设置/配置 EJB 定时器服务的数据源

java jakarta-ee glassfish ejb-3.1

2022-09-04 00:48:29

我正在尝试在我的应用程序中使用 EJB 3.1 中的计时器服务。

@Stateless
@LocalBean
public class StatelessTimerSessionBean {

    @Schedule(minute = "*", second = "0", dayOfMonth = "*", month = "*", year = "*", hour = "9-17", dayOfWeek = "Mon-Fri")
    public void myTimer() {
        System.out.println("Timer event: " + new Date());
    }
}

"..将 EJB 定时服务的定时数据源设置设置为有效的 JDBC 资源。.”

来自 EJB 定时器服务

我不知道如何正确配置定时器数据源？

我在部署时遇到的错误是：

SEVERE: Exception while invoking class org.glassfish.ejb.startup.EjbApplication start method
java.lang.RuntimeException: EJB Timer Service is not available

奔跑：玻璃鱼-3.1.2.2

答案 1

1. 数据库设置示例

我使用MySQL作为我的数据库。
从以下位置创建表EJB__TIMER__TBL{GF_HOME}/glassfish/lib/install/databases/ejbtimer_{DB_ENGINE}.sql

DB_ENGINE = e.g MySQL：

CREATE TABLE EJB__TIMER__TBL (
    `CREATIONTIMERAW`      BIGINT        NOT NULL,
    `BLOB`                 BLOB,
    `TIMERID`              VARCHAR(255)  NOT NULL,
    `CONTAINERID`          BIGINT        NOT NULL,
    `OWNERID`              VARCHAR(255)  NULL,
    `STATE`                INTEGER       NOT NULL,
    `PKHASHCODE`           INTEGER       NOT NULL,
    `INTERVALDURATION`     BIGINT        NOT NULL,
    `INITIALEXPIRATIONRAW` BIGINT        NOT NULL,
    `LASTEXPIRATIONRAW`    BIGINT        NOT NULL,
    `SCHEDULE`             VARCHAR(255)  NULL,
    `APPLICATIONID`        BIGINT        NOT NULL,
    CONSTRAINT `PK_EJB__TIMER__TBL` PRIMARY KEY (`TIMERID`)
);

2. 服务器配置

启动 GlassFish 服务器管理控制台：通常http://localhost:4848
在左侧导航到 [配置] > [服务器配置] > [EJB 容器]
然后单击顶部的 TAB [EJB 定时器服务]
然后填写计时器数据源：与您的JDBC资源，例如。[mysql-pu].（ 注意：默认为 jdbc/__TimerPool)
重新启动服务器

3. 结果

...
INFO: [TimerBeanContainer] Created  TimerBeanContainer: TimerBean
INFO: EJB5181:Portable JNDI names for EJB TimerBean: [java:global/ejb-timer-service-app/TimerBean, java:global/ejb-timer-service-app/TimerBean!com.sun.ejb.containers.TimerLocal]
INFO: WEB0671: Loading application [ejb-timer-service-app] at [/ejb-timer-service-app]
INFO: EJB5109:EJB Timer Service started successfully for data source [mysql-pu]
INFO: Setting DBReadBeforeTimeout to false
INFO: ==> Restoring Timers ... 
INFO: There are no EJB Timers owned by this server
INFO: <== ... Timers Restored.
...

4. 还坏了吗？计时器服务刚刚停止工作（它曾经工作过）？

因此，在充满“保存时部署”的一天之后，这发生在我身上。定时服务突然不可用。

Severe:   Exception while loading the app
Severe:   Undeployment failed for context /ejb-timer-service-app
Warning:   Cannot deploy or load EJBTimerService: org.glassfish.deployment.common.DeploymentException: Error in linking security policy for ejb-timer-service-app -- Inconsistent Module State

在此处找到的解决方案