#activeMQ (4) - Broker

Figure

activeMQ에는 language, clustering, jmx monitoring, message, embedded broker, Persistence, DB 등 여러 특징이 있습니다.

그 중 embedded Broker, clustering, Message 등의 특징을 활용하여 제공되는 activeMQ Server 대신 직접 서버를 구현하며 여러 특징들을 실습해보았습니다.

 버전: activeMQ-all-5.15.2.jar

 jdk: jdk 1.8

1.  Embeded Broker

Java에서 activeMQ Broker Server를 직접 구하겠다면 다음과 같이 3가지 방법으로 구현할 수 있겠습니다.

=> Maven(Spring), xBean, Broker 객체를 직접 생성

 이처럼 Broker 객체를 직접 생성하여 서버를 구현해 보았습니다. ( 사실 xbean까지 사용했다면, Spring으로 구성하는 것은 문제 없다고 봅니다.)

(1) Broker 객체 생성 및 설정

public class MQServer {

	public static void main(String[] args) {

		try {
                       
                      // ActiveMQConnectionFactory를 사용하고 VM 커넥터를 URI로 사용하여 내장 브로커를 만들 수 있습니다.
		//BrokerService broker= ActiveMQConnectionFactory("vm://localhost?broker.persistent=false");
               //BrokerService broker = BrokerFactory.createBroker("broker:()/master");
                 
                             BrokerService broker = new BrokerService();
				broker.setBrokerName("Broker1");
				broker.setUseJmx(true); // check true or false
				broker.setPersistent(true);
				// broker.addConnector("tcp://localhost:61616");

				/// start() 메소드가 저장소 잠금 보류를 차단할 때 유용합니다 (예 : 슬레이브 시작).
				TransportConnector conn = new TransportConnector();
				conn.setUri(new URI("tcp://localhost:61616"));

				// failover:// 브로커 클러스터에 대한 클라이언트 연결을 업데이트
				// conn.setUpdateClusterClients(true);
				broker.addConnector(conn);
				broker.start();

		} catch (Exception e1) {
			// TODO Auto-generated catch block
			e1.printStackTrace();
		}

=> Java 코드를 활용하여 Broker 객체를 직접 만들고, JMX 설정, 메시지가 전송될 TransprotConnector Port  지정, Persistence 설정 등을 할 수 있습니다.

(2) xbean을 통한 Broker 설정

<config.xml>

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:amq="http://activemq.apache.org/schema/core" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
  http://activemq.apache.org/schema/core http://activemq.apache.org/schema/core/activemq-core.xsd">
	<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" />
	<broker useJmx="true" xmlns="http://activemq.apache.org/schema/core">
		<persistenceAdapter>
			<kahaDB directory="/123/sharedBrokerData" />
			<!-- <levelDB directory="/sharedFileSystem/sharedBrokerData"/> -->
			<!-- <amqPersistenceAdapter directory="/sharedFileSystem/sharedBrokerData"/> -->
		</persistenceAdapter>


		<destinationPolicy>
			<policyMap>
				<policyEntries>
					<policyEntry queue=">" producerFlowControl="true" memoryLimit="5mb">
						<deadLetterStrategy>
							<individualDeadLetterStrategy queuePrefix="DLQ." useQueueForQueueMessages="true" />
						</deadLetterStrategy>
					</policyEntry>
				</policyEntries>
			</policyMap>
		</destinationPolicy>
		<systemUsage>
			<systemUsage>
				<memoryUsage>
					<memoryUsage limit="420 mb" />
				</memoryUsage>
				<storeUsage>
					<storeUsage limit="1 gb" />
				</storeUsage>
				<tempUsage>
					<tempUsage limit="250 mb" />
				</tempUsage>
			</systemUsage>
		</systemUsage>




		<transportConnectors> <!-- DOS protection, limit concurrent connections to 1000 and frame size to 100MB -->
			<transportConnector uri="tcp://localhost:61636" />
			<transportConnector name="openwire" uri="tcp://0.0.0.0:61616?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600" />
			<transportConnector name="amqp" uri="amqp://0.0.0.0:5672?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600" />
			<transportConnector name="stomp" uri="stomp://0.0.0.0:61613?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600" />
			<transportConnector name="mqtt" uri="mqtt://0.0.0.0:1883?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600" />
			<!-- <transportConnector name="ws" uri="ws://0.0.0.0:61614?maximumConnections=1000&amp;wireFormat.maxFrameSize=104857600" /> -->
		</transportConnectors> <!-- destroy the spring context on shutdown to stop jetty -->


		<plugins>
			<destinationsPlugin location="/workspace/destinations" />
		</plugins>
	</broker>
</beans>

=> xml에서 Broker에 대한 설정.

<MQServer_xBean.java>

public class MQSever_Xbean {
	

	public static void main(String[] args) {
	

		try {


//xml file을 직접 읽어 들어와서 Broker를 실행
			BrokerService broker = (new XBeanBrokerFactory()).createBroker(new URI("xbean:"+MQSever_Xbean.class.getResource("").getPath()+"../../conf/activeMQ.xml"));

			broker.start();


		} catch (URISyntaxException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		} catch (Exception e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}	

	}	

}

=> 위와 같이 제대로 설정 되었다면 다음과 같이 서버가 구동되는 것을 확인할 수 있다.