如何从customRevisionEntity检索用户名

Question

我们正在使用Hibernate-envers 3.6.3.Final,我正在使用@Audited注释正确生成表.我使用CustomRevisionEntity存储用户信息,CustomRevisionListenner也存储用户信息.但是,如果我尝试检索"用户名",它将返回以下错误.

org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
    at org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:64) ~[spring-orm-3.2.6.RELEASE.jar:3.2.6.RELEASE]

我的CustomRevisionEntity类,

@Entity
@Table(name = "revision_info")
@RevisionEntity(CustomEnversListener.class)
public class CustomRevisionEntity implements Serializable {

    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue
    @RevisionNumber
    private int id;

    @RevisionTimestamp
    private long timestamp;

    private String username;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public long getTimestamp() {
        return timestamp;
    }

    public void setTimestamp(long timestamp) {
        this.timestamp = timestamp;
    }

    @Column(name = "username")
    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

CustomRevisionListener.java

public class CustomEnversListener implements RevisionListener {
    public void newRevision(Object revisionEntity) {
        CustomRevisionEntity customRevisionEntity = (CustomRevisionEntity) revisionEntity;
        Authentication authentication = SecurityContextHolder.getContext()
                .getAuthentication();
        customRevisionEntity.setUsername(authentication.getName());
    }
}

我的表格如下,

mysql> select * from revision_info;
+----+---------------+-----------------+
| id | timestamp     | username        |
+----+---------------+-----------------+
|  1 | 1431693146030 | sky@test.com    |
|  2 | 1431693150805 | ram@test.com    |
|  3 | 1431693164895 | bobo@test.com   |
+----+---------------+-----------------+
3 rows in set (0.02 sec)

我能够使用"timeStamp"和"timeStamp"使用"rev"使用以下代码检索"rev",

AuditReader reader = AuditReaderFactory.get(session);
Date timestamp = reader.getRevisionDate(rev);
Number revision = reader.getRevisionNumberForDate(timestamp);

但我无法使用hibernate查询使用自定义字段"username"值检索整行.

Criteria criteria = sessionFactory.getCurrentSession()
                .createCriteria(CustomRevisionEntity.class)
                .add(Restrictions.eq("id", rev));

以上查询返回上述错误..如何解决？如何从revision_info表中检索值？

我的错误的完整堆栈跟踪是,

org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
    at org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:64) ~[spring-orm-3.2.6.RELEASE.jar:3.2.6.RELEASE]
    at org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:687) ~[hibernate-core-3.6.3.Final.jar:3.6.3.Final]
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) ~[spring-core-3.2.6.RELEASE.jar:3.2.6.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:701) ~[spring-aop-3.2.6.RELEASE.jar:3.2.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) ~[spring-aop-3.2.6.RELEASE.jar:3.2.6.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91) ~[spring-aop-3.2.6.RELEASE.jar:3.2.6.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) ~[spring-aop-3.2.6.RELEASE.jar:3.2.6.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:634) ~[spring-aop-3.2.6.RELEASE.jar:3.2.6.RELEASE]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.6.0_31]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.6.0_31]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.6.0_31]
    at java.lang.reflect.Method.invoke(Method.java:622) ~[na:1.6.0_31]
    at ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:870) ~[ognl-3.0.6.jar:na]
    at ognl.OgnlRuntime.callAppropriateMethod(OgnlRuntime.java:1293) ~[ognl-3.0.6.jar:na]
    at ognl.ObjectMethodAccessor.callMethod(ObjectMethodAccessor.java:68) ~[ognl-3.0.6.jar:na]
    at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethodWithDebugInfo(XWorkMethodAccessor.java:117) [xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.ognl.accessor.XWorkMethodAccessor.callMethod(XWorkMethodAccessor.java:108) [xwork-core-2.3.20.jar:2.3.20]
    at ognl.OgnlRuntime.callMethod(OgnlRuntime.java:1369) ~[ognl-3.0.6.jar:na]
    at ognl.ASTMethod.getValueBody(ASTMethod.java:90) ~[ognl-3.0.6.jar:na]
    at ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:212) ~[ognl-3.0.6.jar:na]
    at ognl.SimpleNode.getValue(SimpleNode.java:258) ~[ognl-3.0.6.jar:na]
    at ognl.Ognl.getValue(Ognl.java:494) ~[ognl-3.0.6.jar:na]
    at ognl.Ognl.getValue(Ognl.java:458) ~[ognl-3.0.6.jar:na]
    at com.opensymphony.xwork2.ognl.OgnlUtil$2.execute(OgnlUtil.java:309) ~[xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.ognl.OgnlUtil.compileAndExecute(OgnlUtil.java:340) ~[xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.ognl.OgnlUtil.getValue(OgnlUtil.java:307) ~[xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:423) ~[xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:287) ~[xwork-core-2.3.20.jar:2.3.20]
    at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:250) ~[xwork-core-2.3.20.jar:2.3.20]
    at org.apache.struts2.interceptor.DeprecationInterceptor.intercept(DeprecationInterceptor.java:41) ~[struts2-core-2.3.20.jar:2.3.20]

