Multiple versions of REST web service - Implementation error - web-services

Question

I am trying to create a v2 of a web service. For this I created a new package com.package.v2 where the remote interface has been declared. If I keep the class name of v2 same as v1, then I get an error during the deployment to glassfish server.
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.|#]
If I rename the v2 class to a different name then everything works fine. Can you please let me know how I can keep both the version with the same name?
More details:
INFO|glassfish3.1.2|com.sun.jersey.api.core.ScanningResourceConfig|_ThreadID=61;_ThreadName=Thread-2;|Root resource classes found:
interface com.package.v2.TestRESTServiceBA
interface com.package.v1.TestRESTServiceBA
Adding Code:
Version 1 Interface
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();
}
Version 1 Implementation
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;
}
}
Version 2 interface
package 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();
}
Version 2 Implementation
package 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

The error is telling you it can't create an instance of an interface because you've put the #Path #GET, #Produces, etc. annotations on the interface classes. Move those annotations to the TestRESTServiceBABean classes instead.