auto commit

2025-12-07 21:58:18 +08:00 · 2021-04-04 02:02:06 +08:00
parent abea1071ee
commit 31e0f44b2a
5 changed files with 288 additions and 119 deletions
--- a/C#.NET/source/YitIdGen.WinFormApp/StartForm.cs
+++ b/C#.NET/source/YitIdGen.WinFormApp/StartForm.cs
@@ -25,12 +25,11 @@ namespace WInFormApp
        public static extern long NextId2();

        [DllImport("yitidgengo.dll", CallingConvention = CallingConvention.StdCall)]
-        public static extern long RegisterWorkerId(string ip, int port, string password, int maxWorkerIdNumber);
+        public static extern IntPtr RegisterMany(string ip, int port, string password, int maxWorkerIdNumber, int idCount);
        //public static extern ulong RegisterWorkerId2();

        [DllImport("yitidgengo.dll", CallingConvention = CallingConvention.StdCall)]
-        public static extern void UnRegisterWorkerId();
-
+        public static extern void UnRegister();

        [DllImport("yitidgen.dll", CallingConvention = CallingConvention.StdCall)]
        public static extern void SetWorkerId(uint workerId);
@@ -54,7 +53,12 @@ namespace WInFormApp
                var ip = "localhost";

                //txtIdList.Text += RegisterWorkerId(Encoding.UTF8.GetBytes(ip), 6379) + "\r\n";
-                txtIdList.Text += RegisterWorkerId(ip, 6379, "", 4) + "\r\n";
+                var ids = RegisterMany(ip, 6379, "", 4, 3);
+                //foreach (var id in ids)
+                //{
+                //    txtIdList.Text += id;
+                //}
+
                //txtIdList.Text += RegisterWorkerId() + "\r\n";

                //txtIdList.Text += Test() + "\r\n";
@@ -69,7 +73,7 @@ namespace WInFormApp
        {
            try
            {
-                UnRegisterWorkerId();
+                UnRegister();
                txtIdList.Text += "LogOff";
            }
            catch (Exception ex)
--- a/C#.NET/source/Yitter.IdGenTest/Program.cs
+++ b/C#.NET/source/Yitter.IdGenTest/Program.cs
@@ -10,7 +10,6 @@ namespace Yitter.OrgSystem.TestA
 {
    class Program
    {
-
        // 测试参数（默认配置下，最佳性能是10W/s）
        static int genIdCount = 50000;  // 计算ID数量（如果要验证50W效率，请将TopOverCostCount设置为20000或适当增加SeqBitLength）
        static short method = 1; // 1-漂移算法，2-传统算法
@@ -25,10 +24,39 @@ namespace Yitter.OrgSystem.TestA
        static int workerCount = 1;


+        //[DllImport("yitidgenc.dll", CallingConvention = CallingConvention.StdCall)]
+        //public static extern long NextId();
+
+        [DllImport("yitidgengo.dll", EntryPoint = "NextId", CallingConvention = CallingConvention.StdCall)]
+        public static extern long NextId2();
+
+        [DllImport("yitidgengo.so", EntryPoint = "NextId", CallingConvention = CallingConvention.StdCall)]
+        public static extern long NextId();
+
+        [DllImport("yitidgen.dll", CallingConvention = CallingConvention.StdCall)]
+        public static extern void SetWorkerId(uint workerId);
+
+        [DllImport("yitidgen.dll", CallingConvention = CallingConvention.StdCall)]
+        public static extern int TestId();
+
+        [DllImport("yitidgengo.dll", CallingConvention = CallingConvention.StdCall)]
+        public static extern long RegisterWorkerId(string ip, int port, string password, int maxWorkerIdNumber);
+        //public static extern ulong RegisterWorkerId2();
+
+        [DllImport("yitidgengo.dll", CallingConvention = CallingConvention.StdCall)]
+        public static extern void UnRegisterWorkerId();
+
+
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World! C#");

+            RegisterWorkerId();
+            while (true)
+            {
+                Thread.Sleep(20000);
+            }
+
            var options = new IdGeneratorOptions()
            {
                Method = method,
@@ -55,27 +83,19 @@ namespace Yitter.OrgSystem.TestA

            while (true)
            {
-                //RunSingle();
-                CallDll();
+                RunSingle();
+                //CallDll();
                //Go(options);
                Thread.Sleep(1000); // 每隔1秒执行一次Go
            }
        }

