/*
* 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.methods.HttpGet;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
/**
* @author Stuart Douglas
*/
@RunWith(DefaultServer.class)
public class RequestLimitingHandlerTestCase {
public static final int N_THREADS = 10;
private static volatile CountDownLatch latch = new CountDownLatch(1);
static final AtomicInteger count = new AtomicInteger();
@BeforeClass
public static void setup() {
DefaultServer.setRootHandler(new BlockingHandler(Handlers.requestLimitingHandler(2, N_THREADS, new HttpHandler() {
@Override
public void handleRequest(HttpServerExchange exchange) throws Exception {
int res = count.incrementAndGet();
try {
if (!latch.await(20, TimeUnit.SECONDS)) {
exchange.setStatusCode(500);
} else {
exchange.getOutputStream().write(("" + res).getBytes("US-ASCII"));
}
} finally {
count.decrementAndGet();
}
}
})));
}
@Test
public void testRateLimitingHandler() throws ExecutionException, InterruptedException {
latch.countDown();
latch = new CountDownLatch(1);
ExecutorService executor = Executors.newFixedThreadPool(N_THREADS);
try {
final List<Future<?>> futures = new ArrayList<>();
for (int i = 0; i < N_THREADS; ++i) {
futures.add(executor.submit(new Callable<String>() {
@Override
public String call() {
TestHttpClient client = new TestHttpClient();
try {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL());
HttpResponse result = client.execute(get);
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
return HttpClientUtils.readResponse(result);
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
client.getConnectionManager().shutdown();
}
}
}));
}
Thread.sleep(300);
latch.countDown();
for (Future<?> future : futures) {
String res = (String) future.get();
Assert.assertTrue(res, res.equals("1") || res.equals("2"));
}
} finally {
executor.shutdown();
}
}
@Test
public void testRateLimitingHandlerQueueFull() throws ExecutionException, InterruptedException {
latch.countDown();
latch = new CountDownLatch(1);
ExecutorService executor = Executors.newFixedThreadPool(N_THREADS * 2);
try {
final List<Future<?>> futures = new ArrayList<>();
for (int i = 0; i < N_THREADS * 2; ++i) {
futures.add(executor.submit(new Callable<String>() {
@Override
public String call() {
TestHttpClient client = new TestHttpClient();
try {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL());
HttpResponse result = client.execute(get);
if(result.getStatusLine().getStatusCode() == 513) {
return "513";
}
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
return HttpClientUtils.readResponse(result);
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
client.getConnectionManager().shutdown();
}
}
}));
}
Thread.sleep(300);
latch.countDown();
for (Future<?> future : futures) {
String res = (String) future.get();
Assert.assertTrue(res, res.equals("1") || res.equals("2") || res.equals("513"));
}
futures.clear();
for (int i = 0; i < 2; ++i) {
futures.add(executor.submit(new Callable<String>() {
@Override
public String call() {
TestHttpClient client = new TestHttpClient();
try {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL());
HttpResponse result = client.execute(get);
Assert.assertEquals(StatusCodes.OK, result.getStatusLine().getStatusCode());
return HttpClientUtils.readResponse(result);
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
client.getConnectionManager().shutdown();
}
}
}));
}
for (Future<?> future : futures) {
String res = (String) future.get();
Assert.assertTrue(res, res.equals("1") || res.equals("2"));
}
} finally {
executor.shutdown();
}
}
}