1 /*

     2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 package jdk.incubator.http;

    25 

    26 import java.io.IOException;

    27 import java.lang.management.ManagementFactory;

    28 import java.net.Authenticator;

    29 import java.net.CookieHandler;

    30 import java.net.InetSocketAddress;

    31 import java.net.ProxySelector;

    32 import java.nio.ByteBuffer;

    33 import java.nio.channels.SocketChannel;

    34 import java.util.List;

    35 import java.util.Optional;

    36 import java.util.Random;

    37 import java.util.concurrent.CompletableFuture;

    38 import java.util.concurrent.Executor;

    39 import java.util.concurrent.Flow;

    40 import java.util.stream.IntStream;

    41 import java.time.Instant;

    42 import java.time.temporal.ChronoUnit;

    43 import javax.net.ssl.SSLContext;

    44 import javax.net.ssl.SSLParameters;

    45 import jdk.incubator.http.internal.common.FlowTube;

    46 

    47 /**

    48  * @summary Verifies that the ConnectionPool correctly handle

    49  *          connection deadlines and purges the right connections

    50  *          from the cache.

    51  * @bug 8187044 8187111

    52  * @author danielfuchs

    53  */

    54 public class ConnectionPoolTest {

    55 

    56     static long getActiveCleaners() throws ClassNotFoundException {

    57         // ConnectionPool.ACTIVE_CLEANER_COUNTER.get()

    58         // ConnectionPoolTest.class.getModule().addReads(

    59         //      Class.forName("java.lang.management.ManagementFactory").getModule());

    60         return java.util.stream.Stream.of(ManagementFactory.getThreadMXBean()

    61                 .dumpAllThreads(false, false))

    62               .filter(t -> t.getThreadName().startsWith("HTTP-Cache-cleaner"))

    63               .count();

    64     }

    65 

    66     public static void main(String[] args) throws Exception {

    67         testCacheCleaners();

    68     }

    69 

    70     public static void testCacheCleaners() throws Exception {

    71         ConnectionPool pool = new ConnectionPool(666);

    72         HttpClient client = new HttpClientStub(pool);

    73         InetSocketAddress proxy = InetSocketAddress.createUnresolved("bar", 80);

    74         System.out.println("Adding 10 connections to pool");

    75         Random random = new Random();

    76 

    77         final int count = 20;

    78         Instant now = Instant.now().truncatedTo(ChronoUnit.SECONDS);

    79         int[] keepAlives = new int[count];

    80         HttpConnectionStub[] connections = new HttpConnectionStub[count];

    81         long purge = pool.purgeExpiredConnectionsAndReturnNextDeadline(now);

    82         long expected = 0;

    83         if (purge != expected) {

    84             throw new RuntimeException("Bad purge delay: " + purge

    85                                         + ", expected " + expected);

    86         }

    87         expected = Long.MAX_VALUE;

    88         for (int i=0; i<count; i++) {

    89             InetSocketAddress addr = InetSocketAddress.createUnresolved("foo"+i, 80);

    90             keepAlives[i] = random.nextInt(10) * 10  + 10;

    91             connections[i] = new HttpConnectionStub(client, addr, proxy, true);

    92             System.out.println("Adding connection: " + now

    93                                 + " keepAlive: " + keepAlives[i]

    94                                 + " /" + connections[i]);

    95             pool.returnToPool(connections[i], now, keepAlives[i]);

    96             expected = Math.min(expected, keepAlives[i] * 1000);

    97             purge = pool.purgeExpiredConnectionsAndReturnNextDeadline(now);

    98             if (purge != expected) {

    99                 throw new RuntimeException("Bad purge delay: " + purge

   100                                         + ", expected " + expected);

   101             }

   102         }

   103         int min = IntStream.of(keepAlives).min().getAsInt();

   104         int max = IntStream.of(keepAlives).max().getAsInt();

   105         int mean = (min + max)/2;

   106         System.out.println("min=" + min + ", max=" + max + ", mean=" + mean);

   107         purge = pool.purgeExpiredConnectionsAndReturnNextDeadline(now);

   108         System.out.println("first purge would be in " + purge + " ms");

   109         if (Math.abs(purge/1000 - min) > 0) {

   110             throw new RuntimeException("expected " + min + " got " + purge/1000);

   111         }

   112         long opened = java.util.stream.Stream.of(connections)

   113                      .filter(HttpConnectionStub::connected).count();

   114         if (opened != count) {

   115             throw new RuntimeException("Opened: expected "

   116                                        + count + " got " + opened);

   117         }

   118         purge = mean * 1000;

   119         System.out.println("start purging at " + purge + " ms");

   120         Instant next = now;

   121         do {

   122            System.out.println("next purge is in " + purge + " ms");

   123            next = next.plus(purge, ChronoUnit.MILLIS);

   124            purge = pool.purgeExpiredConnectionsAndReturnNextDeadline(next);

   125            long k = now.until(next, ChronoUnit.SECONDS);

