| /* |
| * 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 golang |
| |
| import ( |
| "sync" |
| |
| "go.uber.org/atomic" |
| ) |
| |
| type simpleThreadPool struct { |
| name string |
| tasks chan func() |
| shutdown chan any |
| waitGroup sync.WaitGroup |
| once sync.Once |
| running atomic.Bool |
| } |
| |
| func NewSimpleThreadPool(poolName string, taskSize int, threadNum int) *simpleThreadPool { |
| r := &simpleThreadPool{ |
| name: poolName, |
| tasks: make(chan func(), taskSize), |
| shutdown: make(chan any), |
| running: *atomic.NewBool(true), |
| } |
| for i := 0; i < threadNum; i++ { |
| r.waitGroup.Add(1) |
| go func() { |
| defer r.waitGroup.Done() |
| tp := r |
| for { |
| select { |
| case <-tp.shutdown: |
| sugarBaseLogger.Infof("routine pool is shutdown, name=%s", tp.name) |
| // complete all remaining tasks |
| for t := range tp.tasks { |
| t() |
| } |
| return |
| case t := <-tp.tasks: |
| if t != nil { |
| t() |
| } |
| } |
| } |
| }() |
| } |
| return r |
| } |
| |
| func (tp *simpleThreadPool) Submit(task func()) { |
| defer func() { |
| if r := recover(); r != nil { |
| // the running flag may have concurrency security, here is a fallback |
| sugarBaseLogger.Warnf("recover: simple thread pool [%s], task=%v, err=%v", tp.name, task, r) |
| } |
| }() |
| if !tp.running.Load() { |
| sugarBaseLogger.Warnf("simple thread pool [%s] is not running, task=%v", tp.name, task) |
| return |
| } |
| tp.tasks <- task |
| } |
| func (tp *simpleThreadPool) Shutdown() { |
| tp.running.Store(false) |
| tp.once.Do(func() { |
| close(tp.shutdown) |
| // do not accept other task |
| close(tp.tasks) |
| tp.waitGroup.Wait() |
| }) |
| } |