spring整合消息队列rabbitmq
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1.首先是生产者配置
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:rabbit="http://www.springframework.org/schema/rabbit" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-1.0.xsd"> <!-- 连接服务配置 --> <rabbit:connection-factory id="connectionFactory" host="localhost" username="guest" password="guest" port="5672" /> <rabbit:admin connection-factory="connectionFactory"/> <!-- queue 队列声明--> <rabbit:queue id="queue_one" durable="true" auto-delete="false" exclusive="false" name="queue_one"/> <!-- exchange queue binging key 绑定 --> <rabbit:direct-exchange name="my-mq-exchange" durable="true" auto-delete="false" id="my-mq-exchange"> <rabbit:bindings> <rabbit:binding queue="queue_one" key="queue_one_key"/> </rabbit:bindings> </rabbit:direct-exchange> <-- spring amqp默认的是jackson 的一个插件,目的将生产者生产的数据转换为json存入消息队列,由于fastjson的速度快于jackson,这里替换为fastjson的一个实现 --> <bean id="jsonMessageConverter" class="mq.convert.FastJsonMessageConverter"></bean> <-- spring template声明--> <rabbit:template exchange="my-mq-exchange" id="amqpTemplate" connection-factory="connectionFactory" message-converter="jsonMessageConverter"/></beans>
2.fastjson messageconver插件实现
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.AbstractMessageConverter;import org.springframework.amqp.support.converter.MessageConversionException;import fe.json.FastJson;public class FastJsonMessageConverter extends AbstractMessageConverter {private static Log log = LogFactory.getLog(FastJsonMessageConverter.class);public static final String DEFAULT_CHARSET = "UTF-8";private volatile String defaultCharset = DEFAULT_CHARSET;public FastJsonMessageConverter() {super();//init();}public void setDefaultCharset(String defaultCharset) {this.defaultCharset = (defaultCharset != null) ? defaultCharset: DEFAULT_CHARSET;}public Object fromMessage(Message message)throws MessageConversionException {return null;}public <T> T fromMessage(Message message,T t) {String json = "";try {json = new String(message.getBody(),defaultCharset);} catch (UnsupportedEncodingException e) {e.printStackTrace();}return (T) FastJson.fromJson(json, t.getClass());}protected Message createMessage(Object objectToConvert,MessageProperties messageProperties)throws MessageConversionException {byte[] bytes = null;try {String jsonString = FastJson.toJson(objectToConvert);bytes = jsonString.getBytes(this.defaultCharset);} catch (UnsupportedEncodingException e) {throw new MessageConversionException("Failed to convert Message content", e);} messageProperties.setContentType(MessageProperties.CONTENT_TYPE_JSON);messageProperties.setContentEncoding(this.defaultCharset);if (bytes != null) {messageProperties.setContentLength(bytes.length);}return new Message(bytes, messageProperties);}}
3.生产者端调用
import java.util.List;import org.springframework.amqp.core.AmqpTemplate;public class MyMqGatway {@Autowiredprivate AmqpTemplate amqpTemplate;public void sendDataToCrQueue(Object obj) {amqpTemplate.convertAndSend("queue_one_key", obj);}}
4.消费者端配置(与生产者端大同小异)
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:rabbit="http://www.springframework.org/schema/rabbit" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/rabbit http://www.springframework.org/schema/rabbit/spring-rabbit-1.0.xsd"> <!-- 连接服务配置 --> <rabbit:connection-factory id="connectionFactory" host="localhost" username="guest" password="guest" port="5672" /> <rabbit:admin connection-factory="connectionFactory"/> <!-- queue 队列声明--> <rabbit:queue id="queue_one" durable="true" auto-delete="false" exclusive="false" name="queue_one"/> <!-- exchange queue binging key 绑定 --> <rabbit:direct-exchange name="my-mq-exchange" durable="true" auto-delete="false" id="my-mq-exchange"> <rabbit:bindings> <rabbit:binding queue="queue_one" key="queue_one_key"/> </rabbit:bindings> </rabbit:direct-exchange> <!-- queue litener 观察 监听模式 当有消息到达时会通知监听在对应的队列上的监听对象--> <rabbit:listener-container connection-factory="connectionFactory" acknowledge="auto" task-executor="taskExecutor"> <rabbit:listener queues="queue_one" ref="queueOneLitener"/> </rabbit:listener-container></beans>
5.消费者端调用
import org.springframework.amqp.core.Message;import org.springframework.amqp.core.MessageListener;public class QueueOneLitener implements MessageListener{@Overridepublic void onMessage(Message message) {System.out.println(" data :" + message.getBody());}}
6.由于消费端当队列有数据到达时,对应监听的对象就会被通知到,无法做到批量获取,批量入库,因此可以在消费端缓存一个临时队列,将mq取出来的数据存入本地队列,后台线程定时批量处理即可
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