broker-plugins/amqp-0-8-protocol/src/main/java/org/apache/qpid/server/protocol/v0_8/UnacknowledgedMessageMap.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.
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package org.apache.qpid.server.protocol.v0_8;

import java.util.Collection;
import java.util.Map;

import org.apache.qpid.server.message.MessageInstance;
import org.apache.qpid.server.message.MessageInstanceConsumer;


public interface UnacknowledgedMessageMap
{
    interface Visitor
    {
        boolean callback(final long deliveryTag, final MessageConsumerAssociation messageConsumerPair);

        void visitComplete();
    }

    void visit(Visitor visitor);

    void add(long deliveryTag, MessageInstance message, final MessageInstanceConsumer consumer, final boolean usesCredit);

    MessageConsumerAssociation remove(long deliveryTag, final boolean restoreCredit);

    int size();

    MessageInstance get(long deliveryTag);

    Collection<MessageConsumerAssociation> acknowledge(long deliveryTag, boolean multiple);
    void collect(long key, boolean multiple, Map<Long, MessageConsumerAssociation> msgs);
}