复制项目

pkg/localcache/lru/lru_slot.go

@@ -0,0 +1,82 @@
+// Copyright © 2024 OpenIM. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package lru
+
+func NewSlotLRU[K comparable, V any](slotNum int, hash func(K) uint64, create func() LRU[K, V]) LRU[K, V] {
+	x := &slotLRU[K, V]{
+		n:     uint64(slotNum),
+		slots: make([]LRU[K, V], slotNum),
+		hash:  hash,
+	}
+	for i := 0; i < slotNum; i++ {
+		x.slots[i] = create()
+	}
+	return x
+}
+
+type slotLRU[K comparable, V any] struct {
+	n     uint64
+	slots []LRU[K, V]
+	hash  func(k K) uint64
+}
+
+func (x *slotLRU[K, V]) GetBatch(keys []K, fetch func(keys []K) (map[K]V, error)) (map[K]V, error) {
+	var (
+		slotKeys = make(map[uint64][]K)
+		kVs       = make(map[K]V)
+	)
+
+	for _, k := range keys {
+		index := x.getIndex(k)
+		slotKeys[index] = append(slotKeys[index], k)
+	}
+
+	for k, v := range slotKeys {
+		batches, err := x.slots[k].GetBatch(v, fetch)
+		if err != nil {
+			return nil, err
+		}
+		for key, value := range batches {
+			kVs[key] = value
+		}
+	}
+	return kVs, nil
+}
+
+func (x *slotLRU[K, V]) getIndex(k K) uint64 {
+	return x.hash(k) % x.n
+}
+
+func (x *slotLRU[K, V]) Get(key K, fetch func() (V, error)) (V, error) {
+	return x.slots[x.getIndex(key)].Get(key, fetch)
+}
+
+func (x *slotLRU[K, V]) Set(key K, value V) {
+	x.slots[x.getIndex(key)].Set(key, value)
+}
+
+func (x *slotLRU[K, V]) SetHas(key K, value V) bool {
+	return x.slots[x.getIndex(key)].SetHas(key, value)
+}
+
+func (x *slotLRU[K, V]) Del(key K) bool {
+	return x.slots[x.getIndex(key)].Del(key)
+}
+
+func (x *slotLRU[K, V]) Stop() {
+	for _, slot := range x.slots {
+		slot.Stop()
+	}
+}