file.js

function getOutput(requestID, _poolName) {
    var url = SEARCH_URL + '/' + requestID + '/output';
    request.get(url, function(err, response, body) {
        if (err) {
            console.error("Error requesting URL", url, err);
        } else {
            if (body) {
                console.log("Writing json response to " + _poolName + ".json");
                writeJSON(_poolname, body);
            } else {
                console.warn("No log found!");
                process.exit()
            }
        }
    })
}

function writeJSON(name, json){
    var filename = name + ".json";
    fs.writeFile(filename, json, function(err) {
        if (err) {
            console.error("Error writing to file", filename, err);
        } else {
            var obj = parseJSON(json); 

            if (obj.totalCount > 0) {
                console.log("Event Type Pattern : " + obj.records[0].values.Type + " count is : " + obj.totalCount);
            }

            if (_dataObjA == null) {
                _dataObjA = obj;
            } else {
                _dataObjB = obj;
            }

            obj = null;
            compare();
        }
    });
}

function parseJSON(json){
    try {
        var obj = JSON.parse(json);
        return obj;
    } catch (err){
        console.error("Error parsing JSON", err);
        return {};
    }
}