# sync-decorator

[![NPM](https://nodei.co/npm/sync-decorator.png?compact=true)](https://nodei.co/npm/sync-decorator)

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[![Test Coverage](https://codeclimate.com/github/vladen/sync-decorator/badges/coverage.svg)](https://codeclimate.com/github/vladen/sync-decorator/coverage)

Decorator to ensure that class method is not called by several callers simultaneously at the moment.

* [Installation](#installation)
* [Usage](#usage)
* [Tests](https://github.com/vladen/sync-decorator/blob/master/SPEC.md)
* [License](#license)

## Installation

Install it via [npm](https://npmjs.com):

```
$ npm install --save sync-decorator
```

> This module requires NodeJS 6.9 or higher.

## Usage

Example code:

```js
const test = new class Test {
  @sync
  method(attempt) {
    console.log('executing', attempt);
    return new Promise(resolve => setTimeout(
      () => {
        console.log('executed', attempt);
        resolve();
      },
      1000
    ));
  }
}

test.method(1);
test.method(2);
test.method(3);
```

Console output:

```text
executing 1
executed 1
executing 2
executed 2
executing 3
executed 3
```

# License

MIT