Logging Microservice Client SDK for Node.js / ES2017

This is a Node.js client SDK for service-logging microservice. It provides an easy to use abstraction over communication protocols:

• HTTP/REST client
• Seneca client (see http://www.senecajs.org)
• Direct client for monolythic deployments
• Null client to be used in testing

This client SDK also contains Direct, REST and Seneca loggers that allow to directly log into the microservice.

Quick Links:

• Development Guide
• API Version 1

Install

Add dependency to the client SDK into package.json file of your project

{
    ...
    "dependencies": {
        ....
        "client-logging-node": "^1.0.*",
        ...
    }
}

Then install the dependency using npm tool

# Install new dependencies
npm install

# Update already installed dependencies
npm update

Use

Inside your code get the reference to the client SDK

var sdk = new require('client-logging-node');

Define client configuration parameters that match configuration of the microservice external API

// Client configuration
var config = {
    connection: {
        protocol: 'http',
        host: 'localhost', 
        port: 8080
    }
};

Instantiate the client and open connection to the microservice

// Create the client instance
var client = sdk.LoggingCommandableHttpClientV1(config);

// Connect to the microservice
try {
    await client.open(null); 
    // Work with the microservice
    ...
} catch(err) {
    console.error('Connection to the microservice failed');
    console.error(err);
}

Now the client is ready to perform operations

// Log message
let event = await client.writeMessage(
    null,
    { 
        type: 'restart',
        source: 'server 1',
        message: 'Server restarted'
    }
);

var now = new Date();

// Get the messages for server 1 for the last day
let page = await client.readMessages(
    null,
    {
        from: new Date(now.getTime() - 24 * 3600 * 1000),
        to: now,
        source: 'server 1'
    },
    {
        total: true,
        skip: 0, 
        take: 100
    }
);

Acknowledgements

This client SDK was created and currently maintained by Sergey Seroukhov.