From 3a7ee2395d3ac92e24e59f633e3d57bcb92ad583 Mon Sep 17 00:00:00 2001
From: jingyugao <1121087373@qq.com>
Date: Thu, 10 Oct 2019 17:30:37 +0800
Subject: [PATCH] =?UTF-8?q?=E6=8B=86=E5=B0=81receiveMessages?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 client/simple_canal_connector.go | 49 +--------------------------
 protocol/Message.go              | 57 ++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+), 48 deletions(-)

diff --git a/client/simple_canal_connector.go b/client/simple_canal_connector.go
index c2071fa..93a22db 100644
--- a/client/simple_canal_connector.go
+++ b/client/simple_canal_connector.go
@@ -306,54 +306,7 @@ func (c *SimpleCanalConnector) receiveMessages() (*pb.Message, error) {
 	if err != nil {
 		return nil, err
 	}
-	p := new(pb.Packet)
-	err = proto.Unmarshal(data, p)
-	if err != nil {
-		return nil, err
-	}
-	messages := new(pb.Messages)
-	message := new(pb.Message)
-
-	length := len(messages.Messages)
-	message.Entries = make([]pb.Entry, length)
-	ack := new(pb.Ack)
-	var items []pb.Entry
-	var entry pb.Entry
-	switch p.Type {
-	case pb.PacketType_MESSAGES:
-		if !(p.GetCompression() == pb.Compression_NONE) {
-			panic("compression is not supported in this connector")
-		}
-		err := proto.Unmarshal(p.Body, messages)
-		if err != nil {
-			return nil, err
-		}
-		if c.LazyParseEntry {
-			message.RawEntries = messages.Messages
-		} else {
-
-			for _, value := range messages.Messages {
-				err := proto.Unmarshal(value, &entry)
-				if err != nil {
-					return nil, err
-				}
-				items = append(items, entry)
-			}
-		}
-		message.Entries = items
-		message.Id = messages.GetBatchId()
-		return message, nil
-
-	case pb.PacketType_ACK:
-		err := proto.Unmarshal(p.Body, ack)
-		if err != nil {
-			return nil, err
-		}
-		panic(errors.New(fmt.Sprintf("something goes wrong with reason:%s", ack.GetErrorMessage())))
-	default:
-		panic(errors.New(fmt.Sprintf("unexpected packet type:%s", p.Type)))
-
-	}
+	return pb.Decode(data, c.LazyParseEntry)
 }
 
 //Ack Ack Canal-server的数据（就是昨晚某些逻辑操作后删除canal-server端的数据）
diff --git a/protocol/Message.go b/protocol/Message.go
index a9530e4..44b8ad3 100644
--- a/protocol/Message.go
+++ b/protocol/Message.go
@@ -16,6 +16,13 @@
 
 package com_alibaba_otter_canal_protocol
 
+import (
+	"errors"
+	"fmt"
+
+	"github.com/gogo/protobuf/proto"
+)
+
 type Message struct {
 	Id         int64
 	Entries    []Entry
@@ -27,3 +34,53 @@ func NewMessage(id int64) *Message {
 	message := &Message{Id: id, Entries: nil, Raw: false, RawEntries: nil}
 	return message
 }
+
+func Decode(data []byte, lazyParseEntry bool) (*Message, error) {
+	p := new(Packet)
+	err := proto.Unmarshal(data, p)
+	if err != nil {
+		return nil, err
+	}
+	messages := new(Messages)
+	message := new(Message)
+
+	length := len(messages.Messages)
+	message.Entries = make([]Entry, length)
+	ack := new(Ack)
+	var items []Entry
+	var entry Entry
+	switch p.Type {
+	case PacketType_MESSAGES:
+		if !(p.GetCompression() == Compression_NONE) {
+			panic("compression is not supported in this connector")
+		}
+		err := proto.Unmarshal(p.Body, messages)
+		if err != nil {
+			return nil, err
+		}
+		if lazyParseEntry {
+			message.RawEntries = messages.Messages
+		} else {
+
+			for _, value := range messages.Messages {
+				err := proto.Unmarshal(value, &entry)
+				if err != nil {
+					return nil, err
+				}
+				items = append(items, entry)
+			}
+		}
+		message.Entries = items
+		message.Id = messages.GetBatchId()
+		return message, nil
+
+	case PacketType_ACK:
+		err := proto.Unmarshal(p.Body, ack)
+		if err != nil {
+			return nil, err
+		}
+		panic(errors.New(fmt.Sprintf("something goes wrong with reason:%s", ack.GetErrorMessage())))
+	default:
+		panic(errors.New(fmt.Sprintf("unexpected packet type:%s", p.Type)))
+	}
+}