HTTP APIs

The URL for all APIs is the same.

http://ip:port/proc

For example

http://127.0.0.1:8606/proc

In the following subsection, we use the curl command to show you the method, parameters and request body of the APIs.

Start a Task

curl -XPOST http://127.1:8606/proc -d '{"name": "task1", "cmd": "sleep 5", "type": "once", "replica": 2, "user": "guest", "deps": ["task0"]}'

To startup a task, you should send a POST request with a JSON body.

All fields of the JSON body are:

• name: the required string field that specifies the task name.
• type the required string field that specifies the type of the task. There are three types:
  • once indicates that this task will be started and run only once.
  • daemon indicates that the processes of this task will be started and run as daemon processes. Which means each one of these processes will be started up again if it exits expectedly or unexpectedly.
  • cron indicates that this is a cron job.
  • melang indicates that this is a melang coroutine task.
• cmd: the required string field that specifies the melang script file path (if type is melang) or the shell command that task processes will execute.
• replica the required integer field that specifies how many processes of this task.
• user the optional string field that specifies the running user of the task's processes.
• group the optional string field that specifies the running group of the task's processes.
• cron the optional string field that specifies the cron-format expression. This field only takes effect when type is cron. The default value of this field is * * * * *.
• interval the optional integer field that specifies the number of seconds between when the process exits and before it is started again. The default value is 3.
• deps the optional string array that specifies all tasks on which this task depends.

Restart a Task

curl -XPUT http://127.1:8606/proc?name=task1

We use a PUT request to restart a task indicated by request argument name.

If the task is running when you send this request, it will be stopped at first, and then started it up.

Stop a Task

curl -XDELETE http://127.1:8606/proc?name=task1

We use a DELETE request to stop a task indicated by request argument name.

All running processes will be terminated with SIGTERM signal.

Show Tasks

curl -XGET http://127.1:8606/proc

This API will show you all tasks and all running processes.

The response body is a JSON, its format is:

{
  "code": 200,
  "msg": "OK",
  "data": {
    "running": [
      {
        "command": "sleep 5",
        "pid": 4321,
        "alias": "task1:0"
      },
      {
        "command": "sleep 5",
        "pid": 4322,
        "alias": "task1:1"
      }
    ],
    "tasks": {
      "task1": {
        "name": "task1",
        "cmd": "sleep 5",
        "type": "once",
        "replica": 2,
        "user": "guest",
        "deps": [
          "task0"
        ],
        "interval": 3,
        "last_time": 1699958864,
        "run_flag": false,
        "start_time": 1699958864,
        "running": 0,
        "group": null
      }
    }
  }
}

The running field records the information of all current running processes.

The tasks field records all tasks regardless running or not. It is an object. The key in this object is the task name, and the value is an object records the task information.