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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.utils.communication.http;
import com.yahoo.vespa.clustercontroller.utils.communication.async.AsyncCallback;
import com.yahoo.vespa.clustercontroller.utils.communication.async.AsyncOperation;
import com.yahoo.vespa.clustercontroller.utils.communication.async.AsyncOperationImpl;
import org.junit.Test;
import java.util.LinkedList;
import static org.junit.Assert.assertEquals;
public class RequestQueueTest {
public static class Request {
public final HttpRequest request;
public final AsyncOperationImpl<HttpResult> result;
public Request(HttpRequest r, AsyncOperationImpl<HttpResult> rr) {
this.request = r;
this.result = rr;
}
}
public class TestClient implements AsyncHttpClient<HttpResult> {
LinkedList<Request> requests = new LinkedList<>();
@Override
public AsyncOperation<HttpResult> execute(HttpRequest r) {
Request p = new Request(r, new AsyncOperationImpl<HttpResult>(r.toString()));
synchronized (requests) {
requests.addLast(p);
}
return p.result;
}
@Override
public void close() {}
};
@Test
public void testNormalUsage() {
TestClient client = new TestClient();
RequestQueue<HttpResult> queue = new RequestQueue<>(client, 4);
final LinkedList<HttpResult> results = new LinkedList<>();
for (int i=0; i<10; ++i) {
queue.schedule(new HttpRequest().setPath("/" + i), new AsyncCallback<HttpResult>() {
@Override
public void done(AsyncOperation<HttpResult> op) {
if (op.isSuccess()) {
results.add(op.getResult());
} else {
results.add(new HttpResult().setHttpCode(500, op.getCause().getMessage()));
}
}
});
}
assertEquals(4, client.requests.size());
for (int i=0; i<3; ++i) {
Request p = client.requests.removeFirst();
p.result.setResult(new HttpResult());
assertEquals(true, results.getLast().isSuccess());
}
assertEquals(4, client.requests.size());
for (int i=0; i<7; ++i) {
Request p = client.requests.removeFirst();
p.result.setFailure(new Exception("Fail"));
assertEquals(false, results.getLast().isSuccess());
}
assertEquals(0, client.requests.size());
assertEquals(true, queue.empty());
assertEquals(10, results.size());
}
public class Waiter implements Runnable {
boolean waiting = false;
boolean completed = false;
RequestQueue<HttpResult> queue;
Waiter(RequestQueue<HttpResult> queue) {
this.queue = queue;
}
public void run() {
try{
waiting = true;
queue.waitUntilEmpty();
} catch (InterruptedException e) { throw new Error(e); }
completed = true;
}
}
@Test
public void testWaitUntilEmpty() throws Exception {
TestClient client = new TestClient();
RequestQueue<HttpResult> queue = new RequestQueue<>(client, 4);
final LinkedList<HttpResult> result = new LinkedList<>();
queue.schedule(new HttpRequest().setPath("/foo"), new AsyncCallback<HttpResult>() {
@Override
public void done(AsyncOperation<HttpResult> op) {
result.add(op.getResult());
}
});
Waiter waiter = new Waiter(queue);
Thread thread = new Thread(waiter);
thread.start();
while (!waiter.waiting) {
Thread.sleep(1);
}
assertEquals(0, result.size());
client.requests.getFirst().result.setResult(new HttpResult());
while (!waiter.completed) {
Thread.sleep(1);
}
assertEquals(1, result.size());
}
}
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