Why isn't Spring running my @Scheduled method?

问题

I'm a bit befuddled because I'm trying use use @Scheduled annotations, but Spring doesn't seem to be finding my methods. The end result is that, none of my methods annotated with @Scheduled are being executed.

I have invoked Spring's task magic with the following declarations:

<beans> <!-- XMLNS, XSD declarations omitted for brevity -->

  <context:component-scan base-package="com.mypackage"/>

  <task:executor id="executor" pool-size="5"/>
  <task:scheduler id="scheduler" pool-size="5"/>
  <task:annotation-driven scheduler="scheduler" executor="executor"/>

</beans>

And I have an interface that looks something like this:

package com.mypackage;

public interface MyInterface {

    public void executePeriodically();
}

With a corresponding impl like this:

package com.mypackage.impl;
// imports omitted for brevity

@Service
public class MyInterfaceImpl implements MyInterface {

    @Scheduled(cron = "0/5 * * * * ?")
    public void executePeriodically() {
        System.out.println("The time is now : " + new Date());
    }
}

Now the expected result is that I have a very noisy little guy telling me what time it is every 5 seconds...but in reality I get absolutely nothing. I've tried with the annotation on the interface method and on the impl method, but that doesn't seem to change anything.

I know for sure that the executor and scheduler are being initialized because I have the following in my log:

INFO  - ThreadPoolTaskExecutor     - Initializing ExecutorService 
INFO  - XmlWebApplicationContext   - Bean 'executor' is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
INFO  - XmlWebApplicationContext   - Bean 'executor' is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
INFO  - ThreadPoolTaskScheduler    - Initializing ExecutorService  'scheduler'
INFO  - XmlWebApplicationContext   - Bean 'scheduler' is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)

I'm not sure if that line about not being eligible is relevant or a red herring.

At the moment, I'm working around it by declaring my scheduled tasks like so:

<task:scheduled-tasks>
  <task:scheduled ref="sourceDocumentManagerImpl" method="deleteOldDocuments" cron="0 0 * * * ?"/>
</task:scheduled-tasks>

While this works perfectly fine, I'd much rather use the annotations because it's so much more convenient to see directly in the code what the expectations are for that method. Anyone know what I could be doing wrong? For the record, I'm using Spring 3.0.4

Thanks a bunch!

回答1:

add "task:annotation-driven" ?

<beans> <!-- XMLNS, XSD declarations omitted for brevity -->

  <context:component-scan base-package="com.mypackage"/>
  <task:annotation-driven/>
  <task:executor id="executor" pool-size="5"/>
  <task:scheduler id="scheduler" pool-size="5"/>
  <task:annotation-driven scheduler="scheduler" executor="executor"/>

</beans>

reference http://howtodoinjava.com/2013/04/23/4-ways-to-schedule-tasks-in-spring-3-scheduled-example/

Spring @Configuration (non-xml configuration) for annotation-driven tasks

Just add @EnableScheduling on you WebMvcConfig class

@Configuration
@EnableWebMvc
@EnableAsync
@EnableScheduling
public class WebMvcConfig extends WebMvcConfigurerAdapter {
   /** Annotations config Stuff ... **/
}

reference Spring Scheduler does not work

回答2:

So...it looks like there's a problem in Spring 3.0.x (at the very least 3.0.4 and 3.0.5) having to do with discovering @Scheduled annotations on AOP proxies. I've got a pointcut declaration wrapping the @Scheduled method with transactional advice, and that seems to be the root of the problem. If I remove the advice, the job runs. If I add it back in, Spring fails to find and create a task for my annotated method.

So, I'm going to go file a bug with the Spring folks, and in the meantime I'm stuck declaring my tasks manually.

回答3:

In spite of that I am using Spring 3.1.2, I am running into the same problem in case i place my executor and scheduler tag in ApplicationContext.xml. i have two xml configuration file for spring in my project which are :

applicationContext.xml
dispatcher-servlet.xml

So try to move your configuration to the last configuration file which spring reads. in my case it is start working by moving my configuration to dispatcher-servlet.xml

here is my example:

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:context="http://www.springframework.org/schema/context" 
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
       http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
       http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
       http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd">

    <bean id="config" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
        <property name="location" value="/WEB-INF/configuration.properties" />
    </bean>

    <!-- To fix the problem with Unicode characters in ajax responses -->
    <bean class = "org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <array>
                <bean class = "org.springframework.http.converter.StringHttpMessageConverter">
                    <property name="supportedMediaTypes" value = "text/plain;charset=UTF-8" />
                </bean>
                <bean id="byteArrayMessageConverter" class="org.springframework.http.converter.ByteArrayHttpMessageConverter" />
            </array>
        </property>
    </bean>

    <!-- Hibernate Configuration
        p:driverClassName="com.mysql.jdbc.Driver"
        p:url="jdbc:mysql://localhost:3306/iss"
        p:username="root"
        p:password="root"
    -->
    <bean name="DataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"
          p:driverClassName="org.postgresql.Driver"
          p:url="jdbc:postgresql://localhost:5432/iss"
          p:username="postgres"
          p:password=""

