Profiles in Spring Boot

Spring Boot Profiles

A profile can be describe as a set of properties and configuartion settings. An application can have multiple profiles which we may use to execute in different environments, like Dev, Stage, Production. Also, we can have different databases for different profile for a particular application.

In Spring Boot, we create a different properties file for every new profile. We can control the active state of these profiles in application.properties file, which is the master properties file.

Note: If more than one profile is specified, then the last one will gain precedence.

Also Read: Spring Boot Data Rest

Steps to create a profile in Spring Boot

Step 1

Create a properties file for a profile: Define file name as - application-{profile}.properties

Example- application-Dev.properties

spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.url=jdbc:h2:mem:db;DB_CLOSE_DELAY=-1
spring.datasource.username=root
spring.datasource.password=root

Step 2

Specify profile in application.properties file 

Here, in spring.profile.active property, we mention the profile name that we want to active

spring.profile.active=Dev
spring.application.name=Profiles

Step 3 

Next step is to configure database in DBConfiguration.java

@Profile annotation is used to set a bean to a defined profile 

@Configuration
@ConfigurationProperties("spring.datasource")
public class DBConfiguration{
    private String driverClassName;
    private String url;
    private String username;
    private String password;

    @Profile("Dev")
    @Bean
    public String devDatabaseConnection(){
          return "Dev database connection";
    }
}

Note: If we user @Profile annotation as @Profile(!Dev) then this specify that this bean does not belong to Dev. And if a bean does not specify a profile then it belongs to a default bean.

Also Read: Spring Boot Application Configured As Eureka Server

That's it! This is is how you create a profile and set it's status active.

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