Log4j introductionlearning manual
Published on 2023-04-20 00:10:05 · 中文 · بالعربية · Español · हिंदीName · 日本語 · Русский язык · 中文繁體
Log4j tutorials are designed for both beginners and professionals. Our tutorials provide all the basic and advanced concepts of Log4j, such as Log4j installation, Log4j architecture, Log4j configuration, and more.
Log4j is a fast, reliable, and flexible logging framework written in Java. It is an open source logging API for Java.
Simple logging implies some way to indicate the state of the system at runtime. Logs are used to capture and persist important data and make it ready for analysis.
Log4j introduction
Logging
Logging is a program that is a powerful auxiliary tool for understanding and debugging runtime behavior. Simple logging implies some way to indicate the state of the system at run time. Logs are used to capture and preserve important data and make it readily available for analysis.
Good logging requires three things:
Log messages must provide the information needed to understand what the application is doing internally.
Writing log messages must be as efficient as possible so as not to affect the performance of the application.
You need to be able to adjust log details for different deployment environments and situations
Benefits of logging
Almost all software development projects can be run on a proper and strict schedule. Logging for applications can provide the following benefits:
Quick debugging: Once we diagnose the problem, we know exactly how to fix it. Well-planned and well-written logging code reduces the overall cost of debugging your application.
Problem diagnosis: No matter how well our code is written, there may be some hidden problems inside. If you look at the logging process, then we will be able to detect problems accurately and quickly.
Easy to maintain: Applications with useful logging capabilities are easy to debug and, therefore, easy to maintain.
Cost and time savings: Well-written logging code provides fast debugging and easy maintenance. It makes installation, routine maintenance, maintenance and commissioning more cost-effective and time-efficient.
Disadvantages of logging
The following drawbacks can occur with any logging process:
Logging adds runtime overhead due to the generation of log information and the device input/output (I/O) associated with publishing log information.
Logging includes programming overhead because of the additional code required to generate log information. The logging process increases the size of the code.
Incorrectly generated log information can cause confusion.
Using error codes for logging can severely impact the performance of your application.
Last but not least, logging requires advance planning because it is difficult to add logging code later in development.
Various logging frameworks such as SLF4J and Log4J are available in Java. Apache Log4j is a very popular and ancient logging framework. It is a reliable, flexible, and fast logging framework or API written in Java and developed in early 1996. It is distributed under the Apache Software License. Log4J has been ported to Python, Perl, and C, C++, C#, Ruby, and Eiffel languages. This tool is used for small to large Selenium automation projects.
Log4j looks at the logging process by priority level and provides mechanisms to direct logging information to various destinations, such as consoles, databases, files, UNIX syslogs, and so on.