org.springframework.amqp.support.converter.AbstractJavaTypeMapper Java Examples

/**
 * this.rabbitTemplate.convertAndSend(RabbitConfig.REGISTER_DELAY_EXCHANGE, RabbitConfig.DELAY_ROUTING_KEY, book); 对应 {@link BookHandler#listenerDelayQueue}
 */
@GetMapping
public void defaultMessage() {
    Book book = new Book();
    book.setId("1");
    book.setName("一起来学Spring Boot");
    // 添加延时队列
    this.rabbitTemplate.convertAndSend(RabbitConfig.REGISTER_DELAY_EXCHANGE, RabbitConfig.DELAY_ROUTING_KEY, book, message -> {
        // TODO 第一句是可要可不要,根据自己需要自行处理
        message.getMessageProperties().setHeader(AbstractJavaTypeMapper.DEFAULT_CONTENT_CLASSID_FIELD_NAME, Book.class.getName());
        // TODO 如果配置了 params.put("x-message-ttl", 5 * 1000); 那么这一句也可以省略,具体根据业务需要是声明 Queue 的时候就指定好延迟时间还是在发送自己控制时间
        message.getMessageProperties().setExpiration(5 * 1000 + "");
        return message;
    });
    log.info("[发送时间] - [{}]", LocalDateTime.now());
}
 

/**
 * Send a message if the message is not null.
 *
 * @param address
 *            the exchange name
 * @param message
 *            the amqp message which will be send if its not null
 */
public void sendMessage(final String address, final Message message) {
    if (message == null) {
        return;
    }
    message.getMessageProperties().getHeaders().remove(AbstractJavaTypeMapper.DEFAULT_CLASSID_FIELD_NAME);

    final String correlationId = UUID.randomUUID().toString();

    if (isCorrelationIdEmpty(message)) {
        message.getMessageProperties().setCorrelationId(correlationId);
    }

    if (LOGGER.isTraceEnabled()) {
        LOGGER.trace("Sending message {} to exchange {} with correlationId {}", message, address, correlationId);
    } else {
        LOGGER.debug("Sending message to exchange {} with correlationId {}", address, correlationId);
    }

    rabbitTemplate.send(address, null, message, new CorrelationData(correlationId));
}
 

@SuppressWarnings("unchecked")
private <T> T convertMessage(final Message message, final Class<T> clazz) {
    message.getMessageProperties().getHeaders().put(AbstractJavaTypeMapper.DEFAULT_CLASSID_FIELD_NAME,
            clazz.getTypeName());
    return (T) rabbitTemplate.getMessageConverter().fromMessage(message);
}
 

/**
 * Convert a message body to a given class and set the message header
 * AbstractJavaTypeMapper.DEFAULT_CLASSID_FIELD_NAME for Jackson converter.
 * 
 * @param message
 *            which body will converted
 * @param clazz
 *            the body class
 * @return the converted body
 */
@SuppressWarnings("unchecked")
public <T> T convertMessage(final Message message, final Class<T> clazz) {
    message.getMessageProperties().getHeaders().put(AbstractJavaTypeMapper.DEFAULT_CLASSID_FIELD_NAME,
            clazz.getTypeName());
    return (T) rabbitTemplate.getMessageConverter().fromMessage(message);
}
 

/**
 * Is needed to convert a incoming message to is originally object type.
 *
 * @param message
 *            the message to convert.
 * @param clazz
 *            the class of the originally object.
 * @return the converted object
 */
@SuppressWarnings("unchecked")
public <T> T convertMessage(@NotNull final Message message, final Class<T> clazz) {
    checkMessageBody(message);
    message.getMessageProperties().getHeaders().put(AbstractJavaTypeMapper.DEFAULT_CLASSID_FIELD_NAME,
            clazz.getName());
    return (T) rabbitTemplate.getMessageConverter().fromMessage(message);
}
 

/**
 * Clean message properties before sending a message.
 * 
 * @param message
 *            the message to cleaned up
 */
protected void cleanMessageHeaderProperties(final Message message) {
    message.getMessageProperties().getHeaders().remove(AbstractJavaTypeMapper.DEFAULT_CLASSID_FIELD_NAME);
}