JFR JDBC

A JDBC driver that wraps an other JDBC driver and generates JFR events.

<dependency>
  <groupId>com.github.marschall</groupId>
  <artifactId>jfr-jdbc</artifactId>
  <version>0.4.0</version>
</dependency>

Usage

Simply wrap your DataSource with a JfrDataSource

new JfrDataSource(dataSource)

If you use Driver simply prefix your JDBC URL with "jfr:" for example use "jdbc:jfr:h2:mem:" instead of "jdbc:h2:mem:".

The project is a Java module with the name com.github.marschall.jfr.jdbc.

Implementation/Overhead

The implementation is based around wrapper objects.

• no reflection
• no string concatenation

Caveats

• does not work with Oracle explicit statement caching
• does not work with unwrapped objects
• does not work with implicitly closed objects
• does not work with cached statements provided by a connection pool
• only accessing the first warning is instrumented, accessing the following ones is not
• reconstructing the JDBC call time and row count is not super reliable especially in the case for more exotic row iteration