reactive-backend-project

Author:
Burak Inan

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Before Starting

Creating Reactive Project

1. We should add webFlux, r2dbc and reactive dependency of database

• The other dependencies are optional

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2. We should use reactive syntax to define our database in properties file

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3. Reactive library couldn't create schemas automatically. So that we have 2 choices;

• We can create bean in application main class. In this case;
  1. we should create sql file in resources and we write a query manually
  2. we can use serial data type for id column. Because it is create id automatically
  3. we will define our sql query location inside the bean
• Or we can create our table directly using DBMS
• WARNING: In both case we should be careful to use same name with entity class. Otherwise, r2dbc couldn't find the schemas and fields

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4. We have to import @Id annotation from springframework.data.annotation for Id field in the entity class

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5. Repositories should be extended to r2dbc or sub interfaces of it

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6. Reactive programming is still evolving. That's why we don't have every ready-made method in JPA. So it needs a good knowledge of SQL

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7. We can create our endpoint with 2 way;

• With Bean;
  1. We can create a router bean
  2. In this bean, we can define multiple endpoint
  3. Those endpoints don't use class path
• With traditional method;
  1. We can create separated method for each endpoint
  2. Those endpoints use class endpoint as we know

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Good To Know

Reactive Programming Tutorials

1. https://www.youtube.com/watch?v=bXcFCgQsvAE can be watched before starting to the project. It explains logic well without database connection
2. https://www.youtube.com/watch?v=3J_X1srMk3s&t=934s example with MongoDB database