3.5. 패킷을 가로채서 메시지 감사

프로세스

1. 적절한 인터페이스를 구현하고 인터셉터 () 메서드를 재정의합니다.

   1. AMQP 프로토콜을 사용하는 경우 org.apache.activemq.artemis.protocol.amqp.broker.AmqpInterceptor 인터페이스를 구현합니다.

      package com.example;
      
      import org.apache.activemq.artemis.protocol.amqp.broker.AMQPMessage;
      import org.apache.activemq.artemis.protocol.amqp.broker.AmqpInterceptor;
      import org.apache.activemq.artemis.spi.core.protocol.RemotingConnection;
      
      public class MyInterceptor implements AmqpInterceptor
      {
        private final int ACCEPTABLE_SIZE = 1024;
      
        @Override
        public boolean intercept(final AMQPMessage message, RemotingConnection connection)
        {
          int size = message.getEncodeSize();
          if (size <= ACCEPTABLE_SIZE) {
            System.out.println("This AMQPMessage has an acceptable size.");
            return true;
          }
          return false;
        }
      }

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   2. 코어 프로토콜을 사용하는 경우 인터셉터는 org.apache.artemis.activemq.api.core.Interceptor 인터페이스를 구현해야 합니다.

      package com.example;
      
      import org.apache.artemis.activemq.api.core.Interceptor;
      import org.apache.activemq.artemis.core.protocol.core.Packet;
      import org.apache.activemq.artemis.spi.core.protocol.RemotingConnection;
      
      public class MyInterceptor implements Interceptor
      {
        private final int ACCEPTABLE_SIZE = 1024;
      
        @Override
        boolean intercept(Packet packet, RemotingConnection connection)
        throws ActiveMQException
        {
          int size = packet.getPacketSize();
          if (size <= ACCEPTABLE_SIZE) {
            System.out.println("This Packet has an acceptable size.");
            return true;
          }
          return false;
        }
      }

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   3. MQTT 프로토콜을 사용하는 경우 org.apache.activemq.artemis.core.protocol.mqtt.MQTTInterceptor 인터페이스를 구현합니다.

      package com.example;
      
      import org.apache.activemq.artemis.core.protocol.mqtt.MQTTInterceptor;
      import io.netty.handler.codec.mqtt.MqttMessage;
      import org.apache.activemq.artemis.spi.core.protocol.RemotingConnection;
      
      public class MyInterceptor implements Interceptor
      {
        private final int ACCEPTABLE_SIZE = 1024;
      
        @Override
        boolean intercept(MqttMessage mqttMessage, RemotingConnection connection)
        throws ActiveMQException
        {
          byte[] msg = (mqttMessage.toString()).getBytes();
          int size = msg.length;
          if (size <= ACCEPTABLE_SIZE) {
            System.out.println("This MqttMessage has an acceptable size.");
            return true;
          }
          return false;
        }
      }

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   4. STOMP 프로토콜을 사용하는 경우 org.apache.activemq.artemis.core.protocol.stompFrameInterceptor 인터페이스를 구현합니다.

      package com.example;
      
      import org.apache.activemq.artemis.core.protocol.stomp.StompFrameInterceptor;
      import org.apache.activemq.artemis.core.protocol.stomp.StompFrame;
      import org.apache.activemq.artemis.spi.core.protocol.RemotingConnection;
      
      public class MyInterceptor implements Interceptor
      {
        private final int ACCEPTABLE_SIZE = 1024;
      
        @Override
        boolean intercept(StompFrame stompFrame, RemotingConnection connection)
        throws ActiveMQException
        {
          int size = stompFrame.getEncodedSize();
          if (size <= ACCEPTABLE_SIZE) {
            System.out.println("This StompFrame has an acceptable size.");
            return true;
          }
          return false;
        }
      }

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프로세스

1. Open <broker_instance_dir>/etc/broker.xml

2. <broker _instance_dir> /etc/broker.xml에 구성을 추가하여 인터셉터를 사용하도록 브로커를 구성합니다.

   1. 인터셉터가 들어오는 메시지를 대상으로 하는 경우 해당 클래스 이름을 remoting- incoming-interceptors 목록에 추가합니다.

      <configuration>
        <core>
          ...
          <remoting-incoming-interceptors>
             <class-name>org.example.MyIncomingInterceptor</class-name>
          </remoting-incoming-interceptors>
          ...
        </core>
      </configuration>

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   2. 인터셉터가 발신 메시지를 위한 경우 해당 class-name 을 remoting-outgoing-interceptors 목록에 추가합니다.

      <configuration>
        <core>
          ...
          <remoting-outgoing-interceptors>
             <class-name>org.example.MyOutgoingInterceptor</class-name>
          </remoting-outgoing-interceptors>
        </core>
      </configuration>

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