Book Image

The Definitive Guide to Modernizing Applications on Google Cloud

By : Steve (Satish) Sangapu, Dheeraj Panyam, Jason Marston
Book Image

The Definitive Guide to Modernizing Applications on Google Cloud

By: Steve (Satish) Sangapu, Dheeraj Panyam, Jason Marston

Overview of this book

Legacy applications, which comprise 75–80% of all enterprise applications, often end up being stuck in data centers. Modernizing these applications to make them cloud-native enables them to scale in a cloud environment without taking months or years to start seeing the benefits. This book will help software developers and solutions architects to modernize their applications on Google Cloud and transform them into cloud-native applications. This book helps you to build on your existing knowledge of enterprise application development and takes you on a journey through the six Rs: rehosting, replatforming, rearchitecting, repurchasing, retiring, and retaining. You'll learn how to modernize a legacy enterprise application on Google Cloud and build on existing assets and skills effectively. Taking an iterative and incremental approach to modernization, the book introduces the main services in Google Cloud in an easy-to-understand way that can be applied immediately to an application. By the end of this Google Cloud book, you'll have learned how to modernize a legacy enterprise application by exploring various interim architectures and tooling to develop a cloud-native microservices-based application.
Table of Contents (26 chapters)
1
Section 1: Cloud-Native Application Development and App Modernization in Google Cloud
5
Section 2: Selecting the Right Google Cloud Services
10
Section 3: Rehosting and Replatforming the Application
17
Section 4: Refactoring the Application on Cloud-Native/PaaS and Serverless in Google Cloud

Introduction to Cloud Tasks

Cloud Pub/Sub is Google's main messaging system, but there are other services that can execute similar workflows but in a limited capacity. One such service is called Cloud Tasks, which is a fully managed cloud service that can be used to executive a large number of operations asynchronously. These operations are not limited to your main application, user, or services and can be performed outside a service-to-service request independently. We'll call these operations tasks.

Cloud Tasks works on a similar basic principle as a message queue, but instead of messages, tasks are added to the queue. However, both Cloud Tasks and Cloud Pub/Sub can be used as middleware in a simple messaging system since the tasks in Cloud Tasks are just a collection of a unique name, configuration, and an optional payload (information required to complete the operation, comparable to message attributes).

One of the main differences between Cloud Tasks and Cloud...