У меня используется c3p0 0.9.1.2, hibernate 3.2.1.ga и spring 2.5.5. Проблема в том, что соединение с базой данных не закрывается само по себе. Вот журналы:
[22 марта 2012 12: 29: 56,091] DEBUG com.mchange.v2.resourcepool.BasicResourcePool ["http-apr-8080" -exec-4] получить тест - пул уже исчерпан. [удалось: 20; максимум: 20]
[22 марта 2012 12: 29: 56,091] DEBUG com.mchange.v2.resourcepool.BasicResourcePool ["http-apr-8080" -exec-4] awaitAvailable (): com.mchange.v2.c3p0.impl.NewPooledConnection@15cc604
[22 марта 2012 12: 29: 56,091] DEBUG com.mchange.v2.resourcepool.BasicResourcePool ["http-apr-8080" -exec-4] трассировка com.mchange.v2.resourcepool.BasicResourcePool@6b0524 [управляемый: 20, не используется: 0, исключено: 0] (например, com.mchange.v2.c3p0.impl.NewPooledConnection@15cc604)
Вот конфигурация источника данных:
<!-- Local DataSource that works in any environment -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
<property name="driverClass" value="${database.driver}"/>
<property name="jdbcUrl" value="${database.url}"/>
<property name="user" value="${database.user}"/>
<property name="password" value="${database.password}"/>
<!--<property name="connectionCustomizerClassName" value="org.xxx.webapp.common.persistence.WatchConnectionCustomizer"/>-->
<property name="maxStatements" value="500"/>
<property name="maxIdleTime" value="1800"/>
<property name="maxPoolSize" value="100"/>
<property name="minPoolSize" value="2"/>
<property name="initialPoolSize" value="2"/>
<property name="acquireIncrement" value="3"/>
<property name="idleConnectionTestPeriod" value="3000"/>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" >
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.connection.autocommit">${hibernate.connection.autocommit}</prop>
<prop key="hibernate.transaction.auto_close_session">${hibernate.transaction.auto_close_session}</prop>
<prop key="hibernate.connection.release_mode">${hibernate.connection.release_mode}</prop>
<prop key="hibernate.bytecode.use_reflection_optimizer">${hibernate.bytecode.use_reflection_optimizer}</prop>
<prop key="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.region.factory_class">net.sf.ehcache.hibernate.EhCacheRegionFactory</prop>
</props>
</property>
<property name="annotatedClasses">
<list>
...
</list>
</property>
<property name="dataSource">
<ref bean="dataSource" />
</property>
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref bean="sessionFactory" />
</property>
</bean>
Вот наш общий Дао
public class GenericDAO<T, PK extends Serializable> extends HibernateDaoSupport
implements IGenericDAO<T, PK> {
private Class<T> clazz;
private Logger logger = Logger.getLogger(GenericDAO.class);
private static Session session;
public GenericDAO(Class<T> clazz) {
this.clazz = clazz;
}
public void refresh(T instanceToRefresh) throws DataAccessException {
getHibernateTemplate().refresh(instanceToRefresh);
//getCurrentSession().refresh(instanceToRefresh);
}
public void saveOrUpdate(T instanceToSaveOrUpdate)
throws DataAccessException {
//getCurrentSession().saveOrUpdate(instanceToSaveOrUpdate);
getHibernateTemplate().saveOrUpdate(instanceToSaveOrUpdate);
}
public void persist(T instanceToPersist) throws DataAccessException {
getHibernateTemplate().persist(instanceToPersist);
//getCurrentSession().persist(instanceToPersist);
}
@SuppressWarnings("unchecked")
public T merge(T instanceToMerge) throws DataAccessException {
T instanceMerged = (T) getHibernateTemplate().merge(instanceToMerge);
//T instanceMerged = (T) getCurrentSession().merge(instanceToMerge);
return instanceMerged;
}
@SuppressWarnings("unchecked")
public PK save(T newInstance) throws DataAccessException {
return (PK) getHibernateTemplate().save(newInstance);
//return (PK) getCurrentSession().save(newInstance);
}
public void delete(T persistentObject) throws DataAccessException {
getHibernateTemplate().delete(persistentObject);
//getCurrentSession().delete(persistentObject);
}
@SuppressWarnings("unchecked")
public T load(PK id) {
return (T) getHibernateTemplate().get(clazz, id);
//return (T) getCurrentSession().get(clazz, id);
}
public void update(T transientObject) throws DataAccessException {
//getCurrentSession().update(transientObject);
getHibernateTemplate().update(transientObject);
}
@SuppressWarnings("unchecked")
public List<T> loadAll() throws DataAccessException {
//Session session = this.getCurrentSession();
//return session.createQuery("from " + clazz.getName()).list();
return getHibernateTemplate().loadAll(clazz);
}
}
Заранее спасибо.