worker-kit v1.0.17

worker-kit

API

WorkerManager(numberOfWorkers = 10)

• WorkerManager#hasFreeWorkers()
• WorkerManager#_getFreeWorker()
• WorkerManager#publish(job)
• WorkerManager#_processJobs()
• WorkerManager#_run(worker, job)

Worker()

• Worker#getId()
• Worker#isFree()
• Worker#run(job)

events

• finished (worker, job) => {}

Job(payload, [config, data])

• Job#getId()
• Job#overwriteId()
• Job#getPayload()
• Job#overwritePayload(payload)
• Job#getConfig(config)
• Job#getConfigs()
• Job#setConfig(config, value)
• Job#setConfigs(object)
• Job#getError()
• Job#_setError()
• Job#getData()
• Job#getStore()
• Job#getExecTime()
• Job#getErrorBucket()
• Job#getJobBucket()
• Job#getNumberOfExecutions()
• Job#getResults()
• Job#getStatus()
• Job#_setStatus()
• Job#requeue()
• Job#drop()
• Job#finish()
• Job#error(err)
• Job#shouldExecAgain()
• Job#_setup()
• Job#_do()
• Job#exec()

statuses

• unfinished
• finished
• requeue
• dropped
• setup_error
• job_error
• timeout_error

events

• executed (job) => {}
• finished (job) => {}

const workerKit = require('worker-kit');
const AmqpTransporter = workerKit.AmqpTransporter;
const WorkerManager = workerKit.WorkerManager;
const Worker = workerKit.Worker;
const Job = workerKit.Job;

class JobExample extends Job {
  /**
   * Return job configs.
   */
  setup() {
    this.setConfig('timeout', 10000);
    this.setConfig('maxRepeats', 0);
    this.setConfig('dropOnError', false);
    this.setConfig('dropOnTimeout', false);
  }

  /**
   * Run job.
   */
  async do() {
    console.log(`doing job ${this.getId()} ${JSON.stringify(this.getPayload())}`);
  }
}

async function main() {
    const workerManager = new WorkerManager(10);
    const payload = { hello: 'world' };
    const job = new JobExample(payload);
    job.once('finished', job => console.log('JOB FINISHED', job.getId()));
    workerManager.publish(job);
    console.log(`pushed job`);
}

main().catch(console.log);

Amqp Transporter Config

const configs = [
  {
    name: 'Test',
    type: 'direct',
    // options: {
    //   durable: true, // resist restarts
    //   internal: false, // messages can not be published directly to exchange
    //   autoDelete: true, // destroy exchange when number of bindings drop to 0
    //   // exchange to send messages if this exchange cant route them to any queue
    //   alternateExchange: '',
    //   arguments: {},
    // },
    routes: [
      {
        patterns: ['routeA'],
        queues: [
          {
            name: 'q1',
            // options: {
            //   exclusive: false, // scope queue to connection
            //   durable: true, // resist restarts
            //   autoDelete: false, // delete queue when there are 0 consumers
            //   arguments: { // arguments for extensions
            //     'x-message-ttl': 0, // 0 <= n < 2^32
            //     'x-expires': 0, // 0 < n < 2^32
            //     // discarded messages arrive here (expired, rejected or nacked messages)
            //     'x-dead-letter-exchange': '',
            //     'x-dead-letter-routing-key': '', // routing key if there is one
            //     // maximum of messages queue can hold (old ones will get discarded)
            //     'x-max-length': 0,
            //     'x-max-priority': 0, // makes the queue a priority queue.
            //   },
            // },
          },
        ],
        args: {},
      },
    ],
  },
];