grexxconnect-ess

GrexxConnect External System Service (ESS) Helper

Install

npm install grexxconnect-ess --save

Features

• reject messages (since v1.0.9)
• auto-reconnect (since v1.0.5)
• custom monitoring data (since v1.0.5)
• basic receiving and responding to ESS messages

Simple Example

"use strict";
const EssConnect = require('grexxconnect-ess');

const GrexxConnectEss = new EssConnect({
    applicationName: "My Custom ESS v2.4",
    username:        "John",
    password:        "JohnsPassword",
    server:          "wss://server.com"
});

GrexxConnectEss.on('message', Message => {
    console.info('Received a message', Message.parsed, Message.content);
    const reversedValue = (Message.parsed.content || '').split("").reverse().join("");
    Message.resolve([{
        reference: 'outputField',
        values:    [{ value: reversedValue }]
    }])
});

Full Example

"use strict";
const EssConnect = require('grexxconnect-ess');

const GrexxConnectEss = new EssConnect({
    applicationName: "My Custom ESS v2.4",
    username:        "John",
    password:        "JohnsPassword",
    server:          "wss://server.com",
    debug:           true
});

GrexxConnectEss.on('message', Message => {
    console.info('Received a message', Message.parsed, Message.content);
    const reversedValue = (Message.parsed.content || '').split("").reverse().join("");
    
    if( reversedValue === 'error' ) {
        Message.reject('Error message for production', 'Error message for debugging', {
            additionalErrorContext:"Include additional error info here"
        });
    } else {
        Message.resolve([{
            reference: 'outputField',
            values:    [{ value: reversedValue }]
        }]);
    }
});

GrexxConnectEss.setMonitoringResponse(() => {
    return {
        //== required. can be 'ok', 'warning', 'error'
        status:          'ok',
        //== Optional extra status data. Can be whatever you want.
        messagesInQueue: 0,
        lastMessage:     '10 days ago'
    };
});

GrexxConnectEss.on('authorized', serviceName => console.info('Authorized!', serviceName));
GrexxConnectEss.on('disconnected', () => console.info('Disconnected!'));
GrexxConnectEss.on('error', error => console.error('Error: ', error));