java - 迁移 Jersey 2.22.1 至 Jersey 2.22.2

Question

无法从 Jersey 2.22.1 版本升级到 2.22.2 版本。
层次结构:

build.gradle 中的依赖项部分:

def jerseyVersion = '2.22.1'
def hk2Version = '2.4.0-b31'
def giuceVersion = '4.0'

dependencies {
    //javax
    compile "javax.servlet:javax.servlet-api:3.1.0"
    //jersey
    compile "org.glassfish.jersey.core:jersey-server:${jerseyVersion}"
    compile "org.glassfish.jersey.containers:jersey-container-servlet:${jerseyVersion}"
    //hk2
    compile "org.glassfish.hk2:guice-bridge:${hk2Version}"
    //guice
    compile "com.google.inject:guice:${giuceVersion}"
    compile "com.google.inject.extensions:guice-servlet:${giuceVersion}"
}

文件 web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <display-name>REST API App</display-name>

    <listener>
        <listener-class>com.example.core.JerseyGuiceServletContextListener</listener-class>
    </listener>

    <filter>
        <filter-name>guiceFilter</filter-name>
        <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>guiceFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

JerseyGuiceServletContextListener 类:

package com.example.core;

import com.google.inject.Guice;
import com.google.inject.Injector;
import com.google.inject.servlet.GuiceServletContextListener;

public class JerseyGuiceServletContextListener extends GuiceServletContextListener {
    @Override
    protected Injector getInjector() {
        return Guice.createInjector(new JerseyServletModuleConfig());
    }
}

JerseyServletModuleConfig 类:

package com.example.core;

import com.google.inject.Scopes;
import com.google.inject.servlet.ServletModule;
import com.example.ws.HeyResource;
import org.glassfish.jersey.servlet.ServletContainer;

import java.util.Map;
import java.util.TreeMap;

class JerseyServletModuleConfig extends ServletModule {
    @Override
    protected void configureServlets() {
        Map<String, String> servletContainerParams = new TreeMap<>();
        servletContainerParams.put("javax.ws.rs.Application", JerseyConfiguration.class.getCanonicalName());
        bind(ServletContainer.class).in(Scopes.SINGLETON);
        filter("/*").through(ServletContainer.class, servletContainerParams);
        bind(HeyResource.class).in(Scopes.SINGLETON);
    }
}

JerseyConfiguration 类:

package com.example.core;

import com.google.inject.Injector;
import org.glassfish.hk2.api.ServiceLocator;
import org.glassfish.jersey.server.ResourceConfig;
import org.jvnet.hk2.guice.bridge.api.GuiceBridge;
import org.jvnet.hk2.guice.bridge.api.GuiceIntoHK2Bridge;

import javax.inject.Inject;
import javax.servlet.ServletContext;

class JerseyConfiguration extends ResourceConfig {
    @Inject
    public JerseyConfiguration(ServiceLocator serviceLocator, ServletContext servletContext) {
        packages("com.example.ws");
        GuiceBridge.getGuiceBridge().initializeGuiceBridge(serviceLocator);
        GuiceIntoHK2Bridge guiceBridge = serviceLocator.getService(GuiceIntoHK2Bridge.class);
        guiceBridge.bridgeGuiceInjector((Injector) servletContext.getAttribute(Injector.class.getName()));
    }
}

在 2.22.1 Jersey 版本中，一切都运行良好。当我更改 2.22.2 上的版本时 - 我遇到了异常:

21-Aug-2016 12:34:12.577 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.filterStart Exception starting filter guiceFilter java.lang.NullPointerException at org.glassfish.jersey.servlet.init.FilterUrlMappingsProviderImpl.getFilterUrlMappings(FilterUrlMappingsProviderImpl.java:66) at org.glassfish.jersey.servlet.ServletContainer.init(ServletContainer.java:444)

我认为 guice-bridge 版本可以解决这个问题。我已将版本 2.4.0-b31 替换为版本 2.4.0-b34(用于 org.glassfish.jersey.core:jersey-server 中的各种 hk2 依赖项) - 没有帮助。

链接到 FilterUrlMappingsProviderImpl 类:https://github.com/jersey/jersey/blob/79d7767be5102f57520cf23900cad3a7ef4230ad/containers/jersey-servlet/src/main/java/org/glassfish/jersey/servlet/init/FilterUrlMappingsProviderImpl.java

从上面描述的 FilterUrlMappingsProviderImpl 类的链接可以清楚地看出，不可能获取 FilterRegistration 类对象。

可能存在什么问题？您对她的决定有何建议？谢谢。

Answer 1

解决方案

<小时/>

文件 web.xml:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <display-name>REST API App</display-name>

    <listener>
        <listener-class>com.example.core.JerseyGuiceServletContextListener</listener-class>
    </listener>

    <filter>
        <filter-name>guiceFilter</filter-name>
        <filter-class>com.google.inject.servlet.GuiceFilter</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>guiceFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <filter>
        <filter-name>jerseyFilter</filter-name>
        <filter-class>org.glassfish.jersey.servlet.ServletContainer</filter-class>
        <init-param>
            <param-name>javax.ws.rs.Application</param-name>
            <param-value>com.example.core.JerseyConfiguration</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>jerseyFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

</web-app>

JerseyServletModuleConfig 类:

package com.example.core;

import com.google.inject.Scopes;
import com.google.inject.servlet.ServletModule;
import com.example.ws.HeyResource;
import org.glassfish.jersey.servlet.ServletContainer;

import java.util.Map;
import java.util.TreeMap;

class JerseyServletModuleConfig extends ServletModule {
    @Override
    protected void configureServlets() {
        bind(HeyResource.class).in(Scopes.SINGLETON);
    }
}