聊聊artemis的BaseInterceptor

  • Z时代
  • 2024-01-10
  • 分类：综合

编程

序

本文主要研究一下artemis的BaseInterceptor

BaseInterceptor

activemq-artemis-master/artemis-core-client/src/main/java/org/apache/activemq/artemis/api/core/BaseInterceptor.java

public interface BaseInterceptor<P> {
   /**
    * Intercepts a packet which is received before it is sent to the channel
    *
    * @param packet     the packet being received
    * @param connection the connection the packet was received on
    * @return {@code true} to process the next interceptor and handle the packet,
    * {@code false} to abort processing of the packet
    * @throws ActiveMQException
    */
   boolean intercept(P packet, RemotingConnection connection) throws ActiveMQException;
}

  • BaseInterceptor定义了intercept方法，该方法返回true表示可以继续下一个interceptor，返回false表示终止packet的处理

AbstractProtocolManager

activemq-artemis-master/artemis-server/src/main/java/org/apache/activemq/artemis/spi/core/protocol/AbstractProtocolManager.java

public abstract class AbstractProtocolManager<P, I extends BaseInterceptor<P>, C extends RemotingConnection> implements ProtocolManager<I> {
   private final Map<SimpleString, RoutingType> prefixes = new HashMap<>();
   protected void invokeInterceptors(final List<I> interceptors, final P message, final C connection) {
      if (interceptors != null && !interceptors.isEmpty()) {
         for (I interceptor : interceptors) {
            try {
               if (!interceptor.intercept(message, connection)) {
                  break;
               }
            } catch (Exception e) {
               ActiveMQServerLogger.LOGGER.failedToInvokeAninterceptor(e);
            }
         }
      }
   }
   @Override
   public void setAnycastPrefix(String anycastPrefix) {
      for (String prefix : anycastPrefix.split(",")) {
         prefixes.put(SimpleString.toSimpleString(prefix), RoutingType.ANYCAST);
      }
   }
   @Override
   public void setMulticastPrefix(String multicastPrefix) {
      for (String prefix : multicastPrefix.split(",")) {
         prefixes.put(SimpleString.toSimpleString(prefix), RoutingType.MULTICAST);
      }
   }
   @Override
   public Map<SimpleString, RoutingType> getPrefixes() {
      return prefixes;
   }
}

  • AbstractProtocolManager的invokeInterceptors方法接收interceptors，之后挨个遍历interceptors，执行interceptor.intercept(message, connection)，若返回false则立马终止循环

小结

BaseInterceptor定义了intercept方法，该方法返回true表示可以继续下一个interceptor，返回false表示终止packet的处理

doc

  • BaseInterceptor

以上是 聊聊artemis的BaseInterceptor 的全部内容， 来源链接： utcz.com/z/512648.html

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