diff --git a/README.md b/README.md index bc026d6..25fcc57 100644 --- a/README.md +++ b/README.md @@ -4,11 +4,10 @@ Bootstrap package for building Services in Go, Handle Signaling and Config comin ## Example ```golang - - func main() { kernel := snout.Kernel[Config]{ RunE: Run, + Shutdown: Shutdown, } kernelBootstrap := kernel.Bootstrap( context.Background(), @@ -31,9 +30,13 @@ type Config struct { } `snout:"app"` } -func Run(ctx context.Context, cfg Config) error{ +func Run(ctx context.Context, cfg Config) error { // // .. // } + +func Shutdown(ctx context.Context) error { + // shutdown stuff +} ``` diff --git a/bootstrap.go b/bootstrap.go index a44d880..7c9685e 100644 --- a/bootstrap.go +++ b/bootstrap.go @@ -25,9 +25,10 @@ var logger = slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{AddSou // ServiceConfig is a generic type for service configuration. type ServiceConfig any -// Kernel represents a service kernel with a run function. +// Kernel represents a service kernel with run and shutdown functions. type Kernel[T ServiceConfig] struct { - RunE func(ctx context.Context, cfg T) error + RunE func(ctx context.Context, cfg T) error + Shutdown func(ctx context.Context) error } // Env represents the environment configuration. @@ -84,20 +85,22 @@ func (k *Kernel[T]) Bootstrap(ctx context.Context, opts ...Options) KernelBootst opt(kernelOpts) } - ctx = setUpSignalHandling(ctx) + ctx, cancel := setUpSignalHandling(ctx, k) cfg := k.fetchVars(kernelOpts) - return KernelBootstrap[T]{ctx, cfg, k.RunE} + return KernelBootstrap[T]{ctx, cfg, k.RunE, k.Shutdown, cancel} } -// KernelBootstrap holds the context, configuration, and run function for the kernel. +// KernelBootstrap holds the context, configuration, and run/shutdown functions for the kernel. type KernelBootstrap[T ServiceConfig] struct { - context context.Context - cfg T - runE func(ctx context.Context, cfg T) error + context context.Context + cfg T + runE func(ctx context.Context, cfg T) error + shutdown func(ctx context.Context) error + cancel context.CancelFunc } -// Initialize validates the configuration and runs the kernel. +// Initialize validates the configuration, runs the kernel, and handles shutdown. func (kb KernelBootstrap[T]) Initialize() (err error) { validate := validator.New() @@ -118,7 +121,19 @@ func (kb KernelBootstrap[T]) Initialize() (err error) { } }() - return kb.runE(kb.context, kb.cfg) + // Run the main function + if err = kb.runE(kb.context, kb.cfg); err != nil { + return err + } + + // Call the shutdown function if defined + if kb.shutdown != nil { + if shutdownErr := kb.shutdown(kb.context); shutdownErr != nil { + return shutdownErr + } + } + + return nil } // ErrPanic is an error indicating a panic occurred. @@ -161,11 +176,21 @@ func (k *Kernel[T]) fetchVars(options *KernelOptions) T { return cfg } -// setUpSignalHandling sets up a context with signal notifications. -func setUpSignalHandling(ctx context.Context) context.Context { - ctx, _ = signal.NotifyContext(ctx, syscall.SIGTERM, syscall.SIGINT) +// setUpSignalHandling sets up a context with signal notifications and handles shutdown. +func setUpSignalHandling(ctx context.Context, kernel any) (context.Context, context.CancelFunc) { + ctx, cancel := context.WithCancel(ctx) + signals := make(chan os.Signal, 1) + signal.Notify(signals, syscall.SIGTERM, syscall.SIGINT) + + go func() { + <-signals + if k, ok := kernel.