C3p0 configuration file

Then each application thread that needs to access the database can request a connection from the pool and returns the same to the pool when all the database operations have been executed.

This mechanism is called connection pooling. Why do we use connection pooling? Different Types of Connection Pooling mechanism. C3P0 is an Open source connection pool that comes bundled with hibernate. How to configure c3p0 connection pool in Hibernate. Here is an example of configuring c3p0 connection pooling in hibernate using an XML file. We can also create a. This hibernate.

I hope this short tutorial is helpful to you. If you would like to learn more about hibernate check out the below books and video courses. Powered by Contextual Related Posts. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. To update our Java project that uses a default connection pool to use C3P0 there are 2 steps that we will need to do: Update pom. You also can set extra c3p0 properties using c3p0.

If this is a number greater than 0, c3p0 will test all idle, pooled but unchecked-out connections, every this number of seconds. The seconds a Connection can remain pooled but unused before being discarded.

Zero means idle connections never expire. The size of c3p0's PreparedStatement cache. Zero means statement caching is turned off. Maximum time in seconds before user configuration constraints are enforced. It is included for JDBC3 completeness. Determines how many connections at a time c3p0 will try to acquire when the pool is exhausted. Don't use it, this feature is very expensive.

If set to true, an operation will be performed at every connection checkout to verify that the connection is valid. A better choice is to verify connections periodically using c3p0.

The JDBC spec is unfortunately silent on what should happen to unresolved, pending transactions on Connection close. C3P0's default policy is to rollback any uncommitted, pending work.