io.cdap.cdap.api

Interface ProgramLifecycle<T extends RuntimeContext>

Type Parameters:

T - type of the program runtime context

All Known Subinterfaces:

Condition, CustomAction, HttpServiceHandler<T,V>, Service<T,V>, Worker

All Known Implementing Classes:

AbstractCondition, AbstractCubeHttpHandler, AbstractCustomAction, AbstractHttpServiceHandler, AbstractMapReduce, AbstractService, AbstractSpark, AbstractWorker, AbstractWorkflow, BasicService

public interface ProgramLifecycle<T extends RuntimeContext>

Defines program lifecycle.

Method Summary

Modifier and Type	Method and Description
void	destroy() Destroy is the last thing that gets called before the program is shutdown.
void	initialize(T context) Initializes a Program.

Method Detail

initialize

void initialize(T context)
         throws Exception

Initializes a Program.

This method will be called only once per ProgramLifecycle instance.

Parameters:

context - An instance of RuntimeContext

Throws:

Exception - If there is any error during initialization.

destroy

void destroy()

Destroy is the last thing that gets called before the program is shutdown. So, if there are any cleanups then they can be specified here.