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JAVA EXAMPLE PROGRAMS

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Spring Boot – Profile based properties example.


A profile is a set of settings that can be configured to override settings from application.properties. Each profile is contained in a file named application-profilename.properties where profilename is the name of the profile. Now, a profile could configure anything you want, however for most projects it is proposed to have the following profiles:

dev for your local development settings

staging for your staging server settings

prod for your production settings

test for running your tests

Whether you have all above environment in your application or not, you must have a dev, a prod and a test profile. The configuration for these environments needs to be different for obvious reasons. Now lets see how spring boot manages profile based properties in any application. All you need is create different properties for different profiles or environments as shown below:

application.properties
cmdb.resource-url=http://java2novice.com
cmdb.resourcePort[0]=80
cmdb.resourcePort[1]=443
cmdb.resourceCount=2


application-dev.properties
cmdb.resource-url=http://dev.java2novice.com
cmdb.resourcePort[0]=8080
cmdb.resourceCount=2


application-prod.properties
cmdb.resource-url=http://java2novice.com
cmdb.resourcePort[0]=80
cmdb.resourcePort[1]=443
cmdb.resourceCount=2

Spring boot will bind all the properties to below class:

package com.java2novice.springboot.util;

import java.util.List;

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;

import org.hibernate.validator.constraints.NotEmpty;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;

@Configuration
@ConfigurationProperties("cmdb")
public class CmdbProperties {

	@NotEmpty
	private String resourceUrl;

	private List<Integer> resourcePort;

	@Max(5)
    @Min(0)
	private Integer resourceCount;

	@Override
	public String toString() {

		return "resourceUrl: "+ this.resourceUrl+"\n"
				+ "resourcePort: "+this.resourcePort+"\n"
				+ "resourceCount: "+this.resourceCount+"\n";
	}

	public String getResourceUrl() {
		return resourceUrl;
	}
	public void setResourceUrl(String resourceUrl) {
		this.resourceUrl = resourceUrl;
	}
	public List<Integer> getResourcePort() {
		return resourcePort;
	}
	public void setResourcePort(List<Integer> resourcePort) {
		this.resourcePort = resourcePort;
	}

	public Integer getResourceCount() {
		return resourceCount;
	}

	public void setResourceCount(Integer resourceCount) {
		this.resourceCount = resourceCount;
	}
}

And here is the Spring boot application class:

package com.java2novice.springboot;

import javax.annotation.PostConstruct;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import com.java2novice.springboot.util.CmdbProperties;

@SpringBootApplication
public class SpringBootWebApplication {

	private static Logger logger = LoggerFactory.getLogger(SpringBootWebApplication.class);

	@Autowired
	private CmdbProperties cmdbProperties;

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

	@PostConstruct
	public void init() {

		logger.info(cmdbProperties.toString());
	}
}

Now package the application and run: You can pass the profile values as part of command line arguments by using "-Dspring.profiles.active". We will pass prod profile as an input:

Output:
java -jar -Dspring.profiles.active=prod target/spring-boot-tutorials-0.0.1-SNAPSHOT.jar

resourceUrl: http://java2novice.com
resourcePort: [80, 443]
resourceCount: 2

Output:
java -jar -Dspring.profiles.active=dev target/spring-boot-tutorials-0.0.1-SNAPSHOT.jar
resourceUrl: http://dev.java2novice.com
resourcePort: [8080]
resourceCount: 2
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Spring-Boot Examples

  1. Spring-Boot initial setup.
  2. Spring-Boot hello world example
  3. What is spring-boot-starter-parent in Spring-Boot pom.xml file?
  4. What is @SpringBootApplication annotation in spring boot?
  5. What is application.properties in spring boot?
  6. What is @ConfigurationProperties annotation in spring boot?
  7. Spring Boot @ConfigurationProperties example
  8. Spring Boot @ConfigurationProperties Property Validation
  9. Difference between @ConfigurationProperties and @Value
  10. Spring boot web application configurations.
  11. How to run spring boot application through command line?
  12. How to run spring boot as a standalone application (non-web)?
  13. Spring boot property resolution order.
  14. Spring Boot – Profile based properties example.
  15. How to configure logback (SLF4J) logging to spring boot applications?
  16. How to update application context path in spring boot?
  17. How to disable spring logo banner in spring boot?
  18. Spring Data JPA with Spring Boot Applications - Oracle - example
  19. Spring Data JPA with Spring Boot Applications - MySql example
  20. How to configure Spring Boot to show Hibernate SQL Query in logs?
  21. Spring Boot – List all Beans loaded in the ApplicationContext
Knowledge Centre
Default value of a local variables?
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected] or you can comment on the page.

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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