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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.disttest.controller;
import java.util.Timer;
import java.util.TimerTask;
import org.apache.qpid.disttest.DistributedTestException;
import org.apache.qpid.test.utils.QpidTestCase;
public class ClientRegistryTest extends QpidTestCase
{
private static final String CLIENT1_REGISTERED_NAME = "CLIENT1_REGISTERED_NAME";
private static final String CLIENT2_REGISTERED_NAME = "CLIENT2_REGISTERED_NAME";
private static final String CLIENT3_REGISTERED_NAME = "CLIENT3_REGISTERED_NAME";
private static final int AWAIT_DELAY = 100;
private ClientRegistry _clientRegistry = new ClientRegistry();
public void testRegisterClient()
{
assertEquals(0, _clientRegistry.getClients().size());
_clientRegistry.registerClient(CLIENT1_REGISTERED_NAME);
assertEquals(1, _clientRegistry.getClients().size());
}
public void testRejectsDuplicateClientNames()
{
_clientRegistry.registerClient(CLIENT1_REGISTERED_NAME);
try
{
_clientRegistry.registerClient(CLIENT1_REGISTERED_NAME);
fail("Should have thrown an exception");
}
catch (final DistributedTestException e)
{
// pass
}
}
public void testAwaitOneClientWhenClientNotRegistered()
{
int numberOfClientsAbsent = _clientRegistry.awaitClients(1, AWAIT_DELAY);
assertEquals(1, numberOfClientsAbsent);
}
public void testAwaitOneClientWhenClientAlreadyRegistered()
{
_clientRegistry.registerClient(CLIENT1_REGISTERED_NAME);
int numberOfClientsAbsent = _clientRegistry.awaitClients(1, AWAIT_DELAY);
assertEquals(0, numberOfClientsAbsent);
}
public void testAwaitTwoClientsWhenClientRegistersWhilstWaiting()
{
_clientRegistry.registerClient(CLIENT1_REGISTERED_NAME);
registerClientLater(CLIENT2_REGISTERED_NAME, 50);
int numberOfClientsAbsent = _clientRegistry.awaitClients(2, AWAIT_DELAY);
assertEquals(0, numberOfClientsAbsent);
}
public void testAwaitTimeoutForPromptRegistrations()
{
registerClientsLaterAndAssertResult("Clients registering every 100ms should be within 600ms timeout",
new int[] {300, 400, 500},
600,
0);
}
public void testAwaitTimeoutForWhenThirdRegistrationIsLate()
{
registerClientsLaterAndAssertResult("Third client registering tardily should exceed timeout",
new int[] {300, 400, 1500},
600,
1);
}
public void testAwaitTimeoutWhenSecondAndThirdRegistrationsAreLate()
{
registerClientsLaterAndAssertResult("Second and third clients registering tardily should exceed timeout",
new int[] {300, 1500, 1500},
600,
2);
}
private void registerClientsLaterAndAssertResult(String message, int[] registrationDelays, int timeout, int expectedNumberOfAbsentees)
{
registerClientLater(CLIENT1_REGISTERED_NAME, registrationDelays[0]);
registerClientLater(CLIENT2_REGISTERED_NAME, registrationDelays[1]);
registerClientLater(CLIENT3_REGISTERED_NAME, registrationDelays[2]);
int numberOfClientsAbsent = _clientRegistry.awaitClients(3, timeout);
assertEquals(message, expectedNumberOfAbsentees, numberOfClientsAbsent);
}
private void registerClientLater(final String clientName, long delayInMillis)
{
doLater(new TimerTask()
{
@Override
public void run()
{
_clientRegistry.registerClient(clientName);
}
}, delayInMillis);
}
private void doLater(TimerTask task, long delayInMillis)
{
Timer timer = new Timer();
timer.schedule(task, delayInMillis);
}
}
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