From 1148bbd9689a9a99adef077f03234932c2a9771f Mon Sep 17 00:00:00 2001 From: Windfarer Date: Fri, 10 Sep 2021 21:46:16 +0800 Subject: [PATCH] refactor(contrib/config): move etcd config (#1457) * move etcd config * add with prefix to options --- contrib/config/etcd/config.go | 92 +++++++++ contrib/config/etcd/config_test.go | 66 +++++++ contrib/config/etcd/go.mod | 11 ++ contrib/config/etcd/go.sum | 301 +++++++++++++++++++++++++++++ contrib/config/etcd/watcher.go | 44 +++++ 5 files changed, 514 insertions(+) create mode 100644 contrib/config/etcd/config.go create mode 100644 contrib/config/etcd/config_test.go create mode 100644 contrib/config/etcd/go.mod create mode 100644 contrib/config/etcd/go.sum create mode 100644 contrib/config/etcd/watcher.go diff --git a/contrib/config/etcd/config.go b/contrib/config/etcd/config.go new file mode 100644 index 000000000..a18f3dc20 --- /dev/null +++ b/contrib/config/etcd/config.go @@ -0,0 +1,92 @@ +package etcd + +import ( + "context" + "errors" + + "github.com/go-kratos/kratos/v2/config" + clientv3 "go.etcd.io/etcd/client/v3" +) + +// Option is etcd config option. +type Option func(o *options) + +type options struct { + ctx context.Context + path string + prefix bool +} + +// WithContext with registry context. +func WithContext(ctx context.Context) Option { + return Option(func(o *options) { + o.ctx = ctx + }) +} + +// WithPath is config path +func WithPath(p string) Option { + return Option(func(o *options) { + o.path = p + }) +} + +// WithPrefix is config prefix +func WithPrefix(prefix bool) Option { + return Option(func(o *options) { + o.prefix = prefix + }) +} + +type source struct { + client *clientv3.Client + options *options +} + +func New(client *clientv3.Client, opts ...Option) (config.Source, error) { + options := &options{ + ctx: context.Background(), + path: "", + prefix: false, + } + + for _, opt := range opts { + opt(options) + } + + if options.path == "" { + return nil, errors.New("path invalid") + } + + return &source{ + client: client, + options: options, + }, nil +} + +// Load return the config values +func (s *source) Load() ([]*config.KeyValue, error) { + var opts []clientv3.OpOption + if s.options.prefix { + opts = append(opts, clientv3.WithPrefix()) + } + + rsp, err := s.client.Get(s.options.ctx, s.options.path, opts...) + if err != nil { + return nil, err + } + + kvs := make([]*config.KeyValue, 0) + for _, item := range rsp.Kvs { + kvs = append(kvs, &config.KeyValue{ + Key: string(item.Key), + Value: item.Value, + }) + } + return kvs, nil +} + +// Watch return the watcher +func (s *source) Watch() (config.Watcher, error) { + return newWatcher(s), nil +} diff --git a/contrib/config/etcd/config_test.go b/contrib/config/etcd/config_test.go new file mode 100644 index 000000000..c83eb6903 --- /dev/null +++ b/contrib/config/etcd/config_test.go @@ -0,0 +1,66 @@ +package etcd + +import ( + "context" + "testing" + "time" + + clientv3 "go.etcd.io/etcd/client/v3" + "google.golang.org/grpc" +) + +const testKey = "/kratos/test/config" + +func TestConfig(t *testing.T) { + client, err := clientv3.New(clientv3.Config{ + Endpoints: []string{"127.0.0.1:2379"}, + DialTimeout: time.Second, DialOptions: []grpc.DialOption{grpc.WithBlock()}, + }) + if err != nil { + t.Fatal(err) + } + defer func() { + _ = client.Close() + }() + if _, err = client.Put(context.Background(), testKey, "test config"); err != nil { + t.Fatal(err) + } + + source, err := New(client, WithPath(testKey)) + if err != nil { + t.Fatal(err) + } + + kvs, err := source.Load() + if err != nil { + t.Fatal(err) + } + + if len(kvs) != 1 || kvs[0].Key != testKey || string(kvs[0].Value) != "test config" { + t.Fatal("config error") + } + + w, err := source.Watch() + if err != nil { + t.Fatal(err) + } + defer func() { + _ = w.Stop() + }() + + if _, err = client.Put(context.Background(), testKey, "new config"); err != nil { + t.Error(err) + } + + if kvs, err = w.Next(); err != nil { + t.Fatal(err) + } + + if len(kvs) != 1 || kvs[0].Key != testKey || string(kvs[0].Value) != "new config" { + t.Fatal("config error") + } + + if _, err := client.Delete(context.Background(), testKey); err != nil { + t.Error(err) + } +} diff --git a/contrib/config/etcd/go.mod b/contrib/config/etcd/go.mod new file mode 100644 index 000000000..b8c6ccc7f --- /dev/null +++ b/contrib/config/etcd/go.mod @@ -0,0 +1,11 @@ +module github.com/go-kratos/kratos/contrib/config/etcd/v2 + +go 1.15 + +require ( + github.com/go-kratos/kratos/v2 v2.0.0 + go.etcd.io/etcd/client/v3 v3.5.0 + google.golang.org/grpc v1.40.0 +) + +replace github.com/go-kratos/kratos/v2 => ../../../ diff --git a/contrib/config/etcd/go.sum b/contrib/config/etcd/go.sum new file mode 100644 index 000000000..adaa3bc0f --- /dev/null +++ b/contrib/config/etcd/go.sum @@ -0,0 +1,301 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml 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b/contrib/config/etcd/watcher.go @@ -0,0 +1,44 @@ +package etcd + +import ( + "github.com/go-kratos/kratos/v2/config" + clientv3 "go.etcd.io/etcd/client/v3" +) + +type watcher struct { + source *source + ch clientv3.WatchChan + closeChan chan struct{} +} + +func newWatcher(s *source) *watcher { + w := &watcher{ + source: s, + closeChan: make(chan struct{}), + } + + var opts []clientv3.OpOption + if s.options.prefix { + opts = append(opts, clientv3.WithPrefix()) + } + w.ch = s.client.Watch(s.options.ctx, s.options.path, opts...) + + return w +} + +func (s *watcher) Next() ([]*config.KeyValue, error) { + select { + case _, ok := <-s.ch: + if !ok { + return nil, nil + } + return s.source.Load() + case <-s.closeChan: + return nil, nil + } +} + +func (s *watcher) Stop() error { + close(s.closeChan) + return nil +}