[logback-user] Logging encoded google protocol buffers with logback rolling file appender

DaveJohnston dave.johnston at me.com
Fri Aug 24 14:56:33 CEST 2012

Hi Chris,

Not yet - I was hoping there was an off-the-shelf solution that would just
allow me to pass through a byte[]?   Maybe log.info("{}", byte[]) would work
fine with this ?  I thought the second argument was getting cast to a
string, but maybe not.

If not it looks like writing my own encoder is the way to go.  I'll take a
peak at the interface and see what I can put together.

Ceki Gulcu wrote:
> Hi Dave,
> A logback encoder is fundamentally binary beast. It writes to an 
> OutputStream. Have you considered rolling your own Encoder to deal with 
> protobuf data?
> On 24.08.2012 12:30, DaveJohnston wrote:
>> Thanks Chris,
>> That looks like it might work what additional overhead does Anodyzed Onyx
>> add to the log call?  My system is processing quite a high volume of
>> traffic, so I wan't to avoid any performance costs.
>> In my case I don't need to mix readable text with the binary data - my
>> output file should just be purely binary, so maybe there is a simpler
>> solution ?
>> Chris Pratt wrote:
>>> With the Anodyzed Onyx (http://code.google.com/p/anodyzed) wrapper
>>> around
>>> Logback you can use log.debug("Google Protocol
>>> Buffer\n{0,binary,dump}",myBuffer); to write a Hex Dump style entry in
>>> the
>>> logs.
>>>    (*Chris*)
>>> On Thu, Aug 23, 2012 at 4:25 AM, Dave Johnston <dave.johnston at me.com>
>>> wrote:
>>>> Hi,
>>>> I'd like to log google protocol buffers received by my server to a
>>>> file,
>>>> for later offline processing (the data is in a byte[]).  This is
>>>> something
>>>> I only do in when a debug mode is enabled, but it is useful for
>>>> diagnostics.
>>>> Ideally I'd like to use logback, but it doesn't seem to cater for
>>>> binary
>>>> data.
>>>> I saw this issue: http://jira.qos.ch/browse/LOGBACK-232 which is marked
>>>> as fix, and is a request for the same thing.  But I can't figure out
>>>> how
>>>> to
>>>> use this with a normal rolling file appender.
>>>> Does anyone have any examples of doing this?
>>>> Cheers
> -- 
> Ceki
> http://tinyurl.com/proLogback
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> Logback-user at qos.ch
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