jersey-spring3实例化Spring管理的bean(null!)

Rya*_*yan 11 rest spring dependency-injection jersey jersey-2.0

我首先要指出的是,这是我在职业生涯中曾经处理过的浪费时间的最大问题.(现在已经过了两天,基本上没有进展.)我尝试的每一个"解决方案"或"解决方案"都没有用,所以我被封锁了,非常渴望得到一些帮助.

简而言之,问题是Jersey/HK2似乎总是实例化我的Spring管理的bean,因为它们已经被Spring实例化了,这告诉我jersey-spring3没有完成它的工作,或者至少不是我当前的设置(或者到目前为止我尝试过的约50种设置的排列.)

请注意,当我使用空构造函数时,这些资源字段在运行时为空.

我不明白为什么我当前的设置不起作用,因为我本质上是复制这个在线示例

任何帮助都超过赞赏!!

组态

- - - - - pom.xml - - - - -

<!-- ... -->

<dependencies>

    <!-- Spring Dependencies -->

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-instrument</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-instrument-tomcat</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${spring.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-core</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-beans</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-core</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-ldap</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-parent</artifactId>
        <version>${spring.version}</version>
        <classifier>tests</classifier>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-config</artifactId>
        <version>${spring.version}</version>
        <classifier>tests</classifier>
    </dependency>

    <dependency>
        <groupId>org.springframework.security</groupId>
        <artifactId>spring-security-acl</artifactId>
        <version>${spring.version}</version>
        <exclusions>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-support</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-jdbc</artifactId>
            </exclusion>
            <exclusion>
                <groupId>org.springframework</groupId>
                <artifactId>spring-dao</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
        <scope>test</scope>
    </dependency>

    <!-- / Spring Dependencies -->

    <!-- API dependencies -->

    <dependency>
        <groupId>org.glassfish.jersey.core</groupId>
        <artifactId>jersey-client</artifactId>
        <version>${jersey.version}</version>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.containers</groupId>
        <artifactId>jersey-container-servlet</artifactId>
        <version>${jersey.version}</version>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.media</groupId>
        <artifactId>jersey-media-json-processing</artifactId>
        <version>${jersey.version}</version>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.test-framework.providers</groupId>
        <artifactId>jersey-test-framework-provider-grizzly2</artifactId>
        <version>2.4</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.glassfish.jersey.ext</groupId>
        <artifactId>jersey-spring3</artifactId>
        <version>${jersey.version}</version>
    </dependency>

    <dependency>
        <groupId>com.google.code.gson</groupId>
        <artifactId>gson</artifactId>
        <version>${gson.version}</version>
    </dependency>

    <!-- / API dependencies -->

    <!-- ... -->

</dependencies>

<!-- ... -->

<properties>

    <!-- ... -->

    <spring.version>3.0.5.RELEASE</spring.version>

    <jersey.version>2.4.1</jersey.version>

    <gson.version>2.2.4</gson.version>

    <!-- ... -->

</properties>

<!-- ... -->
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- - - - - web.xml - - - - -

<web-app>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:/beans.xml</param-value>
    </context-param>

    <!-- ... -->

    <servlet>
        <servlet-name>Jersey REST Service</servlet-name>
        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>fubar.rest.FubarJerseyApplication</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>Jersey REST Service</servlet-name>
        <url-pattern>/api/*</url-pattern>
    </servlet-mapping>

    <!-- ... -->

</web-app>
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- - - - - beans.xml(上下文配置) - - - - -

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
            http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

<!-- ... -->

<!-- beans-outbound-api has configuration for spring-jersey3 to work properly -->
<import resource="beans-api.xml" />

</beans>
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- - - - - beans-api.xml - - - - -

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context
  http://www.springframework.org/schema/context/spring-context.xsd">

    <!-- Services -->

    <bean id="locationServiceV1" class="fubar.rest.v1.services.location.impl.LocationServiceV1" />
    <bean id="locationServiceV2" class="fubar.rest.v2.services.location.impl.LocationServiceV2" />

