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/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.queue.impl.proxy;
import com.hazelcast.core.IQueue;
import com.hazelcast.monitor.LocalQueueStats;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.queue.impl.QueueService;
import com.hazelcast.spi.InitializingObject;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.util.ValidationUtil;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.concurrent.TimeUnit;
/**
* Proxy implementation for the Queue.
*
* @param
*/
public class QueueProxyImpl extends QueueProxySupport implements IQueue, InitializingObject {
public QueueProxyImpl(String name, QueueService queueService, NodeEngine nodeEngine) {
super(name, queueService, nodeEngine);
}
@Override
public LocalQueueStats getLocalQueueStats() {
return getService().createLocalQueueStats(name, partitionId);
}
@Override
public boolean add(E e) {
if (offer(e)) {
return true;
}
throw new IllegalStateException("Queue is full!");
}
@Override
public boolean offer(E e) {
try {
return offer(e, 0, TimeUnit.SECONDS);
} catch (InterruptedException ex) {
return false;
}
}
@Override
public void put(E e) throws InterruptedException {
offer(e, -1, TimeUnit.MILLISECONDS);
}
@Override
public boolean offer(E e, long timeout, TimeUnit timeUnit) throws InterruptedException {
final NodeEngine nodeEngine = getNodeEngine();
final Data data = nodeEngine.toData(e);
return offerInternal(data, timeUnit.toMillis(timeout));
}
@Override
public E take() throws InterruptedException {
return poll(-1, TimeUnit.MILLISECONDS);
}
@Override
public E poll(long timeout, TimeUnit timeUnit) throws InterruptedException {
final NodeEngine nodeEngine = getNodeEngine();
final Object data = pollInternal(timeUnit.toMillis(timeout));
return nodeEngine.toObject(data);
}
@Override
public int remainingCapacity() {
return config.getMaxSize() - size();
}
@Override
public boolean remove(Object o) {
final NodeEngine nodeEngine = getNodeEngine();
final Data data = nodeEngine.toData(o);
return removeInternal(data);
}
@Override
public boolean contains(Object o) {
final NodeEngine nodeEngine = getNodeEngine();
final Data data = nodeEngine.toData(o);
List dataSet = new ArrayList(1);
dataSet.add(data);
return containsInternal(dataSet);
}
@Override
public int drainTo(Collection objects) {
return drainTo(objects, -1);
}
@Override
public int drainTo(Collection objects, int i) {
ValidationUtil.checkNotNull(objects, "Collection is null");
if (this.equals(objects)) {
throw new IllegalArgumentException("Can not drain to same Queue");
}
final NodeEngine nodeEngine = getNodeEngine();
Collection dataList = drainInternal(i);
for (Data data : dataList) {
E e = nodeEngine.toObject(data);
objects.add(e);
}
return dataList.size();
}
@Override
public E remove() {
final E res = poll();
if (res == null) {
throw new NoSuchElementException("Queue is empty!");
}
return res;
}
@Override
public E poll() {
try {
return poll(0, TimeUnit.SECONDS);
} catch (InterruptedException e) {
//todo: interrupt status is lost
return null;
}
}
@Override
public E element() {
final E res = peek();
if (res == null) {
throw new NoSuchElementException("Queue is empty!");
}
return res;
}
@Override
public E peek() {
final NodeEngine nodeEngine = getNodeEngine();
final Object data = peekInternal();
return nodeEngine.toObject(data);
}
@Override
public Iterator iterator() {
final NodeEngine nodeEngine = getNodeEngine();
return new QueueIterator(listInternal().iterator(), nodeEngine.getSerializationService(), false);
}
@Override
public Object[] toArray() {
final NodeEngine nodeEngine = getNodeEngine();
List list = listInternal();
int size = list.size();
Object[] array = new Object[size];
for (int i = 0; i < size; i++) {
array[i] = nodeEngine.toObject(list.get(i));
}
return array;
}
@Override
public T[] toArray(T[] ts) {
T[] tsParam = ts;
final NodeEngine nodeEngine = getNodeEngine();
List list = listInternal();
int size = list.size();
if (tsParam.length < size) {
tsParam = (T[]) java.lang.reflect.Array.newInstance(tsParam.getClass().getComponentType(), size);
}
for (int i = 0; i < size; i++) {
tsParam[i] = nodeEngine.toObject(list.get(i));
}
return tsParam;
}
@Override
public boolean containsAll(Collection objects) {
return containsInternal(getDataList(objects));
}
@Override
public boolean addAll(Collection es) {
return addAllInternal(toDataList(es));
}
@Override
public boolean removeAll(Collection objects) {
return compareAndRemove(getDataList(objects), false);
}
@Override
public boolean retainAll(Collection objects) {
return compareAndRemove(getDataList(objects), true);
}
private List getDataList(Collection objects) {
final NodeEngine nodeEngine = getNodeEngine();
List dataList = new ArrayList(objects.size());
for (Object o : objects) {
dataList.add(nodeEngine.toData(o));
}
return dataList;
}
private List toDataList(Collection objects) {
final NodeEngine nodeEngine = getNodeEngine();
List dataList = new ArrayList(objects.size());
for (Object o : objects) {
ValidationUtil.checkNotNull(o, "Object is null");
dataList.add(nodeEngine.toData(o));
}
return dataList;
}
@Override
public String toString() {
final StringBuilder sb = new StringBuilder();
sb.append("IQueue");
sb.append("{name='").append(name).append('\'');
sb.append('}');
return sb.toString();
}
}
