多个版本的 REST Web 服务 - 实施错误

Question

我正在尝试创建 web 服务的 v2。为此，我创建了一个新包 com.package.v2，其中声明了远程接口。如果我保持 v2 的类名与 v1 相同，那么在部署到 glassfish 服务器时会出错。

SEVERE|glassfish3.1.2|com.sun.jersey.spi.inject.Errors|_ThreadID=61;_ThreadName=Thread-2;|The following errors and warnings have been detected with resource and/or provider classes:
SEVERE: The class com.package.v2.TestRESTServiceBA is an interface and cannot be instantiated.|#]

如果我将 v2 类重命名为不同的名称，那么一切正常。请告诉我如何让两个版本保持同名？

更多详情： INFO|glassfish3.1.2|com.sun.jersey.api.core.ScanningResourceConfig|_ThreadID=61;_ThreadName=Thread-2;|找到的根资源类：

接口 com.package.v2.TestRESTServiceBA

接口 com.package.v1.TestRESTServiceBA

添加代码：

版本 1 接口

package com.package.v1;

import java.util.Map;
import javax.ejb.Remote;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import com.package.common.dto.ResponseDTO;

@Remote
@Path("/v1/test")
public interface TestRESTServiceBA {

    @GET
    @Path("/headers")
    @Produces("application/json")
    ResponseDTO<Map<String, String>> getAllHeaders();
}

版本 1 实现

package com.package.v1;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import javax.ejb.Stateless;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.Context;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.package.common.dto.ResponseDTO;
import com.package.v1.TestRESTServiceBA;

@Stateless
public class TestRESTServiceBABean implements TestRESTServiceBA {

    private static final Log LOG = LogFactory.getLog(TestRESTServiceBABean.class);

    @Context
    private HttpServletRequest request;

    public TestRESTServiceBABean() {
    }

    @Override
    public ResponseDTO<Map<String, String>> getAllHeaders() {
        LOG.info("GET:v1/test/headers requested!");
        final ResponseDTO<Map<String, String>> response = new ResponseDTO<>();
        return response;
    }
}

版本 2 界面 包 com.package.v2;

import java.util.Map;
import javax.ejb.Remote;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import com.package.common.dto.ResponseDTO;

@Remote
@Path("/v2/test")
public interface TestRESTServiceBA2 {

    @GET
    @Path("/headers")
    @Produces("application/json")
    ResponseDTO<Map<String, String>> getAllHeaders();
}

第 2 版实施 包 com.package.v2;

import java.util.HashMap;
import java.util.Map;
import javax.ejb.Stateless;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.Context;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.package.common.dto.ResponseDTO;
import com.package.common.model.DealerSpeedUser;
import com.package.v2.TestRESTServiceBA2;


@Stateless
public class TestRESTServiceBABean implements TestRESTServiceBA {

    private static final Log LOG = LogFactory.getLog(TestRESTServiceBABean2.class);

    @Context
    private HttpServletRequest request;

    public TestRESTServiceBABean2() {
    }

    @Override
    public ResponseDTO<Map<String, String>> getAllHeaders() {
        LOG.info("GET:v2/test/headers requested!");

        final ResponseDTO<Map<String, String>> response = new ResponseDTO<>();
        return response;
    }
}

Answer 1

错误是告诉你它不能创建接口的实例，因为你在接口类上放了@Path@GET、@Produces等注解。将这些注释移至 TestRESTServiceBABean 类。