    <bean id="viewServiceV1" class="fubar.rest.v1.services.view.impl.ViewServiceV1" />
    <bean id="viewServiceV2" class="fubar.rest.v2.services.view.impl.ViewServiceV2" />

    <!-- Resources -->

    <bean class="fubar.rest.resources.location.impl.LocationResource">
        <constructor-arg index="0" ref="locationServiceV1" />
        <constructor-arg index="1" ref="locationServiceV2" />
    </bean>

    <bean class="fubar.rest.resources.view.impl.ViewResource">
        <constructor-arg index="0" ref="viewServiceV1" />
        <constructor-arg index="1" ref="viewServiceV2" />
    </bean>

</beans>
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- - - - - 资源(JAX-RS) - - - - -

@Path(RESTLocationResourceV1.PathFields.PATH_ROOT)
@Produces({V1_JSON, APPLICATION_JSON})
public class LocationResource
    extends ResourceBase<LocationResource, ILocationServiceV1, ILocationServiceV2> {

  private static final Logger logger = Logger.getLogger(LocationResource.class);

  @Inject
  public LocationResource(final LocationServiceV1 v1Loc, final LocationServiceV2 v2Loc) {
    super(v1Loc, v2Loc);
    logger.info(format(Messages.INF_INSTANTIATED, "LocationResource"));
  }

  @GET
  @Path(PathFields.SUBPATH_LIST)
  public LocationListV1 listV1(@HeaderParam(HEADER_API_KEY) String apiKey)
      throws ApplicationException {
    // Implementation
  }

  @GET
  @Path(PathFields.SUBPATH_SEARCH)
  public LocationListV1 searchV1(@HeaderParam(HEADER_API_KEY) String apiKey,
      @QueryParam(QueryFields.QUERY) String likeText) throws ApplicationException {
    // Implementation
  }
}
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- - - - - 服务(春豆) - - - - -

public class LocationServiceV1 extends ServiceBaseV1<LocationBean, LocationV1, LocationListV1>
    implements
      ILocationServiceV1 {

  @Autowired
  private LocationDao daoLoc;

  public LocationServiceV1() {
    super(new LocationBeanToJsonTranslatorV1());
  }

  @Override
  public LocationListV1 listV1() throws ApplicationException {
    // Implementation
  }

  @Override
  public LocationListV1 searchV1(String likeText) throws ApplicationException {
    // Implementation
  }
}
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(版本2基本相同)

- - - - - 申请表(泽西岛) - - - - -

public class FubarJerseyApplication extends ResourceConfig {

  private static final class Messages {
    static final String INF_STARTING_APPLICATION = "Starting %s!";
  }

  private static final Logger logger = Logger.getLogger(FubarJerseyApplication.class);

  public FubarJerseyApplication() {
    packages("fubar.rest");
    logger.info(format(Messages.INF_STARTING_APPLICATION, this.getClass().getName()));
  }
}
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调用(客户)

curl http://my-ip-address/fubar/api/location/list
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(500内部服务器错误)

错误(服务器)

