commit 428ceccad0bc043fa7dae403cabf6397cfd90a01 Author: René Jochum Date: Sun Sep 25 01:44:09 2022 +0200 Initial commit diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..b3d2997 --- /dev/null +++ b/LICENSE @@ -0,0 +1,13 @@ +Copyright 2022 René Jochum + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. \ No newline at end of file diff --git a/README.md b/README.md new file mode 100644 index 0000000..1410a9b --- /dev/null +++ b/README.md @@ -0,0 +1,14 @@ +# components + +This package contains a Registry for Components "Components" and an interface to define a component. + +## Authors + +- René Jochum - rene@jochum.dev + +## License + +Its dual licensed: + +- Apache-2.0 +- GPL-2.0-or-later diff --git a/components.go b/components.go new file mode 100644 index 0000000..5504dc9 --- /dev/null +++ b/components.go @@ -0,0 +1,174 @@ +package components + +import ( + "context" + "sort" + + "go-micro.dev/v4" + "go-micro.dev/v4/errors" + "go-micro.dev/v4/server" + + "github.com/urfave/cli/v2" +) + +var ( + errorRetrievingComponents = errors.InternalServerError("RETRIEVING_COMPONENTS", "error while retrieving components") + errorComponentsIsNil = errors.InternalServerError("COMPONENTS_NIL", "components is nil") +) + +type HealthInfo struct { + Message string `json:"message"` + IsError bool `json:"is_error"` +} + +type HealthInfoMap map[string]HealthInfo + +type ComponentsKey struct{} + +type Components struct { + components map[string]Component + + service micro.Service +} + +func Context(ctx context.Context) (*Components, error) { + c, ok := ctx.Value(ComponentsKey{}).(*Components) + if !ok { + return nil, errorRetrievingComponents + } + + if c == nil { + return nil, errorComponentsIsNil + } + + return c, nil +} + +func Must(ctx context.Context) *Components { + c, err := Context(ctx) + if err != nil { + panic(err) + } + + return c +} + +func New(components ...Component) *Components { + com := &Components{components: make(map[string]Component)} + + com.Add(components...) + + return com +} + +func (c *Components) SetService(service micro.Service) { + c.service = service +} + +func (c *Components) Service() micro.Service { + return c.service +} + +func (c *Components) Add(components ...Component) { + for _, component := range components { + if component == nil { + continue + } + + if _, ok := c.components[component.Name()]; ok { + continue + } + + c.components[component.Name()] = component + } +} + +func (c *Components) Get(name string) (Component, error) { + if component, ok := c.components[name]; ok { + return component, nil + } + + return nil, errors.InternalServerError("COMPONENT_NOT_FOUND", "component '%s' has not been found", name) +} + +func (c *Components) Must(name string) Component { + component, err := c.Get(name) + if err != nil { + panic(err) + } + + return component +} + +func (c *Components) MergeFlags(flags []cli.Flag) []cli.Flag { + for _, component := range c.components { + flags = component.MergeFlags(flags) + } + + return flags +} + +func (c *Components) Initialized() bool { + for _, component := range c.components { + if !component.Initialized() { + return false + } + } + + return true +} + +func (c *Components) Init(context *cli.Context) error { + // Sort Components by Priority ASC + components := make([]Component, len(c.components)) + for _, com := range c.components { + components = append(components, com) + } + sort.SliceStable(components, func(i, j int) bool { + if components[i] == nil || components[j] == nil { + return false + } + + return components[i].Priority() < components[j].Priority() + }) + + // Init them sorted now + for _, component := range components { + if c == nil { + continue + } + + if err := component.Init(c, context); err != nil { + return err + } + } + + return nil +} + +func (c *Components) Health(context context.Context) HealthInfoMap { + result := make(HealthInfoMap, len(c.components)) + + for _, component := range c.components { + m, e := component.Health(context) + result[component.Name()] = HealthInfo{Message: