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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.documentapi.messagebus.protocol;
import com.yahoo.jrt.slobrok.api.IMirror;
import com.yahoo.jrt.slobrok.api.Mirror;
import com.yahoo.messagebus.routing.RoutingContext;
import org.junit.Test;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.anyString;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
/**
* @author vekterli
*/
public class TargetCachingSlobrokHostFetcherTest {
private static String idOfIndex(int index) {
return String.format("storage/cluster.foo/distributor/%d/default", index);
}
private static String idOfWildcardLookup() {
return "storage/cluster.foo/distributor/*/default";
}
private static String lookupSpecOfIndex(int index) {
return String.format("tcp/localhost:%d", index);
}
private static String resolvedSpecOfIndex(int index) {
return String.format("tcp/localhost:%d/default", index);
}
private static List<Mirror.Entry> dummyEntries(int... indices) {
return Arrays.stream(indices)
.mapToObj(index -> new Mirror.Entry(idOfIndex(index), lookupSpecOfIndex(index))).toList();
}
static class Fixture {
SlobrokPolicy mockSlobrokPolicy = mock(SlobrokPolicy.class);
IMirror mockMirror = mock(IMirror.class);
ContentPolicy.SlobrokHostPatternGenerator patternGenerator = new ContentPolicy.SlobrokHostPatternGenerator("foo");
ContentPolicy.TargetCachingSlobrokHostFetcher hostFetcher = new ContentPolicy.TargetCachingSlobrokHostFetcher(patternGenerator, mockSlobrokPolicy, 60);
RoutingContext routingContext = mock(RoutingContext.class);
Fixture() {
when(mockMirror.updates()).thenReturn(1);
when(routingContext.getMirror()).thenReturn(mockMirror);
when(mockSlobrokPolicy.lookup(any(), eq(idOfIndex(1)))).thenReturn(dummyEntries(1));
when(mockSlobrokPolicy.lookup(any(), eq(idOfIndex(2)))).thenReturn(dummyEntries(2));
when(mockSlobrokPolicy.lookup(any(), eq(idOfWildcardLookup()))).thenReturn(dummyEntries(1, 2, 3, 4));
}
}
@Test
public void lookup_passed_through_on_first_fetch() {
Fixture fixture = new Fixture();
String spec = fixture.hostFetcher.getTargetSpec(1, fixture.routingContext);
assertEquals(resolvedSpecOfIndex(1), spec);
verify(fixture.mockSlobrokPolicy, times(1)).lookup(any(), eq(idOfIndex(1)));
}
@Test
public void cached_index_does_not_do_slobrok_lookup() {
Fixture fixture = new Fixture();
String spec1 = fixture.hostFetcher.getTargetSpec(1, fixture.routingContext);
String spec2 = fixture.hostFetcher.getTargetSpec(1, fixture.routingContext);
assertEquals(spec1, spec2);
// Only invoked once
verify(fixture.mockSlobrokPolicy, times(1)).lookup(any(), anyString());
}
@Test
public void multiple_indexes_are_cached() {
Fixture fixture = new Fixture();
String spec1_1 = fixture.hostFetcher.getTargetSpec(1, fixture.routingContext);
String spec2_1 = fixture.hostFetcher.getTargetSpec(2, fixture.routingContext);
assertEquals(resolvedSpecOfIndex(1), spec1_1);
assertEquals(resolvedSpecOfIndex(2), spec2_1);
String spec1_2 = fixture.hostFetcher.getTargetSpec(1, fixture.routingContext);
String spec2_2 = fixture.hostFetcher.getTargetSpec(2, fixture.routingContext);
assertEquals(spec1_1, spec1_2);
assertEquals(spec2_1, spec2_2);
verify(fixture.mockSlobrokPolicy, times(1)).lookup(any(), eq(idOfIndex(1)));
verify(fixture.mockSlobrokPolicy, times(1)).lookup(any(), eq(idOfIndex(2)));
}
@Test
public void generation_change_evicts_cache() {
Fixture fixture = new Fixture();
when(fixture.mockMirror.updates()).thenReturn(1).thenReturn(2);
when(fixture.mockSlobrokPolicy.lookup(any(), eq(idOfIndex(1))))
.thenReturn(dummyEntries(1)).thenReturn(dummyEntries(2));
String spec1 = fixture.hostFetcher.getTargetSpec(1, fixture.routingContext);
String spec2 = fixture.hostFetcher.getTargetSpec(1, fixture.routingContext);
assertEquals(resolvedSpecOfIndex(1), spec1);
assertEquals(resolvedSpecOfIndex(2), spec2);
}
@Test
public void wildcard_null_distributor_index_is_not_cached() {
Fixture fixture = new Fixture();
String spec = fixture.hostFetcher.getTargetSpec(null, fixture.routingContext);
assertNotNull(spec);
spec = fixture.hostFetcher.getTargetSpec(null, fixture.routingContext);
assertNotNull(spec);
verify(fixture.mockSlobrokPolicy, times(2)).lookup(any(), eq(idOfWildcardLookup()));
}
}
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