| /*- |
| * 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.sling.query.impl.iterator; |
| |
| import java.util.Iterator; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class WarningIterator<T> extends AbstractIterator<T> { |
| |
| private static final Logger LOG = LoggerFactory.getLogger("SlingQuery"); |
| |
| private static final int DEFAULT_LIMIT = 100; |
| |
| private final Iterator<T> iterator; |
| |
| private final int limit; |
| |
| private int count = 0; |
| |
| public WarningIterator(Iterator<T> iterator) { |
| this(iterator, DEFAULT_LIMIT); |
| } |
| |
| public WarningIterator(Iterator<T> iterator, int limit) { |
| this.iterator = iterator; |
| this.limit = limit; |
| } |
| |
| @Override |
| protected T getElement() { |
| if (!iterator.hasNext()) { |
| return null; |
| } |
| if (count++ == limit) { |
| LOG.warn( |
| "Number of processed resources exceeded {}. Consider using a JCR query instead of SlingQuery. More info here: https://s.apache.org/oana", |
| new Object[] { limit }); |
| } |
| return iterator.next(); |
| } |
| |
| } |