spring 批量提供作业执行状态和步骤信息

Question

I have an application where clients send HTTP requests which get translated into Spring batch job params and trigger a job. I generate a correlationId for the response along with the result of the Job Execution.

At this point I have no way to get the Job_Execution_Id of the job that run.

The way to grab it is If I query BATCH_JOB_EXECUTION_PARAM table which has the correlationId as key/value, so I query with condition:

where KEY_NAME='correlationId' AND STRING_VAL='12345'

This gives me the JOB_EXECUTION_ID .

From here I want to provide my clients with the full detail of the job that run/or is running in progress including the details of the current step and its status. So json payload should look like something like this:

{
  "correlationId": "2ae16a63-7e91-4e37-942a-cf7f66117014",
  "jobDetails": {
    "id": 1,
    "jobId": 1,
    "jobName": "BLA BLA",
    "startTime": "2018-12-23T18:19:13.185",
    "endTime": "2018-12-23T18:19:13.223",
    "exitCode": "COMPLETED",
    "exitDescription": "",
    "status": "COMPLETED",
    "exceptions": [],
    "currentStep": "copyingAFile",
    "currentStepStatus": "RUNNING"
  },
  "_links": {
    "self": {
      "href": "http://localhost:8080/status/2ae16a63-7e91-4e37-942a-cf7f66117014"
    }
  }
}

I am aware there are some dao classes within spring batch for jobexection and stepexecution . What I'd like to know is if there a way I can grab the details of the job execution and the current step execution in one hit with a custom query or a dao method that already exists within the spring batch framework and plug into my response? All this from a simple correlationId that my client calls with in an endpoint GET /status/{correlationId}

This link has given me some knowledge but is querying with job execution id which my client will not have and also there is nothing about currentStep and it's status

I am not driving all this by job execution id because my jobs can be fired asynchronously for which I need to respond immediately with correlationId.

Answer 1

I believe you don't need that correlationId . If you set an asynchronous task executor on the job launcher, the job launcher will return immediately a jobExecution with an id that you can return to the client, see Running Jobs from within a Web Container .

Now with a job execution Id you get from GET /status/{jobExecutionId} , you can use a JobExplorer#getJobExecution to get the JobExecution and its step executions (using JobExecution#getStepExecutions() , and find out which step is currently running with stepExecution.getStatus().isRunning() . With that, you should be able to return your response.