增加随机负载均衡策略

balance/poll.go

@@ -49,21 +49,17 @@ type Poll struct {
 //
 // Date : 12:43 下午 2021/10/19
 func (p *Poll) GetServerNode(req *http.Request) (*define.ServerNode, error) {
-	severList := p.GetServerNodeList()
-	if len(severList) == 0 {
-		return nil, errors.New("server list is empty")
-	}
-	p.Lock()
-	defer p.Unlock()
+	p.RLock()
+	defer p.RUnlock()
 	var (
 		serverNode *define.ServerNode
 	)
 	// 循环次数
 	loopTimes := 0
-	for loopTimes < len(severList) {
+	for loopTimes < len(p.severList) {
 		loopTimes++
-		p.currentServerIndex = (p.currentServerIndex + 1) % len(severList)
-		if serverNode = severList[p.currentServerIndex]; serverNode.Status != define.ServerNodeStatusNormal {
+		p.currentServerIndex = (p.currentServerIndex + 1) % len(p.severList)
+		if serverNode = p.severList[p.currentServerIndex]; serverNode.Status != define.ServerNodeStatusNormal {
 			continue
 		}
 		break

balance/random.go

@@ -0,0 +1,59 @@
+// Package balance...
+//
+// Description : balance...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2021-11-22 6:27 下午
+package balance
+
+import (
+	"errors"
+	"net/http"
+	"sync"
+
+	"git.zhangdeman.cn/zhangdeman/gopkg/util"
+
+	"git.zhangdeman.cn/zhangdeman/gopkg/balance/define"
+)
+
+// NewRandom ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 6:29 下午 2021/11/22
+func NewRandom(severList []*define.ServerNode) (IBalance, error) {
+	if nil == severList || len(severList) == 0 {
+		return nil, errors.New("sever list is empty")
+	}
+	return &Random{
+		base{
+			lock:      &sync.RWMutex{},
+			severList: make([]*define.ServerNode, 0),
+		},
+	}, nil
+}
+
+// Random 随机负载均衡
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 6:27 下午 2021/11/22
+type Random struct {
+	base
+}
+
+// GetServerNode ...
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 6:31 下午 2021/11/22
+func (r *Random) GetServerNode(req *http.Request) (*define.ServerNode, error) {
+	r.RLock()
+	defer r.RUnlock()
+	if len(r.severList) == 0 {
+		return nil, errors.New("sever list is empty")
+	}
+	randomID := util.GetHashID(util.GenRandomString("", 128)) % uint64(len(r.severList))
+	return r.severList[int(randomID)], nil
+}