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* version 2 for more details (a copy is included in the LICENSE file that
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import java.io.IOException;
import java.net.ServerSocket;
import java.net.URI;
import jdk.incubator.http.HttpClient;
import jdk.incubator.http.HttpRequest;
import jdk.incubator.http.HttpResponse;
import jdk.incubator.http.HttpTimeoutException;
import java.time.Duration;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import static java.lang.System.out;
import static jdk.incubator.http.HttpResponse.BodyHandler.discard;
/**
* @test
* @key intermittent
* @summary Ensures that timeouts of multiple requests are handled in correct order
* @run main/othervm TimeoutOrdering
*/
public class TimeoutOrdering {
// The assumption is that 5 secs is sufficiently large enough, without being
// too large, to ensure the correct receive order of HttpTimeoutExceptions.
static int[] TIMEOUTS = {10, 5, 15, 10, 10, 5};
// A queue for placing timed out requests so that their order can be checked.
static LinkedBlockingQueue<HttpRequest> queue = new LinkedBlockingQueue<>();
static volatile boolean error;
public static void main(String[] args) throws Exception {
HttpClient client = HttpClient.newHttpClient();
try (ServerSocket ss = new ServerSocket(0, 20)) {
int port = ss.getLocalPort();
URI uri = new URI("http://127.0.0.1:" + port + "/");
HttpRequest[] requests = new HttpRequest[TIMEOUTS.length];
out.println("--- TESTING Async");
for (int i = 0; i < TIMEOUTS.length; i++) {
requests[i] = HttpRequest.newBuilder(uri)
.timeout(Duration.ofSeconds(TIMEOUTS[i]))
.GET()
.build();
final HttpRequest req = requests[i];
CompletableFuture<HttpResponse<Object>> response = client
.sendAsync(req, discard(null))
.whenComplete((HttpResponse<Object> r, Throwable t) -> {
if (r != null) {
out.println("Unexpected response: " + r);
error = true;
}
if (t != null) {
if (!(t.getCause() instanceof HttpTimeoutException)) {
out.println("Wrong exception type:" + t.toString());
error = true;
} else {
out.println("Caught expected timeout: " + t.getCause());
}
}
queue.add(req);
});
}
System.out.println("All requests submitted. Waiting ...");
checkReturnOrder(requests);
if (error)
throw new RuntimeException("Failed. Check output");
// Repeat blocking in separate threads. Use queue to wait.
out.println("--- TESTING Sync");
// For running blocking response tasks
ExecutorService executor = Executors.newCachedThreadPool();
for (int i = 0; i < TIMEOUTS.length; i++) {
requests[i] = HttpRequest.newBuilder(uri)
.timeout(Duration.ofSeconds(TIMEOUTS[i]))
.GET()
.build();
final HttpRequest req = requests[i];
executor.execute(() -> {
try {
client.send(req, discard(null));
} catch (HttpTimeoutException e) {
out.println("Caught expected timeout: " + e);
queue.offer(req);
} catch (IOException | InterruptedException ee) {
error = true;
}
});
}
System.out.println("All requests submitted. Waiting ...");
checkReturnOrder(requests);
executor.shutdownNow();
if (error)
throw new RuntimeException("Failed. Check output");
} finally {
((ExecutorService) client.executor()).shutdownNow();
}
}
static void checkReturnOrder(HttpRequest[] requests) throws InterruptedException {
// wait for exceptions and check order
for (int j = 0; j < TIMEOUTS.length; j++) {
HttpRequest req = queue.take();
out.println("Got request from queue " + req + ", order: " + getRequest(req, requests));
switch (j) {
case 0:
case 1: // Expect shortest timeouts, 5sec, first.
if (!(req == requests[1] || req == requests[5])) {
String s = "Expected r1 or r5. Got: " + getRequest(req, requests);
throw new RuntimeException(s);
}
break;
case 2:
case 3:
case 4: // Expect medium timeouts, 10sec, next.
if (!(req == requests[0] || req == requests[3] || req == requests[4])) {
String s = "Expected r1, r4 or r5. Got: " + getRequest(req, requests);
throw new RuntimeException(s);
}
break;
case 5: // Expect largest timeout, 15sec, last.
if (req != requests[2]) {
String s= "Expected r3. Got: " + getRequest(req, requests);
throw new RuntimeException(s);
}
break;
default:
throw new AssertionError("Unknown index: " + j);
}
}
out.println("Return order ok");
}
/** Returns the index of the request in the array. */
static String getRequest(HttpRequest req, HttpRequest[] requests) {
for (int i=0; i<requests.length; i++) {
if (req == requests[i]) {
return "r" + i;
}
}
throw new AssertionError("Unknown request: " + req);
}
}