/
counter.js
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/
counter.js
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// (The MIT License)
// Copyright (c) 2013 Nathan Aschbacher
// 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.
var Counter = function Counter(bucket, name) {
this.bucket = bucket;
this.name = name;
};
Counter.prototype.add = function(amount, _return) {
amount = parseInt(amount, 10);
if(amount) {
var query = {
path: this.bucket.client.defaults.resources.riak_kv_wm_counters + "/" +encodeURIComponent(this.bucket.name)+ "/counters/" +encodeURIComponent(this.name),
headers: { "content-type": "text/plain" },
body: amount
};
this.bucket.client.POST(query, _return);
}
else {
var err = new Error("Value needs to be an integer (positive or negative)");
err.data = amount;
_return(err);
}
};
Counter.prototype.subtract = function(amount, _return) {
amount = parseInt(amount * -1, 10);
this.add(amount, _return);
};
Counter.prototype.value = function(_return) {
var query = {
path: this.bucket.client.defaults.resources.riak_kv_wm_counters + "/" +encodeURIComponent(this.bucket.name)+ "/counters/" +encodeURIComponent(this.name)
};
this.bucket.client.GET(query, function(err, response) {
_return(err, parseInt(response.data, 10));
});
};
module.exports = Counter;