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我刚从 Heroku 上的 Spring 应用程序开始。到目前为止，一切似乎都运行良好，但我无法向数据库添加任何内容。我不确定是否需要更改 Heroku 的 WebInterface 或我的配置文件中的任何内容？

我可以连接到我的数据库并且我的查询也可以工作（虽然没有异常），但是查询的结果是空的。

如果我addBooking()从服务中调用，新的预订不会被写入数据库（据我所知）。查询中getAvailableBookings()没有任何条目。

也许你会发现任何错误或者我错过了什么？

我的服务实现：

import java.util.Date;
import java.util.logging.Logger;

import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Root;

import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.stuttgart.fahrrad.controller.BookingController;
import org.stuttgart.fahrrad.model.Booking;

import com.example.model.Person;

@Service
public class BookingServiceImpl implements BookingService {

    static Logger logger = Logger.getLogger(BookingServiceImpl.class.getName());

    @PersistenceContext
    EntityManager em;

    @Override
    public void addBooking(Booking booking) {

        logger.info("Persisting a booking to the DB!");

        em.persist(booking);
    }

    @Override
    @Transactional
    public int getAvailableBookings(Date bookingDay) {
        CriteriaQuery<Booking> c = em.getCriteriaBuilder().createQuery(Booking.class);
        Root<Booking> from = c.from(Booking.class);
        return em.createQuery(c).getResultList().size();
    }

我的应用程序上下文：

<?xml  version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:jdbc="http://www.springframework.org/schema/jdbc"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
                           http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
                           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
                           http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <context:annotation-config />
    <context:component-scan base-package="org.stuttgart.fahrrad" />

    <mvc:annotation-driven/>

    <bean id="jspViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
    </bean>

    <tx:annotation-driven />
    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="entityManagerFactory" ref="entityManagerFactory" />
        <property name="dataSource" ref="dataSource"/>

    </bean>

    <beans profile="default">
        <jdbc:embedded-database id="dataSource"/>        
        <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            <property name="jpaVendorAdapter">
                <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
            </property>
            <property name="jpaProperties">
                <props>
                    <prop key="hibernate.dialect">org.hibernate.dialect.HSQLDialect</prop>
                    <prop key="hibernate.hbm2ddl.auto">create</prop>
                </props>
            </property>
        </bean>
    </beans>

    <beans profile="prod">
        <bean class="java.net.URI" id="dbUrl">
            <constructor-arg value="#{systemEnvironment['DATABASE_URL']}"/>
        </bean>

        <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
            <property name="url" value="#{ 'jdbc:postgresql://' + @dbUrl.getHost() + @dbUrl.getPath() }"/>
            <property name="username" value="#{ @dbUrl.getUserInfo().split(':')[0] }"/>
            <property name="password" value="#{ @dbUrl.getUserInfo().split(':')[1] }"/>
        </bean>

        <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
            <property name="dataSource" ref="dataSource"/>
            <property name="jpaVendorAdapter">
                <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
            </property>
            <property name="jpaProperties">
                <props>
                    <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
                    <prop key="hibernate.show_sql">true</prop>
                    <!-- change this to 'verify' before running as a production app -->
                    <prop key="hibernate.hbm2ddl.auto">update</prop>
                </props>
            </property>
        </bean>
    </beans>

</beans>
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1 回答 1

1

您还没有@Transactional申请到您的 addBooking 方法。

于 2013-01-19T11:02:01.263 回答