In this article, we will show you how to use @Profile in Spring Boot and also how to test it.

Tools used :

  1. Spring Boot 1.5.1.RELEASE
  2. Maven

1. Project Structure

A standard Maven project structure.

project directory

2. Project Dependency

Standard spring-boot-starter and spring-boot-starter-test

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
	http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <artifactId>spring-boot-profile</artifactId>
    <packaging>jar</packaging>
    <name>Spring Boot Profiles Example</name>
    <description>Spring Boot Profiles Example</description>
    <url>https://www.mkyong.com</url>
    <version>1.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.4.2.RELEASE</version>
    </parent>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <plugins>
            <!-- Package as an executable jar/war -->
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

3. Spring Boot

In Spring Boot, the default profile is ‘default‘. Review the following weather services.

3.1 An interface.

WeatherService.java

package com.mkyong.service;

public interface WeatherService {

    String forecast();

}

3.2 Profile : sunny and default.

SunnyDayService.java

package com.mkyong.service;

import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Service;

@Service
@Profile({"sunny", "default"})
public class SunnyDayService implements WeatherService {

    @Override
    public String forecast() {
        return "Today is sunny day!";
    }

}

3.3 Profile : raining.

RainingDayService.java

package com.mkyong.service;

import org.springframework.context.annotation.Profile;
import org.springframework.stereotype.Service;

@Service
@Profile("raining")
public class RainingDayService implements WeatherService {

    @Override
    public String forecast() {
        return "Today is raining day!";
    }

}

3.4 Start Spring Boot application.

Application.java

package com.mkyong;

import com.mkyong.service.WeatherService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application implements CommandLineRunner {

    @Autowired
    private WeatherService weatherService;

    @Override
    public void run(String... args) throws Exception {
        //weather forecast, default is sunny day!
        System.out.println(weatherService.forecast());
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);
    }

}

3.5 A properties file.

application.properties

# default profile is 'defau;t'
#spring.profiles.active=sunny

logging.level.=error
spring.main.banner-mode=off

4. Unit Test

Some Unit test examples.

4.1 Unit test a service class. Set an active profile via @ActiveProfiles

TestWeatherService.java

package com.mkyong;

import com.mkyong.service.WeatherService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.ActiveProfiles;
import org.springframework.test.context.junit4.SpringRunner;

import static org.assertj.core.api.Assertions.assertThat;

@RunWith(SpringRunner.class)
@SpringBootTest
@ActiveProfiles("raining")
public class TestWeatherService {

    @Autowired
    WeatherService weatherService;

    @Test
    public void testRainingProfile() throws Exception {
        String output = weatherService.forecast();
        assertThat(output).contains("Today is raining day!");
    }
}

4.2 Unit test a Spring Boot application. You can set an active profile via property spring.profiles.active

TestApplication.java

package com.mkyong;

import org.junit.After;
import org.junit.Rule;
import org.junit.Test;
import org.springframework.boot.test.rule.OutputCapture;

import static org.assertj.core.api.Assertions.assertThat;

public class TestApplication {

    @Rule
    public OutputCapture outputCapture = new OutputCapture();

    @Test
    public void testDefaultProfile() throws Exception {
        Application.main(new String[0]);
        String output = this.outputCapture.toString();
        assertThat(output).contains("Today is sunny day!");
    }

    @Test
    public void testRainingProfile() throws Exception {
        System.setProperty("spring.profiles.active", "raining");
        Application.main(new String[0]);
        String output = this.outputCapture.toString();
        assertThat(output).contains("Today is raining day!");
    }

    @Test
    public void testRainingProfile_withDoption() throws Exception {
        Application.main(new String[]{"--spring.profiles.active=raining"});
        String output = this.outputCapture.toString();
        assertThat(output).contains("Today is raining day!");
    }

    @After
    public void after() {
        System.clearProperty("spring.profiles.active");
    }

}

P.S Credit to this Spring Boot SampleProfileApplicationTests example.

5. DEMO

Package and run it.


$ mvn package

#default profile, sunny day!
$ java -jar target/spring-boot-profile-1.0.jar
Today is sunny day!

# set a profile
$ java -jar -Dspring.profiles.active=raining target/spring-boot-profile-1.0.jar
Today is raining day!

Download Source Code

Download – spring-boot-profile-example.zip (5 KB)

References

  1. Spring Profiles example
  2. Spring Boot – Properties & configuration
  3. Spring Boot – Profiles