关于我之前的问题，JSR 303 bean 验证，扩展的 ConstraintValidator 不能使用 CDI，Seam 验证模块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)
我不确定我是否可以将 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。我期待着尽快收到您的来信。
我的环境如下：
- 视窗 7 64 位
- JDK 1.6.0_31 64 位
- Eclipse Indigo SR1 64 位
- 玻璃鱼 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);
}
}
持久性.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>
验证.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。