| /* |
| * 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.status.history; |
| |
| import org.junit.Test; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.Date; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| public class TestMetricRollingBuffer { |
| private static final Set<MetricDescriptor<?>> PROCESSOR_METRICS = Arrays.stream(ProcessorStatusDescriptor.values()) |
| .map(ProcessorStatusDescriptor::getDescriptor) |
| .collect(Collectors.toSet()); |
| |
| @Test |
| public void testBufferGrows() { |
| final int bufferCapacity = 1000; |
| final MetricRollingBuffer buffer = new MetricRollingBuffer(bufferCapacity); |
| |
| final long startTime = System.currentTimeMillis(); |
| final List<Date> timestamps = new ArrayList<>(); |
| |
| int iterations = 1440; |
| for (int i=0; i < iterations; i++) { |
| final StandardStatusSnapshot snapshot = new StandardStatusSnapshot(PROCESSOR_METRICS); |
| snapshot.setTimestamp(new Date(startTime + i * 1000)); |
| timestamps.add(snapshot.getTimestamp()); |
| |
| snapshot.addStatusMetric(ProcessorStatusDescriptor.BYTES_WRITTEN.getDescriptor(), Long.valueOf(i)); |
| |
| buffer.update(snapshot); |
| } |
| |
| assertEquals(bufferCapacity, buffer.size()); |
| |
| final List<StatusSnapshot> snapshots = buffer.getSnapshots(timestamps, true, PROCESSOR_METRICS); |
| assertEquals(iterations, snapshots.size()); |
| |
| final int expectedEmptyCount = iterations - bufferCapacity; |
| final long emptyCount = snapshots.stream().filter(snapshot -> snapshot instanceof EmptyStatusSnapshot).count(); |
| assertEquals(expectedEmptyCount, emptyCount); |
| |
| for (int i=0; i < iterations; i++) { |
| final StatusSnapshot snapshot = snapshots.get(i); |
| if (i < expectedEmptyCount) { |
| assertTrue("Snapshot at i=" + i + " is not an EmptyStatusSnapshot", snapshot instanceof EmptyStatusSnapshot); |
| } else { |
| assertEquals(Long.valueOf(i), snapshot.getStatusMetric(ProcessorStatusDescriptor.BYTES_WRITTEN.getDescriptor())); |
| assertFalse(snapshot instanceof EmptyStatusSnapshot); |
| } |
| } |
| } |
| |
| @Test |
| public void testBufferShrinks() { |
| // Cause buffer to grow |
| final int bufferCapacity = 1000; |
| final MetricRollingBuffer buffer = new MetricRollingBuffer(bufferCapacity); |
| |
| final long startTime = System.currentTimeMillis(); |
| |
| int iterations = 1440; |
| for (int i=0; i < iterations; i++) { |
| final StandardStatusSnapshot snapshot = new StandardStatusSnapshot(PROCESSOR_METRICS); |
| snapshot.setTimestamp(new Date(startTime + i * 1000)); |
| |
| snapshot.addStatusMetric(ProcessorStatusDescriptor.BYTES_WRITTEN.getDescriptor(), Long.valueOf(i)); |
| buffer.update(snapshot); |
| } |
| |
| assertEquals(bufferCapacity, buffer.size()); |
| |
| // Expire data ensure that the buffer shrinks |
| final long lastTimestamp = startTime + 1440 * 1000; |
| buffer.expireBefore(new Date(lastTimestamp - 144_001L)); |
| assertEquals(144, buffer.size()); |
| |
| buffer.expireBefore(new Date(lastTimestamp - 16_001L)); |
| assertEquals(16, buffer.size()); |
| |
| buffer.expireBefore(new Date(lastTimestamp)); |
| assertEquals(0, buffer.size()); |
| |
| // Ensure that we can now properly add data again |
| long insertStart = lastTimestamp + 10_000L; |
| final List<Date> timestamps = new ArrayList<>(); |
| for (int i=0; i < 4; i++) { |
| final StandardStatusSnapshot snapshot = new StandardStatusSnapshot(PROCESSOR_METRICS); |
| snapshot.setTimestamp(new Date(insertStart + i * 1000)); |
| timestamps.add(snapshot.getTimestamp()); |
| |
| snapshot.addStatusMetric(ProcessorStatusDescriptor.BYTES_WRITTEN.getDescriptor(), Long.valueOf(i)); |
| buffer.update(snapshot); |
| } |
| |
| assertEquals(4, buffer.size()); |
| final List<StatusSnapshot> snapshots = buffer.getSnapshots(timestamps, true, PROCESSOR_METRICS); |
| assertEquals(4, snapshots.size()); |
| for (int i=0; i < 4; i++) { |
| final StatusSnapshot snapshot = snapshots.get(i); |
| assertEquals(Long.valueOf(i), snapshot.getStatusMetric(ProcessorStatusDescriptor.BYTES_WRITTEN.getDescriptor())); |
| } |
| } |
| } |