package cn.lihu.jh.framework.tenant.core.mq.rabbitmq;
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import cn.lihu.jh.framework.tenant.core.context.TenantContextHolder;
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import org.apache.kafka.clients.producer.ProducerInterceptor;
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import org.springframework.amqp.AmqpException;
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import org.springframework.amqp.core.Message;
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import org.springframework.amqp.core.MessagePostProcessor;
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import org.springframework.messaging.handler.invocation.InvocableHandlerMethod;
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import static cn.lihu.jh.framework.web.core.util.WebFrameworkUtils.HEADER_TENANT_ID;
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/**
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* RabbitMQ 消息队列的多租户 {@link ProducerInterceptor} 实现类
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*
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* 1. Producer 发送消息时，将 {@link TenantContextHolder} 租户编号，添加到消息的 Header 中
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* 2. Consumer 消费消息时，将消息的 Header 的租户编号，添加到 {@link TenantContextHolder} 中，通过 {@link InvocableHandlerMethod} 实现
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*
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* @author 芋道源码
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*/
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public class TenantRabbitMQMessagePostProcessor implements MessagePostProcessor {
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@Override
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public Message postProcessMessage(Message message) throws AmqpException {
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Long tenantId = TenantContextHolder.getTenantId();
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if (tenantId != null) {
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message.getMessageProperties().getHeaders().put(HEADER_TENANT_ID, tenantId);
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}
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return message;
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}
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}
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