implement watcher
Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
This commit is contained in:
parent
fcfa2f31d8
commit
7828935a5b
118
consul.go
118
consul.go
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@ -3,10 +3,12 @@ package consul
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import (
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"context"
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"fmt"
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"reflect"
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"github.com/hashicorp/consul/api"
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"github.com/imdario/mergo"
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"github.com/unistack-org/micro/v3/config"
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"github.com/unistack-org/micro/v3/util/jitter"
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rutil "github.com/unistack-org/micro/v3/util/reflect"
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)
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@ -104,11 +106,16 @@ func (c *consulConfig) Load(ctx context.Context, opts ...config.LoadOption) erro
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mopts = append(mopts, mergo.WithAppendSlice)
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}
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src, err := rutil.Zero(c.opts.Struct)
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dst := c.opts.Struct
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if options.Struct != nil {
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dst = options.Struct
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}
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src, err := rutil.Zero(dst)
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if err == nil {
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err = c.opts.Codec.Unmarshal(pair.Value, src)
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if err == nil {
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err = mergo.Merge(c.opts.Struct, src, mopts...)
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err = mergo.Merge(dst, src, mopts...)
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}
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}
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@ -160,6 +167,113 @@ func (c *consulConfig) Name() string {
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return c.opts.Name
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}
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func (c *consulConfig) Watch(ctx context.Context, opts ...config.WatchOption) (config.Watcher, error) {
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w := &consulWatcher{
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cli: c.cli,
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path: c.path,
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opts: c.opts,
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wopts: config.NewWatchOptions(opts...),
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done: make(chan struct{}),
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vchan: make(chan map[string]interface{}),
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echan: make(chan error),
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}
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go w.run()
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return w, nil
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}
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type consulWatcher struct {
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cli *api.Client
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path string
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opts config.Options
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wopts config.WatchOptions
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done chan struct{}
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vchan chan map[string]interface{}
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echan chan error
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}
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func (w *consulWatcher) run() {
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ticker := jitter.NewTicker(w.wopts.MinInterval, w.wopts.MaxInterval)
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defer ticker.Stop()
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src := w.opts.Struct
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if w.wopts.Struct != nil {
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src = w.wopts.Struct
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}
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for {
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select {
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case <-w.done:
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return
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case <-ticker.C:
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dst, err := rutil.Zero(src)
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if err != nil {
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w.echan <- err
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return
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}
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pair, _, err := w.cli.KV().Get(w.path, nil)
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if err != nil {
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w.echan <- err
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return
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}
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if pair == nil {
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w.echan <- fmt.Errorf("consul path %s not found", w.path)
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return
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}
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err = w.opts.Codec.Unmarshal(pair.Value, dst)
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if err != nil {
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w.echan <- err
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return
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}
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srcmp, err := rutil.StructFieldsMap(src)
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if err != nil {
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w.echan <- err
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return
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}
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dstmp, err := rutil.StructFieldsMap(dst)
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if err != nil {
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w.echan <- err
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return
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}
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for sk, sv := range srcmp {
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if reflect.DeepEqual(dstmp[sk], sv) {
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delete(dstmp, sk)
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}
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}
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w.vchan <- dstmp
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src = dst
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}
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}
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}
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func (w *consulWatcher) Next() (map[string]interface{}, error) {
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select {
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case <-w.done:
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break
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case err := <-w.echan:
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return nil, err
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case v, ok := <-w.vchan:
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if !ok {
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break
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}
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return v, nil
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}
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return nil, config.ErrWatcherStopped
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}
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func (w *consulWatcher) Stop() error {
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close(w.done)
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return nil
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}
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func NewConfig(opts ...config.Option) config.Config {
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options := config.NewOptions(opts...)
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if len(options.StructTag) == 0 {
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2
go.mod
2
go.mod
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@ -9,5 +9,5 @@ require (
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github.com/hashicorp/golang-lru v0.5.3 // indirect
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github.com/imdario/mergo v0.3.12
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github.com/pkg/errors v0.9.1 // indirect
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github.com/unistack-org/micro/v3 v3.4.0
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github.com/unistack-org/micro/v3 v3.5.8
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)
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10
go.sum
10
go.sum
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@ -7,15 +7,15 @@ github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kB
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github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
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github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
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github.com/ef-ds/deque v1.0.4/go.mod h1:gXDnTC3yqvBcHbq2lcExjtAcVrOnJCbMcZXmuj8Z4tg=
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github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
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github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
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github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
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github.com/golang-jwt/jwt v3.2.2+incompatible/go.mod h1:8pz2t5EyA70fFQQSrl6XZXzqecmYZeUEB8OUGHkxJ+I=
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github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
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github.com/google/btree v1.0.0 h1:0udJVsspx3VBr5FwtLhQQtuAsVc79tTq0ocGIPAU6qo=
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github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
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github.com/google/uuid v1.2.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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github.com/hashicorp/consul/api v1.8.1 h1:BOEQaMWoGMhmQ29fC26bi0qb7/rId9JzZP2V0Xmx7m8=
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github.com/hashicorp/consul/api v1.8.1/go.mod h1:sDjTOq0yUyv5G4h+BqSea7Fn6BU+XbolEz1952UB+mk=
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github.com/hashicorp/consul/sdk v0.7.0 h1:H6R9d008jDcHPQPAqPNuydAshJ4v5/8URdFnUvK/+sc=
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@ -25,8 +25,6 @@ github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brv
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github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
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github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
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github.com/hashicorp/go-hclog v0.12.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
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github.com/hashicorp/go-hclog v0.16.0 h1:uCeOEwSWGMwhJUdpUjk+1cVKIEfGu2/1nFXukimi2MU=
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github.com/hashicorp/go-hclog v0.16.0/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
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github.com/hashicorp/go-hclog v0.16.1 h1:IVQwpTGNRRIHafnTs2dQLIk4ENtneRIEEJWOVDqz99o=
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github.com/hashicorp/go-hclog v0.16.1/go.mod h1:whpDNt7SSdeAju8AWKIWsul05p54N/39EeqMAyrmvFQ=
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github.com/hashicorp/go-immutable-radix v1.0.0 h1:AKDB1HM5PWEA7i4nhcpwOrO2byshxBjXVn/J/3+z5/0=
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@ -97,8 +95,8 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
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github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
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github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
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github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
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github.com/unistack-org/micro/v3 v3.4.0 h1:z9F3lgAb2j4cZ1ib5qBj66JPYUAzR4sNIJqUDjVwyVQ=
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github.com/unistack-org/micro/v3 v3.4.0/go.mod h1:LXmPfbJnJNvL0kQs8HfnkV3Wya2Wb+C7keVq++RCZnk=
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github.com/unistack-org/micro/v3 v3.5.8 h1:7kuNW7Pih3LYUA0DuVt9l87LjtT4rsqDFyTYLrLtNNI=
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github.com/unistack-org/micro/v3 v3.5.8/go.mod h1:zQnZPEy842kQNcyjmVys6tdMjty4PHdyUUKYm1wrg1s=
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golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
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golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
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golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392 h1:ACG4HJsFiNMf47Y4PeRoebLNy/2lXT9EtprMuTFWt1M=
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