mgjam

class EmailValidator
{
    /* dependencies */

    bool IsEmailValid(string email)
    {
        if ((email?.Length ?? 0) < 3) return false;
        if (!Regex.IsMatch(email, myPattern)) return false;
        if (myBlacklistService.IsEmailBlacklisted(email)) return false;
        return true;

mgjam

class MyService
{
    private readonly ISerialCodeValidator serialCodeValidator;
    private readonly IExternalIdService externalIdService;
    private readonly IDataService dataService;
    private readonly IReportingService reportingService;
    
    MyResult Process(MyParams params)
    {
        if (!serialCodeValidator.IsSerialCodeValid(params.SerialCode)) return MyResult.InvalidSerialCode;

mgjam

class MyService
{
    /* ... dependencies ... */
    
    MyResult Process(MyParams params)
    {
        if (!IsSerialCodeValid(params.SerialCode)) return MyResult.InvalidSerialCode;
        var externalId = GetExternalId(params.SerialCode);
        StoreData(params.SerialCode, externalId);
        Report(params.SerialCode, externalId);

mgjam

class MyService
{
    /* ... dependencies ... */
    
    MyResult Process(MyParams params)
    {
        if (!Regex.IsMatch(params.SerialCode, myPattern)) return MyResult.InvalidSerialCode;
        var externalData = httpClient.Get<ExternalData>("...get external data from HTTP endpoint");
        db
            .Execute("...insert data into database...")

mgjam

dashboard.addWidgets(invocationWidget);
dashboard.addWidgets(latencyWidget);

mgjam

import { GraphWidget, IWidget, Metric } from "@aws-cdk/aws-cloudwatch";
import { Construct, Duration } from "@aws-cdk/core";

const latencyWidget = new GraphWidget({
    width: 24,
    title: 'API Latency',
    left: [new Metric({
        metricName: 'Latency',
        namespace: 'AWS/ApiGateway',
        dimensions: {'ApiName': 'apiName'},

mgjam

import { GraphWidget, IWidget, Metric } from "@aws-cdk/aws-cloudwatch";
import { Construct, Duration } from "@aws-cdk/core";

const invocationWidget = new GraphWidget({
    width: 24,
    title: 'title',
    left: [new Metric({
        metricName: 'Count',
        namespace: 'AWS/ApiGateway',
        dimensions: {'ApiName': 'apiName'},

mgjam

import { Dashboard } from "@aws-cdk/aws-cloudwatch";

const dashboard = new Dashboard(scope, 'id', {
    dashboardName: 'name'
});

mgjam

const fn = new Function(this, 'id', {
    ...,
    logRetention: RetentionDays.ONE_WEEK,
    ...
});

mgjam

class SubscriptionParams
{
    User User;
    BillingPeriod BillingPeriod;
    PaymentMethod PaymentMethod;
}

interface ISubscriptionService
{
    SubscriptionResult Subscribe(SubscriptionParams params);