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mirror of https://github.com/charlienet/go-mixed.git synced 2025-07-18 08:32:40 +08:00

更新ID生成器

This commit is contained in:
2023-10-26 14:42:23 +08:00
parent 6647f96978
commit 0d124c0b79
17 changed files with 1079 additions and 150 deletions

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package store
import (
"sync"
"github.com/charlienet/go-mixed/mathx"
)
type memStore struct {
mu sync.Mutex
machine int64
current int64
}
func NewMemStore(machineCode int64) *memStore {
return &memStore{machine: machineCode}
}
func (s *memStore) UpdateMachineCode(max int64) (int64, error) {
return s.machine, nil
}
func (s *memStore) MachineCode() int64 {
return s.machine
}
func (s *memStore) Assign(min, max, step int64) (*Segment, error) {
s.mu.Lock()
defer s.mu.Unlock()
step = mathx.Min(step, max)
start := mathx.Max(s.current, min)
end := start + step
reback := false
if start >= max {
start = min
end = step
s.current = end
reback = true
}
if end > max {
end = max
s.current = end
}
s.current = end
return &Segment{
start: start,
current: start,
end: end,
reback: reback,
}, nil
}
func (s *memStore) Close() {
}

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package store_test
import (
"testing"
"github.com/charlienet/go-mixed/idGenerator/store"
)
func TestMemSmall(t *testing.T) {
s := store.NewMemStore(2)
for i := 0; i < 10; i++ {
t.Log(s.Assign(1, 9, 20))
}
}
func TestMemBig(t *testing.T) {
s := store.NewMemStore(2)
for i := 0; i < 10; i++ {
t.Log(s.Assign(0, 99, 18))
}
}

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package store

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package store
import (
"context"
"errors"
"fmt"
"sync"
"time"
"github.com/charlienet/go-mixed/rand"
"github.com/charlienet/go-mixed/redis"
)
const (
allocatedKey = "allocated"
sequenceKey = "sequence"
delaySecond = 10
)
const (
// 机器码分配及保活,检查机器码键值是否匹配,如匹配成功对键进行延时。如不匹配需要重新申请机器码
// 请求参数 机器码,机器识别码,机器码最大值
machineLua = `
local newKey = KEYS[1]..":"..ARGV[1]
if redis.call("GET", newKey) == ARGV[2] then
redis.call("EXPIRE", newKey, 10)
return tonumber(ARGV[1])
else
for i = 0, ARGV[3], 1 do
newKey = KEYS[1]..":"..tostring(i)
if redis.call("EXISTS", newKey) == 0 then
redis.call("SET", newKey, ARGV[2], "EX", 10)
return i
end
end
return -1
end`
// 序列分配min, max, step
segmentLua = `
local key = KEYS[1]
local min = tonumber(ARGV[1])
local max = tonumber(ARGV[2])
local step = tonumber(ARGV[3])
if step > max then
step = max
end
if redis.call("EXISTS", key) == 0 then
redis.call("SET", key, step)
return {min, step, 0}
end
local begin = tonumber(redis.call("GET", key))
local increase = redis.call("INCRBY", key, step)
local reback = 0
if begin >= max then
begin = min
increase = step
redis.call("SET", key, step)
reback = 1
end
if increase > max then
increase = max
redis.call("SET", key, increase)
end
return {begin, increase, reback}
`
)
type redisStore struct {
rdb redis.Client
machinekey string // 机器码键
sequenceKey string // 序列键
value string // 随机键值
machineCode int64 // 机器码
close chan struct{} // 关闭保活协程
isRunning bool // 是否已经关闭
mu sync.Mutex
}
func NewRedisStore(key string, rdb redis.Client) *redisStore {
return &redisStore{
rdb: rdb,
machinekey: rdb.JoinKeys(key, allocatedKey),
sequenceKey: rdb.JoinKeys(key, sequenceKey),
value: rand.Hex.Generate(24),
close: make(chan struct{}),
}
}
// 分配机器标识,分配值为-1时表示分配失败
func (s *redisStore) UpdateMachineCode(max int64) (int64, error) {
err := s.updateMachine(max)
if err != nil {
return -1, err
}
// 关闭原协程,开启新的保活协程
// if s.isRunning {
// s.close <- struct{}{}
// }
// if !s.isRunning {
// s.close <- struct{}{}
go s.keepAlive(max)
// }
return s.machineCode, nil
}
func (s *redisStore) MachineCode() int64 {
return s.machineCode
}
func (s *redisStore) Assign(min, max, step int64) (*Segment, error) {
s.mu.Lock()
defer s.mu.Unlock()
ctx, cancel := context.WithTimeout(context.Background(), time.Second*2)
defer cancel()
// 序列段分配
key := s.rdb.JoinKeys(s.sequenceKey, fmt.Sprintf("%v", s.machineCode))
r, err := s.rdb.Eval(ctx, segmentLua, []string{key}, min, max, step).Result()
if err != nil {
return &Segment{}, err
}
start, end, reback := split(r)
return &Segment{start: start, end: end, current: start, reback: reback}, err
}
func split(r any) (start, end int64, reback bool) {
if result, ok := r.([]any); ok {
start = result[0].(int64)
end = result[1].(int64)
reback = result[2].(int64) == 1
}
return
}
func (s *redisStore) updateMachine(max int64) error {
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
defer cancel()
r, err := s.rdb.Eval(ctx, machineLua, []string{s.machinekey}, s.machineCode, s.value, max).Result()
if err != nil {
return err
}
if r == nil {
return errors.New("failed to obtain machine code")
}
s.machineCode = r.(int64)
if s.machineCode == -1 {
return errors.New("machine code allocation failed")
}
return nil
}
func (s *redisStore) Close() {
s.close <- struct{}{}
s.isRunning = false
}
func (s *redisStore) keepAlive(max int64) {
t := time.NewTicker(time.Second * (delaySecond / 3))
defer t.Stop()
for {
select {
case <-t.C:
// println("当前机器码:", s.machineCode)
err := s.updateMachine(max)
if err != nil {
fmt.Println("err:", err.Error())
}
case <-s.close:
println("保活停止")
return
}
}
}

