Spring rabbitMq 中 correlationId或CorrelationIdString 消费者获取为null的问题
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问题
在用Spring boot 的 spring-boot-starter-amqp 快速启动 rabbitMq 是遇到了个坑
消费者端获取不到:correlationId或CorrelationIdString
问题产生的原因
correlationId 的在 spring rabbitmq 2.0 以后 byte方式会被放弃,所以 目前 代码中有些地方没有改过来,应该算一个BUG
@SuppressWarnings("deprecation") public class DefaultMessagePropertiesConverter implements MessagePropertiesConverter { @Deprecated public enum CorrelationIdPolicy { STRING, BYTES, BOTH } private static final int DEFAULT_LONG_STRING_LIMIT = 1024; private final int longStringLimit; private final boolean convertLongLongStrings; private volatile CorrelationIdPolicy correlationIdPolicy = CorrelationIdPolicy.BYTES;
}
/** * For inbound, determine whether correlationId, correlationIdString or * both are populated. For outbound, determine whether correlationIdString * or correlationId is used when mapping; if {@code CorrelationIdPolicy.BOTH} * is set for outbound, String takes priority and we fallback to bytes. * Default {@code CorrelationIdPolicy.BYTES}. * @param correlationIPolicy true to use. * @deprecated - the byte[] version of correlation id will be removed in 2.0 */ @Deprecated public void setCorrelationIdPolicy(CorrelationIdPolicy correlationIPolicy) { setCorrelationIdAsString(correlationIPolicy); } @SuppressWarnings("deprecation") public MessageProperties toMessageProperties(final BasicProperties source, final Envelope envelope, final String charset) { MessageProperties target = new MessageProperties(); Map<String, Object> headers = source.getHeaders(); if (!CollectionUtils.isEmpty(headers)) { for (Map.Entry<String, Object> entry : headers.entrySet()) { String key = entry.getKey(); if (MessageProperties.X_DELAY.equals(key)) { Object value = entry.getValue(); if (value instanceof Integer) { target.setReceivedDelay((Integer) value); } } else { target.setHeader(key, convertLongStringIfNecessary(entry.getValue(), charset)); } } } target.setTimestamp(source.getTimestamp()); target.setMessageId(source.getMessageId()); target.setReceivedUserId(source.getUserId()); target.setAppId(source.getAppId()); target.setClusterId(source.getClusterId()); target.setType(source.getType()); Integer deliveryMode = source.getDeliveryMode(); if (deliveryMode != null) { target.setReceivedDeliveryMode(MessageDeliveryMode.fromInt(deliveryMode)); } target.setDeliveryMode(null); target.setExpiration(source.getExpiration()); target.setPriority(source.getPriority()); target.setContentType(source.getContentType()); target.setContentEncoding(source.getContentEncoding()); String correlationId = source.getCorrelationId(); if (!CorrelationIdPolicy.BYTES.equals(this.correlationIdPolicy) && correlationId != null) { target.setCorrelationIdString(correlationId); } if (!CorrelationIdPolicy.STRING.equals(this.correlationIdPolicy)) { if (correlationId != null) { try { target.setCorrelationId(source.getCorrelationId().getBytes(charset)); } catch (UnsupportedEncodingException ex) { throw new AmqpUnsupportedEncodingException(ex); } } } String replyTo = source.getReplyTo(); if (replyTo != null) { target.setReplyTo(replyTo); } if (envelope != null) { target.setReceivedExchange(envelope.getExchange()); target.setReceivedRoutingKey(envelope.getRoutingKey()); target.setRedelivered(envelope.isRedeliver()); target.setDeliveryTag(envelope.getDeliveryTag()); } return target; } public BasicProperties fromMessageProperties(final MessageProperties source, final String charset) { BasicProperties.Builder target = new BasicProperties.Builder(); target.headers(this.convertHeadersIfNecessary(source.getHeaders())) .timestamp(source.getTimestamp()) .messageId(source.getMessageId()) .userId(source.getUserId()) .appId(source.getAppId()) .clusterId(source.getClusterId()) .type(source.getType()); MessageDeliveryMode deliveryMode = source.getDeliveryMode(); if (deliveryMode != null) { target.deliveryMode(MessageDeliveryMode.toInt(deliveryMode)); } target.expiration(source.getExpiration()) .priority(source.getPriority()) .contentType(source.getContentType()) .contentEncoding(source.getContentEncoding()); @SuppressWarnings("deprecation") byte[] correlationId = source.getCorrelationId(); String correlationIdString = source.getCorrelationIdString(); if (!CorrelationIdPolicy.BYTES.equals(this.correlationIdPolicy) && StringUtils.hasText(correlationIdString)) { target.correlationId(correlationIdString); correlationId = null; } if (!CorrelationIdPolicy.STRING.equals(this.correlationIdPolicy) && correlationId != null && correlationId.length > 0) { try { target.correlationId(new String(correlationId, charset)); } catch (UnsupportedEncodingException ex) { throw new AmqpUnsupportedEncodingException(ex); } } String replyTo = source.getReplyTo(); if (replyTo != null) { target.replyTo(replyTo); } return target.build(); }
解决方法
生产者:
public void topicPublish(String content) { CorrelationData correlationId = new CorrelationData(UUID.randomUUID().toString()); rabbitTemplate.convertAndSend(AmqpDirectExchangeConfig.FANOUT_EXCHANGE,"", this.buildMessage(content,correlationId.getId()), correlationId); this.log.info("消息id-{},消息内容为-{},已发送",correlationId,content); } /** * 返回rabbitTemplate * @return */ @Bean @Scope(ConfigurableBeanFactory.SCOPE_PROTOTYPE) //必须是prototype类型 public RabbitTemplate rabbitRtryTemplate() { RabbitTemplate template = new RabbitTemplate(connectionAckFactory()); template.setMessagePropertiesConverter(defaultMessagePropertiesConverter()); template.setRetryTemplate(rabbitRetry()); template.setReplyTimeout(2000);//2s秒超时 return template; } @Bean public MessagePropertiesConverter defaultMessagePropertiesConverter(){ DefaultMessagePropertiesConverter messagePropertiesConverter=new DefaultMessagePropertiesConverter(); messagePropertiesConverter.setCorrelationIdPolicy(DefaultMessagePropertiesConverter.CorrelationIdPolicy.STRING); return messagePropertiesConverter; }
消费者:
/** * 消息消费者 * @return */ @Bean public SimpleMessageListenerContainer messageContainer() { SimpleMessageListenerContainer container = new SimpleMessageListenerContainer(connectionAckFactory()); container.setQueues(queue1()); container.setExposeListenerChannel(true); container.setMessagePropertiesConverter(defaultMessagePropertiesConverter()); container.setMaxConcurrentConsumers(1); container.setConcurrentConsumers(1); container.setAcknowledgeMode(AcknowledgeMode.MANUAL); //设置确认模式手工确认 container.setMessageListener(new ChannelAwareMessageListener () { @Override public void onMessage(Message message, Channel channel) throws Exception { byte[] body = message.getBody(); MessageProperties messageProperties=message.getMessageProperties(); log.info("消费者A,从队列{},订阅到CorrelationId=[{}],消息body=[{}]", messageProperties.getConsumerQueue(), messageProperties.getCorrelationIdString(), new String(body,"utf-8")); channel.basicAck(message.getMessageProperties().getDeliveryTag(), false); //确认消息成功消费 } }); return container; }
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