coverage/lcov-report/lib/storage/providers/redis.js.html
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<h1>
<a href="../../../index.html">all files</a> / <a href="index.html">lib/storage/providers/</a> redis.js
</h1>
<div class='clearfix'>
<div class='fl pad1y space-right2'>
<span class="strong">92.37% </span>
<span class="quiet">Statements</span>
<span class='fraction'>121/131</span>
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<div class='fl pad1y space-right2'>
<span class="strong">75% </span>
<span class="quiet">Branches</span>
<span class='fraction'>33/44</span>
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<div class='fl pad1y space-right2'>
<span class="strong">90.91% </span>
<span class="quiet">Functions</span>
<span class='fraction'>30/33</span>
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<div class='fl pad1y space-right2'>
<span class="strong">92.37% </span>
<span class="quiet">Lines</span>
<span class='fraction'>121/131</span>
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<div class='status-line high'></div>
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">var util = require('util');
var async = require('async');
var debug = require('debug')('redis-storage');
var redis = require("redis");
var shortid = require('shortid');
var aggregator = require('../../aggregator');
var connectRedis = require('connect-redis');
var SERVICE_KEY_SUFIX = "service";
var SERVICES_KEY_SUFIX = "service";
var LATENCY_KEY_SUFIX = "latency";
var CURRENT_OUTAGE_KEY_SUFIX = "outages:current";
var OUTAGES_KEY_SUFIX = "outages";
var FAILURE_COUNT_SUFIX = "failurecount";
function StorageRedis(options) {
this.options = options || <span class="branch-1 cbranch-no" title="branch not covered" >{};</span>
this.redis = redis.createClient(this.options.port || 6379, this.options.host || '127.0.0.1');
this.redis.select(this.options.db || 0);
}
exports = module.exports = StorageRedis;
/**
* Add service
* @param service
* @param callback
*/
StorageRedis.prototype.addService = function (service, callback) {
var id = shortid.generate();
service.id = id;
service.created = +new Date();
var multi = this.redis.multi();
multi.set(SERVICE_KEY_SUFIX + ':' + id, JSON.stringify(service));
multi.sadd(SERVICES_KEY_SUFIX, id);
multi.exec(function (err) {
callback(err, id);
});
};
/**
* Update service
* @param service
* @param callback
*/
StorageRedis.prototype.updateService = function (service, callback) {
var self = this;
var multi = this.redis.multi();
multi.set(SERVICE_KEY_SUFIX + ':' + service.id, JSON.stringify(service));
multi.exec(function (err) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (err) {
<span class="cstat-no" title="statement not covered" > return callback(err);</span>
}
self.getService(service.id, callback);
});
};
/**
* Get service
* @param id
* @param callback
*/
StorageRedis.prototype.getService = function (id, callback) {
this.redis.get(SERVICE_KEY_SUFIX + ':' + id, function (err, data) {
callback(err, (!err && data) ? JSON.parse(data) : null);
});
};
/**
* Delete service
* @param id
* @param callback
*/
StorageRedis.prototype.deleteService = function (id, callback) {
var multi = this.redis.multi();
// delete service
multi.del(SERVICE_KEY_SUFIX + ':' + id);
multi.srem(SERVICES_KEY_SUFIX, id);
// delete reporting data
multi.del(id + ':' + CURRENT_OUTAGE_KEY_SUFIX);
multi.del(id + ':' + OUTAGES_KEY_SUFIX);
multi.del(id + ':' + LATENCY_KEY_SUFIX);
multi.del(id + ':' + FAILURE_COUNT_SUFIX);
multi.exec(callback);
};
/**
* Reset service data
* @param id
* @param callback
*/
StorageRedis.prototype.resetService = function (id, callback) {
var multi = this.redis.multi();
multi.del(id + ':' + CURRENT_OUTAGE_KEY_SUFIX);
multi.del(id + ':' + OUTAGES_KEY_SUFIX);
multi.del(id + ':' + LATENCY_KEY_SUFIX);
multi.del(id + ':' + FAILURE_COUNT_SUFIX);
multi.exec(callback);
};
/**
* Get all services
* @param options
* @param callback
*/
StorageRedis.prototype.getServices = function (options, callback) {
var self = this;
this.redis.smembers(SERVICES_KEY_SUFIX, function (err, ids) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (err) {
<span class="cstat-no" title="statement not covered" > return callback(err);</span>
}
var multi = self.redis.multi();
for (var i = 0; i < ids.length; i++) {
multi.get(SERVICE_KEY_SUFIX + ':' + ids[i]);
}
multi.exec(function (err, services) {
callback(err, services.map(function (service) {
return JSON.parse(service);
}));
});
});
};
/**
* Returns current outage if any for a certain service
* @param service
* @param callback
*/
StorageRedis.prototype.getCurrentOutage = function (service, callback) {
this.redis.get(service.id + ':' + CURRENT_OUTAGE_KEY_SUFIX, function (err, data) {
callback(err, err ? <span class="branch-0 cbranch-no" title="branch not covered" >null </span>: JSON.parse(data));
});
};
/**
* Records the start of an outage
* @param service
* @param callback
*/
StorageRedis.prototype.startOutage = function (service, outageData, callback) {
