What is tinylog?
Tinylog is a lightweight and Simplified logging framework for so many JVM languages. It has static logger. No need to create any other logger instance per class.
Like any other standard logging framework (log4j) it also supports 5 different logging levels.
- TRACE
- DEBUG
- INFO – Default
- WARNING
- ERROR
Have your logging level to trace to enable all logging.
What all frameworks tinylog supports:
- Java
- Kotlin
- Scala
- other JVM language
What are the main advantages of tinylog logging framework?
- It’s lightweight (~170kb lib)
- It’s faster
- It’s very simple to implement.
- It follows standard log4j patterns
- It’s opensource
Let’s get started on coding and sample HelloWorld Example
Step-1
- Add tinylog maven dependencies to your project’s pom.xml file.
Open your production project’s pom.xml file and add below two dependencies.
<dependency>
<groupId>org.tinylog</groupId>
<artifactId>tinylog-api</artifactId>
<version>2.3.2</version>
</dependency>
<dependency>
<groupId>org.tinylog</groupId>
<artifactId>tinylog-impl</artifactId>
<version>2.3.2</version>
</dependency>
Rebuild the project.
Step-2
- Add tinylog.properties under /resources folder.
- File: tinylog.properties
# logs to Console
writerCrunchifyConsole = console
writerCrunchifyConsole.format = {date: HH:mm:ss.SSS} {level}: {message}
writerCrunchifyConsole.level = trace
# logs to File
writerCrunchifyFile = file
writerCrunchifyFile.file = crunchifyLog.txt
writerCrunchifyFile.level = trace
Here we have two tinylog adaptors.
- tinylog
consoleadaptor- This prints log in Eclipse / IntelliJ IDEA console
- tinylog
fileadaptor- This prints log in crunchifyLog.txt file
Step-3
- Create class CrunchifyTinyLogFirstTutorial.java
package crunchify.com.java.tutorials;
import org.tinylog.Logger;
/**
* @author Crunchify.com
* Program: tinylog Hello World Tutorial with log levels and properties
*
*/
public class CrunchifyTinyLogFirstTutorial {
public static void main(String[] args) {
// Logs a message at INFO level.
Logger.info("Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - INFO Log Level");
// Logs a message at TRACE level.
Logger.trace("Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - TRACE Log Level!");
// Logs a message at DEBUG level.
Logger.debug("Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - DEBUG Log Level!");
// Logs a message at WARN level.
Logger.warn("Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - WARN Log Level!");
// Logs a message at ERROR level.
Logger.error("Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - ERROR Log Level!");
String crunchifyString = "Cruncher";
Logger.info("Howdy {}! This is Tinylog tutorial by {}.", crunchifyString, "Crunchify.com");
Logger.error("Oh.. This is not {} but it's {}", "Meta.com", "Crunchify.com");
}
}
Copy above code and save file.
Step-4
Run above program as Java Application and you will see result as below.
/Users/app/Library/Java/JavaVirtualMachines/openjdk-17.0.1/Contents/Home/bin/java -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=60075:/Applications/ crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial 13:21:52.998 INFO: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - INFO Log Level 13:21:53.001 TRACE: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - TRACE Log Level! 13:21:53.002 DEBUG: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - DEBUG Log Level! 13:21:53.002 INFO: Howdy Cruncher! This is Tinylog tutorial by Crunchify.com. 13:21:53.002 WARN: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - WARN Log Level! 13:21:53.002 ERROR: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - ERROR Log Level! 13:21:53.002 ERROR: Oh.. This is not Meta.com but it's Crunchify.com Process finished with exit code 0
What all are the logging format you can use with tinylog?
| Name | Description |
|---|---|
| CLASS | Fully-qualified class name where the logging request is issued |
| CLASS_NAME | Class name (without package) where the logging request is issued |
| CONTEXT | All set values from logging context (new in tinylog 1.1) |
| DATE | Date and time of the logging request |
| EXCEPTION | Thrown exception (null, if none has been thrown) |
| FILE | Filename of the Java source file from where the logging request is issued |
| LEVEL | Logging level of the created log entry |
| LINE | Line number from where the logging request is issued |
| MESSAGE | Associated message of the created log entry |
| METHOD | Method name from where the logging request is issued |
| PACKAGE | Package where the logging request is issued |
| PROCESS_ID | Process ID of the application |
| RENDERED_LOG_ENTRY | Final rendered log entry as it would be used for text based outputs |
| THREAD_ID | ID of the current thread |
| THREAD_NAME | Name of the current thread |
How many writers you could use with tinylog?
| Writer | Name | Description |
|---|---|---|
| ConsoleWriter | console | Writes log entries to the console |
| FileWriter | file | Writes log entries to a defined file |
| JdbcWriter | jdbc | Stores log entries in a SQL database |
| LogcatWriter | logcat | Forwards log entries to Android’s native logging system |
| RollingFileWriter | rollingfile | Like FileWriter but uses multiple files by rotating them |
| SharedFileWriter | sharedfile | Supports writing of multiple instances of a program to the same file |
| null | null | Discards all log entries |
Log without tinylog.properties file
For reference, here is a log if you don’t have any logging framework enabled for your application.
/Users/app/Library/Java/JavaVirtualMachines/openjdk-17.0.1/Contents/Home/bin/java -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=60075:/Applications/ crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial 2021-11-08 13:28:30 [main] crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial.main() INFO: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - INFO Log Level 2021-11-08 13:28:30 [main] crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial.main() TRACE: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - TRACE Log Level! 2021-11-08 13:28:30 [main] crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial.main() DEBUG: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - DEBUG Log Level! 2021-11-08 13:28:30 [main] crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial.main() INFO: Howdy Cruncher! This is Tinylog tutorial by Crunchify.com. 2021-11-08 13:28:30 [main] crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial.main() WARN: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - WARN Log Level! 2021-11-08 13:28:30 [main] crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial.main() ERROR: Howdy Cruncher! This is App Shah and welcome to Tinylog Tutorial! - ERROR Log Level! 2021-11-08 13:28:30 [main] crunchify.com.java.tutorials.CrunchifyTinyLogFirstTutorial.main() ERROR: Oh.. This is not Meta.com but it's Crunchify.com Process finished with exit code 0
And you are all set. Let me know if you face any issue running this tinylog tutorial.
The post tinylog – Lightweight, Simplified logging framework for Java. HelloWorld tutorial and Logging Level details appeared first on Crunchify.
0 Commentaires