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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.rendering;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.junit.Test;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.util.concurrent.ListenableFuture;
import com.yahoo.concurrent.Receiver;
import com.yahoo.processing.response.Data;
import com.yahoo.processing.response.DataList;
import com.yahoo.processing.response.DefaultIncomingData;
import com.yahoo.search.Query;
import com.yahoo.search.Result;
import com.yahoo.search.result.Hit;
import com.yahoo.search.result.HitGroup;
import com.yahoo.search.result.Relevance;
import com.yahoo.search.searchchain.Execution;
import com.yahoo.text.Utf8;
/**
* Test adding hits to a hit group during rendering.
*
* @author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
*/
public class AsyncGroupPopulationTestCase {
private static class WrappedFuture<F> implements ListenableFuture<F> {
Receiver<Boolean> isListening = new Receiver<>();
private ListenableFuture<F> wrapped;
WrappedFuture(ListenableFuture<F> wrapped) {
this.wrapped = wrapped;
}
public void addListener(Runnable listener, Executor executor) {
wrapped.addListener(listener, executor);
isListening.put(Boolean.TRUE);
}
public boolean cancel(boolean mayInterruptIfRunning) {
return wrapped.cancel(mayInterruptIfRunning);
}
public boolean isCancelled() {
return wrapped.isCancelled();
}
public boolean isDone() {
return wrapped.isDone();
}
public F get() throws InterruptedException, ExecutionException {
return wrapped.get();
}
public F get(long timeout, TimeUnit unit) throws InterruptedException,
ExecutionException, TimeoutException {
return wrapped.get(timeout, unit);
}
}
private static class ObservableIncoming<DATATYPE extends Data> extends DefaultIncomingData<DATATYPE> {
WrappedFuture<DataList<DATATYPE>> waitForIt = null;
private final Object lock = new Object();
@Override
public ListenableFuture<DataList<DATATYPE>> completed() {
synchronized (lock) {
if (waitForIt == null) {
waitForIt = new WrappedFuture<>(super.completed());
}
}
return waitForIt;
}
}
private static class InstrumentedGroup extends HitGroup {
private static final long serialVersionUID = 4585896586414935558L;
InstrumentedGroup(String id) {
super(id, new Relevance(1), new ObservableIncoming<Hit>());
((ObservableIncoming<Hit>) incoming()).assignOwner(this);
}
}
@Test
public final void test() throws InterruptedException, ExecutionException,
JsonParseException, JsonMappingException, IOException {
String rawExpected = "{"
+ " \"root\": {"
+ " \"children\": ["
+ " {"
+ " \"id\": \"yahoo1\","
+ " \"relevance\": 1.0"
+ " },"
+ " {"
+ " \"id\": \"yahoo2\","
+ " \"relevance\": 1.0"
+ " }"
+ " ],"
+ " \"fields\": {"
+ " \"totalCount\": 0"
+ " },"
+ " \"id\": \"yahoo\","
+ " \"relevance\": 1.0"
+ " }"
+ "}";
ByteArrayOutputStream out = new ByteArrayOutputStream();
HitGroup h = new InstrumentedGroup("yahoo");
h.incoming().add(new Hit("yahoo1"));
JsonRenderer renderer = new JsonRenderer();
Result result = new Result(new Query(), h);
renderer.init();
ListenableFuture<Boolean> f = renderer.render(out, result,
new Execution(Execution.Context.createContextStub()),
result.getQuery());
WrappedFuture<DataList<Hit>> x = (WrappedFuture<DataList<Hit>>) h.incoming().completed();
x.isListening.get(86_400_000);
h.incoming().add(new Hit("yahoo2"));
h.incoming().markComplete();
Boolean b = f.get();
assertTrue(b);
String rawGot = Utf8.toString(out.toByteArray());
ObjectMapper m = new ObjectMapper();
Map<?, ?> expected = m.readValue(rawExpected, Map.class);
Map<?, ?> got = m.readValue(rawGot, Map.class);
assertEquals(expected, got);
}
}
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