add readme and simple code

gomore/27_messages/README.md

@@ -9,3 +9,11 @@
 ![图示关系](../../images/pub-sub-pattern-1.png)
 
 图片来源：[pubsub-pattern.md](https://github.com/imsardine/dev-notes/blob/source/docs/pubsub-pattern.md)
+
+示例演示消息队的某个主题(Topic)收到用户订阅之后，的处理过程和与用户之间的响应互动。
+
+并模拟以下情形：
+
++ 主题向用户发送消息
++ 用户订阅主题
++ 用户发送某个主题消息

gomore/27_messages/message.go

@@ -8,8 +8,7 @@ import (
 
 //Message for msg in Message bus
 type Message struct {
-	//Type 类型[code :1,2,3,4]
-	Type int
+	Seq  int
 	Text string
 	From Session //消息来源
 }
@@ -106,11 +105,6 @@ func (q *Queue) AddTopic(topicName string, topicUserQueueSize int) Topic {
 	return q.Topics[topicName]
 }
 
-//String remove Subscription
-func (t *Topic) String() string {
-	return t.Name
-}
-
 func (t *Topic) findUserSubscription(uid uint64, topicName string) (Subscription, bool) {
 	// Get session or create one if it's the first
 

gomore/27_messages/message_test.go

@@ -8,7 +8,7 @@ import (
 
 ////////////////////////////////
 //通常意义上是，连接消息队列之后就可以发送消息
-////当订阅著之后才会收到相关Topic消息的推送
+//当订阅著之后才会收到相关Topic消息的推送
 //这里为了简化，直接订阅成功后发送消息，省去连接消息队列发送消息的步骤
 ////////////////////////////////
 func TestMessageSubAndPub(t *testing.T) {
@@ -41,13 +41,11 @@ func TestMessageSubAndPub(t *testing.T) {
 		}()
 
 		msg := Message{
-			//Type 类型[code :1,2,3,4]
-			Type: 1,
 			Text: "here is a apple",
 			From: Session{User{123, "lily"}, time.Now()},
 		}
 		subSCription123.Publish(msg)
-		msg.Type++
+		msg.Seq++
 		subSCription123.Publish(msg)
 	}
 
@@ -71,15 +69,13 @@ func TestMessageSubAndPub(t *testing.T) {
 		}()
 
 		msg := Message{
-			//Type 类型[code :1,2,3,4]
-			Type: 1,
 			Text: "here is a peach",
 			From: Session{User{123, "bob"}, time.Now()},
 		}
 
 		subSCription456.Publish(msg)
 
-		msg.Type++
+		msg.Seq++
 
 		subSCription456.Publish(msg)