    />

    <!--<bean name="SessionFactory" class="org.springframework.orm.hibernate4.annotation.AnnotationSessionFactoryBean">-->
    <bean name="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource">
            <ref bean="DataSource" />
        </property>
        <property name="hibernateProperties">
            <props>
                <!--<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>-->
                <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.show_sql">true</prop>
                <!--<prop key="hibernate.current_session_context_class">thread</prop>-->
                <!--<prop key="hibernate.current_session_context_class">managed</prop>-->
                <!--<prop key="hibernate.search.default.indexBase">/tmp/hibernate/indexes/</prop>-->
                <!--<prop key="hibernate.flushMode">AUTO</prop>-->
                <prop key="hibernate.connection.useUnicode">true</prop>
                <prop key="hibernate.connection.characterEncoding">UTF-8</prop>
                <prop key="hibernate.cache.use_second_level_cache">false</prop>
                <prop key="hibernate.cache.use_query_cache">false</prop>
                <prop key="hibernate.connection.autocommit">false</prop>
            </props>
        </property>
        <property name="packagesToScan" value="iss.DB" />
    </bean>

    <bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <mvc:interceptors>
        <bean class="org.springframework.orm.hibernate4.support.OpenSessionInViewInterceptor">
            <property name="sessionFactory" ref="sessionFactory" />
        </bean>
    </mvc:interceptors>

    <tx:annotation-driven transaction-manager="txManager" proxy-target-class="true"/>


<!-- in this file it wont work
        <task:executor id="myExecutor" pool-size="1" />
    <task:scheduler id="myScheduler" pool-size="1" />
    <task:annotation-driven 
        executor="myExecutor"
        scheduler="myScheduler"/>    
-->
</beans>

dispatcher-servlet.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:task="http://www.springframework.org/schema/task"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
       http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
       http://www.springframework.org/schema/aop 
       http://www.springframework.org/schema/aop/spring-aop.xsd
       http://www.springframework.org/schema/tx 
       http://www.springframework.org/schema/tx/spring-tx-3.1.xsd
       http://www.springframework.org/schema/context 
       http://www.springframework.org/schema/context/spring-context-3.1.xsd
       http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd" 
       xmlns:context="http://www.springframework.org/schema/context">

    <bean class="org.springframework.web.servlet.mvc.support.AnnotationControllerTypePredicate"/>

    <context:component-scan base-package="iss"/>
    <context:component-scan base-package="com.hazhir"/>

    <!--Internationalization -->
    <bean id="messageSource"
          class="org.springframework.context.support.ResourceBundleMessageSource">
        <property name="basename" value="iss.languages.text" />
    </bean>

    <bean id="localChangeInterseptor"
          class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor">
        <property name="paramName" value="language" />
    </bean>

    <bean id="localeResolver"
          class="org.springframework.web.servlet.i18n.CookieLocaleResolver">
        <property name="defaultLocale" value="en_US" />
        <property name="cookieName" value="clientLanguage" />
        <property name="cookieMaxAge" value="99999999"/>
    </bean>

    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
        <property name="alwaysUseFullPath" value="true" />
        <property name="interceptors">
            <list>
                <ref bean="localChangeInterseptor" />
            </list>
        </property>
    </bean>

    <bean id="viewResolver"
          class="org.springframework.web.servlet.view.InternalResourceViewResolver"
          p:prefix="/WEB-INF/jsp/"
          p:suffix=".jsp">
        <property name="exposeContextBeansAsAttributes" value="true" />
    </bean>

    <!-- Multipart form data -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="1000000000" />
    </bean>

    <context:annotation-config />

    <!-- here is a right place for such configuration
        -->
    <task:executor id="myExecutor" pool-size="1" />
    <task:scheduler id="myScheduler" pool-size="1" />
    <task:annotation-driven 
        executor="myExecutor"
        scheduler="myScheduler"/> 
</beans>

hope it helps.

回答4:

I fixed it by adding default-lazy-init="false" to my applicationContext.xml.

<beans .....
    **default-lazy-init="false"**>

回答5:

The only difference that I see from my setup (which works), is that my class is annotated with @Component rather than @Service. Other things to check:

whether you have the proper jars on the classpath (spring-context, I think)
put a breakpoint and check whether it really isn't executing
double-check the cron expression (I admit I always consult the docs for that). Or use a fixed delay, just to check if it works
try upgrading to 3.0.5 or the latest 3.1 snapshot.

回答6:

I Solve it by remove use-default-filters="false" in context:component-scan my old config is

 <context:component-scan base-package="com.XXXx" use-default-filters="false">
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

my spring version 3.2.3

回答7:

This is pretty old question but since this keeps up coming in google search results let me add the solution that worked for me in Spring 5. For me it didn't work until I added @Component to the class having @Scheduled annotated methods.

回答8:

I solved by adding both:

xmlns:task="http://www.springframework.org/schema/task"
xmlns:tx="http://www.springframework.org/schema/tx"

then:

<!-- TASK -->
    <task:scheduler id="searchScheduler" pool-size="1"/>
    <task:executor id="searchExecutor" pool-size="1"/>
    <task:annotation-driven executor="searchExecutor"  scheduler="searchScheduler"/>

and in the bootom of my applicationContext.xml:

<tx:annotation-driven/>

来源：https://stackoverflow.com/questions/6154741/why-isnt-spring-running-my-scheduled-method

标签

Spring

annotations

scheduler