JMS with Apache ActiveMQ(Spring 기반)

로그성 DB INSERT로 인해서 전체적인 DB성능 이슈가 발생하면서 어플리케이션까지 서능에 영향이 미치는 상황이 발생하였다.

처음에는 Logging 라이브러리를 활용하여 Text형태로 쌓아놓고 한가한 시간에 배치로 DB에 INSERT하려고 하다가 공부 겸 JMS(java message service)를 적용해보기로 하였다.

Message Queue 관련 방법은 여러가지가 있던데 선택은 Apache ActiveMQ 를 선택 하였다.

관련 장단점에 대해서는 인터넷 참고!!

우선 Apache ActiveMQ 설치

context-jms.xml

MemberMessageConverter.java

package pe.kr.ddakker.jms;

import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.Session;

import org.springframework.jms.support.converter.MessageConversionException;
import org.springframework.jms.support.converter.MessageConverter;

public class MemberMessageConverter implements MessageConverter {

	public MemberMessageConverter(){}
	
	@Override
	public Object fromMessage(Message message) throws JMSException,
			MessageConversionException {
		if(!(message instanceof MapMessage)){
			throw new MessageConversionException("Messaeg isn't a MapMessage");
		}
		
		MapMessage mapMessage = (MapMessage) message;
		Member member = new Member();
		member.setName(mapMessage.getString("name"));
		member.setEmail(mapMessage.getString("email"));
		return member;
	}

	@Override
	public Message toMessage(Object object, Session session) throws JMSException,
			MessageConversionException {
		if(!(object instanceof Member)){
			throw new MessageConversionException("Messaeg isn't a Member");
		}
		
		Member member = (Member) object;
		MapMessage message = session.createMapMessage();
		message.setString("name", member.getName());
		message.setString("email", member.getEmail());
		return message;
	}

}

ReceiverMessageListenerImpl.java

package pe.kr.ddakker.jms;

import javax.annotation.Resource;
import javax.jms.Message;
import javax.jms.MessageListener;

import org.springframework.jms.support.converter.MessageConverter;
import org.springframework.stereotype.Component;

@Component
public class ReceiverMessageListenerImpl implements MessageListener {


	@Resource
	private MessageConverter memberConverter;

	@Override
	public void onMessage(Message message) {
		Member member = null;
		try {
			member = (Member) memberConverter.fromMessage(message);

			if (member != null) {
				System.out.println("member.getEmail(): " + member.getEmail());
			}
		} catch (Exception e) {
			System.err.println(e);
		}

	}

}

JmsTest .java

package pe.kr.ddakker.jms;

import javax.annotation.Resource;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.jms.core.JmsTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath*:config/spring/context-jms.xml"})
public class JmsTest {
	@Resource
	private JmsTemplate jmsTemplate;
	
	@Test
	public void test() {
		
		for (int i = 0; i < 5; i++) {
			Member member = new Member();
			member.setName("ddakker" + i);
			member.setEmail("ddakker" + i + "@gmail.com");
			
			jmsTemplate.convertAndSend(member);
		}
	}
}