Spring未在JBoss EAP 6上释放/重用Hibernate会话

我有一个使用Hibernate4的Spring应用程序。Hibernate配置位于my application-config.xml中，如下所示：

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
            <prop key="hibernate.show_sql">true</prop>
            <prop key="hibernate.hbm2ddl.auto">validate</prop>
        </props>
    </property>
    <property name="packagesToScan">
        <list>
            <value>com.mycompany.esb.jpa</value>
        </list>
    </property>
</bean>

下面是我为这个例子简化的一个类

package com.mycompany.esb.jpa.dao;

import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.springframework.stereotype.Component;

import com.mycompany.esb.jpa.entity.ServicesEntity;

@Component("servicesDAO")
public class ServicesDAOImpl extends HibernateBaseDAO implements ServicesDAO {

    @Override
    public List<ServicesEntity> getAllServices(double daysPrevious, double hoursToShow) {
        try {

            Query query = getSession().createQuery("FROM ServicesEntity e "
                    + "WHERE e.responseTime >= (sysdate - (" + daysPrevious + " + " + hoursToShow + "/24)) "
                    + "AND e.responseTime < (sysdate - " + daysPrevious + ") "
                    + "GROUP BY e.domainName, e.serviceName, e.operationName, e.elapsedTime, e.serviceTimestamp, "
                    + "e.id, e.responseTimeAverage, e.responseTime, e.requestSizeAverage, e.responseSizeAverage, e.requestCount "
                    + "ORDER BY e.domainName, e.serviceName, e.operationName, e.serviceTimestamp");

            @SuppressWarnings("unchecked")
            List<ServicesEntity> services = (List<ServicesEntity>) query.list();
            return services;

        } catch (HibernateException hex) {
            hex.printStackTrace();
        }
        return null;
    }
}

---

我遇到的问题是，当部署到JBoss EAP时，每次调用getAllServices方法时，它都会从JDBC池中获取一个新连接，并且永远不会释放它。因此，当容器JDBC池最多有5个连接时，在5次查询之后，后续查询会超时，因为没有可用的连接。连接池不应该由Hibernate SessionFactory对象管理吗？是否需要显式关闭连接

正如用户Orid最初指出的：他随后删除了他的答案

这是因为您调用sessionFactory.openSession；在…内 在基类中获取会话，并且从不释放会话和 通过调用close进行连接

您应该改用sessionFactory.getCurrentSession； 哪一个将会话固定到JTA事务/线程取决于您的 数据源事务资源管理配置

此外，还应使用注释对getAllServices进行注释 @TransactionalreadOnly=对于正确的事务和连接为true 获取/发布管理

我还必须将@EnableTransactionManagement注释添加到我的ServicesDAOImpl类中，并在JBoss EAP中启用CCM

因此，我的新ServicesDAOImpl类如下所示：

package com.mycompany.esb.jpa.dao;

import java.util.List;

import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.springframework.stereotype.Component;

import com.mycompany.esb.jpa.entity.ServicesEntity;


@EnableTransactionManagement
@Component("servicesDAO")
public class ServicesDAOImpl extends HibernateBaseDAO implements ServicesDAO {

    @SuppressWarnings("unchecked")
    @Transactional(readOnly=true)
    @Override
    public List<ServicesEntity> getAllServices(double daysPrevious, double hoursToShow) {
        Query query = getSession().createQuery("FROM ServicesEntity e "
                + "WHERE e.responseTime >= (sysdate - (" + daysPrevious + " + " + hoursToShow + "/24)) "
                + "AND e.responseTime < (sysdate - " + daysPrevious + ") "
                + "GROUP BY e.domainName, e.serviceName, e.operationName, e.elapsedTime, e.serviceTimestamp, "
                + "e.id, e.responseTimeAverage, e.responseTime, e.requestSizeAverage, e.responseSizeAverage, e.requestCount "
                + "ORDER BY e.domainName, e.serviceName, e.operationName, e.serviceTimestamp");
        try {
            return (List<ServicesEntity>) query.list();
        } catch (HibernateException hex) {
            hex.printStackTrace();
        }
        return null;
    }
}

package com.mycompany.esb.jpa.dao;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;

public abstract class HibernateBaseDAO {

    @Autowired
    protected SessionFactory sessionFactory;

    protected Session getSession() {
        return sessionFactory.getCurrentSession();
    }

}

---

为什么要这样做？您没有事务设置，在该设置旁边，您执行openSession，表示您希望管理自己的会话。设置事务并改用getCurrentSession。

package com.mycompany.esb.jpa.dao;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;

public abstract class HibernateBaseDAO {

    @Autowired
    protected SessionFactory sessionFactory;

    protected Session getSession() {
        return sessionFactory.getCurrentSession();
    }

}