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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.server.queue;
import java.lang.reflect.Field;
import junit.framework.TestCase;
import org.apache.qpid.AMQException;
import org.apache.qpid.server.message.AMQMessage;
import org.apache.qpid.server.queue.QueueEntry.EntryState;
import org.apache.qpid.server.subscription.MockSubscription;
/**
* Tests for {@link QueueEntryImpl}
*
*/
public class QueueEntryImplTest extends TestCase
{
// tested entry
private QueueEntryImpl _queueEntry;
public void setUp() throws Exception
{
AMQMessage message = new MockAMQMessage(1);
SimpleQueueEntryList queueEntryList = new SimpleQueueEntryList(new MockAMQQueue("test"));
_queueEntry = new QueueEntryImpl(queueEntryList, message, 1);
}
public void testAquire()
{
assertTrue("Queue entry should be in AVAILABLE state before invoking of acquire method",
_queueEntry.isAvailable());
acquire();
}
public void testDequeue()
{
dequeue();
}
public void testDelete()
{
delete();
}
/**
* Tests release method for entry in acquired state.
* <p>
* Entry in state ACQUIRED should be released and its status should be
* changed to AVAILABLE.
*/
public void testReleaseAquired()
{
acquire();
_queueEntry.release();
assertTrue("Queue entry should be in AVAILABLE state after invoking of release method",
_queueEntry.isAvailable());
}
/**
* Tests release method for entry in dequeued state.
* <p>
* Invoking release on dequeued entry should not have any effect on its
* state.
*/
public void testReleaseDequeued()
{
dequeue();
_queueEntry.release();
EntryState state = getState();
assertEquals("Invoking of release on entry in DEQUEUED state should not have any effect",
QueueEntry.DEQUEUED_STATE, state);
}
/**
* Tests release method for entry in deleted state.
* <p>
* Invoking release on deleted entry should not have any effect on its
* state.
*/
public void testReleaseDeleted()
{
delete();
_queueEntry.release();
assertTrue("Invoking of release on entry in DELETED state should not have any effect",
_queueEntry.isDeleted());
}
/**
* Tests if entries in DEQUQUED or DELETED state are not returned by getNext method.
*/
public void testGetNext()
{
int numberOfEntries = 5;
QueueEntryImpl[] entries = new QueueEntryImpl[numberOfEntries];
SimpleQueueEntryList queueEntryList = new SimpleQueueEntryList(new MockAMQQueue("test"));
// create test entries
for(int i = 0; i < numberOfEntries ; i++)
{
AMQMessage message = null;;
try
{
message = new MockAMQMessage(i);
}
catch (AMQException e)
{
fail("Failure to create a mock message:" + e.getMessage());
}
QueueEntryImpl entry = (QueueEntryImpl)queueEntryList.add(message);
entries[i] = entry;
}
// test getNext for not acquired entries
for(int i = 0; i < numberOfEntries ; i++)
{
QueueEntryImpl queueEntry = entries[i];
QueueEntryImpl next = queueEntry.getNext();
if (i < numberOfEntries - 1)
{
assertEquals("Unexpected entry from QueueEntryImpl#getNext()", entries[i + 1], next);
}
else
{
assertNull("The next entry after the last should be null", next);
}
}
// delete second
entries[1].acquire();
entries[1].delete();
// dequeue third
entries[2].acquire();
entries[2].dequeue();
QueueEntryImpl next = entries[0].getNext();
assertEquals("expected forth entry",entries[3], next);
next = next.getNext();
assertEquals("expected fifth entry", entries[4], next);
next = next.getNext();
assertNull("The next entry after the last should be null", next);
}
/**
* A helper method to put tested object into deleted state and assert the state
*/
private void delete()
{
_queueEntry.delete();
assertTrue("Queue entry should be in DELETED state after invoking of delete method",
_queueEntry.isDeleted());
}
/**
* A helper method to put tested entry into dequeue state and assert the sate
*/
private void dequeue()
{
acquire();
_queueEntry.dequeue();
EntryState state = getState();
assertEquals("Queue entry should be in DEQUEUED state after invoking of dequeue method",
QueueEntry.DEQUEUED_STATE, state);
}
/**
* A helper method to put tested entry into acquired state and assert the sate
*/
private void acquire()
{
_queueEntry.acquire(new MockSubscription());
assertTrue("Queue entry should be in ACQUIRED state after invoking of acquire method",
_queueEntry.isAcquired());
}
/**
* A helper method to get entry state
*
* @return entry state
*/
private EntryState getState()
{
EntryState state = null;
try
{
Field f = QueueEntryImpl.class.getDeclaredField("_state");
f.setAccessible(true);
state = (EntryState) f.get(_queueEntry);
}
catch (Exception e)
{
fail("Failure to get a state field: " + e.getMessage());
}
return state;
}
}
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