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The log4j API provides the org.apache.log4j.jdbc.JDBCAppender object, which can put logging information in a specified database.
In this example you will see how to create a console and file appender and add it to the rootLogger. The log4j.properties file is shown below. Dayz standalone free download mac.
JDBCAppender Configuration
| Property | Description |
|---|---|
| bufferSize | Sets the buffer size. Default size is 1. |
| driver | Sets the driver class to the specified string. If no driver class is specified, it defaults to sun.jdbc.odbc.JdbcOdbcDriver. |
| layout | Sets the layout to be used. Default layout is org.apache.log4j.PatternLayout. |
| password | Sets the database password. |
| sql | Specifies the SQL statement to be executed every time a logging event occurs. This could be INSERT, UPDATE, or DELETE. |
| URL | Sets the JDBC URL. |
| user | Sets the database user name. |
Log Table Configuration
Before you start using JDBC based logging, you should create a table to maintain all the log information. Following is the SQL Statement for creating the LOGS table −
Sample Configuration File
Following is a sample configuration file log4j.properties for JDBCAppender which will is be used to log messages to a LOGS table.
https://quaemalenpi.tistory.com/3. For MySQL database, you would have to use the actual DBNAME, user ID and password, where you have created LOGS table. The SQL statement is to execute an INSERT statement with the table name LOGS and the values to be entered into the table.
JDBCAppender does not need a layout to be defined explicitly. Instead, the SQL statement passed to it uses a PatternLayout.
Flexlm license manager cadence. If you wish to have an XML configuration file equivalent to the above log4j.properties file, then here is the content −
Sample Program
The following Java class is a very simple example that initializes and then uses the Log4J logging library for Java applications.
Compile and Execute
Log4j Appender Class 1
Here are the steps to compile and run the above-mentioned program. Make sure you have set PATH and CLASSPATH appropriately before proceeding for compilation and execution.
All the libraries should be available in CLASSPATH and your log4j.properties file should be available in PATH. Follow the given steps −
Log4j Consoleappender Class
- Create log4j.properties as shown above.
- Create log4jExample.java as shown above and compile it.
- Execute log4jExample binary to run the program.
Now check your LOGS table inside DBNAME database and you would find the following entries −
Log4j2 Appender Class Name
Note − Here x is used to output the Nested diagnostic Context (NDC) associated with the thread that generated the logging event. We use NDC to distinguish clients in server-side components handling multiple clients. Check Log4J Manual for more information on this.