Java properties file in php

What are Semaphores? Learn Log4j2 setup with configuration in Properties file for logging in Java Application in this tutorial.

Log4j2 with Properties configuration file provides a simple way of setting up logging in your Java application. Apache Log4j2 is the new version of the log4j and is used for printing logs when used in a Java program.

In this tutorial we will setup a Maven project and use log4j2 to print logs from a simple Java class. When asked for Group Id and Artifact Id , enter what you want, this will be used as name of the project and as package name for the Java project. To setup log4j2 for logging we will need log4j2 dependencies , which we will provide in our project's pom. Add the below code into your pom.

We will create a Properties file to define the basic configurations for log4j like which appender to use Console appender, File appender etc and other setting like Pattern, log level etc. Now we will create a Properties file with name log4j2. Now create a new file in this source folder with name log4j2.

In the above Properties file we have specified a Console appender with basic information like name and a pattern to be used for printing log events. Also, we have specified the default root logger , log level for it and we have provided the reference of the Console appender to it.

Once you are done with all this, right click on the main java class which is App. You should get the following output in console:. App - This is a Debug Message! App - This is an Info Message! App - And here comes the Error Message! RuntimeException: RunRunRun at com. To print logs in a file rather than printing on console, we will use File appender instead of Console appender in the Properties configuration file. Following is the Properties configuration to print logs in a file with name app.

As you can see that we have provided the filename and a pattern just like the console appender example above. Run the Java class again to check of the log file is getting created.

You can even run the Java class multiple times and the logs will be appended in the same file. Using a File appender and storing logs in a file helps in storing the logs for later analysis. But sometimes due to the amount of the logs being printed by an application the size of the log file can grow into MBs and even GBs , hence making it difficult for us to access and analyse the logs.

To solve this problem we can use the RollingFile Appender. In the above Properties configuration we have set the rolling file appender policy for size as 1 Kb just to show you how a file with old logs is created once the size exceeds 1 Kb. Ideally you should keep this value in MBs. The default file will be created with name app. R Programming. React Native. Python Design Patterns. Python Pillow. Python Turtle. Verbal Ability. Interview Questions. Company Questions.

Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design. Trejkaz Lame. OP needed a similar solution to a. Show 6 more comments. You can also use a PHP file containing an array to store data.

Example: config. John Slegers Rafael Sanches Rafael Sanches 1, 21 21 silver badges 28 28 bronze badges. The link says "Warning! Domain mapping upgrade for this domain not found. Please log in and go to the Domains Upgrades page of your blog to use this domain. Sander Versluys Sander Versluys 69k 23 23 gold badges 81 81 silver badges 89 89 bronze badges. Why is that? There is an example here : Configuration file example ex : config.

PatrickB PatrickB 31 4 4 bronze badges. That's a very clever way of doing it! Great job! Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Helping communities build their own LTE networks. Podcast Making Agile work for data science. Featured on Meta. New post summary designs on greatest hits now, everywhere else eventually.