broker-core/src/test/java/org/apache/qpid/server/message/AbstractServerMessageTest.java

/*
 *
 * 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.message;

import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

import java.util.UUID;

import org.apache.qpid.server.store.StorableMessageMetaData;
import org.apache.qpid.server.store.StoredMessage;
import org.apache.qpid.server.store.TransactionLogResource;
import org.apache.qpid.test.utils.QpidTestCase;

public class AbstractServerMessageTest extends QpidTestCase
{
    private static class TestMessage<T extends StorableMessageMetaData> extends AbstractServerMessageImpl<TestMessage<T>,T>
    {

        public TestMessage(final StoredMessage<T> handle,
                           final Object connectionReference)
        {
            super(handle, connectionReference);
        }

        @Override
        public String getInitialRoutingAddress()
        {
            return null;
        }

        @Override
        public AMQMessageHeader getMessageHeader()
        {
            return null;
        }

        @Override
        public long getSize()
        {
            return 0;
        }

        @Override
        public long getExpiration()
        {
            return 0;
        }

        @Override
        public long getArrivalTime()
        {
            return 0;
        }
    }

    private TransactionLogResource createQueue(String name)
    {
        TransactionLogResource queue = mock(TransactionLogResource.class);
        when(queue.getId()).thenReturn(UUID.randomUUID());
        when(queue.getName()).thenReturn(name);
        return queue;
    }

    public void testReferences()
    {
        TransactionLogResource q1 = createQueue("1");
        TransactionLogResource q2 = createQueue("2");

        TestMessage<StorableMessageMetaData> msg = new TestMessage<StorableMessageMetaData>(mock(StoredMessage.class),this);
        assertFalse(msg.isReferenced());
        assertFalse(msg.isReferenced(q1));

        MessageReference<TestMessage<StorableMessageMetaData>> nonQueueRef = msg.newReference();
        assertFalse(msg.isReferenced());
        assertFalse(msg.isReferenced(q1));

        MessageReference<TestMessage<StorableMessageMetaData>> q1ref = msg.newReference(q1);
        assertTrue(msg.isReferenced());
        assertTrue(msg.isReferenced(q1));
        assertFalse(msg.isReferenced(q2));

        q1ref.release();
        assertFalse(msg.isReferenced());
        assertFalse(msg.isReferenced(q1));

        q1ref = msg.newReference(q1);
        assertTrue(msg.isReferenced());
        assertTrue(msg.isReferenced(q1));
        assertFalse(msg.isReferenced(q2));

        MessageReference<TestMessage<StorableMessageMetaData>> q2ref = msg.newReference(q2);
        assertTrue(msg.isReferenced());
        assertTrue(msg.isReferenced(q1));
        assertTrue(msg.isReferenced(q2));

        try
        {
            msg.newReference(q1);
            fail("Should not be able to create a second reference to the same queue");
        }
        catch (MessageAlreadyReferencedException e)
        {
            // pass
        }
        q2ref.release();
        assertTrue(msg.isReferenced());
        assertTrue(msg.isReferenced(q1));
        assertFalse(msg.isReferenced(q2));

        q1ref.release();
        assertFalse(msg.isReferenced());
        assertFalse(msg.isReferenced(q1));

        nonQueueRef.release();

        try
        {
            msg.newReference(q1);
            fail("Message should not allow new references as all references had been removed");
        }
        catch(MessageDeletedException e)
        {
            // pass
        }

    }
}