我的弹簧配置如下,

    <bean id="transactionManager"
              class="org.springframework.orm.hibernate3.HibernateTransactionManager">
            <property name="sessionFactory" ref="xxxSessionFactory"/>
    </bean>

    <tx:advice id="customRevisionEntityAdvice" transaction-manager="transactionManager">
            <tx:attributes>
                <tx:method name="*" read-only="false" propagation="REQUIRED"/>
            </tx:attributes>
    </tx:advice>

    <aop:config>
        <aop:pointcut id="crePointcut"
                      expression="execution(* bla.bla.CustomRevisionEntity.*(..))"/>
        <aop:advisor advice-ref="customRevisionEntityAdvice" pointcut-ref="crePointcut"/>
    </aop:config>

我的application-content.xml包含以下内容......

<bean id="auditEventListener" class="org.hibernate.envers.event.AuditEventListener" />

    <bean id="xxxSessionFactory"
          class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <property name="annotatedClasses">
            <list>                  
                <value>bla.bla.domain.Myclass</value>
            </list>
        </property>

        <property name="eventListeners">
            <map>
                <entry key="post-insert" value-ref="auditEventListener"/>
                <entry key="post-update" value-ref="auditEventListener"/>
                <entry key="post-delete" value-ref="auditEventListener"/>
                <entry key="pre-collection-update" value-ref="auditEventListener"/>
                <entry key="pre-collection-remove" value-ref="auditEventListener"/>
                <entry key="post-collection-recreate" value-ref="auditEventListener"/>
            </map>
        </property>

Answer 1

使用Envers

你可以查询CustomRevisionEntity使用AuditReader

AuditReader auditReader = AuditReaderFactory.get(entityManager);

//Here you find the revision number that you want
Number revisionNumber = getRevisionNumber(auditReader);

//then you use the auditReader :-)
CustomRevisionEntity cRevEntity = auditReader.findRevision(
                CustomRevisionEntity.class, revisionNumber );

//Then you can just get your Username
String userName = cRevEntity.getUsername();

这是方法签名

 /**
 * A helper method; should be used only if a custom revision entity is used. See also {@link RevisionEntity}.
 * @param revisionEntityClass Class of the revision entity. Should be annotated with {@link RevisionEntity}.
 * @param revision Number of the revision for which to get the data.
 * @return Entity containing data for the given revision.
 * @throws IllegalArgumentException If revision is less or equal to 0 or if the class of the revision entity
 * is invalid.
 * @throws RevisionDoesNotExistException If the revision does not exist.
 * @throws IllegalStateException If the associated entity manager is closed.
 */
<T> T findRevision(Class<T> revisionEntityClass, Number revision) throws IllegalArgumentException,
        RevisionDoesNotExistException, IllegalStateException;

从Hibernate-envers 3.6.3.Final源代码,这是在AuditReaderImpl.java第193行实现的:

@SuppressWarnings({"unchecked"})
public <T> T findRevision(Class<T> revisionEntityClass, Number revision) throws IllegalArgumentException,
        RevisionDoesNotExistException, IllegalStateException {
    checkNotNull(revision, "Entity revision");
    checkPositive(revision, "Entity revision");
    checkSession();