org.glassfish.hk2.api.UnsatisfiedDependencyException: There was no object
available for injection at Injectee(requiredType=LocationServiceV1,parent=
LocationResource,qualifiers={}),position=0,optional=false,self=false,
unqualified=null,344016971)
at org.jvnet.hk2.internal.ThreeThirtyResolver.resolve(ThreeThirtyResolver.java:74)
at org.jvnet.hk2.internal.ClazzCreator.resolve(ClazzCreator.java:208)
at org.jvnet.hk2.internal.ClazzCreator.resolveAllDependencies(ClazzCreator.java:225)
at org.jvnet.hk2.internal.ClazzCreator.create(ClazzCreator.java:329)
at org.jvnet.hk2.internal.SystemDescriptor.create(SystemDescriptor.java:456)
at org.glassfish.jersey.process.internal.RequestScope.findOrCreate(RequestScope.java:158)
at org.jvnet.hk2.internal.Utilities.createService(Utilities.java:2350)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:612)
at org.jvnet.hk2.internal.ServiceLocatorImpl.getService(ServiceLocatorImpl.java:597)
at org.glassfish.jersey.internal.inject.Injections.getOrCreate(Injections.java:173)
at org.glassfish.jersey.server.model.MethodHandler$ClassBasedMethodHandler.getInstance(MethodHandler.java:185)
at org.glassfish.jersey.server.internal.routing.PushMethodHandlerRouter.apply(PushMethodHandlerRouter.java:103)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:128)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:131)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:131)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:131)
at org.glassfish.jersey.server.internal.routing.RoutingStage._apply(RoutingStage.java:131)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:110)
at org.glassfish.jersey.server.internal.routing.RoutingStage.apply(RoutingStage.java:65)
at org.glassfish.jersey.process.internal.Stages.process(Stages.java:197)
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:250)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:318)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:236)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:983)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:361)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:335)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:218)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at fubar.server.springframework.SessionFilter.doFilter(SessionFilter.java:44)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at fubar.server.springframework.loader.ContextLoaderHttpInterceptor$LoaderState.filter(ContextLoaderHttpInterceptor.java:75)
at fubar.server.springframework.loader.ContextLoaderHttpInterceptor$StartedState.filter(ContextLoaderHttpInterceptor.java:120)
at fubar.server.springframework.loader.ContextLoaderHttpInterceptor.doFilter(ContextLoaderHttpInterceptor.java:62)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:311)
at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:776)
at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:705)
at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:898)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
at java.lang.Thread.run(Thread.java:662)
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API日志

Dec 10, 2013 13:36:28 INFO  [main] fubar.rest.FubarJerseyApplication
     - Starting fubar.rest.FubarJerseyApplication!
Dec 10, 2013 13:38:06 INFO  [pool-1-thread-1] resources.location.impl.LocationResource
     - LocationResource has been instantiated
Dec 10, 2013 13:38:06 INFO  [pool-1-thread-1] resources.view.impl.ViewResource
     - ViewResource has been instantiated
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更新 - 发现这个:

卡塔利娜日志

Dec 10, 2013 1:36:42 PM org.glassfish.jersey.server.ApplicationHandler initialize
INFO: Initiating Jersey application, version Jersey: 2.4.1 2013-11-08 12:08:47...
Dec 10, 2013 1:36:43 PM org.glassfish.jersey.server.spring.SpringComponentProvider initialize
SEVERE: Spring context lookup failed, skipping spring component provider initialization.
Dec 10, 2013 1:38:00 PM com.sun.xml.bind.v2.runtime.reflect.opt.Injector inject
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...所以在SpringComponentProvider #initialize中找不到ApplicationContext .

Joh*_*n R 9

先加载什么?春天还是泽西岛?可能是SpringComponentProvider调用时没有初始化Spring上下文WebApplicationContextUtils.getWebApplicationContext(sc);.尝试使用Spring的ContextLoaderListener,以便Spring在部署应用程序后立即进行初始化.

我遇到了很多你在使用jersey-spring3库时遇到的问题.它在查找我的Spring ApplicationContext时遇到了问题(看起来这就是你被困住的地方)并且它炸毁了注入以通用参数作为参数的setter.

如果你超越了应用程序上下文问题,我认为你所拥有的东西无论如何都会有效.您在XML中定义了ViewResource和LocationResource bean.据我所知,如果资源类使用@Component注释,Jersey将只从Spring获取资源实例.看看org.glassfish.jersey.server.spring.SpringComponentProvider,具体来说component.isAnnotationPresent(Component.class):

// detect JAX-RS classes that are also Spring @Components.
// register these with HK2 ServiceLocator to manage their lifecycle using Spring.
@Override
public boolean bind(Class<?> component, Set<Class<?>> providerContracts) {

    if (ctx == null) {
        return false;
    }

    if(component.isAnnotationPresent(Component.class)) {
        DynamicConfiguration c = Injections.getConfiguration(locator);
        String[] beanNames = ctx.getBeanNamesForType(component);
        if(beanNames == null || beanNames.length != 1) {
            LOGGER.severe(LocalizationMessages.NONE_OR_MULTIPLE_BEANS_AVAILABLE(component));
            return false;
        }
        String beanName = beanNames[0];

        ServiceBindingBuilder bb = Injections.newFactoryBinder(new SpringComponentProvider.SpringManagedBeanFactory(ctx, locator, beanName));
        bb.to(component);
        Injections.addBinding(bb, c);
        c.commit();

        LOGGER.config(LocalizationMessages.BEAN_REGISTERED(beanName));
        return true;
    }
    return false;
}
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一个不相关的问题是我们还希望将所有JAX-RS注释移动到接口.每当我尝试它时,我得到"找不到适合com.foo.ResourceInterface的构造函数".

