RabbitMQ spring 使用總結

rabbitMQ相關概念不在本文介紹範圍，rabbitMQ官網和其餘博客都有大量介紹。

本文重點內容是spring和rabbit環境搭建以及使用中注意事項總結。

1.1   rabbitMQ服務器搭建

下載安裝官網最新版本服務器

1.2   rabbitMQ開啓服務管理

rabbitMQ start 啓動

1.3   spring pom配置

<spring-rabbit.version>1.3.9.RELEASE</spring-rabbit.version>
<!-- 消息隊列 rabbitmq -->
<dependency>
    <groupId>com.rabbitmq</groupId>
    <artifactId>amqp-client</artifactId>
    <version>${rabbitmq-client.version}</version>
</dependency>
<dependency>
    <groupId>org.springframework.amqp</groupId>
    <artifactId>spring-rabbit</artifactId>
    <version>${spring-rabbit.version}</version>
</dependency>

1.4   spring config配置

在D:\workspace\sps\src\main\resources\spring-rabbitmq.xml

配置以下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:rabbit="http://www.springframework.org/schema/rabbit"
       xmlns="http://www.springframework.org/schema/beans"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
      http://www.springframework.org/schema/mvc
     http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit.xsd">

    <mvc:annotation-driven />


    <rabbit:connection-factory id="connectionFactory" host="${rabbitmq.master.ip}" port="${rabbitmq.master.port}" username="${rabbitmq.master.username}" password="${rabbitmq.master.password}" />

    <rabbit:template id="amqpTemplate" connection-factory="connectionFactory"
                     exchange="order_topic_exchange" message-converter="gsonConverter" />

    <rabbit:admin connection-factory="connectionFactory" />

    <rabbit:queue name="orderQueue" durable="true"  />
    <rabbit:queue name="orderPayQueryQueue" durable="true" auto-delete="false" exclusive="false">
        <rabbit:queue-arguments>
            <entry key="x-message-ttl">
                <value  type="java.lang.Long">600000</value>
            </entry>
            <entry key="x-dead-letter-exchange" value="pay_delay_exchange"/>
        </rabbit:queue-arguments>
    </rabbit:queue>

    <rabbit:queue name="orderPayDelayQueryQueue" durable="true"/>

    <rabbit:topic-exchange name="pay_delay_exchange">
        <rabbit:bindings>
            <rabbit:binding queue="orderPayDelayQueryQueue" pattern="orderPay.#"/>
        </rabbit:bindings>
    </rabbit:topic-exchange>
    <rabbit:topic-exchange name="order_topic_exchange">
        <rabbit:bindings>
            <rabbit:binding queue="orderQueue" pattern="sps.#"/>
            <rabbit:binding queue="orderPayQueryQueue" pattern="orderPay.#"/>
        </rabbit:bindings>
    </rabbit:topic-exchange>

    <rabbit:listener-container connection-factory="connectionFactory" acknowledge="manual"  concurrency="10">
        <rabbit:listener queues="orderQueue" ref="orderQueueListener"/>

    </rabbit:listener-container>
   
    <bean id="orderQueueListener" class="com.supuy.sps.services.queue.OrderQueueListener" />

    <bean id="gsonConverter" class="com.supuy.core.mq.Gson2JsonMessageConverter"/>


</beans>

1.5  延遲消息隊列

有時候，由於各類緣由，咱們想實現延遲消費的目的，可是rabbitMQ並無提供這個功能，這時候，能夠經過x-message-ttl和x-dead-letter-exchange實現。

<rabbit:queue name="orderPayQueryQueue" durable="true" auto-delete="false" exclusive="false">
        <rabbit:queue-arguments>
            <entry key="x-message-ttl">
                <value  type="java.lang.Long">600000</value>
            </entry>
            <entry key="x-dead-letter-exchange" value="pay_delay_exchange"/>
        </rabbit:queue-arguments>
    </rabbit:queue>

1.6   生產者

@Override
public void orderBuilder(int type,String orderCode) {
    String key = "tps."+orderCode;
    orderCode = type+"."+orderCode;
    amqpMaster.convertAndSend(key, orderCode);
    logger.info("訂單加入消息隊列，訂單編碼：{}", key);
}

