By the end of this course, learners will be able to:

1. Understand the importance and purpose of logging in software development.
2. Learn the architecture and core components of the Apache Log4j framework.
3. Implement basic and advanced logging techniques in Java applications.
4. Configure Log4j properties and XML-based configurations for flexible logging.
5. Use different log levels (DEBUG, INFO, WARN, ERROR, FATAL) effectively.
6. Customize Appenders and Layouts to control output format and destination (console, file, database, etc.).
7. Explore Log4j2 enhancements like asynchronous logging, performance improvements, and plugins.
8. Handle logging in distributed applications and integrate with enterprise systems.
9. Apply best practices in logging for maintainable and secure Java applications.

Log4j – course curriculum

1. Introduction to Logging

• What is Logging
• Importance of Logging
• Logging Frameworks for JAVA

2. Introduction to Log4J

• What is Log4J?
• Why we need to use Log4J?
• Log4J Features
• Log4J Advantages

3. Log4J Setup for Java: Standalone and Web Applications

• Download Log4J
• log4J Jar file
• log4j properties

4. Log4J Development Approaches

• Programmatic
• Declarative

5. Log4J Programmatic Implementation

• Logger
• BasicConfiguror, PropertyConfigurator
• Setting Logging Level

6. Log4J Logging Levels

• Default Logging Level
• Available Logging Levels
  DEBUG, INFO, WARN, ERROR and FATAL

7. Log4J Declarative Implementation: log4j properties Configuration

• Set Debug Level
• Set Appender
• Set PatternLayout
• Set ConversionPattern

8. Log4J Appenders

• ConsoleAppender
• FileAppender
• AdminFileAppender
• ReportFileAppender
• Setting Single Appender
• Setting Multiple Appenders

9. Log4J Implementation with xml file

• log4j xml
• log4j:configuration
• Setting Appenders
• Setting Log Level
• Setting Conversion Pattern

10. Conversion Pattern Syntax

• TTCC
• TTCCLayout
• Time Elapsed
• Thread Information
• Logging Priority
• Logging Category
• NDC - Nested Diagnostic Context
• Application Message

Upon completing the Apache Log4j Essentials: Mastering Java Logging Frameworks course, learners will receive a Course Completion Certificate from Uplatz, demonstrating their expertise in implementing robust logging solutions using Log4j.

This certification enhances your technical portfolio and prepares you for Java development roles where proper logging is a critical skill, as well as supporting roles in DevOps, QA, and system monitoring.

Logging is a core skill for every backend developer and system maintainer. Mastering Apache Log4j can help you land roles such as:

1. Java Developer
2. Backend Software Engineer
3. QA Automation Engineer
4. DevOps Engineer
5. Site Reliability Engineer (SRE)
6. Application Support Specialist

Organizations across industries—from finance and telecom to retail and enterprise software—value developers who implement efficient, maintainable logging strategies.

1. What is Apache Log4j and why is it used?
Apache Log4j is a Java-based logging utility that helps developers log messages during the execution of applications. It supports flexible configuration and output destinations.

2. What are the main components of Log4j?
The core components include Loggers, Appenders, and Layouts. Loggers capture log messages, Appenders send them to destinations, and Layouts format the output.

3. What are the different logging levels in Log4j?
Log4j defines several levels: TRACE, DEBUG, INFO, WARN, ERROR, and FATAL, used to control what kind of messages get logged.

4. What’s the difference between Log4j 1.x and Log4j 2.x?Log4j 2 offers asynchronous logging, better performance, plugin support, and is built to address limitations and security issues in 1.x.

5. How do you configure Log4j?
You can configure Log4j using property files, XML, JSON, or YAML to define log levels, appenders, and layout settings.

6. What is an Appender in Log4j?
An Appender determines the output destination of the log messages, such as the console, a file, or a database.

7. What are Layouts in Log4j?
Layouts define the format of the logged messages (e.g., simple, pattern, or JSON format), helping structure logs for easier readability.

8. What is asynchronous logging and why is it useful?Asynchronous logging improves application performance by writing logs in a separate thread, preventing the logging system from slowing down application execution.

9. How does Log4j handle log rotation?
Log4j provides rolling file appenders that can rotate logs based on file size or time intervals, useful for managing log data.

10. Is Log4j secure?
Log4j 2 includes important security improvements over 1.x. It is essential to keep versions updated to avoid vulnerabilities like Log4Shell (CVE-2021-44228).

1. What is Apache Log4j?
Apache Log4j is a logging framework for Java applications that supports configurable, performant, and structured logging for development and production environments.

2. Who should take this course?
Java developers, QA engineers, DevOps professionals, and system integrators who need structured application logs for debugging, monitoring, or auditing.

3. Is this course beginner-friendly?
Yes, it starts with the basics and moves to advanced concepts, making it suitable for both beginners and experienced Java developers.

4. What is the format of the course?
Self-paced video training with hands-on examples, configuration demos, and logging implementation walkthroughs.

5. Will I receive a certificate?
Yes, you’ll receive a Course Completion Certificate from Uplatz after completing the training successfully.