ActiveMQ实现商品添加时更新索引库

第一步：当添加商品时通过消息中间件ActiveMQ发送消息
配置

    <!-- 真正可以产生Connection的ConnectionFactory，由对应的 JMS服务厂商提供 -->
	<bean id="targetConnectionFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
		<property name="brokerURL" value="tcp://192.168.25.133:61616" />
	</bean>
	<!-- Spring用于管理真正的ConnectionFactory的ConnectionFactory -->
	<bean id="connectionFactory"
		  class="org.springframework.jms.connection.SingleConnectionFactory">
		<!-- 目标ConnectionFactory对应真实的可以产生JMS Connection的ConnectionFactory -->
		<property name="targetConnectionFactory" ref="targetConnectionFactory" />
	</bean>
	<!-- 配置生产者 -->
	<!-- Spring提供的JMS工具类，它可以进行消息发送、接收等 -->
	<bean id="jmsTemplate" class="org.springframework.jms.core.JmsTemplate">
		<!-- 这个connectionFactory对应的是我们定义的Spring提供的那个ConnectionFactory对象 -->
		<property name="connectionFactory" ref="connectionFactory" />
	</bean>
	<bean id="topicDestination" class="org.apache.activemq.command.ActiveMQTopic">
		<constructor-arg value="topic" />
	</bean>

	@Autowired
	private JmsTemplate jmsTemplate;
	@Resource
	private Destination topicDestination;
    @Override
	public E3Result addItem(TbItem tbItem, String desc) {
		final long id = IDUtils.genItemId();
		tbItem.setId(id);
		tbItem.setStatus((byte)1);
		tbItem.setCreated(new Date());
		tbItem.setUpdated(new Date());
		tbItemMapper.insert(tbItem);

		TbItemDesc tbItemDesc=new TbItemDesc();
		tbItemDesc.setItemDesc(desc);
		tbItemDesc.setItemId(id);
		tbItemDesc.setCreated(new Date());
		tbItemDesc.setUpdated(new Date());
		tbItemDescMapper.insert(tbItemDesc);
        //在响应之前需要将添加商品信息这个消息发出去，
        //告诉监听器，你需要把我新插入的数据更新到索引库
        jmsTemplate.send(topicDestination, new MessageCreator() {
			@Override
			public Message createMessage(Session session) throws JMSException {
				return session.createTextMessage(id+"");
			}
		});
		return E3Result.ok();
	}

此时消息已经发送。
第二步：监听消息，
配置：

SearchItem getItemByid(long id);

<!-- 监听商品添加消息，同步索引库 -->
	<bean id="itemAddMessageListener" class="cn.e3mall.search.message.ItemAddMessageListener"/>
	<bean class="org.springframework.jms.listener.DefaultMessageListenerContainer">
		<property name="connectionFactory" ref="connectionFactory" />
		<property name="destination" ref="topicDestination" />
		<property name="messageListener" ref="itemAddMessageListener" />
	</bean>

<select id="getItemByid" parameterType="long" resultType="cn.e3mall.common.pojo.SearchItem">
		SELECT
			a.id,
			a.title,
			a.sell_point,
			a.price,
			a.image,
			b. NAME category_name
		FROM
			tb_item a
		LEFT JOIN tb_item_cat b ON a.cid = b.id
		WHERE
			a.`status` = 1
			AND a.id=#{itemid}
	</select>

 @Autowired
    private ItemMapper itemMapper;
    @Autowired
    private SolrServer solrServer;
    @Override
    public void onMessage(Message message) {
        TextMessage messageid= (TextMessage) message;
        try {
            String text = messageid.getText();
            Long itemId=new Long(text);
            Thread.sleep(1000);
            SearchItem searchItem = itemMapper.getItemByid(itemId);
            SolrInputDocument document=new SolrInputDocument();
            //向文档对象中添加域
            document.addField("id", searchItem.getId());
            document.addField("item_title", searchItem.getTitle());
            document.addField("item_sell_point", searchItem.getSell_point());
            document.addField("item_price", searchItem.getPrice());
            document.addField("item_image", searchItem.getImage());
            document.addField("item_category_name", searchItem.getCategory_name());
            //把文档写入索引库
            solrServer.add(document);
            //提交
            solrServer.commit();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }