A simple library for making microservice message calls over a variety of transports.
npm install postmaster-generalsh
npm install --save postmaster-general
`
Usage
The following snippet showcases basic usage.
`js
const PostmasterGeneral = require('postmaster-general');
const HTTPTransport = require('postmaster-general-http-transport');
const transport = new HTTPTransport();
const postmaster = new PostmasterGeneral({
requestTransport: transport,
publishTransport: transport
});
const printGreeting = (message) => {
console.log('[action:get_greeting] received');
return Promise.resolve({ greeting: 'Hello, ' + message.name });
};
// Start the Postmaster instance.
postmaster.connect()
.then(() => postmaster.addRequestListener('action:get_greeting', printGreeting))
.then(() => postmaster.listen())
.then(() => postmaster.request('action:get_greeting', { name: 'Steve' }))
.then((res) => {
// Handle the response.
console.log(res.greeting);
})
.then(() => postmaster.disconnect())
.catch((err) => {
console.log(err.message);
});
``