如何在应用程序启动时初始化 c3po 连接池？

Question

c3p0 connection pool initialize when I perform some JPA operation, it takes 2 seconds to initialize.

    <property name="hibernate.c3p0.min_size">10</property>
    <property name="hibernate.c3p0.max_size">30</property>
    <property name="hibernate.c3p0.timeout">300</property>
    <property name="hibernate.c3p0.idle_test_period">150</property>
    <property name="hibernate.c3p0.max_statements">50</property>
    <property name="hibernate.c3p0.privilegeSpawnedThreads">true</property>
    <property name="hibernate.temp.use_jdbc_metadata_defaults">false</property>  

So is there a way to do it on application launch?

Answer 1

Perform an operation on application startup.

If your c3p0 DataSource is called myPool , then myPool.getConnection().close() is sufficient.