java - XMLAdapter 上的编译时和加载时编织和自动连线不起作用

Question

我有一个基于 XML 的数据库，并且定义了一个用户模型，其中包含对角色(另一个模型)的引用列表。我已将 XMLAdapter 附加到 Roles 属性以自动填充角色。为此，我已在此适配器中 @autowired RoleRepository。

但是，无论我做什么，存储库都不会自动连接(始终null)。我已经配置了编译时编织、加载时编织，并且还尝试了一个能够将自身加载到正在运行的 JVM invesdwin-instrument 中的检测 Java 代理。

@Configurable(autowire = Autowire.BY_TYPE)
public class RoleAdapter extends XmlAdapter<String, List<Role>> {

    @Autowired
    protected RoleRepository roleRepository;

    public RoleAdapter() {
    }

    @Override
    public List<Role> unmarshal(String nameList) throws Exception {
        // code using roleRepository
    }

    @Override
    public String marshal(List<Role> roles) throws Exception {
        // some code
    }
}

@SpringBootApplication
@EnableConfigurationProperties({MyProperties.class})
@EntityScan(basePackages = { ... })
@EnableDiscoveryClient
@EnableLoadTimeWeaving(aspectjWeaving=EnableLoadTimeWeaving
    .AspectJWeaving.ENABLED)
@EnableSpringConfigured // tried this in a separate config
public class MyApplication {

    static { // this was not here, added in a desperate move
        DynamicInstrumentationLoader.waitForInitialized();
        DynamicInstrumentationLoader.initLoadTimeWeavingContext();
    }

    // some code

    /**
     * Main method, used to run the application.
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {

        // dynamically attach java agent to jvm if not already present
        DynamicInstrumentationLoader.waitForInitialized();
        // weave all classes before they are loaded as beans
        DynamicInstrumentationLoader.initLoadTimeWeavingContext();

        if (!InstrumentationLoadTimeWeaver.isInstrumentationAvailable()) {
            throw new IllegalStateException("Instrumentation not available!");
        } else { // it always gets here
            System.out.println("Instrumentation available!");
        }

        SpringApplication app = new SpringApplication(MyApplication.class);
        DefaultProfileUtil.addDefaultProfile(app);
        Environment env = app.run(args).getEnvironment();
        logApplicationStartup(env);
    }

    // more code
}

以及用户中的角色字段

@XmlElement(type = String.class)
@XmlJavaTypeAdapter(RoleAdapter.class)
@XmlSchemaType(name = "IDREFS")
protected List<Role> roles;

我想知道我在编织方面错过了什么。也欢迎使用更简单的方法来实现这些自动填充属性。

Answer 1

通过忘记编译时编织和加载时编织，并将 RolesRepository 注入(inject) UsersRepository 中，初始化 RoleAdapter< 的实例，“解决”了该问题 使用注入(inject)的存储库并将此实例添加到解码器中。

@Repository
public class UserRepository extends TimestampRepository<User> {

    public static final String USERS_BY_USERNAME_CACHE = "usersByUsername";
    public static final String USERS_BY_EMAIL_CACHE = "usersByEmail";

    public UserRepository(
            MyProperties myProperties,
            ExistTemplate existTemplate,
            Jaxb2Marshaller marshaller,
            Jaxb2Marshaller unmarshaller,
            RoleRepository roleRepository) {
        super(
                new UserEntityInformation(myProperties.getDatabase().getDbname()),
                existTemplate, marshaller, unmarshaller);
        marshaller.setAdapters(new RoleAdapter(roleRepository));
        unmarshaller.setAdapters(new RoleAdapter(roleRepository));
    }

    // more code
}

public class RoleAdapter extends XmlAdapter<String, List<Role>> {

    protected final RoleRepository roleRepository;

    public RoleAdapter(RoleRepository roleRepository) {
        this.roleRepository = roleRepository;
    }

    @Override
    public List<Role> unmarshal(String nameList) throws Exception {
        // code using roleRepository
    }

    @Override
    public String marshal(List<Role> roles) throws Exception {
        // some code
    }
}