mongo-subs/lib/src/publisher.js

Mongo subscription library

/*
 * Copyright 2015 mtap technologies
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

'use strict';
var MongoSubs = require('./mongosubs');
var MongoReader = require('./MongoReader');
var DetailedOplog = require('./DetailedOplog');
var OplogReader = require('./OplogReader');
var MongoContext = require('./MongoContext');
var Publisher = {};

var getMongoContext = function(mongouri) {
  return MongoContext.connect(mongouri);
};

var getMongoSubs = function(mongoContext, metaInfo) {
  var oplog = OplogReader.create(mongoContext, metaInfo).tail();
  return new MongoSubs(new DetailedOplog(oplog, new MongoReader(mongoContext)));
};

Publisher.createWith = function(mongouri, metaInfo) {
  return getMongoSubs(getMongoContext(mongouri), metaInfo);
};

module.exports = Publisher;