(*Kernel[any]); ok && k.Shutdown != nil { + _ = k.Shutdown(ctx) // Call Shutdown if defined + } + cancel() + }() - return ctx + return ctx, cancel } // setDefaultValues sets default values recursively for configuration fields. diff --git a/bootstrap_test.go b/bootstrap_test.go index 2f6f863..5eb8d21 100644 --- a/bootstrap_test.go +++ b/bootstrap_test.go @@ -5,6 +5,7 @@ import ( "fmt" "github.com/chiguirez/snout/v3" "os" + "syscall" "testing" "time" @@ -395,3 +396,39 @@ func (s *snoutSuite) TestBooleanPanic() { }) }) } + +func (s *snoutSuite) TestKernelWithShutdown() { + s.Run("Given a Kernel with a Shutdown function", func() { + shutdownCalled := false + + kernel := snout.Kernel[struct{}]{ + RunE: func(ctx context.Context, _ struct{}) error { + <-ctx.Done() + return nil + }, + Shutdown: func(ctx context.Context) error { + shutdownCalled = true + return nil + }, + } + + s.Run("When a termination signal is sent", func() { + ctx, cancel := context.WithCancel(context.Background()) + defer cancel() + + go func() { + // Simulate sending a SIGTERM signal + time.Sleep(100 * time.Millisecond) + p, _ := os.FindProcess(os.Getpid()) + _ = p.Signal(syscall.SIGTERM) + }() + + err := kernel.Bootstrap(ctx).Initialize() + + s.Run("Then the Shutdown function is called", func() { + s.Require().NoError(err) + s.Require().True(shutdownCalled) + }) + }) + }) +} diff --git a/go.mod b/go.mod index 8629cee..3f3f000 100644 --- a/go.mod +++ b/go.mod @@ -1,7 +1,9 @@ module github.com/chiguirez/snout/v3 +go 1.24.3 + require ( - github.com/go-playground/validator/v10 v10.22.0 + github.com/go-playground/validator/v10 v10.26.0 github.com/mitchellh/mapstructure v1.5.0 github.com/octago/sflags v0.2.0 github.com/spf13/pflag v1.0.5 @@ -12,7 +14,7 @@ require ( require ( github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect github.com/fsnotify/fsnotify v1.7.0 // indirect - github.com/gabriel-vasile/mimetype v1.4.4 // indirect + github.com/gabriel-vasile/mimetype v1.4.8 // indirect github.com/go-playground/locales v0.14.1 // indirect github.com/go-playground/universal-translator v0.18.1 // indirect github.com/hashicorp/hcl v1.0.0 // indirect @@ -28,13 +30,11 @@ require ( github.com/subosito/gotenv v1.6.0 // indirect go.uber.org/atomic v1.9.0 // indirect go.uber.org/multierr v1.9.0 // indirect - golang.org/x/crypto v0.24.0 // indirect + golang.org/x/crypto v0.33.0 // indirect golang.org/x/exp v0.0.0-20230905200255-921286631fa9 // indirect - golang.org/x/net v0.26.0 // indirect - golang.org/x/sys v0.21.0 // indirect - golang.org/x/text v0.16.0 // indirect + golang.org/x/net v0.34.0 // indirect + golang.org/x/sys v0.30.0 // indirect + golang.org/x/text v0.22.0 // indirect gopkg.in/ini.v1 v1.67.0 // indirect gopkg.in/yaml.v3 v3.0.1 // indirect ) - -go 1.18 diff --git a/go.sum b/go.sum index 08a11ac..ca1f46d 100644 --- a/go.sum +++ b/go.sum @@ -3,22 +3,27 @@ github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM= github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8= +github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0= github.com/fsnotify/fsnotify v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA= github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM= -github.com/gabriel-vasile/mimetype v1.4.4 h1:QjV6pZ7/XZ7ryI2KuyeEDE8wnh7fHP9YnQy+R0LnH8I= -github.com/gabriel-vasile/mimetype v1.4.4/go.mod h1:JwLei5XPtWdGiMFB5Pjle1oEeoSeEuJfJE+TtfvdB/s= +github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM= +github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8= github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s= +github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4= github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA= github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY= github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY= github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY= -github.com/go-playground/validator/v10 v10.22.0 h1:k6HsTZ0sTnROkhS//R0O+55JgM8C4Bx7ia+JlgcnOao= -github.com/go-playground/validator/v10 v10.22.