/*
* 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.controller.queue;
import java.util.Comparator;
/**
* Specifies which column to sort on when performing a Listing of FlowFiles via
* {@link FlowFileQueue#listFlowFiles(String, SortColumn, SortDirection)}
*/
public enum SortColumn implements Comparator<FlowFileSummary> {
/**
* Sort based on the current position in the queue
*/
QUEUE_POSITION(new Comparator<FlowFileSummary>() {
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return Integer.compare(o1.getPosition(), o2.getPosition());
}
}),
/**
* Sort based on the UUID of the FlowFile
*/
FLOWFILE_UUID(new Comparator<FlowFileSummary>() {
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return o1.getUuid().compareTo(o2.getUuid());
}
}),
/**
* Sort based on the 'filename' attribute of the FlowFile
*/
FILENAME(new Comparator<FlowFileSummary>() {
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return o1.getFilename().compareTo(o2.getFilename());
}
}),
/**
* Sort based on the size of the FlowFile
*/
FLOWFILE_SIZE(new Comparator<FlowFileSummary>() {
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return Long.compare(o1.getSize(), o2.getSize());
}
}),
/**
* Sort based on how long the FlowFile has been sitting in the queue
*/
QUEUED_DURATION(new Comparator<FlowFileSummary>() {
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return -Long.compare(o1.getLastQueuedTime(), o2.getLastQueuedTime());
}
}),
/**
* Sort based on the age of the FlowFile. I.e., the time at which the FlowFile's
* "greatest ancestor" entered the flow
*/
FLOWFILE_AGE(new Comparator<FlowFileSummary>() {
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return Long.compare(o1.getLineageStartDate(), o2.getLineageStartDate());
}
}),
/**
* Sort based on when the FlowFile's penalization ends
*/
PENALIZATION(new Comparator<FlowFileSummary>() {
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return Boolean.compare(o1.isPenalized(), o2.isPenalized());
}
});
private final Comparator<FlowFileSummary> comparator;
private SortColumn(final Comparator<FlowFileSummary> comparator) {
this.comparator = comparator;
}
@Override
public int compare(final FlowFileSummary o1, final FlowFileSummary o2) {
return comparator.compare(o1, o2);
}
}