-        //[DllImport("yitidgenc.dll", CallingConvention = CallingConvention.StdCall)]
-        //public static extern long NextId();
-
-        [DllImport("yitidgengo.dll", EntryPoint = "NextId", CallingConvention = CallingConvention.StdCall)]
-        public static extern long NextId2();
-
-        [DllImport("yitidgengo.so", EntryPoint = "NextId", CallingConvention = CallingConvention.StdCall)]
-        public static extern long NextId();
-
-        [DllImport("yitidgen.dll", CallingConvention = CallingConvention.StdCall)]
-        public static extern void SetWorkerId(uint workerId);
-
-        [DllImport("yitidgen.dll", CallingConvention = CallingConvention.StdCall)]
-        public static extern int TestId();
+        private static void RegisterWorkerId()
+        {
+            var workerId = RegisterWorkerId("118.178.140.203", 4037, "zhou@@myredis", 4);
+            Console.WriteLine("workerId：" + workerId);
+            return;
+        }

        private static void CallDll()
        {
--- a/Go/source/idgen/SnowWorkerM2.go
+++ b/Go/source/idgen/SnowWorkerM2.go
@@ -38,6 +38,6 @@ func (m2 SnowWorkerM2) NextId() uint64 {
 		fmt.Println("Time error for {0} milliseconds", strconv.FormatInt(m2._LastTimeTick-currentTimeTick, 10))
 	}
 	m2._LastTimeTick = currentTimeTick
-	result := uint64((currentTimeTick << m2._TimestampShift)) + uint64(m2.WorkerId<<m2.SeqBitLength) + uint64(m2._CurrentSeqNumber)
+	result := uint64(currentTimeTick << m2._TimestampShift) + uint64(m2.WorkerId<<m2.SeqBitLength) + uint64(m2._CurrentSeqNumber)
 	return result
 }
--- a/Go/source/main.go
+++ b/Go/source/main.go
@@ -4,6 +4,7 @@ import (
 	"C"
 	"fmt"
 	"time"
+	"unsafe"
 	"yitidgen/idgen"
 	"yitidgen/regworkerid"
 )
@@ -19,50 +20,66 @@ func NextId() uint64 {
 	return idgen.NextId()
 }

-// 注册一个新的WorkerId
-//export RegisterWorkerId
-func RegisterWorkerId(ip *C.char, port int, password *C.char, maxWorkerId int) int {
-	return int(regworkerid.RegisterWorkerId(C.GoString(ip), port, C.GoString(password), maxWorkerId))
+// 注册一个 WorkerId，会先注销所有本机已注册的记录
+//export RegisterOne
+func RegisterOne(ip *C.char, port int32, password *C.char, maxWorkerId int32) int32 {
+	return regworkerid.RegisterOne(C.GoString(ip), port, C.GoString(password), maxWorkerId)
 }

-// 注销WorkerId
-//export UnRegisterWorkerId
-func UnRegisterWorkerId() {
-	regworkerid.UnRegisterWorkerId()
+// 注册多个 WorkerId，会先注销所有本机已注册的记录
+//export RegisterMany
+func RegisterMany(ip *C.char, port int32, password *C.char, maxWorkerId int32, totalCount int32) *C.int {
+	values := regworkerid.RegisterMany(C.GoString(ip), port, C.GoString(password), maxWorkerId, totalCount)
+	return (*C.int)(unsafe.Pointer(&values))
+}
+
+// 注销本机已注册的 WorkerId
+//export UnRegister
+func UnRegister() {
+	regworkerid.UnRegister()
 }

 // 检查本地WorkerId是否有效（0-有效，其它-无效）
-//export ValidateLocalWorkerId
-func ValidateLocalWorkerId(workerId int) int {
-	return regworkerid.ValidateLocalWorkerId(workerId)
+//export Validate
+func Validate(workerId int32) int32 {
+	return regworkerid.Validate(workerId)
 }

 func main() {
-	// 方法一：直接采用默认方法生成一个Id
-	fmt.Println("生成的Id:", idgen.NextId())
+	const testGenId = true // 测试设置

