旧项目上的 Jetty 和 Jersey 404 错误

Question

作为我工作的一部分，我正在尝试更新我们的一些服务，其中一项正在使用 Jetty & Jersey 进行部署。不幸的是，代码非常旧（一些依赖项来自 2014 年），并且在编译和服务器启动时，每当我运行它来自我的 IDE 和 mvn jetty:run 时，根目录显示 Directory / 消息正确，而对于所有其他 URL，我收到错误 404 NOT FOUND.

我在控制台上没有收到任何 warning/error 消息，我也不知道为什么会这样。我搜索了很多，但代码似乎是正确的，唯一缺少的是 web.xml，但我认为 Jetty 是嵌入式的，我需要指出的是，这段代码已经运行投入生产作为 JAR。

您可以在下面看到一些文件：

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.sample</groupId>
    <artifactId>sample</artifactId>
    <version>2.0</version>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.2.2.v20140723</version>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.21</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.21</version>
        </dependency>

        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-server</artifactId>
            <version>9.2.3.v20140905</version>
        </dependency>
        <dependency>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-servlet</artifactId>
            <version>9.2.3.v20140905</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.core</groupId>
            <artifactId>jersey-server</artifactId>
            <version>2.7</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet-core</artifactId>
            <version>2.7</version>
        </dependency>
        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-jetty-http</artifactId>
            <version>2.7</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>2.7</version>
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-moxy</artifactId>
            <version>2.7</version>
        </dependency>

        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20160212</version>
        </dependency>

    </dependencies>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

</project>

参考下面的class启动服务器：
ApiService.java


import com.simple.api.restendpoint.*;
import org.apache.log4j.Logger;
import org.eclipse.jetty.http.HttpVersion;
import org.eclipse.jetty.server.*;
import org.eclipse.jetty.server.handler.IPAccessHandler;
import org.eclipse.jetty.servlet.ServletContextHandler;
import org.eclipse.jetty.servlet.ServletHolder;
import org.eclipse.jetty.util.ssl.SslContextFactory;
import org.eclipse.jetty.util.thread.QueuedThreadPool;
import org.glassfish.jersey.server.ResourceConfig;
import org.glassfish.jersey.servlet.ServletContainer;

import java.util.HashSet;
import java.util.Set;


public class ApiService {
    Logger log = Logger.getLogger(ApiService.class);
    
    private static ApiService instance;
    private final Server server;

    private ApiService(){
        //CREATE CONFIG
        Set<Class<?>> s = new HashSet<>();
        s.add(restEndpoint.class);      

        ResourceConfig config = new ResourceConfig(s);

        //CREATE CONTAINER
        ServletContainer container = new ServletContainer(config);

        //CREATE CONTEXT
        ServletContextHandler context = new ServletContextHandler();
        context.setContextPath("/");
        context.addServlet(new ServletHolder(container),"/*");

        //CREATE RPC SERVER
        QueuedThreadPool threadPool = new QueuedThreadPool();
        threadPool.setMaxThreads(50);
        server = new Server(threadPool);

        server.setHandler(context);

        ServerConnector connector = new ServerConnector(server);
        connector.setPort(8080);

        server.addConnector(connector);

        SslContextFactory sslContextFactory = new SslContextFactory();
        sslContextFactory.setKeyStorePath("testkeystore");
        sslContextFactory.setKeyStorePassword("testkeystore");
        sslContextFactory.setKeyManagerPassword("testkeystore");

        // SSL HTTP Configuration
        HttpConfiguration https_config = new HttpConfiguration();
        https_config.addCustomizer(new SecureRequestCustomizer());

        // SSL Connector
        ServerConnector sslConnector = new ServerConnector(server,
            new SslConnectionFactory(sslContextFactory,HttpVersion.HTTP_1_1.asString()),
            new HttpConnectionFactory(https_config));
        sslConnector.setPort(Settings.getInstance().getRpcPort());
        server.addConnector(sslConnector);
        
    }

    public static ApiService getInstance() {
        if (instance==null) {
            instance = new ApiService();
        }
        return instance;
    }

    public void start() {
        try {
            //START RPC 
            server.start();
            server.join();
            log.info("Server started");
        }
        catch (Exception e) {
            //FAILED TO START RPC
            log.error("Error starting server");
        } finally {
            server.destroy();
        }
    }
}

restEndpoint.java

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.container.Suspended;
import javax.ws.rs.core.Context;
import org.apache.log4j.Logger;
import org.json.JSONArray;
import org.json.JSONObject;

@Path("/v4/restEndpoint")
@Produces({"application/json"})
public class restEndpoint {
    Logger log = Logger.getLogger(restEndpoint.class);

    private static final String VERSION = "v4";

    private static final ExecutorService executors = Executors.newFixedThreadPool(20);

    @Context
    HttpServletRequest request;

    @GET
    @Path("/getsamplejson")
    public void getSampleJson(@Suspended final AsyncResponse asyncResponse) {
        executors.execute(new Runnable() {
            @Override
            public void run() {
                String result = veryExpensiveOperation();
                asyncResponse.resume(result);
            }

            private String veryExpensiveOperation() {
                JSONObject sampleJson = new JSONObject().put("test", 0);
                return sampleJson.toString();
            }
        });
    }
}

知道为什么会这样吗？ http://localhost:8080/v4/restEndpoint/getsamplejson returns 404 NOT FOUND http://localhost:8080/ 显示 Directory: /

我是否应该尝试将其构建为 JAR 并通过它运行而不是使用 mvn jetty:run 命令？

Answer 1

您有一个 embedded-jetty 实例，从代码开始。

您提供的 ApiService 来源证明了这一点。

您不能使用 jetty-maven-plugin 来管理/启动 / 运行 class。

jetty-maven-plugin 专门用于处理网络应用程序，可以作为 WAR 打包文件，也可以作为展开的网络应用程序目录。（webapps 将有一个 WEB-INF/web.xml 和/或 Servlet 在其中注释 classes）

您需要使用项目独有的其他方式启动服务器，可能是某种主要 class 或测试用例，最终实例化 ApiService 并调用 .start()就可以了。

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