org.jppf.startup
Interface JPPFNodeStartupSPI

All Superinterfaces:

JPPFStartup, Runnable

public interface JPPFNodeStartupSPI
extends JPPFStartup

This interface represents objects that are run at node startup time.

More precisely, they are run just after the node MBeans have been registered, and just before the network handshake with the server is performed.

Classes implementing this interface must have a public no-arg constructor and implement the run() method.

Node startup classes allow a developer to perform initializations at runtime, such as load specific APIs * that can be reused in the tasks, create connection pools, subscribe to the monitoring MBeans notifications, etc. The range of applications is quite broad.

They are looked up by using the Service Provider Interface (SPI) lookup mechanism. For the SPI to find them, proceed as follows:

• in the classpath root create, if it does not exist, a folder named META-INF/services
• in this folder create a file named "org.jppf.startup.JPPFNodeStartupSPI"
• the content of this file is one or more line(s) with the fully qualified class name of an implementation of this interface
• to specifiy multiple implementations, just put one per line in the file
• there can also be multiple META-INF/services/org.jppf.startup.JPPFNodeStartupSPI resources in the classpath (for instance in multiple jar files); all of them will be looked up and processed

Author:

Laurent Cohen

Method Summary

Methods inherited from interface java.lang.Runnable

run