-	fmt.Println("注册的WorkerId:", regworkerid.RegisterWorkerId("localhost", 6379, "", 4))
+	if testGenId {
+		// 自定义参数
+		var options = idgen.NewIdGeneratorOptions(1)
+		options.WorkerIdBitLength = 6
+		options.SeqBitLength = 6
+		options.BaseTime = time.Date(2020, 2, 20, 2, 20, 2, 20, time.UTC).UnixNano() / 1e6
+		idgen.SetIdGenerator(options)

-	// 方法二：自定义参数
-	var options = idgen.NewIdGeneratorOptions(1)
-	options.WorkerIdBitLength = 6
-	options.SeqBitLength = 6
-	options.BaseTime = time.Date(2020, 2, 20, 2, 20, 2, 20, time.UTC).UnixNano() / 1e6
-	idgen.SetIdGenerator(options)
+		var genCount = 50000
+		for {
+			var begin = time.Now().UnixNano() / 1e3
+			for i := 0; i < genCount; i++ {
+				// 生成ID
+				idgen.NextId()
+			}
+			var end = time.Now().UnixNano() / 1e3

-	var genCount = 50000
-
-	for {
-		var begin = time.Now().UnixNano() / 1e3
-		for i := 0; i < genCount; i++ {
-			idgen.NextId()
+			fmt.Println(end - begin)
+			time.Sleep(time.Duration(1000) * time.Millisecond)
+		}
+	} else {
+		workerIdList := regworkerid.RegisterMany("localhost", 6379, "", 4, 3)
+		for _, value := range workerIdList {
+			fmt.Println("注册的WorkerId:", value)
 		}
-		var end = time.Now().UnixNano() / 1e3

-		fmt.Println(end - begin)
-		time.Sleep(time.Duration(1000) * time.Millisecond)
+		//var workerId = regworkerid.RegisterOne("localhost", 6379, "", 4)
+		//fmt.Println("注册的WorkerId:", workerId)
+
+		fmt.Println("end")
+		time.Sleep(time.Duration(300) * time.Second)
 	}
-
 }

 // go build -o ./target/yitidgengo.dll -buildmode=c-shared main.go
--- a/Go/source/regworkerid/reghelper.go
+++ b/Go/source/regworkerid/reghelper.go
@@ -13,78 +13,167 @@ var _client *redis.Client
 var _ctx = context.Background()
 var _workerIdLock sync.Mutex

-var _usingWorkerId int = -1 // 当前已注册的WorkerId
-var _loopCount int = 0      // 循环数量
-var _lifeIndex int = -1     // WorkerId本地生命时序（本地多次注册时，生命时序会不同）
-var _token int = -1         // WorkerId远程注册时用的token，将存储在 IdGen:WorkerId:Value:xx 的值中（本功能暂未启用）
+var _workerIdList []int32 // 当前已注册的WorkerId
+var _loopCount = 0        // 循环数量
+var _lifeIndex = -1       // WorkerId本地生命时序（本地多次注册时，生命时序会不同）
+var _token = -1           // WorkerId远程注册时用的token，将存储在 IdGen:WorkerId:Value:xx 的值中（本功能暂未启用）

 var _WorkerIdLifeTimeSeconds = 15    // IdGen:WorkerId:Value:xx 的值在 redis 中的有效期（单位秒，最好是3的整数倍）
 var _MaxLoopCount = 10               // 最大循环次数（无可用WorkerId时循环查找）
 var _SleepMillisecondEveryLoop = 200 // 每次循环后，暂停时间
-var _MaxWorkerId int = 0             // 最大WorkerId值，超过此值从0开始
+var _MaxWorkerId int32 = 0           // 最大WorkerId值，超过此值从0开始

-var _ConnString = ""
-var _Password = ""
+var _RedisConnString = ""
+var _RedisPassword = ""

 const _WorkerIdIndexKey string = "IdGen:WorkerId:Index"        // redis 中的key
 const _WorkerIdValueKeyPrefix string = "IdGen:WorkerId:Value:" // redis 中的key
 const _WorkerIdFlag = "Y"                                      // IdGen:WorkerId:Value:xx 的值（将来可用 _token 替代）
-const _Log = false                                             // 是否输出日志
+const _Log = true                                              // 是否输出日志

