/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.server.handlers;
import io.undertow.Handlers;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.testutils.DefaultServer;
import io.undertow.testutils.HttpClientUtils;
import io.undertow.testutils.TestHttpClient;
import io.undertow.util.StatusCodes;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.junit.After;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.io.IOException;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.atomic.AtomicReference;
/**
* @author Stuart Douglas
*/
@RunWith(DefaultServer.class)
public class GracefulShutdownTestCase {
static final AtomicReference<CountDownLatch> latch1 = new AtomicReference<>();
static final AtomicReference<CountDownLatch> latch2 = new AtomicReference<>();
private static GracefulShutdownHandler shutdown;
@BeforeClass
public static void setup() {
shutdown = Handlers.gracefulShutdown(new HttpHandler() {
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
final CountDownLatch countDownLatch = latch2.get();
final CountDownLatch latch = latch1.get();
if (latch != null) {
latch.countDown();
}
if (countDownLatch != null) {
countDownLatch.await();
}
}
});
DefaultServer.setRootHandler(shutdown);
}
@After
public void after() {
latch1.set(null);
latch2.set(null);
shutdown.start();
}
@Test
public void simpleGracefulShutdownTestCase() throws IOException, InterruptedException {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL() + "/path");
TestHttpClient client = new TestHttpClient();
try {
HttpResponse result = client.execute(get);
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
HttpClientUtils.readResponse(result);
shutdown.shutdown();
result = client.execute(get);
Assert.assertEquals(StatusCodes.SERVICE_UNAVAILABLE, result.getStatusLine().getStatusCode());
HttpClientUtils.readResponse(result);
shutdown.start();
result = client.execute(get);
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
HttpClientUtils.readResponse(result);
CountDownLatch latch = new CountDownLatch(1);
latch2.set(latch);
latch1.set(new CountDownLatch(1));
Thread t = new Thread(new RequestTask());
t.start();
latch1.get().await();
shutdown.shutdown();
Assert.assertFalse(shutdown.awaitShutdown(10));
latch.countDown();
Assert.assertTrue(shutdown.awaitShutdown(10000));
} finally {
client.getConnectionManager().shutdown();
}
}
@Test
public void gracefulShutdownListenerTestCase() throws IOException, InterruptedException {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL() + "/path");
TestHttpClient client = new TestHttpClient();
try {
HttpResponse result = client.execute(get);
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
HttpClientUtils.readResponse(result);
shutdown.shutdown();
result = client.execute(get);
Assert.assertEquals(StatusCodes.SERVICE_UNAVAILABLE, result.getStatusLine().getStatusCode());
HttpClientUtils.readResponse(result);
shutdown.start();
result = client.execute(get);
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
HttpClientUtils.readResponse(result);
CountDownLatch latch = new CountDownLatch(1);
latch2.set(latch);
latch1.set(new CountDownLatch(1));
Thread t = new Thread(new RequestTask());
t.start();
latch1.get().await();
ShutdownListener listener = new ShutdownListener();
shutdown.shutdown();
shutdown.addShutdownListener(listener);
Assert.assertFalse(listener.invoked);
latch.countDown();
long end = System.currentTimeMillis() + 5000;
while (!listener.invoked && System.currentTimeMillis() < end) {
Thread.sleep(10);
}
Assert.assertTrue(listener.invoked);
} finally {
client.getConnectionManager().shutdown();
}
}
private class ShutdownListener implements GracefulShutdownHandler.ShutdownListener {
private volatile boolean invoked = false;
@Override
public synchronized void shutdown(boolean successful) {
invoked = true;
}
}
private final class RequestTask implements Runnable {
@Override
public void run() {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL() + "/path");
TestHttpClient client = new TestHttpClient();
try {
HttpResponse result = client.execute(get);
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
HttpClientUtils.readResponse(result);
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
client.getConnectionManager().shutdown();
}
}
}
}