This version is still in development and is not considered stable yet. For the latest stable version, please use Spring Boot 3.3.5!

Process Monitoring

In the spring-boot module, you can find two classes to create files that are often useful for process monitoring:

  • ApplicationPidFileWriter creates a file that contains the application PID (by default, in the application directory with a file name of application.pid).

  • WebServerPortFileWriter creates a file (or files) that contain the ports of the running web server (by default, in the application directory with a file name of application.port).

By default, these writers are not activated, but you can enable them:

Extending Configuration

In the META-INF/spring.factories file, you can activate the listener (or listeners) that writes a PID file:

org.springframework.context.ApplicationListener=\
org.springframework.boot.context.ApplicationPidFileWriter,\
org.springframework.boot.web.context.WebServerPortFileWriter

Programmatically Enabling Process Monitoring

You can also activate a listener by invoking the SpringApplication.addListeners(…​) method and passing the appropriate Writer object. This method also lets you customize the file name and path in the Writer constructor.