如何将 JPA 验证与 CDI 和 Seam 验证集成

Posted 2023-02-27

【中文标题】如何将 JPA 验证与 CDI 和 Seam 验证集成

【英文标题】：How to integrate JPA validation with CDI and Seam Validation

【发布时间】：2012-10-05 08:27:49

【问题描述】：

关于我之前的问题The JSR 303 bean validation, The extended ConstraintValidator cannot use the CDI，Seam Validation Module 为我提供了一个完美的解决方案，可以集中所有 JSF 和 EJB 业务验证，而无需重复代码。

无论如何，当我尝试让 JPA (EclipseLink) 执行验证时，系统会给我如下信息：

java.lang.IllegalStateException: WEB9031: WebappClassLoader 无法加载资源 [javax.enterprise.inject.spi.BeanManager]，因为它尚未启动，或已停止

完整的堆栈跟踪如下：-

Caused by: java.lang.IllegalStateException: WEB9031: WebappClassLoader unable to load resource [javax.enterprise.inject.spi.BeanManager], because it has not yet been started, or was already stopped
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1401)
at org.glassfish.web.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1359)
at org.jboss.seam.validation.InjectingConstraintValidatorFactory.getInstance(InjectingConstraintValidatorFactory.java:67)
at org.hibernate.validator.internal.engine.ConstraintTree.createAndInitializeValidator(ConstraintTree.java:346)
at org.hibernate.validator.internal.engine.ConstraintTree.getInitializedValidator(ConstraintTree.java:334)
at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:155)
at org.hibernate.validator.internal.engine.ConstraintTree.validateConstraints(ConstraintTree.java:125)
at org.hibernate.validator.internal.metadata.core.MetaConstraint.validateConstraint(MetaConstraint.java:86)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraint(ValidatorImpl.java:442)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForDefaultGroup(ValidatorImpl.java:387)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateConstraintsForCurrentGroup(ValidatorImpl.java:351)
at org.hibernate.validator.internal.engine.ValidatorImpl.validateInContext(ValidatorImpl.java:303)
at org.hibernate.validator.internal.engine.ValidatorImpl.validate(ValidatorImpl.java:133)
at org.eclipse.persistence.internal.jpa.metadata.listeners.BeanValidationListener.validateOnCallbackEvent(BeanValidationListener.java:84)
at org.eclipse.persistence.internal.jpa.metadata.listeners.BeanValidationListener.prePersist(BeanValidationListener.java:62)
at org.eclipse.persistence.descriptors.DescriptorEventManager.notifyListener(DescriptorEventManager.java:698)
at org.eclipse.persistence.descriptors.DescriptorEventManager.notifyEJB30Listeners(DescriptorEventManager.java:641)
at org.eclipse.persistence.descriptors.DescriptorEventManager.executeEvent(DescriptorEventManager.java:200)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectClone(UnitOfWorkImpl.java:4257)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNotRegisteredNewObjectForPersist(UnitOfWorkImpl.java:4234)
at org.eclipse.persistence.internal.sessions.RepeatableWriteUnitOfWork.registerNotRegisteredNewObjectForPersist(RepeatableWriteUnitOfWork.java:513)
at org.eclipse.persistence.internal.sessions.UnitOfWorkImpl.registerNewObjectForPersist(UnitOfWorkImpl.java:4176)
at org.eclipse.persistence.internal.jpa.EntityManagerImpl.persist(EntityManagerImpl.java:440)

我不确定是否可以将 CDI 与约束验证器与 JPA 一起使用。你能帮忙提供进一步的建议吗？非常感谢您提前提供的帮助。我期待很快收到您的来信。

我的环境如下：

Windows 7 64 位 JDK 1.6.0_31 64 位 Eclipse Indigo SR1 64 位 Glassfish 3.1.2.2 EclipseLink 2.3.2（与 GF 捆绑） 焊接 1.1.10-Final 休眠验证 4.3.0.Final 缝焊3.1.1.Final 接缝验证 3.1.0.Final

我的示例编码

实用程序

@Singleton
public class MyUtility 
    public boolean isValid(final String input) 
       return (input != null) || (!input.trim().equals(""));
    

约束注解

@Retention(RetentionPolicy.RUNTIME)
@Target(
    ElementType.TYPE,
    ElementType.ANNOTATION_TYPE,
    ElementType.FIELD
    )
@Constraint(validatedBy = Validator.class)
@Documented
public @interface Validatable 
    String  message() default "Validation is failure";
    Class<?>[] groups() default ;
    Class<? extends Payload>[] payload() default ;

约束验证器

public class Validator extends ConstraintValidator<Validatable, MyBean> 
    //
    //----> Try to inject the utility with Seam validation
    //
    @Inject
    private MyUtility myUtil;

    public void initialize(ValidatableconstraintAnnotation) 
        //nothing
    

    public boolean isValid(final MyBean myBean, 
                           final ConstraintValidatorContext constraintContext) 

        if (myBean == null) 
            return true;
        
        //
        //----> It works as expected, but not for the JPA layer
        //
        return this.myUtil.isValid(myBean.getName());
    

作为实体 bean 的数据 bean

@Entity
//--other JPA annotation
@Validatable
public class MyBean 
    private String name;
    //Getter and Setter here

JSF 支持 bean

@Named
@SessionScoped
public class Page1 
    //javax.validation.Validator
    @Inject
    private Validator validator;

    @Inject
    private MyBean myBean;

    @PersistenceContext(unitName = "mydb-pu")
    private EntityManager em;

    //Submit method
    public void submit() 
        Set<ConstraintViolation<Object>> violations = 
                         this.validator.validate(this.myBean);
        if (violations.size() > 0) 
            //Handle error here.
        
        this.em.persist(this.myBean);
    

Persistence.xml

<persistence-unit name="mydb-pu"
    transaction-type="JTA">
    <jta-data-source>jdbc/mydb</jta-data-source>
    <class>...</class>

    <!-- If I comment this, the exception occurs -->
    <validation-mode>NONE</validation-mode>

    <properties>
        <property name="eclipselink.ddl-generation" value="create-tables"/>
        <property name="eclipselink.ddl-generation" value="none" />
        <property name="eclipselink.ddl-generation.output-mode" value="both"/>
    </properties>

</persistence-unit>

Validation.xml

<?xml version="1.0" encoding="UTF-8"?>
<validation-config
   xmlns="http://jboss.org/xml/ns/javax/validation/configuration"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://jboss.org/xml/ns/javax/validation/configuration
validation-configuration-1.0.xsd">

    <constraint-validator-factory>
        org.jboss.seam.validation.InjectingConstraintValidatorFactory
    </constraint-validator-factory>
</validation-config>

关于提到的 Persistence.xml，如果我删除验证模式，系统会给我一个异常。目前，我禁用 JPA 验证作为临时解决方案。

【问题讨论】：

您能更详细地描述您的配置吗？一些实际的代码也会很好。

就像 Hardy 说的，更多的代码、应用服务器和版本都会有所帮助。

您好 Hardy 和 LightGuard，我已经编辑了我的问题并根据您的要求提供了更多信息。

【参考方案1】：

我遇到了同样的问题并通过添加解决了它：

<property name="javax.persistence.validation.factory" value="org.jboss.seam.validation.InjectingConstraintValidatorFactory"/>

到我在 persistence.xml 中的持久性单元属性。完成此操作后，您可以删除验证模式。