アカウントを永続化しようとすると、Null Pointer 例外が発生します。entityManager
がnullであることが判明しましたが、その理由はわかりません。関連するコードは次のとおりです。私はやろうとしました
package com.test.bank2.account;
import org.springframework.transaction.annotation.Transactional;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
@Transactional
public class AccountRepositoryImpl implements AccountRepository{
@PersistenceContext(unitName = "entityManagerFactory")
private EntityManager entityManager;
@Override
public void save(Account account) {
entityManager.persist(account);
}
}
そして設定:
<?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:jpa="http://www.springframework.org/schema/data/jpa"
xmlns:jdbc="http://www.springframework.org/schema/jdbc"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd
http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<jdbc:embedded-database id="dataSource">
<jdbc:script location="classpath:setup.sql"/>
</jdbc:embedded-database>
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="com.test.bank2" />
<property name="jpaPropertyMap">
<map>
<entry key="eclipselink.weaving" value="false"/>
<entry key="eclipselink.ddl-generation" value="create-tables"/>
<entry key="eclipselink.target-database" value="org.eclipse.persistence.platform.database.HSQLPlatform"/>
</map>
</property>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.EclipseLinkJpaVendorAdapter" >
<property name="databasePlatform" value="org.eclipse.persistence.platform.database.HSQLPlatform" />
<property name="generateDdl" value="true" />
</bean>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>