Upgrading to springframework.scheduling.concurrent

问题:

As of Spring 3.0 the ScheduledTimerTask is deprecated and I can't understand how to upgrade to org.springframework.scheduling.concurrent.

    <bean id="timerFactoryBean" class="org.springframework.scheduling.timer.TimerFactoryBean">
        <property name="scheduledTimerTasks">
            <list>
                 <ref bean="onlineTimeSchedule" />
            </list>
            </property>
    </bean>

    <bean id="onlineTimeSchedule" class="org.springframework.scheduling.timer.ScheduledTimerTask">
        <property name="timerTask" class="com.example.OnlineTimerTask" />
        </property>
        <property name="period" value="60000" />
        <property name="delay" value="1000" />
    </bean>

Where the OnlineTimerTask extends java.util.TimerTask. It's simple task which publishes a message to publisher every minute. I checked the documentation, but nothing.. I can't understand which way to use from the concurrent package and which suits the best.

Also I want to turn this xml into @Bean in Java.

EDIT: So I tried to implement the xml with @Bean and @Configuration instead and here is what I got.

@Configuration
public class ContextConfiguration {
    @Bean
    public ScheduledExecutorFactoryBean scheduledExecutorFactoryBean() {
        ScheduledExecutorFactoryBean scheduledFactoryBean = new ScheduledExecutorFactoryBean();
        scheduledFactoryBean.setScheduledExecutorTasks(new ScheduledExecutorTask[] {onlineTimeSchedule()});

        return scheduledFactoryBean;
    }

    @Bean
    public ScheduledExecutorTask onlineTimeSchedule() {
        ScheduledExecutorTask scheduledTask = new ScheduledExecutorTask();
        scheduledTask.setDelay(1000);
        scheduledTask.setPeriod(60000);
        scheduledTask.setRunnable(new OnlineTimerTask());

        return scheduledTask;
    }
}

Will the code above be correct replacement for xml? Will in my case the setScheduledExecutorTasks work properly? I mean will the referencing to the same bean instance, if onlineTimeSchedule() is called more than once, will work here?

scheduledFactoryBean.setScheduledExecutorTasks(new ScheduledExecutorTask[] {onlineTimeSchedule()});

回答1:

Use org.springframework.scheduling.concurrent.ScheduledExecutorFactoryBean in place of org.springframework.scheduling.timer.TimerFactoryBean and use org.springframework.scheduling.concurrent.ScheduledExecutorTask in place of org.springframework.scheduling.timer.ScheduledTimerTask. You will need to adjust the property names and values as needed but, that should be pretty self evident.

Optionally, you could refactor your com.example.OnlineTimerTask to not extend java.util.TimeTask as the ScheduledTimerTask only requires a runnable.

回答2:

Spring 4 configuration - Below configuration working after spring migration from 3.2.x to 4.6.x

<bean id="schedulerTask"
        class="org.springframework.scheduling.support.MethodInvokingRunnable">
        <property name="targetObject" ref="springJmsListnerContainer" />
        <property name="targetMethod" value="execute" />
    </bean>
    <bean id="timerTask" class="org.springframework.scheduling.concurrent.ScheduledExecutorTask">
        <property name="runnable" ref="schedulerTask" />
        <property name="delay" value="100" />
        <property name="period" value="60000" />
    </bean>
    <bean class="org.springframework.scheduling.concurrent.ScheduledExecutorFactoryBean">
        <property name="scheduledExecutorTasks">
            <list>
                <ref bean="timerTask" />
            </list>
        </property>
    </bean>

回答3:

The answer is - add one "runnable" field

 <bean id="scheduledExecutorTask" 
    class="org.springframework.scheduling.concurrent.ScheduledExecutorTask">
    <!-- wait 10 milli seconds before starting repeated execution -->
    <property name="delay">
        <value>10</value>
    </property>
    <!-- run every 1 second -->
    <property name="period">
        <value>1000</value>
    </property>
    <property name="runnable">
        <ref bean="checkInvokingTask"/>
    </property>
</bean>