RFR (L): 8046148: JEP 158 Unified JVM Logging

[Chris Newland]

Rather than decorating the values, would it be so bad to print empty
brackets [] when a log field is ommitted?

Wastes 2 chars per ommitted field but reduces ambiguity and simplifies
parsing?

-Chris

On Tue, September 15, 2015 13:46, Staffan Larsen wrote:
>

> Some way of differentiating the tid and pid decorations would be good.
> Even if you specify them in a different order on the command line, they
> will always show up in the same order which can be even more confusing.
>
> Maybe prefix them with ‘p’ and ’t’:
>
>
> [2015-09-15T10:08:40.407-0100][0.203s][p91539][t4867][info   ][logging]
> Log configuration fully initialized.
>
>
> Or postfix:
>
>
> [2015-09-15T10:08:40.407-0100][0.203s][91539p][4867t][info   ][logging]
> Log configuration fully initialized.
>
>
> Or label (but this is getting verbose):
>
>
> [2015-09-15T10:08:40.407-0100][0.203s][pid=91539][tid=4867][info
> ][logging] Log configuration fully initialized.
>
>
> Other ideas?
>
>
>
>
>> On 15 sep 2015, at 14:27, Staffan Larsen <staffan.larsen at oracle.com>
>> wrote:
>>
>>
>>
>>> On 15 sep 2015, at 14:20, Kirk Pepperdine <kirk at kodewerk.com> wrote:
>>>
>>>
>>>
>>>>
>>>> Just for completeness: there can be more than 3 bracket pairs if
>>>> you configure additional decorations:
>>>>
>>>> $ java -Xlog:all::uptime,time,pid,tid,level,tags Hello
>>>> [2015-09-15T10:08:40.407-0100][0.203s][91539][4867][info
>>>> ][logging] Log configuration fully initialized.
>>>>
>>>
>>> Are there a finite number of decorations? Is the order fixed or how
>>> would one tell the diff between pid and tid?
>>
>> May I refer to the JEP:
>>
>>
>> ------------
>> Decorations
>>
>>
>> Logging messages are decorated with information about the message. Here
>> is a list of the possible decorations:
>>
>> • time -- Current time and date in ISO-8601 format • uptime -- Time
>> since the start of the JVM in seconds and milliseconds (e.g., 6.567s)
>> • timemillis -- The same value as generated by
>> System.currentTimeMillis()
>> • uptimemillis -- Milliseconds since the JVM started • timenanos --
>> The same value as generated by System.nanoTime()
>> • uptimenanos -- Nanoseconds since the JVM started • pid -- The
>> process identifier • tid -- The thread identifier • level -- The
>> level associated with the log message • tags -- The tag-set associated
>> with the log message Each output can be configured to use a custom set
>> of decorators. The order of them is always the one above though. The
>> decorations to be used can be configured by the user in runtime.
>> Decorations will be prepended to the log message
>>
>>
>> Example: [6.567s][info][gc,old] Old collection complete
>>
>>
>> ------------
>>
>>
>>
>
>