From ea16f5f8253645c94f347e154bdc60f34b2c6ee2 Mon Sep 17 00:00:00 2001
From: Vasiliy Tolstov <v.tolstov@unistack.org>
Date: Wed, 4 Aug 2021 16:04:58 +0300
Subject: [PATCH] config/default: not implement watcher as it cant change

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
---
 config/default.go      | 13 ++-----
 config/default_test.go | 50 --------------------------
 config/watcher.go      | 81 ------------------------------------------
 3 files changed, 2 insertions(+), 142 deletions(-)
 delete mode 100644 config/watcher.go

diff --git a/config/default.go b/config/default.go
index ded6d79c..88102821 100644
--- a/config/default.go
+++ b/config/default.go
@@ -2,6 +2,7 @@ package config
 
 import (
 	"context"
+	"fmt"
 	"reflect"
 	"strconv"
 	"strings"
@@ -270,17 +271,7 @@ func (c *defaultConfig) Name() string {
 }
 
 func (c *defaultConfig) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
-	w := &defaultWatcher{
-		opts:  c.opts,
-		wopts: NewWatchOptions(opts...),
-		done:  make(chan struct{}),
-		vchan: make(chan map[string]interface{}),
-		echan: make(chan error),
-	}
-
-	go w.run()
-
-	return w, nil
+	return nil, fmt.Errorf("not implemented")
 }
 
 // NewConfig returns new default config source
diff --git a/config/default_test.go b/config/default_test.go
index 8a64a336..dfb4c5fb 100644
--- a/config/default_test.go
+++ b/config/default_test.go
@@ -4,7 +4,6 @@ import (
 	"context"
 	"fmt"
 	"testing"
-	"time"
 
 	"github.com/unistack-org/micro/v3/config"
 )
@@ -18,55 +17,6 @@ type Cfg struct {
 	IntValue int `default:"99"`
 }
 
-func TestWatch(t *testing.T) {
-	ctx := context.Background()
-
-	conf := &Cfg{IntValue: 10}
-
-	cfg := config.NewConfig(config.Struct(conf))
-	if err := cfg.Init(); err != nil {
-		t.Fatal(err)
-	}
-	if err := cfg.Load(ctx); err != nil {
-		t.Fatal(err)
-	}
-
-	w, err := cfg.Watch(ctx, config.WatchInterval(200*time.Millisecond, 500*time.Millisecond))
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	defer func() {
-		_ = w.Stop()
-	}()
-
-	done := make(chan struct{})
-
-	go func() {
-		for {
-			mp, err := w.Next()
-			if err != nil {
-				t.Fatal(err)
-			}
-			if len(mp) != 1 {
-				t.Fatal(fmt.Errorf("default watcher err: %v", mp))
-			}
-
-			v, ok := mp["IntValue"]
-			if !ok {
-				t.Fatal(fmt.Errorf("default watcher err: %v", v))
-			}
-			if nv, ok := v.(int); !ok || nv != 99 {
-				t.Fatal(fmt.Errorf("default watcher err: %v", v))
-			}
-			close(done)
-			return
-		}
-	}()
-
-	<-done
-}
-
 func TestDefault(t *testing.T) {
 	ctx := context.Background()
 	conf := &Cfg{IntValue: 10}
diff --git a/config/watcher.go b/config/watcher.go
deleted file mode 100644
index 3e7563ea..00000000
--- a/config/watcher.go
+++ /dev/null
@@ -1,81 +0,0 @@
-package config
-
-import (
-	"reflect"
-
-	"github.com/unistack-org/micro/v3/util/jitter"
-	rutil "github.com/unistack-org/micro/v3/util/reflect"
-)
-
-type defaultWatcher struct {
-	opts  Options
-	wopts WatchOptions
-	done  chan struct{}
-	vchan chan map[string]interface{}
-	echan chan error
-}
-
-func (w *defaultWatcher) run() {
-	ticker := jitter.NewTicker(w.wopts.MinInterval, w.wopts.MaxInterval)
-	defer ticker.Stop()
-
-	src := w.opts.Struct
-	if w.wopts.Struct != nil {
-		src = w.wopts.Struct
-	}
-
-	for {
-		select {
-		case <-w.done:
-			return
-		case <-ticker.C:
-			dst, err := rutil.Zero(src)
-			if err == nil {
-				err = fillValues(reflect.ValueOf(dst), w.opts.StructTag)
-			}
-			if err != nil {
-				w.echan <- err
-				return
-			}
-			srcmp, err := rutil.StructFieldsMap(src)
-			if err != nil {
-				w.echan <- err
-				return
-			}
-			dstmp, err := rutil.StructFieldsMap(dst)
-			if err != nil {
-				w.echan <- err
-				return
-			}
-			for sk, sv := range srcmp {
-				if reflect.DeepEqual(dstmp[sk], sv) {
-					delete(dstmp, sk)
-				}
-			}
-			if len(dstmp) > 0 {
-				w.vchan <- dstmp
-				src = dst
-			}
-		}
-	}
-}
-
-func (w *defaultWatcher) Next() (map[string]interface{}, error) {
-	select {
-	case <-w.done:
-		break
-	case err := <-w.echan:
-		return nil, err
-	case v, ok := <-w.vchan:
-		if !ok {
-			break
-		}
-		return v, nil
-	}
-	return nil, ErrWatcherStopped
-}
-
-func (w *defaultWatcher) Stop() error {
-	close(w.done)
-	return nil
-}