我知道这已经被多次询问了(已经在这里和其他网站上发布了大部分帖子),但我没有解决我的问题。
我的设置是:jpa 2 + hibernate 4 + spring 4 + primefaces + jboss eap 7
问题:我有一个懒惰的集合到另一个bean,但当我在bean上调用.size()方法时,它会抛出" LazyInitializationException:无法懒惰地初始化一个角色集合:com .pe.controlLines.data.model.Activity.activityRisks,无法初始化代理 - 没有会话"
我确定在LazyInitializationException Within a @Transactional Method和http://blog.timmattison.com/archives/2012/04/19/tips-for-debugging-springs-transactional-annotation/之后我有一个有效的交易,所以我100%确定当时正在运行的交易。
我的实体声明:
@Entity
public class Company {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long companyId;
@Column
private String name;
@OneToOne(cascade={CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.MERGE})
private Activity companieActivities;
@OneToMany
private Collection<SourceSupervision> sourceSupervisions;
和嵌套类
@Entity
@Indexed
public class Activity {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long activityId;
@ManyToOne
@JoinColumn(name="parentActivityId")
private Activity parent;
@Column
@Field(index = Index.YES, analyze = Analyze.YES, store = Store.NO)
@Analyzer(definition = "searchtokenanalyzer")
private String name;
@Column
@Field(index = Index.YES, analyze = Analyze.YES, store = Store.NO)
@Analyzer(definition = "searchtokenanalyzer")
private String description;
@OneToMany(cascade={CascadeType.PERSIST, CascadeType.REFRESH})
private Collection<ActivityRisk> activityRisks = new ArrayList<ActivityRisk>();
@ManyToMany(cascade={CascadeType.PERSIST, CascadeType.REFRESH})
private Collection<Word> words;
@ManyToMany
private Collection<Rol> rolesForActivity;
bussines delegate是这样的anotated(从页面控制器调用bussines):
@Component
@Scope("session")
@Transactional
public class SystemConfigurationBussinesDelegate {
对实体的引用进行了实际操作,执行正常。 (这是来自aboce班)
private Company currentCompany;
private Risk currentRisk;
@PostConstruct
public void init(){
//((WordDAO)wordDAO).startIndexer();
currentCompany = genericDAO.get(Company.class, 1l);
}
但是在这个方法中
public List<Danger> getDangers(){
List<Danger> returnValue = new ArrayList<Danger>();
System.out.println(TransactionSynchronizationManager.isActualTransactionActive());
Hibernate.initialize(currentCompany.getCompanieActivities());
currentCompany.getCompanieActivities().getActivityRisks().size();
for( ActivityRisk aRisk : currentCompany.getCompanieActivities().getActivityRisks() ){
Risk risk = aRisk.getRisk();
if(risk == currentRisk){
returnValue = new ArrayList<Danger>(aRisk.getDangers());
}
}
return returnValue;
}
sysout返回true,因此事务处于活动状态,我可以看到与数据库的打开连接,Hibernate.inicialize工作正常,以及对currentCompany.getCompanieActivities()的调用.getActivityRisks()。size();抛出异常。
上下文或某些类似内容会出现问题吗?
我的弹簧配置:
<?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:context="http://www.springframework.org/schema/context"
xmlns:security="http://www.springframework.org/schema/security"
xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:util="http://www.springframework.org/schema/util"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:jee="http://www.springframework.org/schema/jee"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util-2.5.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc.xsd
http://www.springframework.org/schema/jee
http://www.springframework.org/schema/jee/spring-jee.xsd">
<context:component-scan base-package="com.pe.controlLines" />
<context:annotation-config />
<context:spring-configured />
<aop:aspectj-autoproxy proxy-target-class="true"/>
<jee:jndi-lookup id="myDataSource" jndi-name="java:/ControllinesDS"/>
<!-- Data Source Declaration -->
<!-- Session Factory Declaration <bean id="SessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> -->
<!-- Session Factory Declaration -->
<bean id="SessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="myDataSource" />
<!-- <property name="packagesToScan">
<list>
<value>net.javabeat.spring.model</value>
</list>
</property>
<property name="annotatedClasses">
<list>
<value>co.com.testTalos.model.Storage</value>
<value>co.com.testTalos.model.Buyer</value>
<value>co.com.testTalos.model.Preferences</value>
</list>
</property>-->
<property name="packagesToScan">
<list>
<value>com.pe.controlLines.data.model</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.search.default.directory_provider">filesystem</prop>
<prop key="hibernate.search.default.indexBase">C:/DEVELOPMENT/lucene/indexes</prop>
</props>
</property>
</bean>
<!-- Enable the configuration of transactional behavior based on annotations -->
<tx:annotation-driven transaction-manager="txManager"/>
<!-- Transaction Manager is defined -->
<bean id="txManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="SessionFactory"/>
</bean>
</beans>
答案 0 :(得分:5)
我认为您的问题与调用@PostConstruct
中的事务方法有关。通过设计,弹簧tx方面在postconstruct方法上/可能不活动,因为并非所有bean都保证已经完成构建。尝试搜索这个主题,我记得也遇到了这个惊喜,但有很多有用的文章。
从那时起,当我需要在postconstruct上使用tx时,我喜欢的替代方法是使用编程事务(参见Spring TransactionTemplate模式)使用ContextRefreshedEvent。见下面的例子:
@Service
public class MyService implements ApplicationListener<ContextRefreshedEvent> {
public void onApplicationEvent(ContextRefreshedEvent event) {
// This method will be executed at context startup or refresh
// It is guaranteed all beans have finish constructing, hence
// AOP tx is available
}
...
}