qpid/java/broker-core/src/main/java/org/apache/qpid/server/subscription/MessageGroupManager.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.subscription;

import org.apache.qpid.server.queue.AMQQueue;
import org.apache.qpid.server.queue.QueueEntry;

public interface MessageGroupManager
{
    public interface SubscriptionResetHelper
    {
        public void resetSubPointersForGroups(Subscription subscription, boolean clearAssignments);

        boolean isEntryAheadOfSubscription(QueueEntry entry, Subscription sub);
    }

    Subscription getAssignedSubscription(QueueEntry entry);

    boolean acceptMessage(Subscription sub, QueueEntry entry);

    QueueEntry findEarliestAssignedAvailableEntry(Subscription sub, AMQQueue queue);

    void clearAssignments(Subscription sub);
}