1.12.0 - 2020-04-09

Added

  • Added fx.Supply to provide externally created values to Fx containers without building anonymous constructors.

Changed

  • Drop library dependency on development tools.

1.11.0 - 2020-04-01

Added

  • Value groups can use the flatten option to indicate values in a slice should be provided individually rather than providing the slice itself. See package documentation for details.

1.10.0 - 2019-11-20

Added

  • All fx.Options now include readable string representations.
  • Report stack traces when fx.Provide and fx.Invoke calls fail. This should make these errors more debuggable.

Changed

  • Migrated to Go modules.

1.9.0 - 2019-01-22

Added

  • Add the ability to shutdown Fx applications from inside the container. See the Shutdowner documentation for details.
  • Add fx.Annotated to allow users to provide named values without creating a new constructor.

1.8.0 - 2018-11-06

Added

  • Provide DOT graph of dependencies in the container.

1.7.1 - 2018-09-26

Fixed

  • Make fxtest.New ensure that the app was created successfully. Previously, it would return the app (similar to fx.New, which expects the user to verify the error).
  • Update dig container to defer acyclic validation until after Invoke. Application startup time should improve proportional to the size of the dependency graph.
  • Fix a goroutine leak in fxtest.Lifecycle.

1.7.0 - 2018-08-16

Added

  • Add fx.ErrorHook option to allow users to provide ErrorHandlers on invoke failures.
  • VisualizeError returns the visualization wrapped in the error if available.

1.6.0 - 2018-06-12

Added

  • Add fx.Error option to short-circuit application startup.

1.5.0 - 2018-04-11

Added

  • Add fx.StartTimeout and fx.StopTimeout to make configuring application start and stop timeouts easier.
  • Export the default start and stop timeout as fx.DefaultTimeout.

Fixed

  • Make fxtest respect the application's start and stop timeouts.

1.4.0 - 2017-12-07

Added

  • Add fx.Populate to populate variables with values from the dependency injection container without requiring intermediate structs.

1.3.0 - 2017-11-28

Changed

  • Improve readability of hook logging in addition to provide and invoke.

Fixed

  • Fix bug which caused the OnStop for a lifecycle hook to be called even if it failed to start.

1.2.0 - 2017-09-06

Added

  • Add fx.NopLogger which disables the Fx application's log output.

1.1.0 - 2017-08-22

Changed

  • Improve readability of start up logging.

1.0.0 - 2017-07-31

First stable release: no breaking changes will be made in the 1.x series.

Added

  • fx.Extract now supports fx.In tags on target structs.

Changed

  • [Breaking] Rename fx.Inject to fx.Extract.
  • [Breaking] Rename fxtest.Must* to fxtest.Require*.

Removed

  • [Breaking] Remove fx.Timeout and fx.DefaultTimeout.

1.0.0-rc2 - 2017-07-21

  • [Breaking] Lifecycle hooks now take a context.
  • Add fx.In and fx.Out which exposes optional and named types. Modules should embed these types instead of relying on dig.In and dig.Out.
  • Add an Err method to retrieve the underlying errors during the dependency graph construction. The same error is also returned from Start.
  • Graph resolution now happens as part of fx.New, rather than at the beginning of app.Start. This allows inspection of the graph errors through app.Err() before the decision to start the app.
  • Add a Logger option, which allows users to send Fx's logs to different sink.
  • Add fxtest.App, which redirects log output to the user's testing.TB and provides some lifecycle helpers.

1.0.0-rc1 - 2017-06-20

  • [Breaking] Providing types into fx.App and invoking functions are now options passed during application construction. This makes users' interactions with modules and collections of modules identical.
  • [Breaking] TestLifecycle is now in a separate fxtest subpackage.
  • Add fx.Inject() to pull values from the container into a struct.

1.0.0-beta4 - 2017-06-12

  • [Breaking] Monolithic framework, as released in initial betas, has been broken into smaller pieces as a result of recent advances in dig library. This is a radical departure from the previous direction, but it needed to be done for the long-term good of the project.
  • [Breaking] Module interface has been scoped all the way down to being a single dig constructor. This allows for very sophisticated module compositions. See go.uber.org/dig for more information on the constructors.
  • [Breaking] package config has been moved to its own repository. see go.uber.org/config for more information.
  • fx.Lifecycle has been added for modules to hook into the framework lifecycle events.
  • service.Host interface which composed a number of primitives together (configuration, metrics, tracing) has been deprecated in favor of fx.App.

1.0.0-beta3 - 2017-03-28

  • [Breaking] Environment config provider was removed. If you were using environment variables to override YAML values, see config documentation for more information.
  • [Breaking] Simplify Provider interface: remove Scope method from the config.Provider interface, one can use either ScopedProvider and Value.Get() to access sub fields.
  • Add task.MustRegister convenience function which fails fast by panicking Note that this should only be used during app initialization, and is provided to avoid repetetive error checking for services which register many tasks.
  • Expose options on task module to disable execution. This will allow users to enqueue and consume tasks on different clusters.
  • [Breaking] Rename Backend interface Publish to Enqueue. Created a new ExecuteAsync method that will kick off workers to consume tasks and this is subsumed by module Start.
  • [Breaking] Rename package uhttp/client to uhttp/uhttpclient for clarity.
  • [Breaking] Rename PopulateStruct method in value to Populate. The method can now populate not only structs, but anything: slices, maps, builtin types and maps.
  • [Breaking] package dig has moved from go.uber.org/fx/dig to a new home at go.uber.org/dig.
  • [Breaking] Pass a tracer the uhttp/uhttpclient constructor explicitly, instead of using a global tracer. This will allow to use http client in parallel tests.

1.0.0-beta2 - 2017-03-09

  • [Breaking] Remove ulog.Logger interface and expose *zap.Logger directly.
  • [Breaking] Rename config and module from modules.rpc to modules.yarpc
  • [Breaking] Rename config key from modules.http to modules.uhttp to match the module name
  • [Breaking] Upgrade zap to v1.0.0-rc.3 (now go.uber.org/zap, was github.com/uber-go/zap)
  • Remove now-unused config.IsDevelopmentEnv() helper to encourage better testing practices. Not a breaking change as nobody is using this func themselves according to our code search tool.
  • Log traceID and spanID in hex format to match Jaeger UI. Upgrade Jaeger to min version 2.1.0 and use jaeger's adapters for jaeger and tally initialization.
  • Tally now supports reporting histogram samples for a bucket. Upgrade Tally to 2.1.0
  • [Breaking] Make new module naming consistent yarpc.ThriftModule to yarpc.New, task.NewModule to task.New
  • [Breaking] Rename yarpc.CreateThriftServiceFunc to yarpc.ServiceCreateFunc as it is not thrift-specific.
  • Report version metrics for company-wide version usage information.
  • Allow configurable service name and module name via service options.
  • DIG constructors now support returning a tuple with the second argument being an error.

1.0.0-beta1 - 2017-02-20

This is the first beta release of the framework, where we invite users to start building services on it and provide us feedback. Warning we are not promising API compatibility between beta releases and the final 1.0.0 release. In fact, we expect our beta user feedback to require some changes to the way things work. Once we reach 1.0, we will provider proper version compatibility.