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Posted to commits@pulsar.apache.org by GitBox <gi...@apache.org> on 2020/09/01 02:48:06 UTC

[GitHub] [pulsar] shengjh opened a new issue #7945: How to send a c++ struct using schema in producer ?

shengjh opened a new issue #7945:
URL: https://github.com/apache/pulsar/issues/7945


   Hello, I'm trying to send a c++ struct(protobuf generated from proto file) in my c++ producer. 
   I can set a schema for a producer, but i don't know how to send my struct.(seems the cpp doc does not explain this.)
   
   The question is, what should be passed to MessageBuilder().setContent(...)?
   ```cpp
   Message msg = MessageBuilder().setContent(...).build();
   Result res = producer.send(msg);
   ```


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[GitHub] [pulsar] BewareMyPower commented on issue #7945: How to send a c++ struct using schema in producer ?

Posted by GitBox <gi...@apache.org>.
BewareMyPower commented on issue #7945:
URL: https://github.com/apache/pulsar/issues/7945#issuecomment-684187324


   There're 2 ways to create a `Message` with C++ client
   
   ```c++
       /**
        * Set content of the message. The message contents will be managed by the system.
        */
       MessageBuilder& setContent(const void* data, size_t size);
       MessageBuilder& setContent(const std::string& data);
   
       /**
        * Set content of the message to a buffer already allocated by the caller. No copies of
        * this buffer will be made. The caller is responsible to ensure the memory buffer is
        * valid until the message has been persisted (or an error is returned).
        */
       MessageBuilder& setAllocatedContent(void* data, size_t size);
   ```
   
   - data: the pointer to your struct
   - size: the struct's size


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[GitHub] [pulsar] BewareMyPower commented on issue #7945: How to send a c++ struct using schema in producer ?

Posted by GitBox <gi...@apache.org>.
BewareMyPower commented on issue #7945:
URL: https://github.com/apache/pulsar/issues/7945#issuecomment-684505993


   You should encode your struct manually, see [#5057](https://github.com/apache/pulsar/issues/5057)


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[GitHub] [pulsar] shengjh commented on issue #7945: How to send a c++ struct using schema in producer ?

Posted by GitBox <gi...@apache.org>.
shengjh commented on issue #7945:
URL: https://github.com/apache/pulsar/issues/7945#issuecomment-684659348


   Thanks, @BewareMyPower 


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[GitHub] [pulsar] shengjh commented on issue #7945: How to send a c++ struct using schema in producer ?

Posted by GitBox <gi...@apache.org>.
shengjh commented on issue #7945:
URL: https://github.com/apache/pulsar/issues/7945#issuecomment-684449592


   In this way, how to deserialize the message in consumer? My consumer is using go client.


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[GitHub] [pulsar] shengjh closed issue #7945: How to send a c++ struct using schema in producer ?

Posted by GitBox <gi...@apache.org>.
shengjh closed issue #7945:
URL: https://github.com/apache/pulsar/issues/7945


   


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