1.7   消費者

package com.supuy.tps.service.queue;

import com.alibaba.fastjson.JSON;
import com.rabbitmq.client.Channel;
import com.supuy.tps.common.mq.Gson2JsonMessageConverter;
import com.supuy.tps.dto.bean.WmsOrderParam;
import com.supuy.tps.service.IOrderShopService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.core.ChannelAwareMessageListener;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * Created by bill on 2016/5/31.
 */
public class OrderSendQueueListener implements ChannelAwareMessageListener {
    private static Logger logger = LoggerFactory.getLogger(OrderSendQueueListener.class);
    @Autowired
    private Gson2JsonMessageConverter messageConverter;
    @Autowired
    private IOrderShopService orderShopService;
    @Override
    public void onMessage(Message message, Channel channel) throws Exception {
        channel.basicQos(100);
        channel.basicAck(message.getMessageProperties().getDeliveryTag(), false);
        String data=(String)messageConverter.fromMessage(message);
        if (data!=null){
            WmsOrderParam wmsOrderParam= JSON.parseObject(data,WmsOrderParam.class);
            if (wmsOrderParam != null){
                wmsOrderParam.setOrderCode(wmsOrderParam.getOrderCode().substring(1));
                orderShopService.pushOrderLogInfo(wmsOrderParam);
            }
        }
    }
}

附加類Gson2JsonMessageConverter實現以下，

package com.supuy.tps.common.mq;

import com.google.gson.Gson;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.support.converter.AbstractJsonMessageConverter;
import org.springframework.amqp.support.converter.ClassMapper;
import org.springframework.amqp.support.converter.DefaultClassMapper;
import org.springframework.amqp.support.converter.MessageConversionException;

import java.io.IOException;
import java.io.UnsupportedEncodingException;

public class Gson2JsonMessageConverter extends AbstractJsonMessageConverter {
      
    private static Log log = LogFactory.getLog(Gson2JsonMessageConverter.class);
      
    private static ClassMapper classMapper =  new DefaultClassMapper();
  
    private static Gson gson = new Gson();
  
    public Gson2JsonMessageConverter() {  
        super();  
    }  


    @Override  
    protected Message createMessage(Object object,
            MessageProperties messageProperties) {
        byte[] bytes = null;  
        try {  
            String jsonString = gson.toJson(object);  
            bytes = jsonString.getBytes(getDefaultCharset());  
        }  
        catch (IOException e) {  
            throw new MessageConversionException(
                    "Failed to convert Message content", e);  
        }  
        messageProperties.setContentType(MessageProperties.CONTENT_TYPE_JSON);
        messageProperties.setContentEncoding(getDefaultCharset());  
        if (bytes != null) {  
            messageProperties.setContentLength(bytes.length);  
        }  
        classMapper.fromClass(object.getClass(), messageProperties);
        return new Message(bytes, messageProperties);
    }  
  
    @Override  
    public Object fromMessage(Message message)
            throws MessageConversionException {
        Object content = null;  
        MessageProperties properties = message.getMessageProperties();
        if (properties != null) {  
            String contentType = properties.getContentType();  
            if (contentType != null && contentType.contains("json")) {  
                String encoding = properties.getContentEncoding();  
                if (encoding == null) {  
                    encoding = getDefaultCharset();  
                }  
                try {  
                        Class<?> targetClass = getClassMapper().toClass(
                                message.getMessageProperties());
                        content = convertBytesToObject(message.getBody(),  
                                encoding, targetClass);  
                }  
                catch (IOException e) {  
                    throw new MessageConversionException(
                            "Failed to convert Message content", e);  
                }  
            }  
            else {  
                log.warn("Could not convert incoming message with content-type ["  
                        + contentType + "]");  
            }  
        }  
        if (content == null) {  
            content = message.getBody();  
        }  
        return content;  
    }  
  
    private Object convertBytesToObject(byte[] body, String encoding,  
            Class<?> clazz) throws UnsupportedEncodingException {  
        String contentAsString = new String(body, encoding);  
        return gson.fromJson(contentAsString, clazz);  
    }

    @Override
    public ClassMapper getClassMapper() {
        return new DefaultClassMapper();

    }
}

1.8   Q&A

1 ttl設置以後，下次修改時間，會報錯，這時候，須要先刪除該隊列，重啓項目。

2 接受消息以後，出現錯誤，該消息就會被持續佔有，沒法消費。因此，要活用消息的ack，nack，reject。