micro/store/memory/memory.go

109 lines
1.6 KiB
Go

// Package memory is a in-memory store store
package memory
import (
"sync"
"time"
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/store"
)
type memoryStore struct {
options.Options
sync.RWMutex
values map[string]*memoryRecord
}
type memoryRecord struct {
r *store.Record
c time.Time
}
func (m *memoryStore) Dump() ([]*store.Record, error) {
m.RLock()
defer m.RUnlock()
var values []*store.Record
for _, v := range m.values {
// get expiry
d := v.r.Expiry
t := time.Since(v.c)
if d > time.Duration(0) {
// expired
if t > d {
continue
}
// update expiry
v.r.Expiry -= t
v.c = time.Now()
}
values = append(values, v.r)
}
return values, nil
}
func (m *memoryStore) Read(key string) (*store.Record, error) {
m.RLock()
defer m.RUnlock()
v, ok := m.values[key]
if !ok {
return nil, store.ErrNotFound
}
// get expiry
d := v.r.Expiry
t := time.Since(v.c)
// expired
if d > time.Duration(0) {
if t > d {
return nil, store.ErrNotFound
}
// update expiry
v.r.Expiry -= t
v.c = time.Now()
}
return v.r, nil
}
func (m *memoryStore) Write(r *store.Record) error {
m.Lock()
defer m.Unlock()
// set the record
m.values[r.Key] = &memoryRecord{
r: r,
c: time.Now(),
}
return nil
}
func (m *memoryStore) Delete(key string) error {
m.Lock()
defer m.Unlock()
// delete the value
delete(m.values, key)
return nil
}
// NewStore returns a new store.Store
func NewStore(opts ...options.Option) store.Store {
options := options.NewOptions(opts...)
return &memoryStore{
Options: options,
values: make(map[string]*memoryRecord),
}
}