limited-process

Safely run code in separate process. Limit child process requiring module.

npm install --save limited-process

class constructor

constructor(fileName[, jsCode])

fileName : Js file`s absolute path. If you provide jsCode parameter, the fileName will be this code`s alias, use for stack trace.

jsCode : A javascript code string, it will be run in other process.

class properties

• fileName: jsCode correspond filename, use for stack trace.

• jsCode: A javascript code string, it will be run in other process.

• requireList: A module name array, in child process all those module names will be required and exposed at global.lp.requireList.

• service A object consist of function, child process can use global.lp.invoke to invoke those functions. Note than, those function can not return a function. If you need running a async task, you can return a promise object.

• cpuUsage Child process cpu usage. If child process is not running, this property will be undefined.

• memoryUsage Child process memory usage. If child process is not running, this property will be undefined.

• errors: A array consist of child process uncaught exception.

• isRunning: Indicates whether the child process is running.

• startTime: Child process start time.

• invoke: you can use this to invoke child process global.lp.service. Like this, invoke(functionName[,...args]) or invoke.functionName([...args]).

• pid, stderr, stdin, stdout: Same to child_process module

class methods

• async start(option = {debug: false}): Start child process.
  • debug: Is using --inspect flag to run child process. If debug is true, start() will return a debug net address string.
• setTimeout(delay) How much time to turn off the child process
• async kill([signal]) The child.kill() methods sends a signal to the child process. If no argument is given, the process will be sent the 'SIGTERM' signal. Before child process close, child process`s global.lp.onClose will be triggered.

class events

• childProcessError: When child process generate a uncaught exception.
• close, error, exit: Same to child_process module