The ApplicationReadyEvent (https://docs.spring.io/spring-boot/docs/current/api/org/springframework/boot/context/event/ApplicationReadyEvent.html) can be used to trigger application code when a Spring Boot application is started. Let’s see how to do it in practice.
Spring Boot quickstarts
How to run a Spring Boot application from the Command Line
Running a Spring Boot application from the command line is pretty easy. Let’s see how to do it.
How to build a custom Spring Boot Starter in no time
In this tutorial we will learn how to create a custom Spring Boot Starter. Spring Boot starters make development easier and rapid. There are several built-in starters for most common tasks, however you can create your own starter too in order to reuse some functionalities across your applications.
How to run a Spring Boot application
In order to run a Spring Boot application, first of all, make sure you have included the Maven plugin in your pom.xml: <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> Next, make sure you build your application with: mvn install Now you are ready to run your Spring Boot application! Run the Spring Boot application … Read more
Spring Boot cheatsheet
Here is a Spring Boot cheatsheet:
Hello World Spring Boot
The Spring framework was launched as an alternative framework to the Java Enterprise Edition. Instead of using components such as Enterprise JavaBeans with a complex protocol structure, Spring proposed a simpler approach focusing on dependency injection and aspect-oriented programming (AOP) to get Enterprise functionality of Java EE components but using simple Java objects (POJO ).
The downside is that even though Spring is an easily extensible framework, starting from a minimal core, it is rather complex in terms of configuration.
How to set JVM settings in a Spring Boot application
The simplest way to set JVM settings in a Spring Boot application is to execute the jar file and passing the JVM settings as in the following example: $ java -Xmx32m -Xss256k -jar target/demo-app-SNAPSHOT.jar Another option is to set JVM arguments in the spring-boot-maven-plugin: For example, the following configuration suspend the process until a debugger … Read more
How to execute a Java class at Spring Boot startup
In order to execute method or classes when a Spring Boot application is started you can implement the CommandLineRunner interface, which basically provides just one method: public void run(String… args) that will get called by Spring Boot only once after the application has started. Example: package com.example; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.boot.CommandLineRunner; public class … Read more
Spring vs Spring Boot
The purpose of this tutorial is to clarify the differences between Spring and Spring Boot.
4 ways to bootstrap a Spring Boot Application
There are several ways to bootstrap a Spring Boot standalone application. One way to do it is by implementing the org.springframework.boot.CommandLineRunner interface and implementing the run(String… args) method. This is useful when you want to execute jobs or services, such as send a notification about the application or execute a SQL statement to update some … Read more