   126            System.out.println("now is " + k + "s from start");

   127            for (int i=0; i<count; i++) {

   128                if (connections[i].connected() != (k < keepAlives[i])) {

   129                    throw new RuntimeException("Bad connection state for "

   130                              + i

   131                              + "\n\t connected=" + connections[i].connected()

   132                              + "\n\t keepAlive=" + keepAlives[i]

   133                              + "\n\t elapsed=" + k);

   134                }

   135            }

   136         } while (purge > 0);

   137         opened = java.util.stream.Stream.of(connections)

   138                      .filter(HttpConnectionStub::connected).count();

   139         if (opened != 0) {

   140            throw new RuntimeException("Closed: expected "

   141                                        + count + " got "

   142                                        + (count-opened));

   143         }

   144     }

   145 

   146     static <T> T error() {

   147         throw new InternalError("Should not reach here: wrong test assumptions!");

   148     }

   149 

   150     static class FlowTubeStub implements FlowTube {

   151         final HttpConnectionStub conn;

   152         FlowTubeStub(HttpConnectionStub conn) { this.conn = conn; }

   153         @Override

   154         public void onSubscribe(Flow.Subscription subscription) { }

   155         @Override public void onError(Throwable error) { error(); }

   156         @Override public void onComplete() { error(); }

   157         @Override public void onNext(List<ByteBuffer> item) { error();}

   158         @Override

   159         public void subscribe(Flow.Subscriber<? super List<ByteBuffer>> subscriber) {

   160         }

   161         @Override public boolean isFinished() { return conn.closed; }

   162     }

   163 

   164     // Emulates an HttpConnection that has a strong reference to its HttpClient.

   165     static class HttpConnectionStub extends HttpConnection {

   166 

   167         public HttpConnectionStub(HttpClient client,

   168                 InetSocketAddress address,

   169                 InetSocketAddress proxy,

   170                 boolean secured) {

   171             super(address, null);

   172             this.key = ConnectionPool.cacheKey(address, proxy);

   173             this.address = address;

   174             this.proxy = proxy;

   175             this.secured = secured;

   176             this.client = client;

   177             this.flow = new FlowTubeStub(this);

   178         }

   179 

   180         final InetSocketAddress proxy;

   181         final InetSocketAddress address;

   182         final boolean secured;

   183         final ConnectionPool.CacheKey key;

   184         final HttpClient client;

   185         final FlowTubeStub flow;

   186         volatile boolean closed;

   187 

   188         // All these return something

   189         @Override boolean connected() {return !closed;}

   190         @Override boolean isSecure() {return secured;}

   191         @Override boolean isProxied() {return proxy!=null;}

   192         @Override ConnectionPool.CacheKey cacheKey() {return key;}

   193         @Override void shutdownInput() throws IOException {}

   194         @Override void shutdownOutput() throws IOException {}

   195         @Override

   196         public void close() {

   197             closed=true;

   198             System.out.println("closed: " + this);

   199         }

   200         @Override

   201         public String toString() {

   202             return "HttpConnectionStub: " + address + " proxy: " + proxy;

   203         }

   204 

   205         // All these throw errors

   206         @Override public HttpPublisher publisher() {return error();}

   207         @Override public CompletableFuture<Void> connectAsync() {return error();}

   208         @Override SocketChannel channel() {return error();}

   209         @Override

   210         HttpConnection.DetachedConnectionChannel detachChannel() {

   211             return error();

   212         }

   213         @Override

   214         FlowTube getConnectionFlow() {return flow;}

   215     }

   216     // Emulates an HttpClient that has a strong reference to its connection pool.

   217     static class HttpClientStub extends HttpClient {

   218         public HttpClientStub(ConnectionPool pool) {

   219             this.pool = pool;

   220         }

   221         final ConnectionPool pool;

   222         @Override public Optional<CookieHandler> cookieHandler() {return error();}

   223         @Override public HttpClient.Redirect followRedirects() {return error();}

   224         @Override public Optional<ProxySelector> proxy() {return error();}

   225         @Override public SSLContext sslContext() {return error();}

   226         @Override public SSLParameters sslParameters() {return error();}

   227         @Override public Optional<Authenticator> authenticator() {return error();}

   228         @Override public HttpClient.Version version() {return HttpClient.Version.HTTP_1_1;}

   229         @Override public Optional<Executor> executor() {return error();}

   230         @Override

   231         public <T> HttpResponse<T> send(HttpRequest req,

   232                 HttpResponse.BodyHandler<T> responseBodyHandler)

   233                 throws IOException, InterruptedException {

   234             return error();

   235         }

   236         @Override

   237         public <T> CompletableFuture<HttpResponse<T>> sendAsync(HttpRequest req,

   238                 HttpResponse.BodyHandler<T> responseBodyHandler) {

   239             return error();

   240         }

   241         @Override

   242         public <T> CompletableFuture<HttpResponse<T>> sendAsync(HttpRequest req,

   243                 HttpResponse.BodyHandler<T> bodyHandler,

   244                 HttpResponse.PushPromiseHandler<T> multiHandler) {

   245             return error();

   246         }

   247     }

   248 

   249 }