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| // Copyright 2014, Yahoo! Inc.
// Copyrights licensed under the Mit License. See the accompanying LICENSE file for terms.
var Promise = require('promise');
var ConnectionAdapter = require('./connectionAdapter');
/**
* Riak accessor class
*
* @class RiakConnectionAdapter
* @extends ConnectionAdapter
* @param {object} [options]
* @param {object} [options.schema='http']
* @param {object} [options.host='localhost']
* @param {object} [options.port=8098]
* @constructor
*
* @property {string} _schema
* @property {string} _host
* @property {int} _port
*/
var RiakConnectionAdapter = ConnectionAdapter.extend(
{
/**
* Initializes the source-adapter
*
* @method initialize
*/
initialize: function () {
this.__super();
this._schema = this._options.schema || 'http';
this._host = this._options.host || 'localhost';
this._port = this._options.port || 8098;
},
/**
* Gets the complete url for a path specified
*
* @method _getUrlWithPath
* @param {string} path
* @return {string}
* @private
*/
_getUrlWithPath: function (path) {
return this._schema + '://' + this._host + ':' + this._port + path;
},
/**
* Gets all bucket names
*
* @method getBuckets
* @param {function} [filterFn]
* @return {Promise} With {string[]} List of buckets
*/
getBuckets: function (filterFn) {
return this.getPromise().then(function () {
return this._request({
method: 'GET',
url: this._getUrlWithPath('/buckets?buckets=true')
}).then(function (result) {
return JSON.parse(result.body)['buckets'];
}).then(function (result) {
if (filterFn) {
return result.filter(filterFn);
} else {
return result;
}
});
}.bind(this));
},
/**
* Does the instance have a specific bucket?
*
* @method hasBucket
* @param {string} bucket
* @param {function} [filterFn]
* @return {Promise} With {boolean} Bucket exists?
*/
hasBucket: function (bucket, filterFn) {
return this.getBuckets(filterFn).then(function (buckets) {
return (buckets.indexOf(bucket) !== -1);
});
},
/**
* Gets all bucket keys
*
* @method getBucketKeys
* @param {string} bucket
* @param {function} [filterFn]
* @return {Promise} With {string[]} Bucket keys
*/
getBucketKeys: function (bucket, filterFn) {
return this.getPromise().then(function () {
return this._request({
method: 'GET',
url: this._getUrlWithPath('/buckets/' + encodeURIComponent(bucket) + '/keys?keys=true')
}).then(function (result) {
return JSON.parse(result.body)['keys'];
}).then(function (result) {
if (filterFn) {
return result.filter(filterFn);
} else {
return result;
}
});
}.bind(this));
},
/**
* Does the instance have a specific key in a bucket?
*
* @method hasBucketKey
* @param {string} bucket
* @param {string} key
* @param {function} [filterFn]
* @return {Promise} With {boolean} Bucket key exists?
*/
hasBucketKey: function (bucket, key, filterFn) {
return this.getBucketKeys(bucket, filterFn).then(function (keys) {
return (keys.indexOf(key) !== -1);
});
},
/**
* Gets an object
*
* @method getObject
* @param {string} bucket
* @param {string} key
* @return {Promise} With {Buffer}
*/
getObject: function (bucket, key) {
return this.getPromise().then(function () {
return this._request({
method: 'GET',
url: this._getUrlWithPath('/buckets/' + encodeURIComponent(bucket) + '/keys/' + encodeURIComponent(key))
}).then(function (response) {
return response.body;
});
}.bind(this));
},
/**
* Gets an object as JSON
*
* @method getObjectAsJSON
* @param {string} bucket
* @param {string} key
* @return {Promise} With {*}
*/
getObjectAsJSON: function (bucket, key) {
return this.getObject(bucket, key).then(function (result) {
return JSON.parse(result);
});
},
/**
* Sets an object
*
* @method setObject
* @param {string} bucket
* @param {string} key
* @param {Buffer|string} data
* @param {string} [mimeType='application/octet-stream']
* @return {Promise}
*/
setObject: function (bucket, key, data, mimeType) {
mimeType = mimeType || 'application/octet-stream';
return this.getPromise().then(function () {
return this._request({
method: 'PUT',
url: this._getUrlWithPath('/buckets/' + encodeURIComponent(bucket) + '/keys/' + encodeURIComponent(key)),
headers: {
"Content-Type": mimeType
},
body: data
});
}.bind(this));
},
/**
* Sets an object from JSON
*
* @method setObjectFromJSON
* @param {string} bucket
* @param {string} key
* @param {*} data
* @return {Promise}
*/
setObjectFromJSON: function (bucket, key, data) {
return this.setObject(bucket, key, JSON.stringify(data), 'application/json');
},
/**
* Removes an object
*
* @method removeObject
* @param {string} bucket
* @param {string} key
* @return {Promise}
*/
removeObject: function (bucket, key) {
return this.getPromise().then(function () {
return this._request({
method: 'DELETE',
url: this._getUrlWithPath('/buckets/' + encodeURIComponent(bucket) + '/keys/' + encodeURIComponent(key))
});
}.bind(this));
},
/**
* Removes all object of a bucket
*
* @method removeAllObjects
* @param {string} bucket
* @return {Promise}
*/
removeAllObjects: function (bucket) {
return this.getBucketKeys(bucket).then(function (keys) {
var i, len,
promise = Promise.resolve();
for (i = 0, len = keys.length; i < len; i++) {
(function (i) {
promise = promise.then(function () {
return this.removeObject(bucket, keys[i]);
}.bind(this));
}.bind(this)(i));
}
return promise;
}.bind(this));
}
},
{
/**
* Type of class
*
* @property TYPE
* @type string
*/
TYPE: 'RiakConnectionAdapter'
});
module.exports = RiakConnectionAdapter;
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