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/*
*
* Copyright (c) 2006 The Apache Software Foundation
*
* 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 org.apache.qpid.server.queue;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import junit.framework.JUnit4TestAdapter;
public class SubscriptionManagerTest
{
private final SubscriptionSet mgr = new SubscriptionSet();
@Test
public void basicSubscriptionManagement()
{
assertTrue(mgr.isEmpty());
assertFalse(mgr.hasActiveSubscribers());
TestSubscription s1 = new TestSubscription("S1");
mgr.addSubscriber(s1);
assertFalse(mgr.isEmpty());
assertTrue(mgr.hasActiveSubscribers());
TestSubscription s2 = new TestSubscription("S2");
mgr.addSubscriber(s2);
s2.setSuspended(true);
assertFalse(mgr.isEmpty());
assertTrue(mgr.hasActiveSubscribers());
assertTrue(s2.isSuspended());
assertFalse(s1.isSuspended());
s1.setSuspended(true);
assertFalse(mgr.hasActiveSubscribers());
mgr.removeSubscriber(new TestSubscription("S1"));
assertFalse(mgr.isEmpty());
mgr.removeSubscriber(new TestSubscription("S2"));
assertTrue(mgr.isEmpty());
}
@Test
public void roundRobin()
{
TestSubscription a = new TestSubscription("A");
TestSubscription b = new TestSubscription("B");
TestSubscription c = new TestSubscription("C");
TestSubscription d = new TestSubscription("D");
mgr.addSubscriber(a);
mgr.addSubscriber(b);
mgr.addSubscriber(c);
mgr.addSubscriber(d);
for (int i = 0; i < 3; i++)
{
assertEquals(a, mgr.nextSubscriber(null));
assertEquals(b, mgr.nextSubscriber(null));
assertEquals(c, mgr.nextSubscriber(null));
assertEquals(d, mgr.nextSubscriber(null));
}
c.setSuspended(true);
for (int i = 0; i < 3; i++)
{
assertEquals(a, mgr.nextSubscriber(null));
assertEquals(b, mgr.nextSubscriber(null));
assertEquals(d, mgr.nextSubscriber(null));
}
mgr.removeSubscriber(a);
d.setSuspended(true);
c.setSuspended(false);
Subscription e = new TestSubscription("D");
mgr.addSubscriber(e);
for (int i = 0; i < 3; i++)
{
assertEquals(b, mgr.nextSubscriber(null));
assertEquals(c, mgr.nextSubscriber(null));
assertEquals(e, mgr.nextSubscriber(null));
}
}
public static junit.framework.Test suite()
{
return new JUnit4TestAdapter(SubscriptionManagerTest.class);
}
}
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