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