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redis.js
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redis.js
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/*
* Module dependencies
*/
var _ = require('underscore');
var async = require('async');
var assert = require('assert');
var redis = require("redis");
/*
* Register sync methods
*/
var sync = module.exports = function (method, model, opts) {
if (method === 'create' || method === 'update') sync.save(model, opts);
};
/* Check if model has an id */
sync.checkId = function (data, done) {
done(!data.id? 'Model has no id' : null);
};
/* Check if model has a type */
sync.checkType = function (data, done) {
done(!data.id? 'Model has no type' : null);
};
/* Save all data keys on Redis */
sync.saveKeys = function (data, done) {
var client = redis.createClient();
async.each(
_.keys(data),
function saveKey(key, nextKey) {
var hashKey = data.type + ':' + data.id;
client.hset(hashKey, key, data[key], nextKey);
},
function endClient(err) {
client.end();
done(err);
}
);
};
/* Forward error or success when process end */
sync.end = function (opts, err) {
if (err) {
opts.error(new Error(err));
} else {
opts.success();
}
};
/* Save model */
sync.save = function (model, opts) {
var data = model.flatten();
async.series([
_.bind(sync.checkId, sync, data),
_.bind(sync.checkType, sync, data),
_.bind(sync.saveKeys, sync, data),
], _.bind(sync.end, sync, opts));
};