TestHttp1AsyncStatefulConnManagement.java
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.hc.client5.testing.async;
import java.util.concurrent.Future;
import org.apache.hc.client5.http.async.methods.SimpleHttpRequest;
import org.apache.hc.client5.http.async.methods.SimpleHttpResponse;
import org.apache.hc.client5.http.async.methods.SimpleRequestBuilder;
import org.apache.hc.client5.http.impl.async.CloseableHttpAsyncClient;
import org.apache.hc.client5.http.impl.nio.PoolingAsyncClientConnectionManager;
import org.apache.hc.client5.http.protocol.HttpClientContext;
import org.apache.hc.client5.testing.extension.async.ClientProtocolLevel;
import org.apache.hc.client5.testing.extension.async.ServerProtocolLevel;
import org.apache.hc.client5.testing.extension.async.TestAsyncClient;
import org.apache.hc.core5.http.ContentType;
import org.apache.hc.core5.http.EndpointDetails;
import org.apache.hc.core5.http.HttpHost;
import org.apache.hc.core5.http.HttpResponse;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.URIScheme;
import org.apache.hc.core5.http.protocol.HttpContext;
import org.apache.hc.core5.http.protocol.HttpCoreContext;
import org.apache.hc.core5.net.URIAuthority;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
class TestHttp1AsyncStatefulConnManagement extends AbstractIntegrationTestBase {
public TestHttp1AsyncStatefulConnManagement() {
super(URIScheme.HTTP, ClientProtocolLevel.STANDARD, ServerProtocolLevel.STANDARD);
}
@Test
void testStatefulConnections() throws Exception {
configureServer(bootstrap -> bootstrap.register("*", () -> new AbstractSimpleServerExchangeHandler() {
@Override
protected SimpleHttpResponse handle(
final SimpleHttpRequest request,
final HttpCoreContext context) {
final SimpleHttpResponse response = new SimpleHttpResponse(HttpStatus.SC_OK);
response.setBody("Whatever", ContentType.TEXT_PLAIN);
return response;
}
}));
final HttpHost target = startServer();
configureClient(builder -> builder
.setUserTokenHandler((route, context) -> context.getAttribute("user")));
final TestAsyncClient client = startClient();
final int workerCount = 2;
final int requestCount = 5;
final HttpContext[] contexts = new HttpContext[workerCount];
final HttpWorker[] workers = new HttpWorker[workerCount];
for (int i = 0; i < contexts.length; i++) {
final HttpClientContext context = HttpClientContext.create();
contexts[i] = context;
workers[i] = new HttpWorker(
"user" + i,
context, requestCount, target, client);
}
for (final HttpWorker worker : workers) {
worker.start();
}
for (final HttpWorker worker : workers) {
worker.join(TIMEOUT.toMilliseconds());
}
for (final HttpWorker worker : workers) {
final Exception ex = worker.getException();
if (ex != null) {
throw ex;
}
Assertions.assertEquals(requestCount, worker.getCount());
}
for (final HttpContext context : contexts) {
final String state0 = (String) context.getAttribute("r0");
Assertions.assertNotNull(state0);
for (int r = 1; r < requestCount; r++) {
Assertions.assertEquals(state0, context.getAttribute("r" + r));
}
}
}
static class HttpWorker extends Thread {
private final String uid;
private final HttpClientContext context;
private final int requestCount;
private final HttpHost target;
private final CloseableHttpAsyncClient httpclient;
private volatile Exception exception;
private volatile int count;
public HttpWorker(
final String uid,
final HttpClientContext context,
final int requestCount,
final HttpHost target,
final CloseableHttpAsyncClient httpclient) {
super();
this.uid = uid;
this.context = context;
this.requestCount = requestCount;
this.target = target;
this.httpclient = httpclient;
this.count = 0;
}
public int getCount() {
return count;
}
public Exception getException() {
return exception;
}
@Override
public void run() {
try {
context.setAttribute("user", uid);
for (int r = 0; r < requestCount; r++) {
final SimpleHttpRequest request = SimpleRequestBuilder.get()
.setHttpHost(target)
.setPath("/")
.build();
final Future<SimpleHttpResponse> future = httpclient.execute(request, null);
future.get();
count++;
final EndpointDetails endpointDetails = context.getEndpointDetails();
final String connuid = Integer.toHexString(System.identityHashCode(endpointDetails));
context.setAttribute("r" + r, connuid);
}
} catch (final Exception ex) {
exception = ex;
}
}
}
@Test
void testRouteSpecificPoolRecylcing() throws Exception {
configureServer(bootstrap -> bootstrap.register("*", () -> new AbstractSimpleServerExchangeHandler() {
@Override
protected SimpleHttpResponse handle(
final SimpleHttpRequest request,
final HttpCoreContext context) {
final SimpleHttpResponse response = new SimpleHttpResponse(HttpStatus.SC_OK);
response.setBody("Whatever", ContentType.TEXT_PLAIN);
return response;
}
}));
final HttpHost target = startServer();
// This tests what happens when a maxed connection pool needs
// to kill the last idle connection to a route to build a new
// one to the same route.
