/*
* Copyright (c) 2008-2017, Hazelcast, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.internal.networking.nio.iobalancer;
import com.hazelcast.internal.networking.nio.MigratableHandler;
import com.hazelcast.internal.networking.nio.NioThread;
import com.hazelcast.logging.ILogger;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.annotation.ParallelTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Before;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;
@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelTest.class})
public class LoadTrackerTest {
private NioThread selector1;
private NioThread selector2;
private NioThread[] selectors;
private LoadTracker loadTracker;
@Before
public void setUp() {
selector1 = mock(NioThread.class);
selector2 = mock(NioThread.class);
selectors = new NioThread[]{selector1, selector2};
ILogger logger = mock(ILogger.class);
when(logger.isFinestEnabled()).thenReturn(true);
loadTracker = new LoadTracker(selectors, logger);
}
@Test
public void testUpdateImbalance() throws Exception {
MigratableHandler selector1Handler1 = mock(MigratableHandler.class);
when(selector1Handler1.getLoad()).thenReturn(0L)
.thenReturn(100L);
when(selector1Handler1.getOwner())
.thenReturn(selector1);
loadTracker.addHandler(selector1Handler1);
MigratableHandler selector2Handler1 = mock(MigratableHandler.class);
when(selector2Handler1.getLoad())
.thenReturn(0L)
.thenReturn(200L);
when(selector2Handler1.getOwner())
.thenReturn(selector2);
loadTracker.addHandler(selector2Handler1);
MigratableHandler selector2Handler3 = mock(MigratableHandler.class);
when(selector2Handler3.getLoad())
.thenReturn(0L)
.thenReturn(100L);
when(selector2Handler3.getOwner())
.thenReturn(selector2);
loadTracker.addHandler(selector2Handler3);
LoadImbalance loadImbalance = loadTracker.updateImbalance();
assertEquals(0, loadImbalance.minimumEvents);
assertEquals(0, loadImbalance.maximumEvents);
loadTracker.updateImbalance();
assertEquals(100, loadImbalance.minimumEvents);
assertEquals(300, loadImbalance.maximumEvents);
assertEquals(selector1, loadImbalance.destinationSelector);
assertEquals(selector2, loadImbalance.sourceSelector);
}
// there is no point in selecting a selector with a single handler as source.
@Test
public void testUpdateImbalance_notUsingSingleHandlerSelectorAsSource() throws Exception {
MigratableHandler selector1Handler1 = mock(MigratableHandler.class);
// the first selector has a handler with a large number of events
when(selector1Handler1.getLoad()).thenReturn(10000L);
when(selector1Handler1.getOwner()).thenReturn(selector1);
loadTracker.addHandler(selector1Handler1);
MigratableHandler selector2Handler = mock(MigratableHandler.class);
when(selector2Handler.getLoad()).thenReturn(200L);
when(selector2Handler.getOwner()).thenReturn(selector2);
loadTracker.addHandler(selector2Handler);
MigratableHandler selector2Handler2 = mock(MigratableHandler.class);
when(selector2Handler2.getLoad()).thenReturn(200L);
when(selector2Handler2.getOwner()).thenReturn(selector2);
loadTracker.addHandler(selector2Handler2);
LoadImbalance loadImbalance = loadTracker.updateImbalance();
assertEquals(400, loadImbalance.minimumEvents);
assertEquals(400, loadImbalance.maximumEvents);
assertEquals(selector2, loadImbalance.destinationSelector);
assertEquals(selector2, loadImbalance.sourceSelector);
}
}