mbean exporting with spring-jmx using annotations

Hi,

I am a newbie to spring JMX and quartz scheduling. So trying to explain in layman form. I have a class EmailAlertMessaginService.java. It has a method startService() that needs to run every 3 hours.

I did the entry for this class in a file applicationContext-jmx-export.xml as follows :

Now, as the method startService() needs to run every 3 hours so an entry for the bean emailAlertMessagingService is being made in a file applicationContext-jmx-quartz.xml as follows:

(Not mentioning the CronTriggerBean and MethodInvokingJobDetailFactoryBean here.)

When I start the server it throws an error :

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jmxExporter' defined in ServletContext resource [/WEB-INF/applicationContext-jmx-export.xml]: Cannot resolve reference to bean 'emailAlertMessagingService' while setting bean property 'beans' with key [TypedStringValue: value [ATG_Migration:name=EmailAlertMessagingService], target type [null]]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'emailAlertMessagingService' defined in ServletContext resource [/WEB-INF/applicationContext-jmx-quartz.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException

I suppose that this is because the chatSessionBO bean it is looking for in the startService is null. Please guide me how to go about this and is there anyway by which I can do the whole thing using annotations.

Please post ChatSessionBO class/interface.

Here is the ChatSessionBO.java

@Component("chatSessionBO")
public class ChatSessionBO {

/** chatSessionDAO */
	@Autowired
	@Qualifier("chatSessionDAO")
	private ChatSessionDAO chatSessionDAO;

/** contChatSession */
	@Autowired
	@Qualifier("contChatSession")
	private MHRContChatSessionDO contChatSession;

/**
	 * Method to send reminder emails to the members
	 * who have registered for chat email alerts.
	 */
	public void sendEmailToUsers() {
		try {
			MHRContChatSessionDO chatSession = null;
			Set<MHRContChatAlertsDO> chatAlerts = new HashSet<MHRContChatAlertsDO>(0);
			EmailManager emailManager = new EmailManager();
			JavaMailSenderImpl javaMailSenderImpl = new JavaMailSenderImpl();
			emailManager.setJavaMailSenderImpl(javaMailSenderImpl);
			List<MHRContChatSessionDO> chatSessionList = (List<MHRContChatSessionDO>) chatSessionDAO
					.retrieveUserListForAlerts();
			List<MHRContChatSessionDO> newChatSessionList = null;
			newChatSessionList = identifyMembers(chatSessionList);
			if (!CollectionUtil.isEmpty(newChatSessionList)) {
				Iterator<MHRContChatSessionDO> it = newChatSessionList.iterator();
				while (it.hasNext()) {
					chatSession = (MHRContChatSessionDO) it.next();
					if (chatSession != null) {
						chatAlerts = chatSession.getChatAlerts();
						Iterator<MHRContChatAlertsDO> iter = chatAlerts.iterator();
						while (iter.hasNext()) {
							MHRContChatAlertsDO chatAlertItem = (MHRContChatAlertsDO) iter.next();
							StringBuilder sb = new StringBuilder();
							sb.append("<html><body style='font-family:Arial'>");
							sb.append("Hello");
							sb.append(chatAlertItem.getUserId().getFirstName());
							sb.append(chatAlertItem.getUserId().getLastName());
							sb.append(",");
							sb.append(" We welcome you to join our upcoming Chat discussion on the topic ");
							sb.append(chatSession.getEmailAlertTitle());
							sb.append("to be held on ");
							sb.append(chatSession.getStartTime());
							sb.append(" You can join the chat discussion from the following URL: ");
							sb.append("www.mercer.com/articles/");
							sb.append(chatAlertItem.getRegisteredLink());
							sb.append(" ");
							sb.append("If you have any questions, please do not hesitate to contact contactus@mercer.com ");
							sb.append("Thank You.");
							sb.append("</body></html>");
							String bodyContent = sb.toString();
							EmailVO emailVO = new EmailVO();
							emailVO.setTo(chatAlertItem.getUserId().getEmail());
							emailVO.setSubject("Reminder for upcoming Chat session");
							emailVO.setFrom("noreply@mercer.com");
							emailVO.setCustomMsg(bodyContent);
							//emailManager.sendEmail(emailVO);
						}
					}

}
			}

} catch (MercerException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

This is the code that I am using to export the MBeans. We are using Spring 3 and jboss.

Here is my configuration in the mapping file

<?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:task="http://www.springframework.org/schema/task"
 xmlns:context="http://www.springframework.org/schema/context"
 xsi:schemaLocation="http://www.springframework.org/schema/task http://www.springframework.org/schema/task/spring-task-3.0.xsd
		http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
		http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
		
		<task:annotation-driven/>
			<context:component-scan
			base-package="com.mercer.chat"/>
	
	<context:mbean-export/>
			
	<bean id="mbeanServer"
 class="org.springframework.jmx.support.MBeanServerFactoryBean">
 <property name="locateExistingServerIfPossible" value="true"/>
 </bean>

..........................................................
other configurations

I am not getting any error message when I start the server, but neither do I get to see the MBeans exported in jmx-console.