openhim-core/lib/polling.js

The OpenHIM core application that provides logging and routing of http requests

var Channel, Channels, Q, authorisation, config, logger, removePollingChannel, request, utils;

Channels = require('./model/channels');

Channel = Channels.Channel;

request = require('request');

config = require('./config/config');

config.polling = config.get('polling');

logger = require('winston');

Q = require('q');

authorisation = require('./middleware/authorisation');

utils = require('./utils');

exports.agendaGlobal = null;

exports.registerPollingChannel = function(channel, callback) {
  logger.info("Registering polling channel: " + channel._id);
  if (!channel.pollingSchedule) {
    return callback(new Error('no polling schedule set on this channel'));
  }
  return exports.agendaGlobal.cancel({
    name: "polling-job-" + channel._id
  }, function(err) {
    if (err) {
      return callback(err);
    }
    exports.agendaGlobal.define("polling-job-" + channel._id, function(job, done) {
      var options;
      logger.info("Polling channel " + channel._id);
      options = {
        url: "http://" + config.polling.host + ":" + config.polling.pollingPort + "/trigger",
        headers: {
          'channel-id': channel._id,
          'X-OpenHIM-LastRunAt': job.attrs.lastRunAt
        }
      };
      return request(options, function() {
        return done();
      });
    });
    exports.agendaGlobal.every(channel.pollingSchedule, "polling-job-" + channel._id, null, {
      timezone: utils.serverTimezone()
    });
    return callback(null);
  });
};

exports.removePollingChannel = removePollingChannel = function(channel, callback) {
  logger.info("Removing polling schedule for channel: " + channel._id);
  return exports.agendaGlobal.cancel({
    name: "polling-job-" + channel._id
  }, function(err) {
    if (err) {
      return callback(err);
    }
    return callback(null);
  });
};

exports.setupAgenda = function(agenda, callback) {
  var registerPollingChannelPromise;
  logger.info("Starting polling server...");
  registerPollingChannelPromise = Q.denodeify(exports.registerPollingChannel);
  exports.agendaGlobal = agenda;
  return Channel.find({
    type: 'polling'
  }, function(err, channels) {
    var channel, i, len, promises;
    if (err) {
      return err;
    }
    promises = [];
    for (i = 0, len = channels.length; i < len; i++) {
      channel = channels[i];
      if (Channels.isChannelEnabled(channel)) {
        promises.push(registerPollingChannelPromise(channel));
      }
    }
    return (Q.all(promises)).done(callback);
  });
};

//# sourceMappingURL=polling.js.map