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package org.glassfish.jersey.jetty;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import java.util.concurrent.atomic.AtomicInteger;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.container.AsyncResponse;
import javax.ws.rs.container.Suspended;
import javax.ws.rs.container.TimeoutHandler;
import javax.ws.rs.core.Response;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertThat;
/**
* @author Arul Dhesiaseelan (aruld at acm.org)
* @author Michal Gajdos (michal.gajdos at oracle.com)
*/
public class AsyncTest extends AbstractJettyServerTester {
@Path("/async")
@SuppressWarnings("VoidMethodAnnotatedWithGET")
public static class AsyncResource {
public static AtomicInteger INVOCATION_COUNT = new AtomicInteger(0);
@GET
public void asyncGet(@Suspended final AsyncResponse asyncResponse) {
new Thread(new Runnable() {
@Override
public void run() {
final String result = veryExpensiveOperation();
asyncResponse.resume(result);
}
private String veryExpensiveOperation() {
// ... very expensive operation that typically finishes within 5 seconds, simulated using sleep()
try {
Thread.sleep(5000);
} catch (final InterruptedException e) {
// ignore
}
return "DONE";
}
}).start();
}
@GET
@Path("timeout")
public void asyncGetWithTimeout(@Suspended final AsyncResponse asyncResponse) {
asyncResponse.setTimeoutHandler(new TimeoutHandler() {
@Override
public void handleTimeout(final AsyncResponse asyncResponse) {
asyncResponse.resume(Response.status(Response.Status.SERVICE_UNAVAILABLE).entity("Operation time out.")
.build());
}
});
asyncResponse.setTimeout(3, TimeUnit.SECONDS);
new Thread(new Runnable() {
@Override
public void run() {
final String result = veryExpensiveOperation();
asyncResponse.resume(result);
}
private String veryExpensiveOperation() {
// ... very expensive operation that typically finishes within 10 seconds, simulated using sleep()
try {
Thread.sleep(7000);
} catch (final InterruptedException e) {
// ignore
}
return "DONE";
}
}).start();
}
@GET
@Path("multiple-invocations")
public void asyncMultipleInvocations(@Suspended final AsyncResponse asyncResponse) {
INVOCATION_COUNT.incrementAndGet();
new Thread(new Runnable() {
@Override
public void run() {
asyncResponse.resume("OK");
}
}).start();
}
}
private Client client;
@Before
public void setUp() throws Exception {
startServer(AsyncResource.class);
client = ClientBuilder.newClient();
}
@Override
@After
public void tearDown() {
super.tearDown();
client = null;
}
@Test
public void testAsyncGet() throws ExecutionException, InterruptedException {
final Future<Response> responseFuture = client.target(getUri().path("/async")).request().async().get();
// Request is being processed asynchronously.
final Response response = responseFuture.get();
// get() waits for the response
assertEquals("DONE", response.readEntity(String.class));
}
@Test
public void testAsyncGetWithTimeout() throws ExecutionException, InterruptedException, TimeoutException {
final Future<Response> responseFuture = client.target(getUri().path("/async/timeout")).request().async().get();
// Request is being processed asynchronously.
final Response response = responseFuture.get();
// get() waits for the response
assertEquals(503, response.getStatus());
assertEquals("Operation time out.", response.readEntity(String.class));
}
/**
* JERSEY-2616 reproducer. Make sure resource method is only invoked once per one request.
*/
@Test
public void testAsyncMultipleInvocations() throws Exception {
final Response response = client.target(getUri().path("/async/multiple-invocations")).request().get();
assertThat(AsyncResource.INVOCATION_COUNT.get(), is(1));
assertThat(response.getStatus(), is(200));
assertThat(response.readEntity(String.class), is("OK"));
}
}