@nearform/clinic-doctor
Programmable interface to clinic doctor
Last updated 2 years ago by kamil-mech .
Apache-2.0 · Repository · Bugs · Original npm · Tarball · package.json
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node-clinic-doctor

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Programmable interface to clinic doctor

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Supported node versions

  • Node.js 9.4.0 and above
  • Node.js 8.10.0 and above

Node.js 8.9.4 also works, however you have to listen to SIGINT and shutdown the process nicely. You can find examples in node-clinic-doctor-examples

Example

const ClinicDoctor = require('clinic-doctor')
const doctor = new ClinicDoctor()

doctor.collect(['node', './path-to-script.js'], function (err, filepath) {
  if (err) throw err

  doctor.visualize(filepath, filepath + '.html', function (err) {
    if (err) throw err
  });
})

Documentation

const ClinicDoctor = require('clinic-doctor')
const doctor = new ClinicDoctor()

doctor.collect(args, callback)

Starts a process by using:

const { spawn } = require('child_process')
spawn(args[0], ['-r', 'sampler.js'].concat(args.slice(1)))

The injected sampler will produce a file in the current working directory, with the process PID in its filename. The filepath relative to the current working directory will be the value in the callback.

stdout, stderr, and stdin will be relayed to the calling process. As will the SIGINT event.

doctor.visualize(dataFilename, outputFilename, callback)

Will consume the datafile specified by dataFilename, this datafile will be produced by the sampler using doctor.collect.

doctor.visualize will then output a standalone HTML file to outputFilename. When completed the callback will be called with no extra arguments, except a possible error.

License

Apache 2.0

Current Tags

  • 2.6.1                                ...           latest (2 years ago)

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