/*
* JBoss, Home of Professional Open Source.
* Copyright 2012 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.proxy;
import io.undertow.Undertow;
import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.server.handlers.ResponseCodeHandler;
import io.undertow.server.session.InMemorySessionManager;
import io.undertow.server.session.Session;
import io.undertow.server.session.SessionAttachmentHandler;
import io.undertow.server.session.SessionCookieConfig;
import io.undertow.server.session.SessionManager;
import io.undertow.testutils.DefaultServer;
import io.undertow.testutils.HttpClientUtils;
import io.undertow.testutils.TestHttpClient;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.junit.AfterClass;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import static io.undertow.Handlers.jvmRoute;
import static io.undertow.Handlers.path;
/**
* Tests the load balancing proxy
*
* @author Stuart Douglas
*/
@RunWith(DefaultServer.class)
public class LoadBalancingProxyTestCase {
private static final String COUNT = "count";
private static Undertow server1;
private static Undertow server2;
@BeforeClass
public static void setup() throws URISyntaxException {
final SessionCookieConfig sessionConfig = new SessionCookieConfig();
int port = DefaultServer.getHostPort("default");
server1 = Undertow.builder()
.addListener(port + 1, DefaultServer.getHostAddress("default"))
.setHandler(jvmRoute("JSESSIONID", "s1", path()
.addPrefixPath("/session", new SessionAttachmentHandler(new SessionTestHandler(sessionConfig), new InMemorySessionManager(""), sessionConfig))
.addPrefixPath("/name", new StringSendHandler("server1"))))
.build();
server2 = Undertow.builder()
.addListener(port + 2, DefaultServer.getHostAddress("default"))
.setHandler(jvmRoute("JSESSIONID", "s2", path()
.addPrefixPath("/session", new SessionAttachmentHandler(new SessionTestHandler(sessionConfig), new InMemorySessionManager(""), sessionConfig))
.addPrefixPath("/name", new StringSendHandler("server2"))))
.build();
server1.start();
server2.start();
DefaultServer.setRootHandler(new ProxyHandler(new LoadBalancingProxyClient()
.setConnectionsPerThread(1)
.addHost(new URI("http", null, DefaultServer.getHostAddress("default"), port + 1, null, null, null), "s1")
.addHost(new URI("http", null, DefaultServer.getHostAddress("default"), port + 2, null, null, null), "s2")
, 10000, ResponseCodeHandler.HANDLE_404));
}
@AfterClass
public static void teardown() {
server1.stop();
server2.stop();
}
@Test
public void testLoadShared() throws IOException {
final StringBuilder resultString = new StringBuilder();
for (int i = 0; i < 6; ++i) {
TestHttpClient client = new TestHttpClient();
try {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL() + "/name");
HttpResponse result = client.execute(get);
Assert.assertEquals(200, result.getStatusLine().getStatusCode());
resultString.append(HttpClientUtils.readResponse(result));
resultString.append(' ');
} finally {
client.getConnectionManager().shutdown();
}
}
Assert.assertTrue(resultString.toString().contains("server1"));
Assert.assertTrue(resultString.toString().contains("server2"));
}
@Test
public void testLoadSharedWithServerShutdown() throws IOException {
final StringBuilder resultString = new StringBuilder();
for (int i = 0; i < 6; ++i) {
TestHttpClient client = new TestHttpClient();
try {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL() + "/name");
HttpResponse result = client.execute(get);
Assert.assertEquals(200, result.getStatusLine().getStatusCode());
resultString.append(HttpClientUtils.readResponse(result));
resultString.append(' ');
} finally {
client.getConnectionManager().shutdown();
}
server1.stop();
server1.start();
server2.stop();
server2.start();
}
Assert.assertTrue(resultString.toString().contains("server1"));
Assert.assertTrue(resultString.toString().contains("server2"));
}
@Test
public void testStickySessions() throws IOException {
int expected = 0;
TestHttpClient client = new TestHttpClient();
try {
for (int i = 0; i < 6; ++i) {
HttpGet get = new HttpGet(DefaultServer.getDefaultServerURL() + "/session");
get.addHeader("Connection", "close");
HttpResponse result = client.execute(get);
Assert.assertEquals(200, result.getStatusLine().getStatusCode());
int count = Integer.parseInt(HttpClientUtils.readResponse(result));
Assert.assertEquals(expected++, count);
}
} finally {
client.getConnectionManager().shutdown();
}
}
private static final class SessionTestHandler implements HttpHandler {
private final SessionCookieConfig sessionConfig;
private SessionTestHandler(SessionCookieConfig sessionConfig) {
this.sessionConfig = sessionConfig;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
final SessionManager manager = exchange.getAttachment(SessionManager.ATTACHMENT_KEY);
Session session = manager.getSession(exchange, sessionConfig);
if (session == null) {
session = manager.createSession(exchange, sessionConfig);
session.setAttribute(COUNT, 0);
}
Integer count = (Integer) session.getAttribute(COUNT);
session.setAttribute(COUNT, count + 1);
exchange.getResponseSender().send("" + count);
}
}
private static final class StringSendHandler implements HttpHandler {
private final String serverName;
private StringSendHandler(String serverName) {
this.serverName = serverName;
}
@Override
public void handleRequest(final HttpServerExchange exchange) throws Exception {
exchange.getResponseSender().send(serverName);
}
}
}