/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.test.ha.client.loadbalance;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import junit.framework.TestCase;
import org.jboss.ha.client.loadbalance.FirstAvailable;
import org.jboss.ha.client.loadbalance.LoadBalancePolicy;
import org.jboss.ha.framework.interfaces.ClusteringTargetsRepository;
import org.jboss.ha.framework.interfaces.FamilyClusterInfo;
/**
* Tests of the FirstAvailable load balance policy.
*
* @author Brian Stansberry
*/
public class FirstAvailableUnitTestCase extends TestCase
{
protected static final String[] TARGETS = { "A", "B", "C" };
protected static final String FAMILY_BASE = "testFamily";
protected static int testCount = 0;
/**
* Create a new FirstAvailableUnitTestCase.
*
* @param name
*/
public FirstAvailableUnitTestCase(String name)
{
super(name);
}
protected LoadBalancePolicy getLoadBalancePolicy()
{
return new FirstAvailable();
}
public void testBasicStickiness()
{
testCount++;
List<String> targets = Arrays.asList(TARGETS);
FamilyClusterInfo fci = ClusteringTargetsRepository.initTarget(FAMILY_BASE + testCount, targets);
LoadBalancePolicy lbp = getLoadBalancePolicy();
Object target = lbp.chooseTarget(fci);
assertTrue(targets.contains(target));
for (int i = 0; i < 10; i++)
assertEquals(target, lbp.chooseTarget(fci));
}
public void testInitialSelection()
{
testCount++;
FamilyClusterInfo fci = ClusteringTargetsRepository.initTarget(FAMILY_BASE + testCount, Arrays.asList(TARGETS));
Set<Object> selected = new HashSet<Object>();
for (int i = 0; i < 10000; i++)
{
LoadBalancePolicy lbp = getLoadBalancePolicy();
selected.add(lbp.chooseTarget(fci));
if (selected.size() == TARGETS.length)
break;
}
assertEquals(TARGETS.length, selected.size());
}
public void testStickinessAfterFailover()
{
testCount++;
List<String> targets = Arrays.asList(TARGETS);
FamilyClusterInfo fci = ClusteringTargetsRepository.initTarget(FAMILY_BASE + testCount, targets);
LoadBalancePolicy lbp = getLoadBalancePolicy();
Object firstTarget;
Object target = firstTarget = lbp.chooseTarget(fci);
assertTrue(targets.contains(target));
for (int i = 0; i < 5; i++)
assertEquals(target, lbp.chooseTarget(fci));
fci.removeDeadTarget(target);
Object secondTarget;
target = secondTarget = lbp.chooseTarget(fci);
assertFalse(firstTarget.equals(secondTarget));
assertTrue(targets.contains(target));
for (int i = 0; i < 5; i++)
assertEquals(target, lbp.chooseTarget(fci));
fci.removeDeadTarget(target);
Object thirdTarget;
target = thirdTarget = lbp.chooseTarget(fci);
assertFalse(firstTarget.equals(thirdTarget));
assertFalse(secondTarget.equals(thirdTarget));
assertTrue(targets.contains(target));
for (int i = 0; i < 5; i++)
assertEquals(target, lbp.chooseTarget(fci));
fci.removeDeadTarget(target);
assertNull(lbp.chooseTarget(fci));
}
public void testNoAvailableTargets()
{
testCount++;
FamilyClusterInfo fci = ClusteringTargetsRepository.initTarget(FAMILY_BASE + testCount, new ArrayList<Object>());
assertNull(getLoadBalancePolicy().chooseTarget(fci));
}
}