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package org.glassfish.jersey.simple;
import org.glassfish.jersey.server.ResourceConfig;
import org.junit.Test;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.WebTarget;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.logging.Level;
import java.util.logging.Logger;
import static org.junit.Assert.assertEquals;
/**
* Tests the parallel execution of multiple requests.
*
* @author Stepan Kopriva (stepan.kopriva at oracle.com)
* @author Arul Dhesiaseelan (aruld at acm.org)
*/
public class ParallelTest extends AbstractSimpleServerTester {
// Server-side dispatcher and selector pool configuration
private static final int selectorThreads = Runtime.getRuntime().availableProcessors();
private static final int dispatcherThreads = Math.max(8, selectorThreads * 2);
private static final int numberOfThreads = 100;
private static final String PATH = "test";
private static AtomicInteger receivedCounter = new AtomicInteger(0);
private static AtomicInteger resourceCounter = new AtomicInteger(0);
private static CountDownLatch latch = new CountDownLatch(numberOfThreads);
@Path(PATH)
public static class MyResource {
@GET
public String get() {
this.sleep();
resourceCounter.addAndGet(1);
return "GET";
}
private void sleep() {
try {
Thread.sleep(10);
} catch (InterruptedException ex) {
Logger.getLogger(ParallelTest.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
private class ResourceThread extends Thread {
private WebTarget target;
private String path;
public ResourceThread(WebTarget target, String path) {
this.target = target;
this.path = path;
}
@Override
public void run() {
assertEquals("GET", target.path(path).request().get(String.class));
receivedCounter.addAndGet(1);
latch.countDown();
}
}
@Test
public void testParallel() {
ResourceConfig config = new ResourceConfig(MyResource.class);
startServer(config, dispatcherThreads, selectorThreads);
WebTarget target = ClientBuilder.newClient().target(getUri().path("/").build());
for (int i = 1; i <= numberOfThreads; i++) {
ResourceThread rt = new ResourceThread(target, PATH);
rt.start();
}
try {
latch.await();
} catch (InterruptedException ex) {
Logger.getLogger(ParallelTest.class.getName()).log(Level.SEVERE, null, ex);
}
int result = receivedCounter.get();
assertEquals(numberOfThreads, result);
}
}