diff options
Diffstat (limited to 'qpid/java/common/src/main/java/org/apache/qpid/util/ConcurrentLinkedMessageQueueAtomicSize.java')
| -rw-r--r-- | qpid/java/common/src/main/java/org/apache/qpid/util/ConcurrentLinkedMessageQueueAtomicSize.java | 258 |
1 files changed, 0 insertions, 258 deletions
diff --git a/qpid/java/common/src/main/java/org/apache/qpid/util/ConcurrentLinkedMessageQueueAtomicSize.java b/qpid/java/common/src/main/java/org/apache/qpid/util/ConcurrentLinkedMessageQueueAtomicSize.java deleted file mode 100644 index 633cf4fe3a..0000000000 --- a/qpid/java/common/src/main/java/org/apache/qpid/util/ConcurrentLinkedMessageQueueAtomicSize.java +++ /dev/null @@ -1,258 +0,0 @@ -/* - * 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.util; - -import org.slf4j.Logger; -import org.slf4j.LoggerFactory; - -import java.util.Collection; -import java.util.Iterator; -import java.util.Queue; -import java.util.concurrent.atomic.AtomicInteger; - -public class ConcurrentLinkedMessageQueueAtomicSize<E> extends ConcurrentLinkedQueueAtomicSize<E> implements MessageQueue<E> -{ - private static final Logger _logger = LoggerFactory.getLogger(ConcurrentLinkedMessageQueueAtomicSize.class); - - protected Queue<E> _messageHead = new ConcurrentLinkedQueueAtomicSize<E>(); - - protected AtomicInteger _messageHeadSize = new AtomicInteger(0); - - @Override - public int size() - { - return super.size() + _messageHeadSize.get(); - } - - public int headSize() - { - return _messageHeadSize.get(); - } - - @Override - public E poll() - { - if (_messageHead.isEmpty()) - { - return super.poll(); - } - else - { - E e = _messageHead.poll(); - - if (_logger.isDebugEnabled()) - { - _logger.debug("Providing item(" + e + ")from message head"); - } - - if (e != null) - { - _messageHeadSize.decrementAndGet(); - } - - return e; - } - } - - @Override - public boolean remove(Object o) - { - - if (_messageHead.isEmpty()) - { - return super.remove(o); - } - else - { - if (_messageHead.remove(o)) - { - _messageHeadSize.decrementAndGet(); - - return true; - } - - return super.remove(o); - } - } - - @Override - public boolean removeAll(Collection<?> c) - { - if (_messageHead.isEmpty()) - { - return super.removeAll(c); - } - else - { - // fixme this is super.removeAll but iterator here doesn't work - // we need to be able to correctly decrement _messageHeadSize - // boolean modified = false; - // Iterator<?> e = iterator(); - // while (e.hasNext()) - // { - // if (c.contains(e.next())) - // { - // e.remove(); - // modified = true; - // _size.decrementAndGet(); - // } - // } - // return modified; - - throw new RuntimeException("Not implemented"); - } - } - - @Override - public boolean isEmpty() - { - return (_messageHead.isEmpty() && super.isEmpty()); - } - - @Override - public void clear() - { - super.clear(); - _messageHead.clear(); - } - - @Override - public boolean contains(Object o) - { - return _messageHead.contains(o) || super.contains(o); - } - - @Override - public boolean containsAll(Collection<?> o) - { - return _messageHead.containsAll(o) || super.containsAll(o); - } - - @Override - public E element() - { - if (_messageHead.isEmpty()) - { - return super.element(); - } - else - { - return _messageHead.element(); - } - } - - @Override - public E peek() - { - if (_messageHead.isEmpty()) - { - return super.peek(); - } - else - { - E o = _messageHead.peek(); - if (_logger.isDebugEnabled()) - { - _logger.debug("Peeking item (" + o + ") from message head"); - } - - return o; - } - - } - - @Override - public Iterator<E> iterator() - { - final Iterator<E> mainMessageIterator = super.iterator(); - - return new Iterator<E>() - { - final Iterator<E> _headIterator = _messageHead.iterator(); - final Iterator<E> _mainIterator = mainMessageIterator; - - Iterator<E> last; - - public boolean hasNext() - { - return _headIterator.hasNext() || _mainIterator.hasNext(); - } - - public E next() - { - if (_headIterator.hasNext()) - { - last = _headIterator; - - return _headIterator.next(); - } - else - { - last = _mainIterator; - - return _mainIterator.next(); - } - } - - public void remove() - { - last.remove(); - if(last == _mainIterator) - { - _size.decrementAndGet(); - } - else - { - _messageHeadSize.decrementAndGet(); - } - } - }; - } - - @Override - public boolean retainAll(Collection<?> c) - { - throw new RuntimeException("Not Implemented"); - } - - @Override - public Object[] toArray() - { - throw new RuntimeException("Not Implemented"); - } - - public boolean pushHead(E o) - { - if (_logger.isDebugEnabled()) - { - _logger.debug("Adding item(" + o + ") to head of queue"); - } - - if (_messageHead.offer(o)) - { - _messageHeadSize.incrementAndGet(); - - return true; - } - - return false; - } -} |