| /* |
| * |
| * 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.protocol.v0_8; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| import org.apache.qpid.server.message.MessageInstance; |
| import org.apache.qpid.server.message.MessageInstanceConsumer; |
| import org.apache.qpid.server.protocol.ErrorCodes; |
| import org.apache.qpid.server.util.ConnectionScopedRuntimeException; |
| |
| class UnacknowledgedMessageMapImpl implements UnacknowledgedMessageMap |
| { |
| private static final class MessageConsumerAssociationImpl implements MessageConsumerAssociation |
| { |
| private final MessageInstance _messageInstance; |
| private final MessageInstanceConsumer _consumer; |
| private final boolean _usesCredit; |
| |
| private MessageConsumerAssociationImpl(final MessageInstance messageInstance, final MessageInstanceConsumer consumer, final boolean usesCredit) |
| { |
| _messageInstance = messageInstance; |
| _consumer = consumer; |
| _usesCredit = usesCredit; |
| } |
| |
| @Override |
| public MessageInstance getMessageInstance() |
| { |
| return _messageInstance; |
| } |
| |
| @Override |
| public MessageInstanceConsumer getConsumer() |
| { |
| return _consumer; |
| } |
| |
| @Override |
| public long getSize() |
| { |
| return _messageInstance.getMessage().getSize(); |
| } |
| |
| public boolean isUsesCredit() |
| { |
| return _usesCredit; |
| } |
| } |
| private final Map<Long, MessageConsumerAssociationImpl> _map; |
| // we keep this separately as it is accessed by the management thread |
| private volatile int _size; |
| |
| private final CreditRestorer _creditRestorer; |
| |
| UnacknowledgedMessageMapImpl(int prefetchLimit, CreditRestorer creditRestorer) |
| { |
| _map = new LinkedHashMap<>(prefetchLimit); |
| _creditRestorer = creditRestorer; |
| } |
| |
| @Override |
| public void collect(long deliveryTag, boolean multiple, Map<Long, MessageConsumerAssociation> msgs) |
| { |
| if (multiple) |
| { |
| collect(deliveryTag, msgs); |
| } |
| else |
| { |
| final MessageConsumerAssociation messageConsumerAssociation = _map.get(deliveryTag); |
| if(messageConsumerAssociation != null) |
| { |
| msgs.put(deliveryTag, messageConsumerAssociation); |
| } |
| } |
| |
| } |
| |
| private void remove(Collection<Long> msgs) |
| { |
| for (Long deliveryTag : msgs) |
| { |
| remove(deliveryTag, true); |
| } |
| } |
| |
| @Override |
| public MessageConsumerAssociation remove(long deliveryTag, final boolean restoreCredit) |
| { |
| MessageConsumerAssociationImpl entry = _map.remove(deliveryTag); |
| if(entry != null) |
| { |
| _size--; |
| if(restoreCredit && entry.isUsesCredit()) |
| { |
| _creditRestorer.restoreCredit(entry.getConsumer().getTarget(), 1, entry.getSize()); |
| } |
| } |
| return entry; |
| } |
| |
| @Override |
| public void visit(Visitor visitor) |
| { |
| for (Map.Entry<Long, MessageConsumerAssociationImpl> entry : _map.entrySet()) |
| { |
| visitor.callback(entry.getKey(), entry.getValue()); |
| } |
| visitor.visitComplete(); |
| } |
| |
| @Override |
| public void add(long deliveryTag, MessageInstance message, final MessageInstanceConsumer consumer, final boolean usesCredit) |
| { |
| if(_map.put(deliveryTag, new MessageConsumerAssociationImpl(message, consumer, usesCredit)) == null) |
| { |
| _size++; |
| } |
| else |
| { |
| throw new ConnectionScopedRuntimeException("Unexpected duplicate delivery tag created"); |
| } |
| } |
| |
| @Override |
| public int size() |
| { |
| return _size; |
| } |
| |
| @Override |
| public MessageInstance get(long key) |
| { |
| MessageConsumerAssociation association = _map.get(key); |
| return association == null ? null : association.getMessageInstance(); |
| } |
| |
| @Override |
| public Collection<MessageConsumerAssociation> acknowledge(long deliveryTag, boolean multiple) |
| { |
| if(multiple) |
| { |
| Map<Long, MessageConsumerAssociation> ackedMessageMap = new LinkedHashMap<>(); |
| collect(deliveryTag, multiple, ackedMessageMap); |
| remove(ackedMessageMap.keySet()); |
| List<MessageConsumerAssociation> acknowledged = new ArrayList<>(); |
| for (MessageConsumerAssociation messageConsumerAssociation : ackedMessageMap.values()) |
| { |
| MessageInstance instance = messageConsumerAssociation.getMessageInstance(); |
| if (instance.makeAcquisitionUnstealable(messageConsumerAssociation.getConsumer())) |
| { |
| acknowledged.add(messageConsumerAssociation); |
| } |
| } |
| return acknowledged; |
| } |
| else |
| { |
| final MessageConsumerAssociation association = remove(deliveryTag, true); |
| if (association != null) |
| { |
| final MessageInstance messageInstance = association.getMessageInstance(); |
| if (messageInstance != null && messageInstance.makeAcquisitionUnstealable(association.getConsumer())) |
| { |
| return Collections.singleton(association); |
| } |
| } |
| return Collections.emptySet(); |
| } |
| } |
| |
| private void collect(long key, Map<Long, MessageConsumerAssociation> msgs) |
| { |
| for (Map.Entry<Long, MessageConsumerAssociationImpl> entry : _map.entrySet()) |
| { |
| msgs.put(entry.getKey(), entry.getValue()); |
| if (entry.getKey() == key) |
| { |
| break; |
| } |
| } |
| } |
| |
| } |