最后,我通过不使用jersey-spring3并将自己的Jersey连接到Spring连接器解决了我的所有问题.这是我做的:

  1. 将我的所有资源配置为常规Spring bean.如果需要,您可以使用XML.
  2. 在我的应用程序中,我添加了绑定到HK2容器,以便在需要其中一个资源的实例时使用工厂.我的工厂类只返回资源的Spring托管实例.
  3. 在工厂返回Spring管理的bean之前,我使用Jersey/HK2 ServiceLocator注入Jersey提供的东西.例如,任何使用@Context注释的内容.

我的javax.ws.rs.Application看起来像这样:

public class RestConfig extends ResourceConfig {
private static final Log log = LogFactory.getLog(RestConfig.class);


@Inject
public RestConfig(ServiceLocator locator) {
    super();
    // specific to my app. get your spring beans however you like
    Collection<Object> beans = BeanLocator.beansByAnnotation(RestResource.class);

    DynamicConfiguration c = Injections.getConfiguration(locator);


    for (Object bean : beans)
    {
                    // tell jersey to use a factory for any interface that the bean implements.  since your resources don't implement interfaces, 
                    // you'll want to do something a bit different here.
        for (Class<?> currentInterface : bean.getClass().getInterfaces())
        {
            if (log.isTraceEnabled())
                log.trace("binding " + currentInterface.getSimpleName() + " to Spring managed bean");

            ServiceBindingBuilder<Object> bb = Injections.newFactoryBinder(new StaticLookupFactory(locator, bean));
            bb.to(currentInterface);
                    Injections.addBinding(bb, c);
        }
    }

            // commit the changes to the HK2 container (don't skip this step!)
            c.commit();

    property("jersey.config.disableMoxyJson.server", true);
    packages("com.foo.web.rest");

    register(MoxyXmlFeature.class);
}


// a "factory" where the provide() method returns the spring managed bean
    // that was passed to the constructor.
private static class StaticLookupFactory implements Factory<Object> {

    private ServiceLocator locator;
    private Object bean;

    StaticLookupFactory(ServiceLocator locator, Object bean)
    {
        this.locator = locator;
        this.bean = bean;
    }

    @Override
    public Object provide() {
                    // inject this annotated with @Context, @Inject, etc
        locator.inject(bean);
        return bean;
    }

    @Override
    public void dispose(Object instance) {
    }

}
}
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BeanLocator是我编写的实用程序类,当自动装配不可用时,可以使用静态方法轻松获取bean实例.例如,在Spring托管bean之外工作时.没有那么多:

public static Collection<Object> beansByAnnotation(Class<? extends Annotation> annotation)
{
    return applicationContext.getBeansWithAnnotation(annotation).values();
}
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RestResource也是我们的应用程序特有的.它是一个定制的构造型,像@ Component,@ Service等一样:

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Component
public @interface RestResource {
    String value() default "";
}
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请注意,Jersey允许您注册org.glassfish.jersey.server.spring.ComponentProvider的自定义实现,以自行管理资源的生命周期.我尝试过但无论我做了什么都无法识别我的实现.

另一个注意事项...... locator.inject(bean)激活Jersey依赖注入机制的调用将处理用@Inject标记的任何内容.在类中使用@Autowired或使用XML配置bean,以避免Spring和Jersey尝试解析使用@Inject注释的内容的值.