configureClient(builder -> builder
.setUserTokenHandler((route, context) -> context.getAttribute("user")));
final TestAsyncClient client = startClient();
final PoolingAsyncClientConnectionManager connManager = client.getConnectionManager();
final int maxConn = 2;
// We build a client with 2 max active // connections, and 2 max per route.
connManager.setMaxTotal(maxConn);
connManager.setDefaultMaxPerRoute(maxConn);
// Bottom of the pool : a *keep alive* connection to Route 1.
final HttpContext context1 = HttpClientContext.create();
context1.setAttribute("user", "stuff");
final SimpleHttpRequest request1 = SimpleRequestBuilder.get()
.setHttpHost(target)
.setPath("/")
.build();
final Future<SimpleHttpResponse> future1 = client.execute(request1, context1, null);
final HttpResponse response1 = future1.get();
Assertions.assertNotNull(response1);
Assertions.assertEquals(200, response1.getCode());
// The ConnPoolByRoute now has 1 free connection, out of 2 max
// The ConnPoolByRoute has one RouteSpcfcPool, that has one free connection
// for [localhost][stuff]
Thread.sleep(100);
// Send a very simple HTTP get (it MUST be simple, no auth, no proxy, no 302, no 401, ...)
// Send it to another route. Must be a keepalive.
final HttpContext context2 = HttpClientContext.create();
final SimpleHttpRequest request2 = SimpleRequestBuilder.get()
.setScheme(target.getSchemeName())
.setAuthority(new URIAuthority("127.0.0.1", target.getPort()))
.setPath("/")
.build();
final Future<SimpleHttpResponse> future2 = client.execute(request2, context2, null);
final HttpResponse response2 = future2.get();
Assertions.assertNotNull(response2);
Assertions.assertEquals(200, response2.getCode());
// ConnPoolByRoute now has 2 free connexions, out of its 2 max.
// The [localhost][stuff] RouteSpcfcPool is the same as earlier
// And there is a [127.0.0.1][null] pool with 1 free connection
Thread.sleep(100);
// This will put the ConnPoolByRoute to the targeted state :
// [localhost][stuff] will not get reused because this call is [localhost][null]
// So the ConnPoolByRoute will need to kill one connection (it is maxed out globally).
// The killed conn is the oldest, which means the first HTTPGet ([localhost][stuff]).
// When this happens, the RouteSpecificPool becomes empty.
final HttpContext context3 = HttpClientContext.create();
final SimpleHttpRequest request3 = SimpleRequestBuilder.get()
.setHttpHost(target)
.setPath("/")
.build();
final Future<SimpleHttpResponse> future3 = client.execute(request3, context3, null);
final HttpResponse response3 = future3.get();
Assertions.assertNotNull(response3);
Assertions.assertEquals(200, response3.getCode());
}
}