Sending the initial heartbeat. - Cardinal Solutions ALF blog post

heartbeat.js

function heartbeatInit(properties) {
    
    console.log('HeartbeatService.init.heartbeatInit: Sending initial heartbeat to ALF server @ ' + properties.alfServer + ':' + properties.alfServerPort +  properties.PATH_TO_ALF_HEARTBEAT_SERVICE + ' for host "' + hostName + '"...');
    
    // Setup the data that's going to be sent to the ALF server on agent init
    var initData = {
        agentName: properties.agentName,
        hostName: hostName,
        port: properties.port,
        services: properties.services
    };
    
    // Configure the HTTP Request options
    var options = {
        host: properties.alfServer,
        port: properties.alfServerPort,
        path: properties.PATH_TO_ALF_HEARTBEAT_SERVICE,
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        }
    };
    
    // Setup the HTTP request /w the options above, and register onSuccess/onError handlers
    var request = http.request(options, function(response) {
        console.log('HeartbeatService.init.heartbeatInit: Successfully sent heartbeat.');
    });
    request.on('error', function(e) {
        console.log('HeartbeatService.init.heartbeatInit: Unable to establish a connection to the ALF server ' + properties.alfServer + '. Error Message: ' + e.message);
    });
    
    // Send the initData from above on the HTTP request
    request.write(JSON.stringify(initData));
    request.end();
};