update update contents

.vscode/settings.json

@@ -47,6 +47,7 @@
   },
 "fileheader.Author":"Edward",
 "fileheader.tpl": "/*\r\n * @Description: https://github.com/crazybber\r\n * @Author: {author}\r\n * @Date: {createTime}\r\n * @Last Modified by: {lastModifiedBy}\r\n * @Last Modified time: {updateTime}\r\n */\r\n\r\n",
-"fileheader.LastModifiedBy": "Edward"
+"fileheader.LastModifiedBy": "Edward",
+"peacock.color": "#5e7959"
 }
 //https://vscode.readthedocs.io/en/latest/getstarted/settings/

resiliency/06_circuit_breaker/circuit_breaker.go

@@ -70,6 +70,16 @@ func NewRequestBreaker(opts ...Option) *RequestBreaker {
 	}
 }
 
+// Do runs the given request if the RequestBreaker accepts it.
+// Do returns an error instantly if the RequestBreaker rejects the request.
+// Otherwise, Execute returns the result of the request.
+// If a panic occurs in the request, the RequestBreaker handles it as an error and causes the same panic again.
+func (rb *RequestBreaker) Do(req func() (interface{}, error)) (interface{}, error) {
+
+	result, err := req()
+	return result, err
+}
+
 //State of current switch
 type State int