-func ValidateLocalWorkerId(workerId int) int {
-	if workerId == _usingWorkerId {
-		return 0
-	} else {
-		return -1
+func Validate(workerId int32) int32 {
+	for _, value := range _workerIdList {
+		if value == workerId {
+			return 1
+		}
 	}
+
+	return 0
+
+	//if workerId == _usingWorkerId {
+	//	return 0
+	//} else {
+	//	return -1
+	//}
 }

-func UnRegisterWorkerId() {
-	if _usingWorkerId < 0 {
-		return
-	}
-
+func UnRegister() {
 	_workerIdLock.Lock()
-	_client.Del(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(_usingWorkerId))
-	_usingWorkerId = -1
+
 	_lifeIndex = -1
+	for _, value := range _workerIdList {
+		if value > -1 {
+			_client.Del(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(int(value)))
+		}
+	}
+	_workerIdList = []int32{}
+
 	_workerIdLock.Unlock()
 }

-func RegisterWorkerId(ip string, port int, password string, maxWorkerId int) int {
-	// maxWorkerId不能小于0
+func autoUnRegister() {
+	// 如果当前已注册过 WorkerId，则先注销，并终止先前的自动续期线程
+	if len(_workerIdList) > 0 {
+		UnRegister()
+	}
+}
+
+func RegisterMany(ip string, port int32, password string, maxWorkerId int32, totalCount int32) []int32 {
+	if maxWorkerId < 0 {
+		return []int32{-2}
+	}
+
+	if totalCount < 1 {
+		return []int32{-1}
+	}
+
+	autoUnRegister()
+
+	_MaxWorkerId = maxWorkerId
+	_RedisConnString = ip + ":" + strconv.Itoa(int(port))
+	_RedisPassword = password
+	_client = newRedisClient()
+	if _client == nil {
+		return []int32{-1}
+	}
+	defer func() {
+		if _client != nil {
+			_ = _client.Close()
+		}
+	}()
+	//_, err := _client.Ping(_ctx).Result()
+	//if err != nil {
+	//	//panic("init redis error")
+	//	return []int{-3}
+	//} else {
+	//	if _Log {
+	//		fmt.Println("init redis ok")
+	//	}
+	//}
+
+	_lifeIndex++
+	_workerIdList = make([]int32, totalCount)
+	for key := range _workerIdList {
+		_workerIdList[key] = -1 // 全部初始化-1
+	}
+
+	useExtendFunc := false
+	for key := range _workerIdList {
+		id := register(_lifeIndex)
+		if id > -1 {
+			useExtendFunc = true
+			_workerIdList[key] = id //= append(_workerIdList, id)
+		} else {
+			break
+		}
+	}
+
+	if useExtendFunc {
+		go extendLifeTime(_lifeIndex)
+	}
+
+	return _workerIdList
+}
+
+func RegisterOne(ip string, port int32, password string, maxWorkerId int32) int32 {
 	if maxWorkerId < 0 {
 		return -2
 	}

-	// 如果当前已注册过 WorkerId，则先注销，并终止先前的自动续期线程
-	if _usingWorkerId > -1 {
-		UnRegisterWorkerId()
-	}
+	autoUnRegister()

 	_MaxWorkerId = maxWorkerId
-	_ConnString = ip + ":" + strconv.Itoa(port)
-	_Password = password
+	_RedisConnString = ip + ":" + strconv.Itoa(int(port))
+	_RedisPassword = password
+	_loopCount = 0
 	_client = newRedisClient()
-	defer _client.Close()
-
-	_, err := _client.Ping(_ctx).Result()
-	if err != nil {
-		panic("init redis error")
-	} else {
-		if _Log {
-			fmt.Println("init redis ok")
+	if _client == nil {
+		return -3
+	}
+	defer func() {
+		if _client != nil {
+			_ = _client.Close()
 		}
+	}()
+	//_, err := _client.Ping(_ctx).Result()
+	//if err != nil {
+	//	// panic("init redis error")
+	//	return -3
+	//} else {
+	//	if _Log {
+	//		fmt.Println("init redis ok")
+	//	}
+	//}
+
+	_lifeIndex++
+	var id = register(_lifeIndex)
+	if id > -1 {
+		_workerIdList = []int32{id}
+		go extendLifeTime(_lifeIndex)
 	}

