Внедрение зависимостей в Tomcat 8.5 - PullRequest
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Внедрение зависимостей в Tomcat 8.5

0 голосов
/ 14 октября 2019

У меня есть некоторые проблемы с Tomcat и Dependency Injection. Моя задача - добавить функцию для добавления наших услуг. Мы используем Tomcat 8.5.46 и там не работает автоматическое внедрение зависимостей.

Я добавляю следующие зависимости: 

       <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-web-api</artifactId>
            <version>7.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>org.jboss.weld.servlet</groupId>
            <artifactId>weld-servlet</artifactId>
            <version>2.4.4.Final</version>
        </dependency>

        <dependency>
            <groupId>javax.enterprise</groupId>
            <artifactId>cdi-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>

Чем я добавляю beans.xml в папку WEB-INF каждого веб-проекта. 

<?xml version="1.0" encoding="UTF-8"?>
<beans
        xmlns="http://xmlns.jcp.org/xml/ns/javaee"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
        bean-discovery-mode="annotated" />

Но когда я запускаю сервер и выполняю метод, я получаю исключение NullPointerException: 

4-Oct-2019 11:46:14.930 SCHWERWIEGEND [http-nio-8080-exec-1] com.sun.jersey.spi.container.ContainerResponse.mapMappableContainerException The RuntimeException could not be mapped to a response, re-throwing to the HTTP container
    java.lang.NullPointerException
        at ****.services.LoadingEquipmentResource.findById(LoadingEquipmentResource.java:22)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
        at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
        at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
        at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
        at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
        at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
        at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
        at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1542)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1473)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1419)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1409)
        at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:409)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:558)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:733)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:528)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:798)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:810)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)

Здесь вы можете увидеть мои классы: 

@Path("/v2/loadingEquipment")
public class LoadingEquipmentResource {

    @Inject
    private LoadingEquipmentService loadingEquipmentService;

    @GET
    //@Compress
    @Produces(MediaType.APPLICATION_JSON)
    @Path("/{id}")
    public Optional<LoadingEquipment> findById(@PathParam("id") int oid) {
        return loadingEquipmentService.loadLoadingEquipmentForOid(oid);
    }
}


@Named
@ApplicationScoped
public class LoadingEquipmentService {

    private final Logger LOGGER = Logger.getLogger(this.getClass().getName());

    @Inject
    private LoadingEquipmentJpaController loadingEquipmentJpaController;

    public void createLoadingEquipment(LoadingEquipment loadingEquipment) {
        loadingEquipmentJpaController.create(loadingEquipment);
    }

    public void updateLoadingEquipment(LoadingEquipment loadingEquipment) {
        loadingEquipmentJpaController.update(loadingEquipment);
    }

    public void deleteLoadingEquipment(int oid) {
        LoadingEquipment loadingEquipment = loadingEquipmentJpaController.loadLoadingEquipmentForOid(oid);
        if (loadingEquipment == null) {
            LOGGER.debug("LoadingEquipment with oid: " + oid + " couldn't found");
            return;
        }
        loadingEquipmentJpaController.delete(loadingEquipment);
    }

    public Optional<LoadingEquipment> loadLoadingEquipmentForOid(int oid) {
        return Optional.ofNullable(loadingEquipmentJpaController.loadLoadingEquipmentForOid(oid));
    }
}
...