Question

关于@PostConstruct我有一个奇怪的问题。我有几个类，它们在初始化期间运行，以将后台任务加载到内存中。

我已经写了3个这样的课程。在启动期间只运行其中一个类PostConstruct方法。我删除了以下这些类中的其他方法，因为它们并不重要。 SchedulableService只包含帮助方法

这个工作并正确初始化，并显示在日志

中的消息

package ee.rmit.tor.ejb.timer;

import ee.rmit.tor.domain.enums.SystemParameterType;
import ee.rmit.tor.ejb.search.WorkingSearchService;
import org.slf4j.Logger;

import java.util.Calendar;
import java.util.Date;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.ejb.ScheduleExpression;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.ejb.TimerConfig;
import javax.ejb.TimerService;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

@Singleton
@Startup
@TransactionManagement(TransactionManagementType.BEAN)
public class NightlyWorkTerminationEmailSender extends SchedulableService {
    private final static String TIMER_ID = "WorkTerminationEmailNotificationServiceTimer";

    /**
     * Default schedule time
     */
    public static final String DEFAULT_SCHEDULE_TIME = "05:00";


    @PersistenceContext
    EntityManager entityManager;

    @Inject
    private Logger logger;

    @Resource
    private TimerService timerService;

    @Inject
    protected WorkingSearchService workingSearchService;


    /**
     * Schedules the timer to run at predetermined time
     */

    @PostConstruct
    public void postConstruct() {
        // get the configuration parameter from DB
        Date notificationTime = getNextExecutionTime(SystemParameterType.EMAIL_TEAVITUS_TOOTAJALE_AEG,
                                                     DEFAULT_SCHEDULE_TIME);

        Calendar calendar = Calendar.getInstance();
        calendar.setTime(notificationTime);

        String timeHhMm = calendar.get(Calendar.HOUR_OF_DAY) + ":" + calendar.get(Calendar.MINUTE);
        // create schedule
        ScheduleExpression schedule = new ScheduleExpression();
        schedule.hour(calendar.get(Calendar.HOUR_OF_DAY)).minute(calendar.get(Calendar.MINUTE));

        timerService.createCalendarTimer(schedule, new TimerConfig(TIMER_ID, false));
        logger.info("Work termination Email notification service has been scheduled to run every day at {}", timeHhMm);
    }

}

我写的几乎是同一个类，但这不会在启动时运行。我已经尝试在启动期间在这个类上设置一个断点，但它不会在这个类中破坏，也不会在日志中有任何内容。有人可以建议为什么？我一直在谷歌上搜索，但没有帮助。初始化期间的堆栈是清晰的，项目＆＃34; boot＆＃34;很好。

package ee.rmit.tor.ejb.timer;

import ee.rmit.tor.domain.enums.SystemParameterType;
import ee.rmit.tor.ejb.search.WorkingSearchService;
import org.slf4j.Logger;

import java.util.Calendar;
import java.util.Date;

import javax.annotation.PostConstruct;
import javax.annotation.Resource;
import javax.ejb.ScheduleExpression;
import javax.ejb.Singleton;
import javax.ejb.Startup;
import javax.ejb.TimerConfig;
import javax.ejb.TimerService;
import javax.ejb.TransactionManagement;
import javax.ejb.TransactionManagementType;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;

@Singleton
@Startup
@TransactionManagement(TransactionManagementType.BEAN)
public class NightlyWorkSuspensionEmailSender extends SchedulableService {
    private final static String TIMER_ID = "WorkSuspensionEmailNotificationServiceTimer";

    /**
     * Default schedule time
     */
    public static final String DEFAULT_SCHEDULE_TIME = "05:00";


    @PersistenceContext
    EntityManager entityManager;

    @Inject
    private Logger logger;

    @Resource
    private TimerService timerService;

    @Inject
    protected WorkingSearchService workingSearchService;


    /**
     * Schedules the timer to run at predetermined time
     */

    @PostConstruct
    public void postConstruct() {
        // get the configuration parameter from DB
        Date notificationTime = getNextExecutionTime(SystemParameterType.EMAIL_TEAVITUS_TOOTAJALE_AEG,
                                                     DEFAULT_SCHEDULE_TIME);

        Calendar calendar = Calendar.getInstance();
        calendar.setTime(notificationTime);

        String timeHhMm = calendar.get(Calendar.HOUR_OF_DAY) + ":" + calendar.get(Calendar.MINUTE);
        // create schedule
        ScheduleExpression schedule = new ScheduleExpression();
        schedule.hour(calendar.get(Calendar.HOUR_OF_DAY)).minute(calendar.get(Calendar.MINUTE));

        timerService.createCalendarTimer(schedule, new TimerConfig(TIMER_ID, false));
        logger.info("Work suspension Email notification service has been scheduled to run every day at {}", timeHhMm);
    }

}

为什么NightlyWorkSuspensionEmailSender postConstruct方法工作时，它与NightlyWorkTerminationEmailSender基本相同

Answer 1

您有2个具有相同界面的会话Bean。这不是一个坏习惯，但你需要不同的JNDI名称，否则会混淆容器。可能只启动了第一个EJB。

尝试为每个会话Bean创建SchedulableService的特化。

@PostConstruct方法在初始化期间不运行

1 个答案: