여러 class의 각각의 method를 각각의 간격을 두고 실행하기

1. 기본

여러 class 별로 Thread를 만들고, Thread 내에서 method를 반복해서 수행

2. 사용 예시

 1) 여러 class 의 interface 만들기

public interface ExecuteService { public int getPeriod(); public void execute(); }

 2) interface를 implements 하는 여러 class 만들기

public class A implements ExecuteService { //1초 간격으로 수행 public int getPeriod() { return 1; } public void execute() { SimpleDateFormat yyyyMMddHHmmss = new SimpleDateFormat("yyyyMMddHHmmss"); System.out.println("A : " + yyyyMMddHHmmss.format(new Date())); } } public class B implements ExecuteService { //5초 간격으로 수행 public int getPeriod() { return 5; } public void execute() { SimpleDateFormat yyyyMMddHHmmss = new SimpleDateFormat("yyyyMMddHHmmss"); System.out.println("B : " + yyyyMMddHHmmss.format(new Date())); } }

 3) 여러 class를 각각의 Thread에 설정해서 수행하는 class 만들기

public class ServiceExecutor { public void execute() { List<ExecuteService> serviceList = new ArrayList<ExecuteService>(); serviceList.add(new A()); serviceList.add(new B()); Runnable run; for (int i = 0; i < serviceList.size(); i++) { run = new RepeatService(serviceList.get(i)); Thread thread = new Thread(run); thread.start(); } } class RepeatService implements Runnable { ExecuteService executeService; RepeatService(ExecuteService executeService) { this.executeService = executeService; } public void run() { try { while(true) { Thread.sleep(executeService.getPeriod() * 1000); executeService.execute(); } } catch(InterruptedException e) { e.printStackTrace(); } } } }

 4) 3) class의 수행 method 실행하기 

public class ServiceExecutorMain { public static void main(String[] args) { ServiceExecutor serviceExecutor = new ServiceExecutor(); serviceExecutor.execute(); } }