Rainbond/builder/discover/discover.go
2020-07-18 15:50:18 +08:00

156 lines
4.5 KiB
Go

// Copyright (C) 2014-2018 Goodrain Co., Ltd.
// RAINBOND, Application Management Platform
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version. For any non-GPL usage of Rainbond,
// one or multiple Commercial Licenses authorized by Goodrain Co., Ltd.
// must be obtained first.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package discover
import (
"context"
"fmt"
"os"
"strings"
"time"
"github.com/Sirupsen/logrus"
"github.com/goodrain/rainbond/builder/exector"
"github.com/goodrain/rainbond/cmd/builder/option"
"github.com/goodrain/rainbond/mq/api/grpc/pb"
"github.com/goodrain/rainbond/mq/client"
grpc1 "google.golang.org/grpc"
)
//WTOPIC is builder
const WTOPIC string = "builder"
var healthStatus = make(map[string]string, 1)
//TaskManager task
type TaskManager struct {
ctx, discoverCtx context.Context
cancel, discoverCancel context.CancelFunc
config option.Config
client client.MQClient
exec exector.Manager
callbackChan chan *pb.TaskMessage
}
//NewTaskManager return *TaskManager
func NewTaskManager(c option.Config, client client.MQClient, exec exector.Manager) *TaskManager {
ctx, cancel := context.WithCancel(context.Background())
discoverCtx, discoverCancel := context.WithCancel(ctx)
healthStatus["status"] = "health"
healthStatus["info"] = "builder service health"
callbackChan := make(chan *pb.TaskMessage, 100)
taskManager := &TaskManager{
discoverCtx: discoverCtx,
discoverCancel: discoverCancel,
ctx: ctx,
cancel: cancel,
config: c,
client: client,
exec: exec,
callbackChan: callbackChan,
}
exec.SetReturnTaskChan(taskManager.callback)
return taskManager
}
//Start 启动
func (t *TaskManager) Start(errChan chan error) error {
go t.Do(errChan)
logrus.Info("start discover success.")
return nil
}
func (t *TaskManager) callback(task *pb.TaskMessage) {
ctx, cancel := context.WithCancel(t.ctx)
defer cancel()
_, err := t.client.Enqueue(ctx, &pb.EnqueueRequest{
Topic: client.BuilderTopic,
Message: task,
})
if err != nil {
logrus.Errorf("callback task to mq failure %s", err.Error())
}
logrus.Infof("The build controller returns an indigestible task(%s) to the messaging system", task.TaskId)
}
//Do do
func (t *TaskManager) Do(errChan chan error) {
hostName, _ := os.Hostname()
for {
select {
case <-t.discoverCtx.Done():
return
default:
ctx, cancel := context.WithCancel(t.discoverCtx)
data, err := t.client.Dequeue(ctx, &pb.DequeueRequest{Topic: t.config.Topic, ClientHost: hostName + "-builder"})
cancel()
if err != nil {
if grpc1.ErrorDesc(err) == context.DeadlineExceeded.Error() {
logrus.Warn(err.Error())
continue
}
if grpc1.ErrorDesc(err) == "context canceled" {
logrus.Warn("grpc dequeue context canceled")
healthStatus["status"] = "unusual"
healthStatus["info"] = "grpc dequeue context canceled"
return
}
if grpc1.ErrorDesc(err) == "context timeout" {
logrus.Warn(err.Error())
continue
}
if strings.Contains(err.Error(), "there is no connection available") {
errChan <- fmt.Errorf("message dequeue failure %s", err.Error())
return
}
logrus.Errorf("message dequeue failure %s, will retry", err.Error())
time.Sleep(time.Second * 2)
continue
}
err = t.exec.AddTask(data)
if err != nil {
t.callbackChan <- data
logrus.Error("add task error:", err.Error())
}
}
}
}
//Stop 停止
func (t *TaskManager) Stop() error {
t.discoverCancel()
if err := t.exec.Stop(); err != nil {
logrus.Errorf("stop task exec manager failure %s", err.Error())
}
for len(t.callbackChan) > 0 {
logrus.Infof("waiting callback chan empty")
time.Sleep(time.Second * 2)
}
logrus.Info("discover manager is stoping.")
t.cancel()
if t.client != nil {
t.client.Close()
}
return nil
}
// HealthCheck 组件的健康检查
func HealthCheck() map[string]string {
return healthStatus
}