Determine AVRO message size

["Golikov, Vassili" <Va...@morganstanley.com>]

Hi AVRO Dev Team

We intend to use AVRO as conversion tool to send messages between C++, .NET, and JAVA applications, where actual transport is done via TCP. I am looking for a method to get actual AVRO message size after encoding is done.

Code example:

// some function here
uint8_t* buffer[1024];

// framing code here
...

// very short and simple message just one integer
unsigned int message = 12345;

//AVRO encoding
std::auto_ptr<avro::OutputStream> out = avro::memoryOutputStream(100);
avro::EncodePtr e = avro::binaryEncoder();
e->init(*out);
avro::encode(*e, message);
std::size_t length = out->bytesCount(); // returns 100 bytes instead of 4

std::auto_ptr<avro::InputStream> in = avro::memoryInputStream(*out);
avro::StreamReader sr(*in);
sr.readBytes(&buffer[offset], length); // will read a 100 bytes instead of 4

socket_send(socket_id, buffer, length + offset); // will send 100 bytes instead of 4

Could you advise how one can figure out exact AVRO message length? It seems currently it is just a number of buffers product buffer length. Our messages are small and do not exceed 128 bytes.

Vassili Golikov
Morgan Stanley | Institutional Equity Division
1585 Broadway, 6th Floor | New York, NY  10036
Phone: +1 212 296-4568
Vassili.Golikov@morganstanley.com<ma...@morganstanley.com>


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