| /* |
| * 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 task |
| |
| import ( |
| "errors" |
| "github.com/apache/servicecomb-service-center/pkg/gopool" |
| "github.com/apache/servicecomb-service-center/pkg/queue" |
| "golang.org/x/net/context" |
| ) |
| |
| type Executor struct { |
| pool *gopool.Pool |
| tasks *queue.UniQueue |
| latestTask Task |
| } |
| |
| func (s *Executor) AddTask(task Task) (err error) { |
| if task == nil { |
| return errors.New("invalid parameters") |
| } |
| |
| err = s.tasks.Put(task) |
| if err != nil { |
| return |
| } |
| return s.latestTask.Err() |
| } |
| |
| func (s *Executor) Execute() { |
| select { |
| case task, ok := <-s.tasks.Chan(): |
| if !ok { |
| return |
| } |
| s.pool.Do(func(ctx context.Context) { |
| at := task.(Task) |
| at.Do(ctx) |
| s.latestTask = at |
| }) |
| default: |
| } |
| } |
| |
| func (s *Executor) Close() { |
| s.tasks.Close() |
| } |
| |
| func NewExecutor(pool *gopool.Pool, task Task) *Executor { |
| return &Executor{ |
| pool: pool, |
| tasks: queue.NewUniQueue(), |
| latestTask: task, |
| } |
| } |