/*
* 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.prioritizer;
import org.apache.nifi.flowfile.FlowFile;
import org.apache.nifi.flowfile.FlowFilePrioritizer;
public class FirstInFirstOutPrioritizer implements FlowFilePrioritizer {
@Override
public int compare(final FlowFile o1, final FlowFile o2) {
if (o1 == null && o2 == null) {
return 0;
} else if (o2 == null) {
return -1;
} else if (o1 == null) {
return 1;
}
final int dateComparison = o1.getLastQueueDate().compareTo(o2.getLastQueueDate());
if (dateComparison != 0) {
return dateComparison;
}
return Long.compare(o1.getQueueDateIndex(), o2.getQueueDateIndex());
}
}