package cn.lihu.jh.framework.tenant.core.mq.rocketmq; 
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import cn.lihu.jh.framework.tenant.core.context.TenantContextHolder; 
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import org.apache.rocketmq.client.hook.SendMessageContext; 
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import org.apache.rocketmq.client.hook.SendMessageHook; 
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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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 * RocketMQ 消息队列的多租户 {@link SendMessageHook} 实现类 
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 * 
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 * 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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 * 
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 * @author 芋道源码 
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 */ 
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public class TenantRocketMQSendMessageHook implements SendMessageHook { 
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    @Override 
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    public String hookName() { 
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        return getClass().getSimpleName(); 
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    } 
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    @Override 
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    public void sendMessageBefore(SendMessageContext sendMessageContext) { 
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        Long tenantId = TenantContextHolder.getTenantId(); 
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        if (tenantId == null) { 
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            return; 
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        } 
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        sendMessageContext.getMessage().putUserProperty(HEADER_TENANT_ID, tenantId.toString()); 
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    } 
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    @Override 
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    public void sendMessageAfter(SendMessageContext sendMessageContext) { 
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    } 
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} 
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