activemq消息权限策略

 在ActiveMQ发送消息的时候，可以通过MessageAuthorizationPolicy验证消息是否可以发送到消息消费者。
 package org.apache.activemq.security;

 import org.apache.activemq.broker.ConnectionContext;
 import org.apache.activemq.command.Message;

 /**
  * A plugin to allow custom message-level security checks to be performed before
  * a message is consumed.
  *
  *
  */
 public interface MessageAuthorizationPolicy {

     /**
      * Returns true if the given message is able to be dispatched to the connection
      * performing any user
      *
      * @return true if the context is allowed to consume the message
      */
     boolean isAllowedToConsume(ConnectionContext context, Message message);

 }
 设置消息生产者启动时候设置验证规则：
         在消息生产者创建消息的时候创建消息的时候，设置消息的相关权限验证字段，便于发送消息。
 @Override
     protected BrokerService createBroker() throws Exception {
         BrokerService answer = new BrokerService();
         answer.setPersistent(false);
         //设置消息权限验证策略
         answer.setMessageAuthorizationPolicy(new MessageAuthorizationPolicy() {
             public boolean isAllowedToConsume(ConnectionContext context, Message message) {
                 try {
                     Object value = message.getProperty("myHeader");
                     return "abc".equals(value);
                 }
                 catch (IOException e) {
                     System.out.println("Caught: " + e);
                     e.printStackTrace();
                     return false;
                 }
             }
         });
         answer.addConnector(bindAddress);
         return answer;
 }