/
store.go
237 lines (213 loc) · 5.21 KB
/
store.go
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package taskino
import (
"fmt"
"github.com/go-redis/redis"
"math/rand"
"strings"
"sync"
"time"
)
type TaskStore interface {
GetRemoteVersion() (int64, error)
GetAllTriggers() (map[string]string, error)
SaveAllTriggers(version int64, triggers map[string]string) error
GrabTask(name string) (bool, error)
SaveLastRunTime(name string, lastRun *time.Time) error
GetLastRunTime(name string) (*time.Time, error)
GetAllLastRunTimes() (map[string]*time.Time, error)
}
type MemoryTaskStore struct {
triggers map[string]string
lastRuns map[string]*time.Time
version int64
*sync.Mutex // protect lastRuns
}
func NewMemoryTaskStore() *MemoryTaskStore {
return &MemoryTaskStore{
Mutex: &sync.Mutex{},
triggers: make(map[string]string),
lastRuns: make(map[string]*time.Time),
version: 0,
}
}
func (s *MemoryTaskStore) GetRemoteVersion() (int64, error) {
return s.version, nil
}
func (s *MemoryTaskStore) GetAllTriggers() (map[string]string, error) {
return s.triggers, nil
}
func (s *MemoryTaskStore) SaveAllTriggers(version int64, triggers map[string]string) error {
s.triggers = triggers
s.version = version
return nil
}
func (s *MemoryTaskStore) GrabTask(name string) (bool, error) {
return true, nil
}
func (s *MemoryTaskStore) SaveLastRunTime(name string, lastRun *time.Time) error {
s.Lock()
defer s.Unlock()
s.lastRuns[name] = lastRun
return nil
}
func (s *MemoryTaskStore) GetLastRunTime(name string) (*time.Time, error) {
s.Lock()
defer s.Unlock()
return s.lastRuns[name], nil
}
func (s *MemoryTaskStore) GetAllLastRunTimes() (map[string]*time.Time, error) {
s.Lock()
defer s.Unlock()
r := map[string]*time.Time{}
for k, v := range s.lastRuns {
r[k] = v
}
return r, nil
}
type RedisStore struct {
clients []*redis.Client
}
func NewRedisStore(clients ...*redis.Client) *RedisStore {
return &RedisStore{clients: clients}
}
func (s *RedisStore) execute(consumer func(*redis.Client)) {
var i = rand.Int31n(int32(len(s.clients)))
var client = s.clients[i]
consumer(client)
}
type RedisTaskStore struct {
redis *RedisStore
group string
lockAge int
}
func NewRedisTaskStore(redis *RedisStore, group string, lockAge int) *RedisTaskStore {
return &RedisTaskStore{redis, group, lockAge}
}
func (s *RedisTaskStore) GrabTask(name string) (r bool, e error) {
s.redis.execute(func(redis *redis.Client) {
var key = s.keyFor("task_lock", name)
var cmd = redis.SetNX(key, "true", time.Second*time.Duration(s.lockAge))
if cmd.Err() != nil {
e = cmd.Err()
return
}
r = cmd.Val()
})
return
}
func (s *RedisTaskStore) keyFor(args ...interface{}) string {
var params = make([]string, len(args)+1)
params[0] = s.group
for i := 0; i < len(args); i++ {
params[i+1] = fmt.Sprintf("%s", args[i])
}
return strings.Join(params, "_")
}
func (s *RedisTaskStore) GetRemoteVersion() (r int64, e error) {
r = 0
s.redis.execute(func(redis *redis.Client) {
var key = s.keyFor("version")
var cmd = redis.IncrBy(key, 0)
if cmd.Err() != nil {
e = cmd.Err()
return
}
r = cmd.Val()
})
return
}
func (s *RedisTaskStore) GetAllTriggers() (r map[string]string, e error) {
s.redis.execute(func(redis *redis.Client) {
var key = s.keyFor("triggers")
var cmd = redis.HGetAll(key)
if cmd.Err() != nil {
e = cmd.Err()
return
}
r = cmd.Val()
})
return
}
func (s *RedisTaskStore) SaveAllTriggers(version int64, triggers map[string]string) (r error) {
var triggersGeneric = make(map[string]interface{})
for key, value := range triggers {
triggersGeneric[key] = value
}
s.redis.execute(func(redis *redis.Client) {
var triggersKey = s.keyFor("triggers")
var lastRunKey = s.keyFor("lastruns")
var versionKey = s.keyFor("version")
cmd := redis.HMSet(triggersKey, triggersGeneric)
if cmd.Err() != nil {
r = cmd.Err()
return
}
for _, name := range redis.HKeys(triggersKey).Val() {
if triggersGeneric[name] == nil {
cmd := redis.HDel(triggersKey, name)
if cmd.Err() != nil {
r = cmd.Err()
return
}
cmd = redis.HDel(lastRunKey, name)
if cmd.Err() != nil {
r = cmd.Err()
return
}
}
}
cmd = redis.Set(versionKey, version, 0)
r = cmd.Err()
})
return
}
func (s *RedisTaskStore) SaveLastRunTime(name string, lastRun *time.Time) (r error) {
s.redis.execute(func(redis *redis.Client) {
var key = s.keyFor("lastruns")
var raw = lastRun.Format(LayoutISO)
cmd := redis.HSet(key, name, raw)
r = cmd.Err()
})
return
}
func (s *RedisTaskStore) GetLastRunTime(name string) (r *time.Time, e error) {
s.redis.execute(func(redis *redis.Client) {
var key = s.keyFor("lastruns")
var cmd = redis.HGet(key, name)
if cmd.Err() != nil {
e = cmd.Err()
return
}
var raw = cmd.Val()
if raw != "" {
t, err := time.Parse(LayoutISO, raw)
if err != nil {
e = err
return
}
r = &t
}
})
return
}
func (s *RedisTaskStore) GetAllLastRunTimes() (r map[string]*time.Time, e error) {
s.redis.execute(func(redis *redis.Client) {
var key = s.keyFor("lastruns")
var cmd = redis.HGetAll(key)
if cmd.Err() != nil {
e = cmd.Err()
return
}
r = map[string]*time.Time{}
for name, raw := range cmd.Val() {
t, err := time.Parse(LayoutISO, raw)
if err != nil {
e = err
r = nil
return
}
r[name] = &t
}
})
return
}