DynamoDb Driver for Node.js
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examples
lib
test
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Makefile
ReadMe.md
index.js
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ReadMe.md

Basics

A DynamoDB driver for Node.js, with:

  • Syntactic sweeteners/mapping to handle Amazon DynamoDB's JSON format in NodeJS
  • Efficient and transparent authentication and authentication refresh using Amazon STS
  • Currently in production with more than 80 write/s, 60 read/s

Discussion Group: http://groups.google.com/group/node-dynamodb

Supports the following operations:

CreateTable
ListTables
DescribeTable
DeleteTable
UpdateTable

GetItem
PutItem
DeleteItem
UpdateItem
Query
Scan

Any contribution is welcome! There's still a lot of work to be done!

Usage

var ddb = require('dynamodb').ddb({ accessKeyId: '',
                                    secretAccessKey: '' });

/* CreateTable */                                   

ddb.createTable('foo', { hash: ['id', ddb.schemaTypes().string],
                         range: ['time', ddb.schemaTypes().number] },
                {read: 10, write: 10}, function(err, details) {});
// res: { "CreationDateTime": 1.310506263362E9,
//        "KeySchema": { "HashKeyElement": { "AttributeName": "AttributeName1",
//                                           "AttributeType": "S"},
//                       "RangeKeyElement": { "AttributeName": "AttributeName2",
//                                            "AttributeType": "N"} },
//        "ProvisionedThroughput":{ "ReadCapacityUnits": 5,
//                                  "WriteCapacityUnits": 10 },
//        "TableName":"Table1",
//        "TableStatus":"CREATING" }

/* ListTables */                                   

ddb.listTables({}, function(err, res) {});
// res: { LastEvaluatedTableName: 'bar',
          TableNames: ['test','foo','bar'] }

/* DescribeTable */                                   

ddb.describeTable('a-table', function(err, res) {});
// res: { ... }

// flat [string, number, string array or number array] based json object
var item = { score: 304,
             date: (new Date).getTime(),
             sha: '3d2d6963',
             usr: 'spolu',
             lng: ['node', 'c++'] };

/* PutItem */                                   

ddb.putItem('a-table', item, {}, function(err, res, cap) {});

ddb.getItem('a-table', '3d2d6963', null, {}, function(err, res, cap) {});
// res: { score: 304,
//        date: 123012398234,
//        sha: '3d2d6963',
//        usr: 'spolu',
//        lng: ['node', 'c++'] };

/* DeleteItem */          

ddb.deleteItem('a-table', 'sha', null, {}, function(err, res, cap) {});

/* UpdateItem */          

ddb.updateItem('a-table', '3d2d6963', null, { 'usr': { value: 'smthg' } }, {},
               function(err, res, cap) {});

ddb.consumedCapacity();

/* Query */          

ddb.query('test', '3d2d6963', function(err, res, cap) {...});
// res: { count: 23,
//        lastEvaluatedKey: { hash: '3d2d6963' },
//        items: [...] };

/* Scan */          

ddb.scan('test', {}, function(err, res) {
    if(err) {
      console.log(err);
    } else {
      console.log(res);
    }
 });
// res: { count: 23,
//        lastEvaluatedKey: { hash: '3d2d6963' },
//        items: [...] };

More complete usage can be found in the examples directory

Run the Tests

Put in your environment:

export DYNAMODB_ACCESSKEYID=YOURACCESSKEYID
export DYNAMODB_SECRETACCESSKEY=YOURSECRETKEYID
export DYNAMODB_TEST_TABLE=test

Make sure you have a test table created and available with sha as a hash key (string), then run:

make test

Contributors

@karlseguin (Karl Seguin)
@imekinox (Juan Carlos del Valle)
@phstc (Pablo Cantero)
@cstivers78 (Chris Stivers)
@garo (Juho Mäkinen)
@paultax