Add debug => go-debug

debug/store/buffer/buffer.go

@@ -0,0 +1,62 @@
+// Package buffer provides a simple ring buffer
+package buffer
+
+import (
+	"sync"
+
+	"github.com/micro/go-micro/debug/store"
+)
+
+type Buffer struct {
+	sync.RWMutex
+	index   map[string]int
+	records []*store.Record
+}
+
+func (b *Buffer) Read(opts ...store.ReadOption) ([]*store.Record, error) {
+	var options store.ReadOptions
+	for _, o := range opts {
+		o(&options)
+	}
+
+	b.RLock()
+	defer b.RUnlock()
+
+	if len(options.Id) > 0 {
+		idx, ok := b.index[options.Id]
+		if !ok || len(b.records) < idx {
+			return nil, store.ErrNotFound
+		}
+		return []*store.Record{b.records[idx]}, nil
+	}
+
+	return b.records, nil
+}
+
+func (b *Buffer) Write(records []*store.Record) error {
+	b.Lock()
+	defer b.Unlock()
+
+	if b.index == nil {
+		b.index = make(map[string]int)
+	}
+
+	i := len(b.records)
+
+	for _, r := range records {
+		b.index[r.Id] = i
+		i++
+		b.records = append(b.records, r)
+	}
+
+	return nil
+}
+
+func (b *Buffer) String() string {
+	return "buffer"
+}
+
+type Record struct {
+	Id    string
+	Value interface{}
+}

debug/store/store.go

@@ -0,0 +1,27 @@
+// Package store stores the various pieces of data
+package store
+
+import (
+	"errors"
+)
+
+type Store interface {
+	Read(...ReadOption) ([]*Record, error)
+	Write([]*Record) error
+	String() string
+}
+
+type Record struct {
+	Id    string
+	Value interface{}
+}
+
+type ReadOptions struct {
+	Id string
+}
+
+type ReadOption func(o *ReadOptions)
+
+var (
+	ErrNotFound = errors.New("not found")
+)