Logging library for mql4
This is a powerful addition to your MetaTrader 4 toolkit designed to optimize market analysis and performance. This library provides a collection of modular, reusable code. It is utilized by developers to organize common functions, allowing for the integration of complex logic across multiple Expert Advisors, indicators, or scripts without the need for code duplication.
How to Setup and Use Logging library for mql4
1. Storage: Place library files in the MQL/Libraries directory to ensure they are accessible to your projects.
2. Implementation: Include the library in your code using the #import directive, ensuring you match the exact function names and parameters.
3. Compilation: Ensure the library is present in the directory before you compile your main EA or script, as the compiler links them during this phase.
4. Management: Keep libraries organized in sub-folders if you manage many custom functions to maintain a clean project structure.
Frequently Asked Questions
Q: What is a library file used for? A: Libraries store reusable code modules, allowing you to centralize common logic used by multiple EAs or indicators.
Q: Is a library executable? A: No, libraries are non-executable files containing functions; they must be imported into an EA, indicator, or script to function.
Q: Can I update a library while the platform is running? A: You should compile your EA or script after updating a library to ensure the latest code changes are integrated.
Description & Settings
This is a logging library to quickly add logging capabilities to your code without much hassle. The library's default behavior matches most cases however most of the functionality can be customized using pre-processor substitutions (#define)
See the example scripts on how to use library.
How to use
Customization notes
The logger uses following format to print logs sample output: 2021.06.08 17:35:34 | Error | OnStart | This is a test error | invalid function parameter value
Use following logging functions/digits to assign them to logging levels. define as 0 if the level needs to be disabled
example:
Customize the prefix section as follows an example prefix output will be : with_customization.mq4 | Line:36
Customize file name by a string constant or a function call
Notes:
#define before the Logger.mqh is included.
To disable a logger level set the level as zero.
LOGGER_NOTIFY and LOGGER_FILE execution errors are handled as a print statements. Do not customize it to use library's own error handling, the program might trigger an infinite loop or a stack overflow.