+	return id
+}
+
+func register(lifeTime int) int32 {
 	_loopCount = 0
-	return getNextWorkerId()
+	return getNextWorkerId(lifeTime)
 }

 func newRedisClient() *redis.Client {
 	return redis.NewClient(&redis.Options{
-		Addr:     _ConnString,
-		Password: _Password,
+		Addr:     _RedisConnString,
+		Password: _RedisPassword,
 		DB:       0,
 		//PoolSize:     1000,
 		//ReadTimeout:  time.Millisecond * time.Duration(100),
@@ -93,16 +182,16 @@ func newRedisClient() *redis.Client {
 	})
 }

-func getNextWorkerId() int {
+func getNextWorkerId(lifeTime int) int32 {
 	// 获取当前 WorkerIdIndex
 	r, err := _client.Incr(_ctx, _WorkerIdIndexKey).Result()
 	if err != nil {
-		return 0
+		return -1
 	}

-	candidateId := int(r)
+	candidateId := int32(r)
 	if _Log {
-		fmt.Println("Begin candidateId:" + strconv.Itoa(candidateId))
+		fmt.Println("Begin candidateId:" + strconv.Itoa(int(candidateId)))
 	}

 	// 如果 candidateId 大于最大值，则重置
@@ -128,7 +217,7 @@ func getNextWorkerId() int {
 				fmt.Println("canReset loop")
 			}

-			return getNextWorkerId()
+			return getNextWorkerId(lifeTime)
 		} else {
 			// 如果有其它应用正在编辑，则本应用暂停200ms后，再继续
 			time.Sleep(time.Duration(200) * time.Millisecond)
@@ -137,46 +226,45 @@ func getNextWorkerId() int {
 				fmt.Println("not canReset loop")
 			}

-			return getNextWorkerId()
+			return getNextWorkerId(lifeTime)
 		}
 	}

 	if _Log {
-		fmt.Println("candidateId:" + strconv.Itoa(candidateId))
+		fmt.Println("candidateId:" + strconv.Itoa(int(candidateId)))
 	}

 	if isAvailable(candidateId) {
 		if _Log {
-			fmt.Println("AA: isAvailable:" + strconv.Itoa(candidateId))
+			fmt.Println("AA: isAvailable:" + strconv.Itoa(int(candidateId)))
 		}

 		// 最新获得的 WorkerIdIndex，在 redis 中是可用状态
 		setWorkerIdFlag(candidateId)
-		_usingWorkerId = candidateId
 		_loopCount = 0

 		// 获取到可用 WorkerId 后，启用新线程，每隔 1/3个 _WorkerIdLifeTimeSeconds 时间，向服务器续期（延长一次 LifeTime）
-		_lifeIndex++
-		go extendWorkerIdLifeTime(_lifeIndex)
+		// go extendWorkerIdLifeTime(lifeTime, candidateId)

 		return candidateId
 	} else {
 		if _Log {
-			fmt.Println("BB: not isAvailable:" + strconv.Itoa(candidateId))
+			fmt.Println("BB: not isAvailable:" + strconv.Itoa(int(candidateId)))
 		}
 		// 最新获得的 WorkerIdIndex，在 redis 中是不可用状态，则继续下一个 WorkerIdIndex
-		return getNextWorkerId()
+		return getNextWorkerId(lifeTime)
 	}
 }

-func extendWorkerIdLifeTime(lifeIndex int) {
+func extendLifeTime(lifeIndex int) {
+	// 获取到可用 WorkerId 后，启用新线程，每隔 1/3个 _WorkerIdLifeTimeSeconds 时间，向服务器续期（延长一次 LifeTime）
 	var myLifeIndex = lifeIndex

 	// 循环操作：间隔一定时间，刷新 WorkerId 在 redis 中的有效时间。
 	for {
 		time.Sleep(time.Duration(_WorkerIdLifeTimeSeconds/3) * time.Second)

