Building Serverless Web Applications with OpenWhisk

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This document discusses building serverless web applications using Apache OpenWhisk. It defines serverless and function as a service (FaaS), noting that servers are hidden from developers and code is executed on-demand through event triggers. It explains that serverless is often cheaper than other options since developers only pay for the duration of code execution. It also notes that serverless functions can leverage existing JavaScript skills of web developers. The document then demonstrates creating and invoking JavaScript actions on OpenWhisk, including creating web actions, API management with OAuth, and integrating an Angular application to access protected actions.

Software

Building Serverless Web Applications
with OpenWhisk
bluemix.net/openwhisk
Niklas Heidloff, IBM
Developer Advocate
@nheidloff
July 2017

What is ‘Serverless’ and ‘Function as a Service’ ?Serverless
•  Existence of servers is hidden from developers
•  Code is executed on-demand in an auto-scaled, managed
environment through event driven triggers
•  Encourages and simpliﬁes developing microservice-oriented
solutions via functions
@nheidloff

Why Serverless for Web Applications ?Serverless
•  Often cheaper than other server-side compute options since
you only pay for the exact duration your code is executing
•  Easier to operate than other compute options
–  Example: Auto-scalability
–  Example: Built-in API management
•  Serverless functions can be built with JavaScript skills which
web developers have
@nheidloff

DemosDemo
•  Creation of simple JavaScript actions
•  Web actions for anonymous access
•  API management, including OAuth access
•  Angular application accessing protected action
@nheidloff
Annotations in orange

Demo
@nheidloff
Create JavaScript Action

Demo
@nheidloff
Local Development and CLI

Demo
@nheidloff
Web Actions for anonymous Access

Demo
@nheidloff
Require User Authentication

Demo
@nheidloff
Creation of
Google Application

Demo
@nheidloff
Simple Angular Sample App

Demo
@nheidloff
Angular Code to
invoke the login

Demo
@nheidloff
Google Authentication OAuth Dance

Demo
@nheidloff
Angular Code to
invoke Action

Discussion
github.com/nheidloff/openwhisk-serverless-webapp
heidloff.net
bluemix.net/openwhisk
Niklas Heidloff, IBM
Developer Advocate
@nheidloff
July 2017

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ADR, or Architecture Decision Record, is a valuable tool in software development for several reasons. It provides a centralized location for documenting and tracking architectural decisions, aiding both current and future team members. ADRs enhance communication among team members by documenting the rationale behind architectural decisions, especially beneficial during onboarding of new team members or when revisiting decisions. They serve as a knowledge base, enabling teams to learn from past decisions and refine their decision-making process. Additionally, ADRs contribute to transparency by helping stakeholders understand the reasons behind specific architectural choices. As with any other tool or process, introducing them into an organization can face several obstacles, and overcoming these challenges is crucial for successful implementation. In this talk I go through some common problems and our way of solving them.

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In today's dynamic e-commerce landscape, the payment gateway emerges as a linchpin, ensuring smooth and secure transactions between buyers and sellers. In this discourse, we delve into the meticulous process of devising test cases tailored for scrutinizing payment gateways. Crafting precise test cases for payment gateways is a quintessential responsibility for testers operating within the service industry. This article meticulously explores pivotal scenarios integral to how to test payment gateways, coupled with essential guidelines for drafting effective test cases.

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