statful-client

Statful Client for NodeJS

Staful client for NodeJS written in Javascript. This client is intended to gather metrics and send them to Statful.

Table of Contents

• Supported Versions of NodeJS
• Installation
• Quick Start
• Examples
• Reference
• Authors
• License

Supported Versions of NodeJS

Statful client Version	Tested NodeJS versions
4.0.0	0.10, 0.12, 4 and Stable

Installation

$ npm install statful-client --save

Quick start

After installing Statful Client you are ready to use it. The quickest way is to do the following:

var Statful = require('statful-client');

// Creates an object with the configuration and pass it to the client
var config = {
    token: 'MyAppToken',
    app: 'AccountService',
    tags: { cluster: 'production' }
};
var statful = new Statful(config);

// Send a metric
statful.counter('transactions', 1);

IMPORTANT: This configuration uses the default host and port. You can learn more about configuration in Reference.

Examples

You can find here some useful usage examples of the Statful Client. In the following examples is assumed you have already installed and included Statful Client in your project.

UDP Configuration

Creates a simple UDP configuration for the client.

var Statful = require('statful-client');

var config = {
    app: 'AccountService'
    transport: 'udp',
    host: 'statful-relay.yourcompany.com',
    tags: { cluster: 'production' },
};

var statful = new Statful(config);

HTTP Configuration

Creates a simple HTTP API configuration for the client.

var Statful = require('statful-client');

var config = {
    app: 'AccountService'
    transport: 'http',
    api: {
        token: 'YOUR_TOKEN_FOR_STATFUL_API'
    }
    tags: { cluster: 'production' },
};

var statful = new Statful(config);

Logger configuration

Creates a simple client configuration and adds your favourite logger to the client, like Bunyan or Winston.

var Statful = require('statful-client');
var logger = require('your-favourite-logging-lib');

var config = {
    app: 'AccountService'
    transport: 'http',
    api: {
        token: 'YOUR_TOKEN_FOR_STATFUL_API'
    },
    tags: { cluster: 'production' },
};

var statful = new Statful(config, logger);

Defaults Configuration Per Method

Creates a configuration for the client with custom default options per method.

var Statful = require('statful-client');

var config = {
    default: {
        counter: { agg: ['avg'], aggFreq: 180 },
        gauge: { agg: ['first'], aggFreq: 180 },
        timer: { tags: { cluster: 'qa' }, agg: ['count'], aggFreq: 180 }
    },
    tags: { cluster: 'production' },
    api: {
        token: 'YOUR_TOKEN_FOR_STATFUL_API'
    },
    transport: 'http'
}

var statful = new Statful(config);

Mixed Complete Configuration

Creates a configuration defining a value for every available option.

var Statful = require('statful-client');

var config = {
    default: {
        timer: { tags: { cluster: 'qa' }, agg: ['count'], aggFreq: 180 }
    },
    dryRyn: true,
    flushInterval: 5000,
    flushSize: 50,
    transport: 'http',
    api: {
        secure: false,
        timeout: 300,
        token: 'YOUR_TOKEN_FOR_STATFUL_API'
    }
    namespace: 'application',
    tags: { cluster: 'production' }
}

var statful = new Statful(config);

Add metrics

Creates a simple client configuration and use it to send some metrics.

var Statful = require('statful-client');

var config = {
    app: 'AccountService'
    transport: 'udp',
    host: 'statful-relay.yourcompany.com',
    tags: { cluster: 'production' },
};

var statful = new Statful(config);

// Send three different metrics (gauge, timer and a counter)
statful.gauge('testGauge', 10);
statful.timer('testTimer', 100);
statful.counter('testCounter', 1, { agg: ['first'], aggFreq: 60, namespace: 'sandbox' });

// Metric to be sent with tags
statful.counter('testCounter', 1, {tags: {host, 'localhost', status: 'SUCCESS'}});

Reference

Detailed reference if you want to take full advantage from Statful.

Global configuration

The custom options that can be set on config param are detailed below.

Option	Description	Type	Default	Required
app	Defines the application global name. If specified sets a global tag app=setValue.	string	none	NO
default	Object to set methods options.	object	{}	NO
api	Defined API configurations.	object	none	NO
dryRun	Defines if metrics should be output to the logger instead of being send.	boolean	false	NO
flushInterval	Defines the periodicity of buffer flushes in miliseconds.	number	10000	NO
flushSize	Defines the maximum buffer size before performing a flush.	number	10	NO
namespace	Defines the global namespace.	string	application	NO
sampleRate	Defines the rate sampling. Should be a number between [1, 100].	number	100	NO
tags	Defines the global tags.	object	{}	NO
transport	Defines the transport layer to be used to send metrics. Valid Transports: udp, http	string	none	YES
host	Defines the host name to where the metrics should be sent. Can also be set inside api.	string	127.0.0.1	NO
port	Defines the port. Can also be set inside api.	string	2013	NO
secure	Enable or disable https protocol. Must be set inside api.	boolean	true	NO
token	Defines the token to be used. Must be set inside api.	string	none	NO
timeout	Defines the timeout for the transport layers. Must be set inside api.	number	2000	NO

Methods

- staful.counter('myCounter', 1, {agg: ['sum']});
- staful.gauge('myGauge', 10, { tags: { host: 'localhost' } });
- staful.timer('myCounter', 200, {namespace: 'sandbox'});

These methods receive a metric name and a metric value as arguments and send a counter/gauge/timer metric. If the options parameter is omitted, the default values are used. Read the methods options reference bellow to get more information about the default values.

Option	Description	Type	Default for Counter	Default for Gauge	Default for Timer
agg	Defines the aggregations to be executed. These aggregations are merged with the ones configured globally, including method defaults. Valid Aggregations: avg, count, sum, first, last, p90, p95, min, max	array	['avg', 'p90']	last]	['avg', 'p90', 'count']
aggFreq	Defines the aggregation frequency in seconds. It overrides the global aggregation frequency configuration. Valid Aggregation Frequencies: 10, 30, 60, 20, 180, 300	number	10	10	10
namespace	Defines the namespace of the metric. It overrides the global namespace configuration.	string	application	application	application
tags	Defines the tags of the metric. These tags are merged with the ones configured globally, including method defaults.	object	{}	{}	{ unit: 'ms' }

Authors

Mindera - Software Craft

License

Statful NodeJS Client is available under the MIT license. See the LICENSE file for more information.