m, IsError: e} + } + + return result +} + +func (c *Components) Wrapper() server.HandlerWrapper { + return func(h server.HandlerFunc) server.HandlerFunc { + return func(ctx context.Context, req server.Request, rsp interface{}) error { + ctx = context.WithValue(ctx, ComponentsKey{}, c) + + for _, component := range c.components { + if err := component.WrapperFunc(ctx, req, rsp); err != nil { + return err + } + } + + return h(ctx, req, rsp) + } + } +} diff --git a/flags.go b/flags.go new file mode 100644 index 0000000..7c26ed6 --- /dev/null +++ b/flags.go @@ -0,0 +1,27 @@ +package components + +import "github.com/urfave/cli/v2" + +func MergeFlag(flags []cli.Flag, flag cli.Flag) []cli.Flag { + has := false + for _, f := range flags { + if f.Names()[0] == flag.Names()[0] { + has = true + break + } + } + + if has { + return flags + } + + return append(flags, flag) +} + +func MergeFlags(flags []cli.Flag, newFlags ...cli.Flag) []cli.Flag { + for _, f := range newFlags { + flags = MergeFlag(flags, f) + } + + return flags +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..080fa3b --- /dev/null +++ b/go.mod @@ -0,0 +1,47 @@ +module jochum.dev/jo-micro/components + +go 1.19 + +require ( + github.com/urfave/cli/v2 v2.16.3 + go-micro.dev/v4 v4.8.1 +) + +require ( + github.com/Microsoft/go-winio v0.6.0 // indirect + github.com/ProtonMail/go-crypto v0.0.0-20220824120805-4b6e5c587895 // indirect + github.com/acomagu/bufpipe v1.0.3 // indirect + github.com/bitly/go-simplejson v0.5.0 // indirect + github.com/cloudflare/circl v1.2.0 // indirect + github.com/cpuguy83/go-md2man/v2 v2.0.2 // indirect + github.com/emirpasic/gods v1.18.1 // indirect + github.com/fsnotify/fsnotify v1.5.4 // indirect + github.com/go-git/gcfg v1.5.0 // indirect + github.com/go-git/go-billy/v5 v5.3.1 // indirect + github.com/go-git/go-git/v5 v5.4.2 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/imdario/mergo v0.3.13 // indirect + github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect + github.com/kevinburke/ssh_config v1.2.0 // indirect + github.com/miekg/dns v1.1.50 // indirect + github.com/mitchellh/go-homedir v1.1.0 // indirect + github.com/nxadm/tail v1.4.8 // indirect + github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c // indirect + github.com/patrickmn/go-cache v2.1.0+incompatible // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/russross/blackfriday/v2 v2.1.0 // indirect + github.com/sergi/go-diff v1.2.0 // indirect + github.com/xanzy/ssh-agent v0.3.2 // indirect + github.com/xrash/smetrics v0.0.0-20201216005158-039620a65673 // indirect + golang.org/x/crypto v0.0.0-20220924013350-4ba4fb4dd9e7 // indirect + golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect + golang.org/x/net v0.0.0-20220923203811-8be639271d50 // indirect + golang.org/x/sync v0.0.0-20220923202941-7f9b1623fab7 // indirect + golang.org/x/sys v0.0.0-20220919091848-fb04ddd9f9c8 // indirect + golang.org/x/text v0.3.7 // indirect + golang.org/x/tools v0.1.12 // indirect + google.golang.org/protobuf v1.28.1 // indirect + gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect + gopkg.in/warnings.v0 v0.1.2 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..3675b71 --- /dev/null +++ b/go.sum @@ -0,0 +1,229 @@ +github.com/Microsoft/go-winio v0.4.14/go.mod 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v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= diff --git a/interface.go b/interface.go new file mode 100644 index 0000000..8da120a --- /dev/null +++ b/interface.go @@ -0,0 +1,20 @@ +package components + +import ( + "context" + + "github.com/urfave/cli/v2" + "go-micro.dev/v4/server" +) + +type Component interface { + Name() string + Priority() int + Initialized() bool + Init(components *Components, context *cli.Context) error + Stop() error + MergeFlags(cli []cli.Flag) []cli.Flag + Health(context context.Context) (string, bool) + + WrapperFunc(ctx context.Context, req server.Request, rsp interface{}) error +}