QLogExplorer

Advanced tool for exploring log files.

Main features

Very fast and can handle huge files

The file is not loaded into memory, but indexed by chunks. It allows a very fast loading, as well as low memory consumption, even when a large file is opened.
QLogExplorer also allows to browser the file and to start searching even when the file is still being indexed.

No locks whatsoever

A monitoring applications shall never interfere with the process that is generating/managing the logs, therefore the process must be able to delete, move or compress the log files without getting any denied operation due the monitoring application is reading it.
QLogExplorer never interferes in the log management process.

Supports JSON log files

Nowadays it's very common log files to be in JSON format as follow:

{"LogLevel":"INFO","DateTime":"28-12-2021 18:03:54.00274","LogMessage":"System initialized"}
{"LogLevel":"WARNING","DateTime":"28-12-2021 18:03:54.00301","LogMessage":"Not in UTC"}
{"LogLevel":"ERROR","DateTime":"28-12-2021 18:03:56.00885","LogMessage":"Exception caught"}

QLogExplorer completely supports that kind of log format.

See wiki for further information

Templates

Different systems may have different kind of log info, so a template can be created for each kind of log, having:

• Columns definition.
• Highlighters definition.
• Predefined search parameters.

See wiki for further information

Advanced search

The search allows multi-parameters where the parameters can be combined by AND or OR operators.
Each parameter can:

• Have the search expression as SubString, Regex or Range.
• Be limited to a specific column.
• Use the negation operator.

See wiki for further information

Build

Minimum requirements

• C++ 17
• CMake 3.10
• Qt 5.12

If not using Qt creator, make sure the Qt dir is in the PATH.
To build the project via command line:

mkdir build
cd build
cmake ../
make