-		// 上锁操作，防止跟 UnRegisterWorkerId 操作重叠
+		// 上锁操作，防止跟 UnRegister 操作重叠
 		_workerIdLock.Lock()

 		// 如果临时变量 myLifeIndex 不等于 全局变量 _lifeIndex，表明全局状态被修改，当前线程可终止，不应继续操作 redis
@@ -185,12 +273,44 @@ func extendWorkerIdLifeTime(lifeIndex int) {
 		}

 		// 已经被注销，则终止（此步是上一步的二次验证）
-		if _usingWorkerId < 0 {
+		if len(_workerIdList) < 1 {
 			break
 		}

 		// 延长 redis 数据有效期
-		extendWorkerIdFlag(_usingWorkerId)
+		for _, value := range _workerIdList {
+			if value > -1 {
+				extendWorkerIdFlag(value)
+			}
+		}
+
+		_workerIdLock.Unlock()
+	}
+}
+
+func extendWorkerIdLifeTime(lifeIndex int, workerId int32) {
+	var myLifeIndex = lifeIndex
+	var myWorkerId = workerId
+
+	// 循环操作：间隔一定时间，刷新 WorkerId 在 redis 中的有效时间。
+	for {
+		time.Sleep(time.Duration(_WorkerIdLifeTimeSeconds/3) * time.Second)
+
+		// 上锁操作，防止跟 UnRegister 操作重叠
+		_workerIdLock.Lock()
+
+		// 如果临时变量 myLifeIndex 不等于 全局变量 _lifeIndex，表明全局状态被修改，当前线程可终止，不应继续操作 redis
+		if myLifeIndex != _lifeIndex {
+			break
+		}
+
+		// 已经被注销，则终止（此步是上一步的二次验证）
+		//if _usingWorkerId < 0 {
+		//	break
+		//}
+
+		// 延长 redis 数据有效期
+		extendWorkerIdFlag(myWorkerId)

 		_workerIdLock.Unlock()
 	}
@@ -212,14 +332,22 @@ func setWorkerIdIndex(val int) {
 	_client.Set(_ctx, _WorkerIdIndexKey, val, 0)
 }

-func setWorkerIdFlag(index int) {
-	_client.Set(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(index), _WorkerIdFlag, time.Duration(_WorkerIdLifeTimeSeconds)*time.Second)
+func setWorkerIdFlag(workerId int32) {
+	_client.Set(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(int(workerId)), _WorkerIdFlag, time.Duration(_WorkerIdLifeTimeSeconds)*time.Second)
 }

-func extendWorkerIdFlag(index int) {
+func extendWorkerIdFlag(workerId int32) {
 	var client = newRedisClient()
-	defer client.Close()
-	client.Expire(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(index), time.Duration(_WorkerIdLifeTimeSeconds)*time.Second)
+	if client == nil {
+		return
+	}
+	defer func() {
+		if client != nil {
+			_ = client.Close()
+		}
+	}()
+
+	client.Expire(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(int(workerId)), time.Duration(_WorkerIdLifeTimeSeconds)*time.Second)
 }

 func canReset() bool {
@@ -229,7 +357,7 @@ func canReset() bool {
 	}

 	if _Log {
-		fmt.Println("canReset:" + string(r))
+		fmt.Println("canReset:" + strconv.Itoa(int(r)))
 	}

 	return r != 1
@@ -240,16 +368,16 @@ func endReset() {
 	_client.Set(_ctx, _WorkerIdValueKeyPrefix+"Edit", 0, 0)
 }

-func getWorkerIdFlag(index int) (string, bool) {
-	r, err := _client.Get(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(index)).Result()
+func getWorkerIdFlag(workerId int32) (string, bool) {
+	r, err := _client.Get(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(int(workerId))).Result()
 	if err != nil {
 		return "", false
 	}
 	return r, true
 }

-func isAvailable(index int) bool {
-	r, err := _client.Get(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(index)).Result()
+func isAvailable(workerId int32) bool {
+	r, err := _client.Get(_ctx, _WorkerIdValueKeyPrefix+strconv.Itoa(int(workerId))).Result()

 	if _Log {
 		fmt.Println("XX isAvailable:" + r)