| /* |
| * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 8087112 |
| * @library /lib/testlibrary/ |
| * @build jdk.testlibrary.SimpleSSLContext |
| * @compile ../../../com/sun/net/httpserver/LogFilter.java |
| * @compile ../../../com/sun/net/httpserver/FileServerHandler.java |
| * @run main/othervm ManyRequests |
| * @summary Send a large number of requests asynchronously |
| */ |
| |
| //package javaapplication16; |
| |
| import com.sun.net.httpserver.HttpsConfigurator; |
| import com.sun.net.httpserver.HttpsServer; |
| import java.io.IOException; |
| import java.io.UncheckedIOException; |
| import java.net.http.HttpClient; |
| import java.net.http.HttpRequest; |
| import java.net.http.HttpResponse; |
| import java.net.InetSocketAddress; |
| import java.net.URI; |
| import java.util.Arrays; |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.Random; |
| import java.util.concurrent.CompletableFuture; |
| import javax.net.ssl.SSLContext; |
| import jdk.testlibrary.SimpleSSLContext; |
| |
| public class ManyRequests { |
| |
| public static void main(String[] args) throws Exception { |
| SSLContext ctx = new SimpleSSLContext().get(); |
| |
| InetSocketAddress addr = new InetSocketAddress(0); |
| HttpsServer server = HttpsServer.create(addr, 0); |
| server.setHttpsConfigurator(new HttpsConfigurator(ctx)); |
| |
| HttpClient client = HttpClient.create() |
| .sslContext(ctx) |
| .build(); |
| try { |
| test(server, client); |
| System.out.println("OK"); |
| } finally { |
| server.stop(0); |
| client.executorService().shutdownNow(); |
| } |
| } |
| |
| static final int REQUESTS = 1000; |
| |
| static void test(HttpsServer server, HttpClient client) throws Exception { |
| int port = server.getAddress().getPort(); |
| URI uri = new URI("https://127.0.0.1:" + port + "/foo/x"); |
| server.createContext("/foo", new EchoHandler()); |
| server.start(); |
| |
| RequestLimiter limiter = new RequestLimiter(40); |
| Random rand = new Random(); |
| CompletableFuture<Void>[] results = new CompletableFuture[REQUESTS]; |
| HashMap<HttpRequest,byte[]> bodies = new HashMap<>(); |
| |
| for (int i=0; i<REQUESTS; i++) { |
| byte[] buf = new byte[i+1]; // different size bodies |
| rand.nextBytes(buf); |
| HttpRequest r = client.request(uri) |
| .body(HttpRequest.fromByteArray(buf)) |
| .POST(); |
| bodies.put(r, buf); |
| |
| results[i] = |
| limiter.whenOkToSend() |
| .thenCompose((v) -> r.responseAsync()) |
| .thenCompose((resp) -> { |
| limiter.requestComplete(); |
| if (resp.statusCode() != 200) { |
| resp.bodyAsync(HttpResponse.ignoreBody()); |
| String s = "Expected 200, got: " + resp.statusCode(); |
| return completedWithIOException(s); |
| } |
| return resp.bodyAsync(HttpResponse.asByteArray()) |
| .thenApply((b) -> new Pair<>(resp, b)); |
| }) |
| .thenAccept((pair) -> { |
| HttpRequest request = pair.t.request(); |
| byte[] requestBody = bodies.get(request); |
| check(Arrays.equals(requestBody, pair.u), |
| "bodies not equal"); |
| |
| }); |
| } |
| // wait for them all to complete and throw exception in case of error |
| CompletableFuture.allOf(results).join(); |
| } |
| |
| static <T> CompletableFuture<T> completedWithIOException(String message) { |
| CompletableFuture<T> cf = new CompletableFuture<>(); |
| cf.completeExceptionally(new IOException(message)); |
| return cf; |
| } |
| |
| static final class Pair<T,U> { |
| Pair(T t, U u) { |
| this.t = t; this.u = u; |
| } |
| T t; |
| U u; |
| } |
| |
| /** |
| * A simple limiter for controlling the number of requests to be run in |
| * parallel whenOkToSend() is called which returns a CF<Void> that allows |
| * each individual request to proceed, or block temporarily (blocking occurs |
| * on the waiters list here. As each request actually completes |
| * requestComplete() is called to notify this object, and allow some |
| * requests to continue. |
| */ |
| static class RequestLimiter { |
| |
| static final CompletableFuture<Void> COMPLETED_FUTURE = |
| CompletableFuture.completedFuture(null); |
| |
| final int maxnumber; |
| final LinkedList<CompletableFuture<Void>> waiters; |
| int number; |
| boolean blocked; |
| |
| RequestLimiter(int maximum) { |
| waiters = new LinkedList<>(); |
| maxnumber = maximum; |
| } |
| |
| synchronized void requestComplete() { |
| number--; |
| // don't unblock until number of requests has halved. |
| if ((blocked && number <= maxnumber / 2) || |
| (!blocked && waiters.size() > 0)) { |
| int toRelease = Math.min(maxnumber - number, waiters.size()); |
| for (int i=0; i<toRelease; i++) { |
| CompletableFuture<Void> f = waiters.remove(); |
| number ++; |
| f.complete(null); |
| } |
| blocked = number >= maxnumber; |
| } |
| } |
| |
| synchronized CompletableFuture<Void> whenOkToSend() { |
| if (blocked || number + 1 >= maxnumber) { |
| blocked = true; |
| CompletableFuture<Void> r = new CompletableFuture<>(); |
| waiters.add(r); |
| return r; |
| } else { |
| number++; |
| return COMPLETED_FUTURE; |
| } |
| } |
| } |
| |
| static void check(boolean cond, Object... msg) { |
| if (cond) |
| return; |
| StringBuilder sb = new StringBuilder(); |
| for (Object o : msg) |
| sb.append(o); |
| throw new RuntimeException(sb.toString()); |
| } |
| } |