    Set<Number> revisions = new HashSet<Number>(1);
    revisions.add(revision);
    Query query = verCfg.getRevisionInfoQueryCreator().getRevisionsQuery(session, revisions);

    try {
        T revisionData = (T) query.uniqueResult();

        if (revisionData == null) {
            throw new RevisionDoesNotExistException(revision);
        }

        return revisionData;
    } catch (NonUniqueResultException e) {
        throw new AuditException(e);
    }
}

更新 - 缺少Spring配置

查看堆栈跟踪,您将错过一些Spring事务配置.使用声明性配置或使用注释.

声明性配置

您需要在配置xml中声明事务的使用,这是使用AOP切入点完成的.看一下这个例子,你可以看到它首先设置TransactionManager它DataSource,然后声明每个方法x.y.service.FooService都需要一个事务

<!-- ensure that the above transactional advice runs for any execution
     of an operation defined by the FooService interface -->
<aop:config>
    <aop:pointcut id="fooServiceOperation" expression="execution(* x.y.service.FooService.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="fooServiceOperation"/>
</aop:config>

您提供的配置缺少 AOP配置.为方便起见,您可以配置特定包中的每个类以使用事务.

<aop:config>
    <aop:pointcut id="fooServiceMethods" expression="execution(* x.y.service.*.*(..))"/>
    <aop:advisor advice-ref="txAdvice" pointcut-ref="fooServiceMethods"/>
</aop:config>

看到那只是expression="execution(* x.y.service.*.*(..))"改变了.

使用@Transactional

Spring幸好提供了一种更简单的方法来声明@Transactional方法的用法,只需将类,接口或方法注释为@Transactional

// the service class that we want to make transactional
@Transactional
public class DefaultFooService implements FooService {

    Foo getFoo(String fooName);

    Foo getFoo(String fooName, String barName);

    void insertFoo(Foo foo);

    void updateFoo(Foo foo);
}

之后,我们需要配置spring来扫描我们的代码,寻找@Transactional,以便在需要时生成正确的代理bean实例.

<!-- enable the configuration of transactional behavior based on annotations -->
<tx:annotation-driven transaction-manager="txManager"/><!-- a PlatformTransactionManager is still required -->

以下是@Transactional 的完整示例以及关于事务的spring配置的参考.

在Hibernate 3上启用配置

Hibernate 3需要一个特殊的配置来使用Envers,你需要在你的persistence.xml.例

<property name="hibernate.ejb.event.post-insert" value="org.hibernate.ejb.event.EJB3PostInsertEventListener,org.hibernate.envers.event.AuditEventListener" />
<property name="hibernate.ejb.event.post-update" value="org.hibernate.ejb.event.EJB3PostUpdateEventListener,org.hibernate.envers.event.AuditEventListener" />
<property name="hibernate.ejb.event.post-delete" value="org.hibernate.ejb.event.EJB3PostDeleteEventListener,org.hibernate.envers.event.AuditEventListener" />
<property name="hibernate.ejb.event.pre-collection-update" value="org.hibernate.envers.event.AuditEventListener" />
<property name="hibernate.ejb.event.pre-collection-remove" value="org.hibernate.envers.event.AuditEventListener" />
<property name="hibernate.ejb.event.post-collection-recreate" value="org.hibernate.envers.event.AuditEventListener" />

如果你没有一个persistence.xml中还是hibernate.cfg.xml,你声明SessionFactory,它只是工作,你需要编辑Spring配置像这样

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
    ....
    <property name="eventListeners">
        <map>
            <entry key="post-insert" value-ref="auditListener"/>
            <entry key="post-update" value-ref="auditListener"/>
            <entry key="post-delete" value-ref="auditListener"/>
            <entry key="pre-collection-update" value-ref="auditListener"/>
            <entry key="pre-collection-remove" value-ref="auditListener"/>
            <entry key="post-collection-recreate" value-ref="auditListener"/>
        </map>
    </property>
    ...
</bean>

<bean id="auditListener" class="org.hibernate.envers.event.AuditEventListener"/>