@heroku/kinesis
v2.0.2
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A stream implementation of Amazon's Kinesis forked from mhart/kinesis
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kinesis
A Node.js stream implementation of Amazon's Kinesis.
Allows the consumer to pump data directly into (and out of) a Kinesis stream.
This makes it trivial to setup Kinesis as a logging sink with Bunyan, or any other logging library.
For setting up a local Kinesis instance (eg for testing), check out Kinesalite.
NB: API has changed from 0.x to 1.x
Example
var fs = require('fs'),
Transform = require('stream').Transform,
kinesis = require('kinesis'),
KinesisStream = kinesis.KinesisStream
// Uses credentials from process.env by default
kinesis.listStreams({region: 'us-west-1'}, function(err, streams) {
if (err) throw err
console.log(streams)
// ["http-logs", "click-logs"]
})
var kinesisSink = kinesis.stream('http-logs')
// OR new KinesisStream('http-logs')
fs.createReadStream('http.log').pipe(kinesisSink)
var kinesisSource = kinesis.stream({name: 'click-logs', oldest: true})
// Data is retrieved as Record objects, so let's transform into Buffers
var bufferify = new Transform({objectMode: true})
bufferify._transform = function(record, encoding, cb) {
cb(null, record.Data)
}
kinesisSource.pipe(bufferify).pipe(fs.createWriteStream('click.log'))
// Create a new Kinesis stream using the raw API
kinesis.request('CreateStream', {StreamName: 'test', ShardCount: 2}, function(err) {
if (err) throw err
kinesis.request('DescribeStream', {StreamName: 'test'}, function(err, data) {
if (err) throw err
console.dir(data)
})
})
API
kinesis.stream(options)
new KinesisStream(options)
Returns a readable and writable Node.js stream for the given Kinesis stream
options
include:
region
: a string, or (deprecated) object with AWS credentials, host, port, etc (resolved from env or file by default)credentials
: an object withaccessKeyId
/secretAccessKey
properties (resolved from env, file or IAM by default)shards
: an array of shard IDs, or shard objects. If not provided, these will be fetched and cached.oldest
: if truthy, then will start at the oldest records (usingTRIM_HORIZON
) instead of the latestwriteConcurrency
: how many parallel writes to allow (1
by default)cacheSize
: number of PartitionKey-to-SequenceNumber mappings to cache (1000
by default)agent
: HTTP agent used (uses Node.js defaults otherwise)timeout
: HTTP request timeout (uses Node.js defaults otherwise)initialRetryMs
: first pause before retrying under the default policy (50
by default)maxRetries
: max number of retries under the default policy (10
by default)errorCodes
: array of Node.js error codes to retry on (['EADDRINFO', 'ETIMEDOUT', 'ECONNRESET', 'ESOCKETTIMEDOUT', 'ENOTFOUND', 'EMFILE']
by default)errorNames
: array of Kinesis exceptions to retry on (['ProvisionedThroughputExceededException', 'ThrottlingException']
by default)retryPolicy
: a function to implement a retry policy different from the default onelogger
: an object which implements alog
method, e.g.console
.
kinesis.listStreams([options], callback)
Calls the callback with an array of all stream names for the AWS account
kinesis.request(action, [data], [options], callback)
Makes a generic Kinesis request with the given action (eg, ListStreams
) and data as the body.
options
include:
region
: a string, or (deprecated) object with AWS credentials, host, port, etc (resolved from env or file by default)credentials
: an object withaccessKeyId
/secretAccessKey
properties (resolved from env, file or IAM by default)agent
: HTTP agent used (uses Node.js defaults otherwise)timeout
: HTTP request timeout (uses Node.js defaults otherwise)initialRetryMs
: first pause before retrying under the default policy (50
by default)maxRetries
: max number of retries under the default policy (10
by default)errorCodes
: array of Node.js error codes to retry on (['EADDRINFO', 'ETIMEDOUT', 'ECONNRESET', 'ESOCKETTIMEDOUT', 'ENOTFOUND', 'EMFILE']
by default)errorNames
: array of Kinesis exceptions to retry on (['ProvisionedThroughputExceededException', 'ThrottlingException']
by default)retryPolicy
: a function to implement a retry policy different from the default one