| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 tps |
| |
| import ( |
| "sync" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go/common/extension" |
| "github.com/apache/dubbo-go/filter" |
| ) |
| |
| func init() { |
| extension.SetTpsLimitStrategy("threadSafeFixedWindow", &threadSafeFixedWindowStrategyCreator{ |
| fixedWindowStrategyCreator: &fixedWindowStrategyCreator{}, |
| }) |
| } |
| |
| // ThreadSafeFixedWindowTpsLimitStrategyImpl is the thread-safe implementation. |
| // It's also a thread-safe decorator of FixedWindowTpsLimitStrategyImpl |
| /** |
| * "UserProvider": |
| * registry: "hangzhouzk" |
| * protocol : "dubbo" |
| * interface : "com.ikurento.user.UserProvider" |
| * ... # other configuration |
| * tps.limiter: "method-service" # the name of limiter |
| * tps.limit.strategy: "threadSafeFixedWindow" # service-level |
| * methods: |
| * - name: "GetUser" |
| * tps.interval: 3000 |
| * tps.limit.strategy: "threadSafeFixedWindow" # method-level |
| */ |
| type ThreadSafeFixedWindowTpsLimitStrategyImpl struct { |
| mutex *sync.Mutex |
| fixedWindow *FixedWindowTpsLimitStrategyImpl |
| } |
| |
| // IsAllowable implements thread-safe then run the FixedWindowTpsLimitStrategy |
| func (impl *ThreadSafeFixedWindowTpsLimitStrategyImpl) IsAllowable() bool { |
| impl.mutex.Lock() |
| defer impl.mutex.Unlock() |
| return impl.fixedWindow.IsAllowable() |
| } |
| |
| type threadSafeFixedWindowStrategyCreator struct { |
| fixedWindowStrategyCreator *fixedWindowStrategyCreator |
| } |
| |
| // Create returns ThreadSafeFixedWindowTpsLimitStrategyImpl instance |
| func (creator *threadSafeFixedWindowStrategyCreator) Create(rate int, interval int) filter.TpsLimitStrategy { |
| fixedWindowStrategy := creator.fixedWindowStrategyCreator.Create(rate, interval).(*FixedWindowTpsLimitStrategyImpl) |
| return &ThreadSafeFixedWindowTpsLimitStrategyImpl{ |
| fixedWindow: fixedWindowStrategy, |
| mutex: &sync.Mutex{}, |
| } |
| } |