Desktop application, strange behaviour

[innovate]

Hi,

I tried to use Spring (1.1) in a Desktop application, but discovered some strange behaviours:

• * Beans have not been initalized properly
  * Jobs habe not been executed (Quartz)

In the case of bean initialization, I have a bean with static variables. After loading the application context, these variables should be initialized, but are not. Whenever I instanciate that bean (regular way), the static variables are empty, log statements in the accessor methods are signaling, that the accessor methods are never called. The same code works in a web application. - Why I do this - It is a tracing library built with aspectj which sends email if an exception will be thrown. I initialize the MailSender with Spring.

In the case of the jobs, the same code/application context works in a web application, but not in the desktop application. To give you an idea, have a look at the code:

    private BeanFactory factory;

    /**
     * Loads the Log4J configuration file and watches for changes.
     * 
     * @since 21.09.2004
     */
    static {
        DOMConfigurator.configureAndWatch(LOG4J_PATH);
    }

    /**
     * The main method.
     * 
     * @param args
     *            The arguments passed to the application.
     * 
     * @since 15.09.2004
     */
    public static void main(String[] args) {
        CDRRaterCoreEngine coreEngine = new CDRRaterCoreEngine();

        coreEngine.loadBeans();

        Lifecycle cycle = new Lifecycle();
        Thread thread = new Thread(cycle);
        thread.start();
        try {
            Thread.sleep(10000);
        } catch (InterruptedException ex) {

        }
        coreEngine.crash();
    }

    /**
     * Loads the Spring Application Context from an XML file. If the XML file
     * does not exist, we try to load the application context from the
     * classpath.
     * 
     * @throws FileNotFoundException
     *             if the application context file could not be found.
     * 
     * @since 15.09.2004
     */
    private void loadBeans() {
        try {
            InputStream stream = new FileInputStream(APPLICATION_CONTEXT_PATH);
            factory = new XmlBeanFactory(stream);
        } catch (FileNotFoundException exception) {
            ClassPathResource resource = new ClassPathResource(
                    APPLICATION_CONTEXT_NAME);
            factory = new XmlBeanFactory(resource);
        }
    }

    private void crash() {
        String string = null;
        string.length();
    }

... and the application context:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http&#58;//alaska.xxx/dtd/springframework-1.1/spring-beans.dtd" >
<beans>
     <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host">
            <value>ntserv02</value>
        </property>
    </bean>
    <bean id="mailMessage" class="org.springframework.mail.SimpleMailMessage">
        <property name="from">
            <value><!&#91;CDATA&#91;Exception Service <exception@xxx>&#93;&#93;></value>
        </property>
        <property name="subject">
            <value>Exception occured</value>
        </property>
        <property name="to">
            <value>yy@xxx</value>
        </property>
    </bean>
    <bean id="exceptionSender" class="xxx.tools.logging.ExceptionSender">
        <property name="mailSender">
            <ref bean="mailSender"></ref>
        </property>
        <property name="message">
            <ref bean="mailMessage"></ref>
        </property>
    </bean>
    <bean id="cdrrater" class="xxx.cdrrater.CdrRater"></bean>
    <bean id="scheduler"
        class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref local="cdrraterTrigger" />
            </list>
        </property>
    </bean>
    <bean id="cdrraterJobDetail"
        class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <property name="targetObject">
            <ref bean="cdrrater" />
        </property>
        <property name="targetMethod">
            <value>rate</value>
        </property>
    </bean>
    <bean id="cdrraterTrigger"
        class="org.springframework.scheduling.quartz.SimpleTriggerBean">
        <property name="jobDetail">
            <ref local="cdrraterJobDetail" />
        </property>
        <property name="repeatInterval">
            <value>100</value>
        </property>
    </bean>
</beans>

Is there a simple explication of this behaviour?

Thanks,

Cyrill

[robh]

Cyrill,

The problem here is that you are not using an ApplicationContext you are using a BeanFactory. This means that no beans are instantiated up front. To overcome this either call XmlBeanFactory.preInstantiateSingletons() or, more preferable, swap XmlBeanFactory for something like FileSystemXmlApplicationContext or ClassPathXmlApplicationContext.

Rob

[innovate]

Hi,

Thanks, It is working now