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Re: java still worthwhile?

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On Wed, 27 Feb 2019 15:36:30 +0100, Daniele Futtorovic wrote:

> On 2019-02-27 01:24, Martin Gregorie wrote:
>> Writing trace output to a circular buffer that only gets dumped at a
>> crash or fatal error is also good for long-running processes
> 
> Much agreed. Out of curiosity, how do you handle the trigger?

Its boringly straight-forward. I have a ReportError class that writes all 
tracing, warning and error messages to stderr. It also implements a trace 
level concept to make tracing verbosity controllable as well as turning 
tracing on or off for the current run. Trace level zero is no tracing. 
Increasing the trace level increases the amount of detail output. Since 
the first parameter of the various trace() methods is the trace level, a 
programmer can use the trace level as he sees fit to control what it 
traced. I usually use level 1 to trace top level method exit, level 2 
adds tracing top-level method entry and higher levels to add 
progressively more details (contents of local variables, nested method 
calls, etc.).
 
ReportError also has methods that enable a circular buffer and configure 
its size. Using them causes all trace() messages to be written to the 
buffer. Whenever ReportError warn() or error() methods are called the 
circular buffer contents are output immediately before the "Warning: xxxx" 
or "Error: xxxx" message. The only difference between the two (apart from 
the prefix) is that error() ends the run while warn() doesn't. 


-- 
Martin    | martin at
Gregorie  | gregorie dot org

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java still worthwhile? dale <dale@dalekelly.org> - 2019-02-26 17:25 -0500
  Re: java still worthwhile? dale <dale@dalekelly.org> - 2019-02-26 18:37 -0500
    Re: java still worthwhile? Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2019-02-27 15:36 +0100
      Re: java still worthwhile? Martin Gregorie <martin@mydomain.invalid> - 2019-02-27 20:33 +0000
        Re: java still worthwhile? Daniele Futtorovic <da.futt.news@laposte-dot-net.invalid> - 2019-02-28 23:16 +0100
          Re: java still worthwhile? Martin Gregorie <martin@mydomain.invalid> - 2019-02-28 23:24 +0000
  Re: java still worthwhile? Eric Sosman <esosman@comcast-dot-net.invalid> - 2019-02-27 07:28 -0500
    Re: java still worthwhile? dale <dale@dalekelly.org> - 2019-02-27 09:32 -0500
  Re: java still worthwhile? Eric Douglas <e.d.programmer@gmail.com> - 2019-02-27 05:18 -0800
    Re: java still worthwhile? dale <dale@dalekelly.org> - 2019-02-27 16:34 -0500
  Re: java still worthwhile? Joerg Meier <joergmmeier@arcor.de> - 2019-03-01 11:10 +0100
    Re: java still worthwhile? dale <dale@dalekelly.org> - 2019-03-01 10:11 -0500
      Re: java still worthwhile? Eric Douglas <e.d.programmer@gmail.com> - 2019-03-01 07:22 -0800
        Re: java still worthwhile? dale <dale@dalekelly.org> - 2019-03-01 13:34 -0500
      Re: java still worthwhile? Arne Vajhøj <arne@vajhoej.dk> - 2019-03-01 22:07 -0500
      Re: java still worthwhile? Joerg Meier <joergmmeier@arcor.de> - 2019-03-05 09:40 +0100
        Re: java still worthwhile? dale <dale@dalekelly.org> - 2019-03-05 09:33 -0500
  Re: java still worthwhile? Arne Vajhøj <arne@vajhoej.dk> - 2019-03-01 22:09 -0500

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