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM= +github.com/go-playground/validator/v10 v10.26.0 h1:SP05Nqhjcvz81uJaRfEV0YBSSSGMc/iMaVtFbr3Sw2k= +github.com/go-playground/validator/v10 v10.26.0/go.mod h1:I5QpIEbmr8On7W0TktmJAumgzX4CA1XNl4ZmDuVHKKo= github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38= +github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY= github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4= github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ= github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE= +github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk= github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY= +github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE= github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ= github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI= github.com/magiconair/properties v1.8.7 h1:IeQXZAiQcpL9mgcAe1Nu6cX9LLw6ExEHKjN0VQdvPDY= @@ -33,6 +38,7 @@ github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZN github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U= github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8= +github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs= github.com/sagikazarmark/locafero v0.4.0 h1:HApY1R9zGo4DBgr7dqsTH/JJxLTTsOt7u6keLGt6kNQ= github.com/sagikazarmark/locafero v0.4.0/go.mod h1:Pe1W6UlPYUk/+wc/6KFhbORCfqzgYEpgQ3O5fPuL3H4= github.com/sagikazarmark/slog-shim v0.1.0 h1:diDBnUNK9N/354PgrxMywXnAwEr1QZcOr6gto+ugjYE= @@ -63,18 +69,19 @@ go.uber.org/atomic v1.9.0 h1:ECmE8Bn/WFTYwEW/bpKD3M8VtR/zQVbavAoalC1PYyE= go.uber.org/atomic v1.9.0/go.mod h1:fEN4uk6kAWBTFdckzkM89CLk9XfWZrxpCo0nPH17wJc= go.uber.org/multierr v1.9.0 h1:7fIwc/ZtS0q++VgcfqFDxSBZVv/Xo49/SYnDFupUwlI= go.uber.org/multierr v1.9.0/go.mod h1:X2jQV1h+kxSjClGpnseKVIxpmcjrj7MNnI0bnlfKTVQ= -golang.org/x/crypto v0.24.0 h1:mnl8DM0o513X8fdIkmyFE/5hTYxbwYOjDS/+rK6qpRI= -golang.org/x/crypto v0.24.0/go.mod h1:Z1PMYSOR5nyMcyAVAIQSKCDwalqy85Aqn1x3Ws4L5DM= +golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus= +golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M= golang.org/x/exp v0.0.0-20230905200255-921286631fa9 h1:GoHiUyI/Tp2nVkLI2mCxVkOjsbSXD66ic0XW0js0R9g= golang.org/x/exp v0.0.0-20230905200255-921286631fa9/go.mod h1:S2oDrQGGwySpoQPVqRShND87VCbxmc6bL1Yd2oYrm6k= -golang.org/x/net v0.26.0 h1:soB7SVo0PWrY4vPW/+ay0jKDNScG2X9wFeYlXIvJsOQ= -golang.org/x/net v0.26.0/go.mod h1:5YKkiSynbBIh3p6iOc/vibscux0x38BZDkn8sCUPxHE= -golang.org/x/sys v0.21.0 h1:rF+pYz3DAGSQAxAu1CbC7catZg4ebC4UIeIhKxBZvws= -golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= -golang.org/x/text v0.16.0 h1:a94ExnEXNtEwYLGJSIUxnWoxoRz/ZcCsV63ROupILh4= -golang.org/x/text v0.16.0/go.mod h1:GhwF1Be+LQoKShO3cGOHzqOgRrGaYc9AvblQOmPVHnI= +golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0= +golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k= +golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc= +golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= +golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM= +golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY= gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo= +gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA= gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k= gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=