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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.prelude.cluster.test;
import com.yahoo.container.handler.VipStatus;
import com.yahoo.fs4.QueryPacket;
import com.yahoo.prelude.cluster.Hasher;
import com.yahoo.prelude.fastsearch.CacheKey;
import com.yahoo.prelude.fastsearch.VespaBackEndSearcher;
import com.yahoo.search.Query;
import com.yahoo.search.Result;
import com.yahoo.search.searchchain.Execution;
/**
* Tests the Hashing/failover/whatever functionality.
*
* @author bratseth
* @author Steinar Knutsen
*/
public class HasherTestCase extends junit.framework.TestCase {
public HasherTestCase (String name) {
super(name);
}
public void testEmptyHasher() {
Hasher hasher=new Hasher();
assertNull(hasher.select(0));
}
private static class MockBackend extends VespaBackEndSearcher {
@Override
protected Result doSearch2(Query query, QueryPacket queryPacket,
CacheKey cacheKey, Execution execution) {
return null;
}
@Override
protected void doPartialFill(Result result, String summaryClass) {
}
}
public void testOneHasher() {
Hasher hasher = new Hasher();
VespaBackEndSearcher o1 = new MockBackend();
hasher.add(o1);
assertSame(o1, hasher.select(0));
assertSame(o1, hasher.select(1));
hasher.remove(o1);
assertNull(hasher.select(0));
}
public void testAddAndRemove() {
Hasher hasher = new Hasher();
VespaBackEndSearcher v0 = new MockBackend();
VespaBackEndSearcher v1 = new MockBackend();
VespaBackEndSearcher v2 = new MockBackend();
VespaBackEndSearcher v3 = new MockBackend();
v1.setLocalDispatching(false);
v3.setLocalDispatching(false);
hasher.add(v1);
hasher.add(v0);
assertSame(v0, hasher.select(0));
hasher.add(v2);
VespaBackEndSearcher tmp1 = hasher.select(0);
assertTrue(v0 == tmp1 || v2 == tmp1);
if (tmp1 == v0) {
assertSame(v2, hasher.select(0));
assertSame(v0, hasher.select(0));
} else {
assertSame(v0, hasher.select(0));
assertSame(v2, hasher.select(0));
}
hasher.remove(v2);
hasher.remove(v2);
assertEquals(2, hasher.getNodeCount());
assertSame(v0, hasher.select(0));
hasher.remove(v0);
assertEquals(1, hasher.getNodeCount());
assertSame(v1, hasher.select(0));
hasher.add(v3);
hasher.add(v0);
assertSame(v0, hasher.select(0));
}
public void testPreferLocal() {
Hasher hasher = new Hasher();
VespaBackEndSearcher v0 = new MockBackend();
VespaBackEndSearcher v1 = new MockBackend();
VespaBackEndSearcher v2 = new MockBackend();
v1.setLocalDispatching(false);
v2.setLocalDispatching(false);
hasher.add(v1);
hasher.add(v2);
hasher.add(v0);
assertTrue(hasher.select(0).isLocalDispatching());
hasher = new Hasher();
hasher.add(v1);
hasher.add(v0);
hasher.add(v2);
assertTrue(hasher.select(0).isLocalDispatching());
hasher = new Hasher();
hasher.add(v0);
hasher.add(v1);
hasher.add(v2);
assertTrue(hasher.select(0).isLocalDispatching());
hasher = new Hasher();
hasher.add(v0);
hasher.add(v1);
hasher.add(v2);
hasher.remove(v1);
assertTrue(hasher.select(0).isLocalDispatching());
hasher = new Hasher();
hasher.add(v0);
hasher.add(v1);
assertTrue(hasher.select(0).isLocalDispatching());
hasher.add(v2);
assertTrue(hasher.select(0).isLocalDispatching());
}
}
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