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client.go
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client.go
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package executor
import (
jober "github.com/hamster-shared/aline-engine/job"
"github.com/hamster-shared/aline-engine/logger"
"github.com/hamster-shared/aline-engine/model"
)
func NewExecutorClient() *ExecutorClient {
statusChan := make(chan model.StatusChangeMessage, 100)
return &ExecutorClient{
executor: &Executor{
cancelMap: make(map[string]func()),
StatusChan: statusChan,
},
QueueChan: make(chan *model.QueueMessage, 100),
}
}
type ExecutorClient struct {
executor *Executor
QueueChan chan *model.QueueMessage
}
func (c *ExecutorClient) Main() {
// 持续监听任务队列
go c.handleJobQueue()
}
func (c *ExecutorClient) GetStatusChangeChan() chan model.StatusChangeMessage {
return c.executor.StatusChan
}
func (c *ExecutorClient) GetJobStatus(jobName string, jobID int) (model.Status, error) {
return c.executor.GetJobStatus(jobName, jobID)
}
func (c *ExecutorClient) handleJobQueue() {
for {
// 监听队列
queueMessage, ok := <-c.QueueChan
if !ok {
logger.Error("executor client channel closed")
return
}
logger.Tracef("executor client receive message: %v", queueMessage)
// 如果收到了停止任务的消息,那么就取消任务,结束本次循环
if queueMessage.Command == model.Command_Stop {
err := c.executor.Cancel(queueMessage.JobName, queueMessage.JobId)
if err != nil {
logger.Errorf("cancel job error: %v", err)
}
continue
}
// 否则,保存并执行 job
err := jober.SaveJob(queueMessage.JobName, queueMessage.JobContent)
if err != nil {
logger.Errorf("save job error: %v", err)
continue
}
jobName := queueMessage.JobName
jobId := queueMessage.JobId
job, err := jober.GetJobObject(jobName)
if err != nil {
logger.Errorf("get job error: %v", err)
continue
}
//6. 异步执行 pipeline
go func() {
err := c.executor.Execute(jobId, job)
if err != nil {
logger.Errorf("execute job error: %v", err)
// 在这里再次同步一次状态
c.executor.StatusChan <- model.NewStatusChangeMsg(jobName, jobId, model.STATUS_FAIL)
}
}()
}
}