| /* |
| * 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.nifi.processor.util; |
| |
| import org.apache.nifi.flowfile.FlowFile; |
| import org.apache.nifi.processor.DataUnit; |
| import org.apache.nifi.processor.FlowFileFilter; |
| |
| public class FlowFileFilters { |
| |
| /** |
| * Returns a new {@link FlowFileFilter} that will pull FlowFiles until the |
| * maximum file size has been reached, or the maximum FlowFile Count was |
| * been reached (this is important because FlowFiles may be 0 bytes!). If |
| * the first FlowFile exceeds the max size, the FlowFile will be selected |
| * and no other FlowFile will be. |
| * |
| * @param maxSize the maximum size of the group of FlowFiles |
| * @param unit the unit of the <code>maxSize</code> argument |
| * @param maxCount the maximum number of FlowFiles to pull |
| * @return filter |
| */ |
| public static FlowFileFilter newSizeBasedFilter(final double maxSize, final DataUnit unit, final int maxCount) { |
| final double maxBytes = DataUnit.B.convert(maxSize, unit); |
| |
| return new FlowFileFilter() { |
| int count = 0; |
| long size = 0L; |
| |
| @Override |
| public FlowFileFilterResult filter(final FlowFile flowFile) { |
| if (count == 0) { |
| count++; |
| size += flowFile.getSize(); |
| |
| return FlowFileFilterResult.ACCEPT_AND_CONTINUE; |
| } |
| |
| if ((size + flowFile.getSize() > maxBytes) || (count + 1 > maxCount)) { |
| return FlowFileFilterResult.REJECT_AND_TERMINATE; |
| } |
| |
| count++; |
| size += flowFile.getSize(); |
| return FlowFileFilterResult.ACCEPT_AND_CONTINUE; |
| } |
| |
| }; |
| } |
| |
| } |