node-cassandra-control

node.js driver for cassandra database

npm install node-cassandra-control
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Introduction

This is a driver that control Cassandra database.

Installation

$ npm install node-cassandra-control

Usage

Setting server

You can setup your server in front of your require statement

   var config_obj = {
      "host": "your_database_server",
      "port": "database_port",
      "keyspace": "cassandra_keyspace"
   }

For example:

   var config_obj = {
      "host": "127.0.0.1",
      "port": 9160,
      "keyspace": "clubond_test"
   }

see some example in example file

Require module

Require node-cassandra-control and put your config_obj in the parameter.

    var node_control = require('../node-cassandra-control')(config_obj);

Methods

Here are some methods that you can insert, get, delete your data by a very easy way.

getAllKeys

Simply get all from a column family

for example:

    params = {
      CF: "user"
    }
    node_control.getAllKeys(params, function (err, rows) {
      if(err)
        throw err;
      console.log(rows);
    });

In this example it will get all the Keys from user column family.

getKeysByIdx

Get keys by second index

parameter and callback type

    * @param {Object} params= { CF, idx_name, idx_id}
    * @param {Function} callback
    *
    * @callback {object} rows

for example:

    var params = {
        CF: "user",
        idx_name: "account",
        idx_id: "info@fougood.com"
    }
    node_control.getKeysByIdx(params, function (err, rows) {
      if(err)
        throw err;
      console.log(rows);
    });

In this example it will get data from column family user, second index name account and second index id info@fougood.com

chkKeyExist

Check if the key exist

parameter and callback type

    /**
    *
    * @method chkKeyExist
    *
    * @param {Object} params= { CF, key_id}
    * @param {Function} callback
    *
    * @callback {object} rows
    * @callback {Boolean} false if target KEY_ID not exist
    */

chkKeyExistByIdx

Check if the key exist in second index.

parameter and callback type

    /**
    *
    * @method chkKeyExistByIdx
    *
    * @param {Object} params= { CF, idx_name, idx_id}
    * @param {Function} callback
    *
    * @callback {object} rows
    * @callback {Boolean} false if target not exist
    */

getHashByKey

Get colHash object in rows[0].

parameter and callback type

    /**
    * get colHash object in rows[0]
    *
    * @method getHashByKey
    *
    * @param {Object} params= { key_id, CF}
    * @param {Function} callback
    *
    * @callback {object} rows[0].colHash
    * 
    */

getHashByKeyIn

Get rows use for the WHERE KEY IN query.

parameter and callback type

    /**
    * get rows
    * use for the WHERE KEY IN query
    *
    * @method getHashByKeyIn
    *
    * @param {Object} params= { keyArr, CF}
    * @param {Function} callback
    *
    * @callback {object} rows
    * 
    */

insertColtoKey

Insert a column KEY VALUE to a CF.

parameter and callback type

    /**
    * insert a column KEY VALUE to a CF
    *
    * @method insertColtoKey
    *
    * @param {Object} params= { key_id, CF, col_val, col_name}
    * @param {Function} callback
    *
    * @callback {boolean} 
    * 
    */

updateColtoKey

Update a column KEY VALUE to a CF, similar to INSERT.

parameter and callback type

    /**
    * UPDATE a column KEY VALUE to a CF, similar to INSERT
    *
    * @method updateColtoKey
    *
    * @param {Object} params= { key_id, CF, col_val, col_name}
    * @param {Function} callback
    *
    * @callback {boolean} 
    * 
    */

updateColstoKey

Update many cols to a CF KEY.

parameter and callback type

    /**
    * UPDATE **MANY cols to a CF KEY
    *
    * @method updateColstoKey
    *
    * @param {Object} params= { key_id, CF}
    * @param {Object} object maps column names to column values, colObj= {name: "william", gender: "male"...}
    * @param {Function} callback
    *
    * @callback {boolean} 
    * 
    */

incrCounter

INCR a counter column value from CF, CFkey.

parameter and callback type

    /**
    * INCR A COUNTER column value from CF, CFkey
    *
    * @method incrCounter
    *
    * @param {Object} params= { CF, key_id, col_name}
    * @param {Number} num how much u want to incr
    * @param {Function} callback
    *
    * @callback {boolean} 
    * 
    */

incrManyCols

INCR many counter column value from CF, CFkey.

parameter and callback type

    /**
    * INCR MANY COUNTER column value from CF, CFkey
    *
    * @method incrManyCols
    *
    * @param {Object} params= { CF, key_id}
    * @param {Object} colObj = {down: 1, member: 3}
    * @param {Function} callback
    *
    * @callback {boolean} 
    * 
    */

incrAllByOne

INCR many counter column by one from CF, CFkey.

parameter and callback type

    /**
    * INCR MANY COUNTER column BY ONE from CF, CFkey
    *
    * @method incrAllByOne
    *
    * @param {Object} params= { CF, key_id}
    * @param {Array} colArr = [down, upper]
    * @param {Function} callback
    *
    * @callback {boolean} 
    * 
    */

updateColsNull

Update many cols in a CF-key, which value is null use to insert in list CF.

parameter and callback type

    /**
    * UPDATE MANY COLS in a CF-key, which value is null
    * use to insert in list CF
    *
    * @method updateColsNull
    *
    * @param {Object} params= { CF, key_id}
    * @param {Array} id_arr = [id1, id2, id3...]
    * @param {Function} callback
    *
    * @callback {boolean} 
    * 
    */

deleteColFromKey

delete a column from CF, key.

parameter and callback type

    /**
    * DELETE A column from CF, key
    *
    * @method deleteColFromKey
    *
    * @param {Object} params= { CF, col_name, key_id}
    * @param {Function} callback
    *
    * @callback {Boolean} success
    * 
    */

License

(The MIT License)

Copyright (c) 2013-2015 Clubond Inc. <info@fougood.com>

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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