What should we use for ClientResponse and GenericType in latest version (3.0.x) Resteasy? - resteasy

Question

I am developing Resteasy. I migrated my application's maven dependencies from 2.2.x to 3.0.x and suddenly I saw most of the API's are deprecated. So this migration has affect to my code and test cases as its simply saying deprecated in my whole code.
I am taking example of my test cases:
Test case with earlier version(in latest version it deprectaed as mentioned in link: ClientRequestFactory RestEasy Deprecated... Any other RestEasy alternative ?):
import org.jboss.resteasy.util.GenericType;
import org.jboss.resteasy.client.ClientRequest;
import org.jboss.resteasy.client.ClientResponse;
#Test
public void testGetStudent() throws Exception{
String str = "http://localhost:8080/RESTfulExample/rest/restwebservice/list";
ClientRequest request = new ClientRequest(str);
ClientResponse<List<Student>> response = request.get(new GenericType<List<Student>>(){});
List<Student> students = response.getEntity();
System.out.println("Size : "+students.size());
}
So I refactore my test case to use
#Test
public void testGetStudents(){
final String str = "http://localhost:8080/RESTfulExample/rest/restwebservice/list";
Client client = ClientBuilder.newClient();
// Client client = ClientBuilder.newBuilder().build(); // This also works, OR
Response response = client.target(str).request().get();
// This will gives us whole XML output
String s = response.readEntity(String.class);
System.out.println(s);
**What is the replacement of below two lines in latest version? How I can get List of Student Object ?**
// ClientResponse<List<Student>> response = request.get(new GenericType<List<Student>>(){});
// List<Student> students = response.getEntity();
}
Please guide. What is the replacement of below two lines in latest version? How I can get List of Student Object ?
Edit-1: I tried below, but giving following error:
Students.java
#XmlAccessorType(XmlAccessType.NONE)
#XmlRootElement(name = "students")
public class Students {
#XmlElement(name="student")
private ArrayList<Student> users;
public ArrayList<Student> getUsers() {
return users;
}
public void setUsers(ArrayList<Student> users) {
this.users = users;
}
}
But its giving me errors:
#Test
public void testGetStudents(){
final String str = "http://localhost:8080/RESTfulExample/rest/restwebservice/list";
Client client = ClientBuilder.newClient();
// Client client = ClientBuilder.newBuilder().build(); // This also works, OR
Response response = client.target(str).request().get();
// This will gives us whole XML output
String stringOutput = response.readEntity(String.class);
System.out.println("STATUS : "+response.getStatus());
System.out.println(stringOutput);
Students students = response.readEntity(Students.class);
System.out.println("Size : "+students.getUsers().size());
}
java.lang.IllegalStateException: RESTEASY003765: Response is closed.
at org.jboss.resteasy.specimpl.BuiltResponse.abortIfClosed(BuiltResponse.java:256)
at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.abortIfClosed(ClientResponse.java:328)
at org.jboss.resteasy.client.jaxrs.internal.ClientResponse.readEntity(ClientResponse.java:152)
at org.jboss.resteasy.specimpl.BuiltResponse.readEntity(BuiltResponse.java:219)
at com.mkyong.rest.test.RestEasySampleTest.testGetStudents(RestEasySampleTest.java:46)
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:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

Answer 1

The Resteasy Client-API has been marked deprecated as JAX-RS standardized a Client-API. You can now use the equivalent javax.ws.rs classes:
javax.ws.rs.client.Client client = javax.ws.rs.client.ClientBuilder.newClient();
javax.ws.rs.client.WebTarget target = client.target("someUrl");
List<Student> students =
target.request().get(new javax.ws.rs.core.GenericType<List<Student>>() {});

Answer 2

Here's an example with query parameters and a check for the HTTP response code, which is handy for failing fast and avoiding stack traces from the JSON mapper, often hiding the real cause:
Response response = null;
try {
response = target.path("apiMethod")
.queryParam("stringParam", "test")
.queryParam("booleanParam", Boolean.FALSE)
.request().accept(MediaType.APPLICATION_JSON).get();
if (response.getStatus() == Response.Status.BAD_REQUEST.getStatusCode()) { // HTTP 400
throw new BadRequestException("invalid parameters!");
} else if (response.getStatus() ==
Response.Status.NOT_FOUND.getStatusCode()) { // HTTP 404
throw new NotFoundException("resource was not found on server!");
}
List<MyPojo> result = response.readEntity(new GenericType<List<MyPojo>>(){});
return result;
} finally {
if (response != null) {
response.close();
}
}