Strangler Design Pattern Tutorial with Examples for Programmer & Beginners

In this video we will learn about Strangler design pattern. This is the 4th design principle in Decomposition design principles category for microservices.

The Strangler Pattern is a popular design pattern to incrementally transform your Monolith application into Microservices by replacing a particular functionality with a new service. Once the new functionality is ready, the old component is strangled, the new service is put into use & the old component is decommissioned all together.

There are 3 stages in strangler pattern - Transform, Co-exist and Eliminate.
1. Transform
2. Co-exist
3. Eliminate

Modernizing an old application by incrementally developing a new i.e., strangler application around legacy application. The strangler application consists of two types of services. First, there are services that implement functionality that previously resided in the monolith. Second, there are services that implement new features. The latter are particularly useful since they demonstrate to the business the value of using microservices.

You can develop a new component, let both the new and the old component exist for a period of time and finally terminate the old component.

** Usage of this Design Pattern **
1. Use this pattern to migrate big bang monolithic application with microservice application
2. Use this pattern to avoid risk of bringing down monolithic application at once.

** Advantages of Microservices **
1. This design pattern provides a way to reduce risk while system transformation.
2. This pattern keeps old services in play while refactoring to updated versions.
3. This pattern adds new services while refactoring older services.

** Chapter Timestamps **
0:00 Welcome to Strangler design pattern
1:04 Agenda of tutorial
2:00 Introduction of Strangler design pattern
4:32 Real world examples of Strangler design pattern
8:43 Usage of Strangler design pattern
9:44 Advantages of Strangler design pattern
10:43 Summary of Strangler design pattern
11:49 Next video on BulkHead design pattern

#microservicedesignpatterns #stranglerdesignpattern #microservices

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