In the spring-boot
module, you can find two classes to create files that are often
useful for process monitoring:
ApplicationPidFileWriter
creates a file containing the application PID (by default,
in the application directory with a file name of application.pid
).WebServerPortFileWriter
creates a file (or files) containing 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:
57.1 Extending Configuration
In the META-INF/spring.factories
file, you can activate the listener(s) that writes a
PID file, as shown in the following example:
org.springframework.context.ApplicationListener=\
org.springframework.boot.context.ApplicationPidFileWriter,\
org.springframework.boot.web.context.WebServerPortFileWriter
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.