Rya*_*yan 3

我们有一个自定义的异步ContextLoader,因此临时解决方案需要在Jersey-Spring3源中放置一个完整的 hack,以等待应用程序在自定义组件提供程序初始化之前初始化。

PS 对于任何发现自己必须做这样的事情的可怜人,请确保 META-INF/settings 包含SpringComponentProvider配置。


(2014-04-18) 为@Scott 阐述

请注意,这是一个可怕的黑客攻击,只有当所有其他尝试都失败时,我才会尝试这样做作为最后的手段,就像我的情况一样。另外,在尝试此类操作之前,我会咨询泽西岛邮件组有关您的问题的信息。

这就是说......这就是我为解决我的问题所做的:

  • 从字面上将 spring-jersey3 的源代码复制到我的应用程序/服务器中,根据许可证使用适当的标签修改每个文件的标头;

  • 创建了以下类——

===>

  /**
   * Hack class for RN-8979.
   *
   * @author ryan
   *
   */
  public class ContextLoadWaiter {

    private static final Logger logger = Logger.getLogger(ContextLoadWaiter.class);

    public void doWait() {

      try {
        while (ContextLoaderHttpInterceptor.isNotStarted()) {
          logger.info("Waiting for ContextLoader to start...");
          Thread.sleep(1000);
        }
      } catch (InterruptedException e) {
        logger.error("SpringComponentProvider was interrupted!");
      }
    }
  }
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请注意,这是特定于*我们的*代码库的,就像ContextLoaderHttpInterceptorhttp servlet 一样,如果我们的自定义(恰好是异步的)尚未加载,则isNotStarted返回。trueContextLoader

出于某种原因,某些人有时会将自定义异步ContextLoader设置到位,以便允许 UI 在服务器启动时显示“正在加载”页面。(可能不是添加此 UI“功能”的正确方法,但代码就在那里并且 UI 依赖于它,所以我必须处理它......)

由于这部分不会直接适用于您,因此关键是通过SpringComponentProvider(从此处)进行调试并查看ClassPathXmlApplicationContext. 如果是null,就像我们的例子一样,那么您需要弄清楚为什么会这样null,并在初始化该组件之前等待ContextLoader您使用的任何内容加载。

  • 把这条粗俗的线放在SpringComponentProvider——

==>

  ...

  private final ContextLoadWaiter waiter = new ContextLoadWaiter();

  ...

  @Override
  public void initialize(ServiceLocator locator) {

    waiter.doWait(); // Wait on our asynchronous context loader.

    this.locator = locator;

    if (LOGGER.isLoggable(Level.FINE)) {
      LOGGER.fine("Context lookup started");
    }

    ...
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  • 创建了此文件:META-INF/services/org.glassfish.jersey.server.spi.ComponentProvider内容是 SpringComponentProvider 的完全限定类路径,例如com.company.server.nbi.rest.internal.jspring.SpringComponentProvider

  • 添加了自定义 Jersey-spring3 包作为要在应用程序中扫描的包;见下文...

==>

/**
 * Application configuration.
 *
 * @author ryan
 *
 */
public class MyJerseyApplication extends ResourceConfig {

  private static final class Messages {
    static final String INF_STARTING_APPLICATION = "Starting %s!";
  }

  private static final Logger logger = Logger.getLogger(MyJerseyApplication.class);

  public MyJerseyApplication() {

    packages(
    /* Internal providers */
    "com.company.server.nbi.rest.providers",
    /* Internal filters */
    "com.company.server.nbi.rest.filters",
    /* Spring injection support */
    "com.company.server.nbi.rest.internal.jspring", // HERE!!!
    /* Json providers */
    "com.fasterxml.jackson.jaxrs.json",
    /* Jackson exception mappers */
    "com.fasterxml.jackson.jaxrs.base");

    /* Resources */
    register(ResourceA.class);
    register(ResourceB.class);
    register(ResourceC.class);

    /* Miscellaneous features */
    register(MultiPartFeature.class);
    register(LoggingFilter.class);

    logger.info(format(Messages.INF_STARTING_APPLICATION, this.getClass().getName()));
  }
}
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就是这样”。这绝对不是一个值得骄傲的解决方案,但如果您像我一样处于绝望模式,那么尝试一下可能不会有什么坏处。