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cratejs

v0.2.13

Published

This is a node.js driver for the Crate Data Storage.

Downloads

30

Readme

CrateJS

Build Status

An extension to crate-connect, CrateJS will provide you with better methods for working with Crate.io.

Installation

npm install cratejs

Connecting

var Crate = require('cratejs');

//You can have as many db instance as you please :)
//You should probably add this part to another module and export it!
var db = module.exports = new Crate({
  host: 'localhost',
  port: 4200,
  /* Optional manual clustering
  cluster: [
      {
          host: '192.168.0.100',
          port: 4200,
      }
  ]
  */
});
  • The "db" variable will be used in the examples below.

Sample docs

db.Select(tableName)

var findBars = db.Select('fooTable')
    .columns(['id', 'name', 'bar'])
    .where({
        bar: 1
    })
    .limit(1)
    .order('id', 'asc');

findBars.run(function(err, res) {});

db.Insert(tableName)

var insertBars = db.Insert('fooTable');

//Inserting a single row
insertBars.data({
    bar: 1
}).run(function(err, res) {});

//Inserting multiple rows
insertBars.data([
    {
        bar: 1
    },
    {
        bar: 2
    },
]).run(function(err, res) {});

db.Update(tableName)

var updateBars = db.Update('fooTable')
    .where({
        bar: 1
    })
    .set({
        bar: 2
    });

updateBars.run(function(err, res) {});

db.Delete(tableName)

var deleteBars = db.Delete('fooTable')
    .wh11g10ggere({
        bar: 1
    });

deleteBars.run(function(err, res) {});

Methods inherited from crate-connect

db.Query(_queryString)

var getSomeTweets = db.Query('SELECT * FROM tweets LIMIT ?');

var howMany = 10;

getSomeTweets.execute([howMany], function(err, res) {});

db.execute(_queryString)

db.execute('SELECT * FROM tweets LIMIT ?', [10], function(err, response) {});

blob().put(table, sha1Hash, buffer, callback)

var buffer = new Buffer('sample')
var hash = crypto.createHash('sha1').update(buffer).digest('hex')

####blob().put('imagesTable', hash, buffer, function(err) {
    if(err) {
        //err.statusCode
    }
})
  • Note that if the sha1 hash is not correct, the blob wont be inserted. The sha1 hash must be calculated from the blob to be inserted.

blob().get(table, sha1Hash, callback)

db.blob().get('imagesTable', '8151325dcdbae9e0ff95f9f9658432dbedfdb209', function(err, buffer) {
    if(err) {
        //err.statusCode
    }
})

blob().check(table, sha1Hash, callback)

db.blob().check('imagesTable', '8151325dcdbae9e0ff95f9f9658432dbedfdb209', function(err) {
    if(err) {
        //err.statusCode
    }
})

blob().delete(table, sha1Hash, callback)

db.blob().check('imagesTable', '8151325dcdbae9e0ff95f9f9658432dbedfdb209', function(err) {
    if(err) {
        //err.statusCode
    }
})

TODO

  • Blob helper
  • Indexing helpers
  • Shards and replicas helper
  • Try out a binary connector

Contributors

This was created for the Crate.io data Storage.