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package store_test
import (
"testing"
"time"
"github.com/charlienet/go-mixed/idGenerator/store"
"github.com/charlienet/go-mixed/redis"
"github.com/charlienet/go-mixed/tests"
)
func TestSmallSerail(t *testing.T) {
tests.RunOnRedis(t, func(rdb redis.Client) {
s := store.NewRedisStore("sss", rdb)
for i := 0; i < 5; i++ {
t.Log(s.Assign(0, 9, 20))
}
}, redis.ReidsOption{Addr: "192.168.123.50:6379", Password: "123456"})
}
func TestSmallAssign(t *testing.T) {
tests.RunOnRedis(t, func(rdb redis.Client) {
s := store.NewRedisStore("sss", rdb)
for i := 0; i < 10; i++ {
t.Log(s.Assign(0, 9, 30))
}
}, redis.ReidsOption{Addr: "192.168.123.50:6379", Password: "123456"})
}
func TestBigAssign(t *testing.T) {
tests.RunOnRedis(t, func(rdb redis.Client) {
s := store.NewRedisStore("sss", rdb)
for i := 0; i < 102; i++ {
t.Log(s.Assign(0, 99, 10))
}
}, redis.ReidsOption{Addr: "192.168.123.50:6379", Password: "123456"})
}
func TestRedisAssign(t *testing.T) {
tests.RunOnRedis(t, func(rdb redis.Client) {
s := store.NewRedisStore("sss", rdb)
for i := 0; i < 10; i++ {
t.Log(s.Assign(21, 99, 30))
}
}, redis.ReidsOption{Addr: "192.168.123.50:6379", Password: "123456"})
}
func TestFullRedisAssign(t *testing.T) {
tests.RunOnRedis(t, func(rdb redis.Client) {
s := store.NewRedisStore("sss", rdb)
for i := 0; i < 10; i++ {
t.Log(s.Assign(0, 999, 99))
}
}, redis.ReidsOption{Addr: "192.168.123.50:6379", Password: "123456"})
}
func TestUpdateMachineCode(t *testing.T) {
tests.RunOnRedis(t, func(rdb redis.Client) {
for i := 0; i < 20; i++ {
s := store.NewRedisStore("id", rdb)
code, err := s.UpdateMachineCode(99)
t.Log("获取到机器标识:", code, err)
if err != nil {
return
}
time.Sleep(time.Millisecond * 100)
// s.Close()
}
time.Sleep(time.Second * 10)
}, redis.ReidsOption{Addr: "192.168.123.50:6379", Password: "123456", Prefix: "cacc"})
}
func TestUpdate(t *testing.T) {
tests.RunOnRedis(t, func(rdb redis.Client) {
s := store.NewRedisStore("id", rdb)
s.UpdateMachineCode(99)
t.Log(s.MachineCode())
s.UpdateMachineCode(99)
t.Log(s.MachineCode())
s2 := store.NewRedisStore("id", rdb)
s2.UpdateMachineCode(99)
t.Log(s2.MachineCode())
}, redis.ReidsOption{Addr: "192.168.123.50:6379", Password: "123456", Prefix: "cacc"})
}

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package store
import "fmt"
// 号段
type Segment struct {
start int64
end int64
current int64
reback bool
}
func (s *Segment) Allot() int64 {
s.current++
return s.current
}
func (s *Segment) IsEnding() bool {
return (s.current - s.start) > (s.end - s.current)
}
func (s *Segment) IsEmpty() bool {
return s.current == s.end
}
func (s *Segment) Reback() bool {
// println("回旋确认:", s.reback, s.current == (s.start+1))
return s.reback && s.current == (s.start+1)
}
func (s *Segment) String() string {
return fmt.Sprintf("start:%d-%d(%v)", s.start, s.end, s.reback)
}