使用Schedule Expression参数化EJB Scheduler

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如何解决使用schedule Expression参数化EJB scheduler？

而是使用程序化调度，这是一个示例：

@Singleton
@Startup
public class triggerJob{

    @EJB
    //some injections

    @resource
    private Timerservice timerservice;

    @postconstruct
    public voID init() {
        createTimer();
        //the following code resolve my startup problem
        try {
        preparation();
        } catch (CertificateVerificationException E) {
            e.printstacktrace();
        }
    }

    @Timeout
    public voID timerTimeout() {
        try {
        preparation();
        } catch (CertificateVerificationException E) {
        e.printstacktrace();
        }
    }

    private voID createTimer() {
        scheduleExpression scheduleExpression = new scheduleExpression();
        scheduleExpression.second("30").minute("*/5").hour("*");
        TimerConfig timerConfig = new TimerConfig();
        timerConfig.setPersistent(false);
        timerservice.createCalendarTimer(scheduleExpression, timerConfig);
        }

    public voID preparation(){
        // my scheduled tasks
    }
}

解决方法

@Singleton
@Startup
public class triggerJob {
    @EJB
   //some db injections

    @PostConstruct
    public void onStartup() {
        try {
            preparation();
        } catch (CertificateVerificationException E) {
            e.printStackTrace();
        }
    }

    @schedule(second = "30",minute = "*/5",hour = "*",persistent = falsE)
    public void preparation() {
    //my scheduled tasks
    }
}

@Singleton
@Startup
public class triggerJob {

    @EJB
    //some injections

    private Boolean runningFlag = false;

    @resource
    private Timerservice timerservice;

    public void setTimerservice(Timerservice timerservicE) {
        this.timerservice = timerservice;
    }

    @Timeout
    public void timerTimeout() {
        try {
            preparation();
        } catch (CertificateVerificationException E) {
            e.printStackTrace();
        }
    }

    @PostConstruct
    private void postCunstruct() {
        timerservice.createCalendarTimer(createschedule(),new TimerConfig("EJB timer service timeout at ",falsE));
    }

    private scheduleExpression createschedule() {
        scheduleExpression expression = new scheduleExpression();
        expression.hour("*")
                .minute("*/5")
                .second("30");
        return expression;
    }

    public void preparation(){
    // my scheduled tasks
    }
}