this.redis.set(service.id + ':' + CURRENT_OUTAGE_KEY_SUFIX, JSON.stringify(outageData), function (err) {
callback(err);
});
};
/**
* If exists, ends the current outage and saves the details into the outages collection
* @param service
* @param callback
*/
StorageRedis.prototype.archiveCurrentOutageIfExists = function (service, callback) {
var self = this;
this.getCurrentOutage(service, function (err, outage) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (err) {
<span class="cstat-no" title="statement not covered" > return callback(err);</span>
}
<span class="missing-if-branch" title="else path not taken" >E</span>if (outage) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (!outage.timestamp) {
<span class="cstat-no" title="statement not covered" > return callback('missing timestamp');</span>
}
outage.downtime = +new Date() - outage.timestamp;
var multi = self.redis.multi();
// remove current outage
multi.del(service.id + ':' + CURRENT_OUTAGE_KEY_SUFIX);
// add to outages ordered set
multi.zadd(service.id + ':' + OUTAGES_KEY_SUFIX, outage.timestamp, JSON.stringify(outage));
multi.exec(function (err) {
callback(err, outage);
});
} else {
<span class="cstat-no" title="statement not covered" > callback();</span>
}
});
};
/**
* Get outage history for a service
* @param service
* @param timestamp
* @param callback
*/
StorageRedis.prototype.getServiceOutagesSince = function (service, timestamp, callback) {
this.redis.zrevrangebyscore(service.id + ':' + OUTAGES_KEY_SUFIX, '+inf', timestamp, function (err, data) {
callback(err, err ? <span class="branch-0 cbranch-no" title="branch not covered" >null </span>: data.map(function (entry) {
return JSON.parse(entry);
}));
});
};
/**
* Records ping latency
* @param service
* @param elapsed
* @param callback
*/
StorageRedis.prototype.saveLatency = function (service, timestamp, elapsed, callback) {
//ZADD set_name score member
//member should be unique, that's why it is timestamp:elapsed
this.redis.zadd(service.id + ':' + LATENCY_KEY_SUFIX, timestamp, timestamp + ':' + elapsed, callback);
};
/**
* Get latency since certain time
* @param service
* @param timestamp defaults to Infinity
* @param callback
*/
StorageRedis.prototype.getLatencySince = function (service, timestamp, aggregatedBy, callback) {
this.redis.zrevrangebyscore(service.id + ':' + LATENCY_KEY_SUFIX, '+inf', timestamp || '-inf', 'withscores', function (err, data) {
<span class="missing-if-branch" title="if path not taken" >I</span>if (err) {
<span class="cstat-no" title="statement not covered" > return callback(err);</span>
}
if (!data.length) {
<span class="missing-if-branch" title="else path not taken" >E</span>if (aggregatedBy) {
return callback(null, {list: [], mean: 0});
}
else {
<span class="cstat-no" title="statement not covered" > return callback(null, []);</span>
}
}
var parsedData = parseLatencyDataFromZset(data);
if (aggregatedBy) {
aggregator.aggregate(parsedData.arr, aggregatedBy, function (aggregatedData) {
callback(null, {
list: aggregatedData,
mean: parsedData.mean
});
});
} else {
callback(null, parsedData);
}
});
};
StorageRedis.prototype.resetOutageFailureCount = <span class="fstat-no" title="function not covered" >function (service, cb) {</span>
<span class="cstat-no" title="statement not covered" > this.redis.del(service.id + ':' + FAILURE_COUNT_SUFIX, cb);</span>
};
StorageRedis.prototype.increaseOutageFailureCount = <span class="fstat-no" title="function not covered" >function (service, cb) {</span>
<span class="cstat-no" title="statement not covered" > this.redis.incr(service.id + ':' + FAILURE_COUNT_SUFIX, cb);</span>
};
//available on redis
StorageRedis.prototype.flush_database = function (callback) {
this.redis.flushdb(callback);
};
StorageRedis.prototype.quit = <span class="fstat-no" title="function not covered" >function () {</span>
<span class="cstat-no" title="statement not covered" > this.redis.quit();</span>
};
StorageRedis.prototype.getSessionStore = function (session, options) {
var RedisStore = connectRedis(session);
return new RedisStore({
client: this.redis
});
};
/**
* Converts ["124", "1428222697560", "123", "1428222692345"]
*
* into
*
* [{t: 1428222697560, l: 124}, {t: 1428222692345, l: 123}]
*
* @param zset
* @returns {*}
*/
function parseLatencyDataFromZset(zset) {
var list = [];
var currentObj;
var accLatency = 0;
for (var i = 0; i < zset.length; i++) {
if (i % 2 === 0) { // odd
var lat = zset[i];
//backward compatibility: only split timestamp:score if found this format
if (lat.indexOf(':') !== -1){
lat = lat.split(':')[1];
}
currentObj = {l: +lat};
<span class="missing-if-branch" title="else path not taken" >E</span>if (!isNaN(lat) && lat > 0) { // valid positive numbers
accLatency += (+lat);
}
} else {
currentObj.t = +zset[i]; // timestamp
list.push(currentObj);
}
}
return {
arr: list, // TODO: change to list
mean: Math.round(accLatency / list.length)
};
}
</pre></td></tr>
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