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/*!
* Module dependencies.
*/
var EventEmitter = require('events').EventEmitter;
var STATES = require('./connectionstate');
/**
* Abstract Collection constructor
*
* This is the base class that drivers inherit from and implement.
*
* @param {String} name name of the collection
* @param {Connection} conn A MongooseConnection instance
* @param {Object} opts optional collection options
* @api public
*/
function Collection(name, conn, opts) {
if (opts === void 0) {
opts = {};
}
if (opts.capped === void 0) {
opts.capped = {};
}
opts.bufferCommands = undefined === opts.bufferCommands
? true
: opts.bufferCommands;
if (typeof opts.capped === 'number') {
opts.capped = {size: opts.capped};
}
this.opts = opts;
this.name = name;
this.collectionName = name;
this.conn = conn;
this.queue = [];
this.buffer = this.opts.bufferCommands;
this.emitter = new EventEmitter();
if (STATES.connected === this.conn.readyState) {
this.onOpen();
}
}
/**
* The collection name
*
* @api public
* @property name
*/
Collection.prototype.name;
/**
* The collection name
*
* @api public
* @property collectionName
*/
Collection.prototype.collectionName;
/**
* The Connection instance
*
* @api public
* @property conn
*/
Collection.prototype.conn;
/**
* Called when the database connects
*
* @api private
*/
Collection.prototype.onOpen = function() {
this.buffer = false;
this.doQueue();
};
/**
* Called when the database disconnects
*
* @api private
*/
Collection.prototype.onClose = function() {
if (this.opts.bufferCommands) {
this.buffer = true;
}
};
/**
* Queues a method for later execution when its
* database connection opens.
*
* @param {String} name name of the method to queue
* @param {Array} args arguments to pass to the method when executed
* @api private
*/
Collection.prototype.addQueue = function(name, args) {
this.queue.push([name, args]);
return this;
};
/**
* Executes all queued methods and clears the queue.
*
* @api private
*/
Collection.prototype.doQueue = function() {
for (var i = 0, l = this.queue.length; i < l; i++) {
if (typeof this.queue[i][0] === 'function') {
this.queue[i][0].apply(this, this.queue[i][1]);
} else {
this[this.queue[i][0]].apply(this, this.queue[i][1]);
}
}
this.queue = [];
var _this = this;
process.nextTick(function() {
_this.emitter.emit('queue');
});
return this;
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.ensureIndex = function() {
throw new Error('Collection#ensureIndex unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.findAndModify = function() {
throw new Error('Collection#findAndModify unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.findOne = function() {
throw new Error('Collection#findOne unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.find = function() {
throw new Error('Collection#find unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.insert = function() {
throw new Error('Collection#insert unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.save = function() {
throw new Error('Collection#save unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.update = function() {
throw new Error('Collection#update unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.getIndexes = function() {
throw new Error('Collection#getIndexes unimplemented by driver');
};
/**
* Abstract method that drivers must implement.
*/
Collection.prototype.mapReduce = function() {
throw new Error('Collection#mapReduce unimplemented by driver');
};
/*!
* Module exports.
*/
module.exports = Collection;
|
