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All Projects → Mokolea → Simpleqtlogger

Mokolea / Simpleqtlogger

Licence: lgpl-2.1
Simple rolling file logger for Qt.

Labels

qtqt5logging-library

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SimpleQtLogger Build Status

Simple rolling file logger for C++ applications using the Qt Framework.

Release License

Design goals - simple

  • straightforward usage
  • single source-file
  • no configuration-file

Facts

  • supported sinks:
    • rolling file appender
    • console, colored (ANSI escape codes)
    • qDebug
    • signal (forwarding)
    • syslog (Linux only)
  • log-levels, function-log (stack-trace)
  • log-filters using regular expressions (needs Qt 5.0)
  • thread-safe use of log-macros
  • specify log-format
  • log-file encoding: utf-8

Usage

Just see the comments in simpleQtLogger.h and the examples.

Log-format

The following TAGs are available and expand to:

TAG Description
<TS> Time-stamp, "YYYY-MM-DD HH:MM:SS.SSS"
<TID> Thread-Id, 64bit value in hexadecimal
<TID32> Thread-Id, 32bit value in hexadecimal
<LL> Log-level, one character: '!', 'E', 'W', 'N', 'I', 'D' or 'F'
<TEXT> The log-message
<FUNC> Function-name
<FILE> File-name
<LINE> Line-number

Using the default log-format "<TS> [<TID>] [<LL>] <TEXT> (<FUNC>@<FILE>:<LINE>)" creates log-entries like:

2015-10-05 17:27:26.022 [000070000019a000] [I] 03: Calculate: 6! = 720 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:119)

Example log-file content:

Marios-iMac:Qt mario$ tail -Fn100 testSimpleQtLogger.log
2015-10-05 17:27:22.630 [00007fff7c63d000] [-] Start file-log 'main'
2015-10-05 17:27:22.631 [00007fff7c63d000] [F] \ ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:22)
2015-10-05 17:27:22.631 [00007fff7c63d000] [F] / ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:22)
2015-10-05 17:27:22.631 [00007fff7c63d000] [F] \ ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:34)
2015-10-05 17:27:22.631 [00007fff7c63d000] [I] +++ test Logger ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:36)
2015-10-05 17:27:22.631 [00007fff7c63d000] [!] L_FATAL ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:37)
2015-10-05 17:27:22.631 [00007fff7c63d000] [E] L_ERROR ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:38)
2015-10-05 17:27:22.632 [00007fff7c63d000] [W] L_WARN ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:39)
2015-10-05 17:27:22.632 [00007fff7c63d000] [I] L_INFO ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:40)
2015-10-05 17:27:22.632 [00007fff7c63d000] [I] --- test Logger ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:42)
2015-10-05 17:27:22.632 [00007fff7c63d000] [I] ? ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:44)
2015-10-05 17:27:22.632 [00007fff7c63d000] [I] Trimmed ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:45)
2015-10-05 17:27:22.632 [00007fff7c63d000] [I] UTF-8 Unicode text: äöü àéè ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:46)
2015-10-05 17:27:22.632 [00007fff7c63d000] [I] JSON output 1:
{
  "firstName": "Mario",
  "age": 44
} ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:54)
2015-10-05 17:27:22.632 [00007fff7c63d000] [I] JSON output 2:
{
  "firstName": "Mario",
  "age": 44
} ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:57)
2015-10-05 17:27:22.632 [00007fff7c63d000] [F] / ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:34)
2015-10-05 17:27:25.520 [00007fff7c63d000] [F] \ ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:74)
2015-10-05 17:27:25.520 [00007fff7c63d000] [F] .\ id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:88)
2015-10-05 17:27:25.520 [00007fff7c63d000] [F] ..\ _id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:102)
2015-10-05 17:27:25.520 [00007fff7c63d000] [F] ../ _id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:102)
2015-10-05 17:27:25.520 [00007fff7c63d000] [F] ./ id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:88)
2015-10-05 17:27:25.520 [00007fff7c63d000] [F] / ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:74)
2015-10-05 17:27:25.520 [000070000019a000] [F] \ _id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:114)
2015-10-05 17:27:26.022 [000070000019a000] [F] .\ n=6 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] ..\ n=5 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] ...\ n=4 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] ....\ n=3 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] .....\ n=2 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] ...../ n=2 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] ..../ n=3 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] .../ n=4 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] ../ n=5 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [F] ./ n=6 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:131)
2015-10-05 17:27:26.022 [000070000019a000] [I] 03: Calculate: 6! = 720 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:119)
2015-10-05 17:27:26.530 [00007fff7c63d000] [F] \ ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:82)
2015-10-05 17:27:26.530 [00007fff7c63d000] [I] WorkerThread: 03: Calculate: 6! = 720 ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:83)
2015-10-05 17:27:26.530 [00007fff7c63d000] [F] / ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:82)
2015-10-05 17:27:26.530 [000070000019a000] [F] / _id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:114)
2015-10-05 17:27:26.530 [00007fff7c63d000] [F] \ _id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:108)
2015-10-05 17:27:26.530 [00007fff7c63d000] [F] / _id='03' ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:108)
2015-10-05 17:27:27.883 [00007fff7c63d000] [-] Current log-file 'main' size=11964 (rotation-size=10000) --> rolling
2015-10-05 17:27:27.898 [00007fff7c63d000] [-] Log-file 'main' rolling done (time elapsed: 15 ms)
2015-10-05 17:27:28.935 [00007fff7c63d000] [F] \ ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:67)
2015-10-05 17:27:28.935 [00007fff7c63d000] [I] Bye bye ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:68)
2015-10-05 17:27:28.936 [00007fff7c63d000] [F] / ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:67)
2015-10-05 17:27:28.936 [00007fff7c63d000] [F] \ ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:28)
2015-10-05 17:27:28.936 [00007fff7c63d000] [F] / ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:28)
Marios-iMac:Qt mario$

Marios-iMac:Qt mario$ tail -Fn100 testSimpleQtLoggerWarn.log
2015-10-05 17:27:22.631 [00007fff7c63d000] [-] Start file-log 'warn'
2015-10-05 17:27:22.631 [00007fff7c63d000] [!] L_FATAL ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:37)
2015-10-05 17:27:22.631 [00007fff7c63d000] [E] L_ERROR ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:38)
2015-10-05 17:27:22.632 [00007fff7c63d000] [W] L_WARN ([email protected]/SimpleQtLogger/examples/TestSimpleQtLogger/task.cpp:39)
Marios-iMac:Qt mario$

GNU Lesser General Public License v2.1

-- Mario

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