intravenous-code-adaptor

An adaptor for wrapping code in a format usable by Intravenous

Details

See Adapting existing code for Intravenous

How to use

So, you have some sort of service that you want to use with Intravenous but its interface doesn't fit what is required by it. Here is an example.

// cakeService.js
'use strict';
 
exports = module.exports = class CakeService {
 
    constructor(logger, cakeType) {
 
        Assert(logger);
        Assert(cakeType);
        this.logger_ = logger;
        this.cakeType_ = cakeType;
    }
 
    eat() {
 
        this.logger_.info(`Nom, nom, nom - I love ${this.cakeType_} cake`);
    }
 
    get cakeType() {
 
        return this.cakeType_;
    }
};

In order to use it with Intravenous you would need to transpile the class to ES5 as Intravenous doesn't support ES6 classes. You would also need to add a $inject property. To do all this (and more) is what intravenous-code-adaptor does.

Add the package to your application

npm install intravenous-code-adaptor --save

Then use it to create a wrapper

// cakeServiceWrapper.js
'use strict';
 
const CodeAdaptor = require('intravenous-code-adaptor');
const Cake = require('./cakeService');
 
 
exports = module.exports = CodeAdaptor(
    ['logger'],
    ['myLogger'],
    (logger) => new Cake(logger, 'chocolate'),
    ['eat', 'cakeType']
);

and then add this service to your IOC container

// bootstrapper
'use strict';
 
const Intravenous = require('intravenous');
const Cake = require('./cakeServiceWrapper');
 
const container  = Intravenous.create();
container.register('myLogger', console);
container.register('cake', Cake);
 
const cake = container.get('cake');

Please check the tests and the JSDocs in the code for more information.