[boost] Re: logging lib, v1.3

From: Johan Nilsson (johan.nilsson_at_[hidden])
Date: 2004-10-30 13:20:30

"Darryl Green" <darryl.green_at_[hidden]> wrote in message news:loom.20041030T055250-159_at_post.gmane.org...
> Beman Dawes <bdawes <at> acm.org> writes:
>> But a dependency on any thread library is likely to throw cold water on my 
>> use. Here are the likely scenarios:
>> 
>> * Light-duty uses in light-duty non-multithreaded programs, where 
>> introducing a threading dependency seems far too heavy-weight for the apps. 
> 
> There really isn't one in this case - see below.
> 
>> * Heavy-duty industrial uses. I'm not adverse personally to a threading 
>> library dependency for these apps (which are sold as libraries); , but I'd 
>> have to get permission from managers who will be very concerned about use 
>> of a threading library clashing with customer's use of other threading 
>> libraries. Whether these concerns are valid or not is almost beside the 
>> point; it will be a hassle.
> 
> The library actually supports overriding the types used for logging including
> the threading primitives used, which (unless you use the ts_appender) is only
> a simple mutex and corresponding scoped lock class. So you should be able to
> keep those managers happy by using/wrapping other mutex/lock classes.

I don't recognize that, is it documented somewhere?

> 
>> ... it would be nice if there was a basic subset 
>> of features that could be used without threading concerns.
> 
> There is. Much of this can be addressed by better docs, but there is still some
> level of flux in how the internals (including the types exposed to allow
> alternative implementations to be assembled) fit together, so detailed docs on
> the architecture might take a while to arrive. In the meantime:
> 

[snip]

> 3) Something quite radically different such as a log where the "stream" is
> something into which structured log information can be assembled, and
> the "string" carries that information to appenders that use that structured
> information (format it for textual output, write it to a database table...).

Is this actually possible? How?

// Johan