我正在尝试通过Spring的@Configurable注释w/@Resource在需要注入的字段上使用自动依赖注入.这涉及一些设置,比如将spring-agent.jar传递给我的JVM.有关详细信息,请参见此处.
它主要起作用.当我的Tomcat启动时,我看到AspectJ init消息,我的User对象自动获取FileService引用等.
问题是有时它不会发生.它似乎是完全随机的; 有时我启动并且不会注入依赖项,有时它们是.我以前遇到过@Transactional在我的用户上的问题,因为它造成了冲突,我相信代理.我正在使用JPA,因此我的用户标有@Entity,所以我现在最好的猜测是这会产生冲突.我读过你不能自动代理代理.为了抵消冲突,我在网上找到了一些关于排除CGLIB和javassist的注释,这些注释是Hibernate(我的JPA impl)使用的.
线索:
我怎么能弄清楚出了什么问题?是否有人使用@Configurable和JPA?为什么我的dependencyCheck = true在没有实际注入依赖项时抛出错误?
实体
@Entity
@Configurable(dependencyCheck = true)
@NamedQueries( { @NamedQuery(name = "User.findAll", query = "SELECT user FROM User user"),
@NamedQuery(name = "User.findByEmail", query = "SELECT user FROM User user WHERE user.email = :email") })
public abstract class User extends BaseModel {
private static final long serialVersionUID = 7881431079061750040L;
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private Long id;
@Column(unique = true, nullable = …Run Code Online (Sandbox Code Playgroud) 我有一个非托管的 JPA 域类。它是通过new操作符实例化的。
UserAccount account = new UserAccount();
userRepository.save(account)
Run Code Online (Sandbox Code Playgroud)
在我的UserAccount课堂上,我有一个beforeSave()方法依赖于我SecurityService对密码进行哈希编码。
我的问题是“如何让 spring DI 将安全服务注入我的实体?”。似乎 AspectJ 和 LoadTimeWeaving 是我需要的。我已经尝试了一个用于配置的数组,但我似乎无法让它们中的任何一个工作。NullPointerException尝试在注入的对象上调用方法时,我总是得到一个。
UserAccount.java(这是 JPA 实体)
@Entity
@Repository
@Configurable(autowire = Autowire.BY_TYPE)
public class UserAccount implements Serializable {
@Transient
@Autowired
SecurityService securityService;
private String passwordHash;
@Transient
private String password;
public UserAccount() {
super();
}
@PrePersist
public void beforeSave() {
if (password != null) {
// NullPointerException Here!!!
passwordHash = securityService.hashPassword(password);
}
}
}
Run Code Online (Sandbox Code Playgroud)
试图表明 spring …
According this answer
/sf/answers/240083021/
To use @Transactional when I execute local method I did following steps:
added to pom.xml:
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.7</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.7</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</dependency>
Run Code Online (Sandbox Code Playgroud)
replace in context
<tx:annotation-driven transaction-manager="transactionManager"/>
Run Code Online (Sandbox Code Playgroud)
with
<tx:annotation-driven transaction-manager="transactionManager" mode="aspectj"/>
Run Code Online (Sandbox Code Playgroud)
after it I saw
Could not obtain transaction-synchronized Session for current thread
additionally added:
<context:load-time-weaver/>
Run Code Online (Sandbox Code Playgroud)
But when make mvn clean install I see(problem occures when tests try to execute. In my test I up appliction context):
java.lang.IllegalStateException: Failed …Run Code Online (Sandbox Code Playgroud)