| /* |
| * 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.jackrabbit.oak.segment; |
| |
| import static com.google.common.collect.Maps.newHashMap; |
| import static org.apache.jackrabbit.oak.segment.SegmentBufferMonitor.DIRECT_BUFFER_CAPACITY; |
| import static org.apache.jackrabbit.oak.segment.SegmentBufferMonitor.DIRECT_BUFFER_COUNT; |
| import static org.apache.jackrabbit.oak.segment.SegmentBufferMonitor.HEAP_BUFFER_CAPACITY; |
| import static org.apache.jackrabbit.oak.segment.SegmentBufferMonitor.HEAP_BUFFER_COUNT; |
| import static org.apache.jackrabbit.oak.stats.SimpleStats.Type.COUNTER; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Map; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import org.apache.jackrabbit.api.stats.RepositoryStatistics; |
| import org.apache.jackrabbit.oak.stats.CounterStats; |
| import org.apache.jackrabbit.oak.stats.HistogramStats; |
| import org.apache.jackrabbit.oak.stats.MeterStats; |
| import org.apache.jackrabbit.oak.stats.SimpleStats; |
| import org.apache.jackrabbit.oak.stats.StatisticsProvider; |
| import org.apache.jackrabbit.oak.stats.StatsOptions; |
| import org.apache.jackrabbit.oak.stats.TimerStats; |
| import org.junit.Test; |
| |
| public class SegmentBufferMonitorTest { |
| |
| private final Map<String, CounterStats> stats = newHashMap(); |
| |
| private final SegmentBufferMonitor segmentBufferMonitor = new SegmentBufferMonitor(new StatisticsProvider() { |
| @Override |
| public RepositoryStatistics getStats() { |
| throw new IllegalStateException(); |
| } |
| |
| @Override |
| public MeterStats getMeter(String name, StatsOptions options) { |
| throw new IllegalStateException(); |
| } |
| |
| @Override |
| public CounterStats getCounterStats(String name, StatsOptions options) { |
| SimpleStats simpleStats = new SimpleStats(new AtomicLong(), COUNTER); |
| stats.put(name, simpleStats); |
| return simpleStats; |
| } |
| |
| @Override |
| public TimerStats getTimer(String name, StatsOptions options) { |
| throw new IllegalStateException(); |
| } |
| |
| @Override |
| public HistogramStats getHistogram(String name, StatsOptions options) { |
| throw new IllegalStateException(); |
| } |
| }); |
| |
| @Test |
| public void emptyStats() { |
| assertEquals(0, stats.get(DIRECT_BUFFER_COUNT).getCount()); |
| assertEquals(0, stats.get(DIRECT_BUFFER_CAPACITY).getCount()); |
| assertEquals(0, stats.get(HEAP_BUFFER_COUNT).getCount()); |
| assertEquals(0, stats.get(HEAP_BUFFER_CAPACITY).getCount()); |
| } |
| |
| @Test |
| public void heapBuffer() { |
| ByteBuffer buffer = ByteBuffer.allocate(42); |
| segmentBufferMonitor.trackAllocation(buffer); |
| |
| assertEquals(0, stats.get(DIRECT_BUFFER_COUNT).getCount()); |
| assertEquals(0, stats.get(DIRECT_BUFFER_CAPACITY).getCount()); |
| assertEquals(1, stats.get(HEAP_BUFFER_COUNT).getCount()); |
| assertEquals(42, stats.get(HEAP_BUFFER_CAPACITY).getCount()); |
| |
| buffer = null; |
| System.gc(); |
| |
| assertEquals(0, stats.get(DIRECT_BUFFER_COUNT).getCount()); |
| assertEquals(0, stats.get(DIRECT_BUFFER_CAPACITY).getCount()); |
| assertTrue(stats.get(HEAP_BUFFER_COUNT).getCount() <= 1); |
| assertTrue(stats.get(HEAP_BUFFER_CAPACITY).getCount() <= 42); |
| } |
| |
| @Test |
| public void directBuffer() { |
| ByteBuffer buffer = ByteBuffer.allocateDirect(42); |
| segmentBufferMonitor.trackAllocation(buffer); |
| |
| assertEquals(1, stats.get(DIRECT_BUFFER_COUNT).getCount()); |
| assertEquals(42, stats.get(DIRECT_BUFFER_CAPACITY).getCount()); |
| assertEquals(0, stats.get(HEAP_BUFFER_COUNT).getCount()); |
| assertEquals(0, stats.get(HEAP_BUFFER_CAPACITY).getCount()); |
| |
| buffer = null; |
| System.gc(); |
| |
| assertTrue(stats.get(DIRECT_BUFFER_COUNT).getCount() <= 1); |
| assertTrue(stats.get(DIRECT_BUFFER_CAPACITY).getCount() <= 42); |
| assertEquals(0, stats.get(HEAP_BUFFER_COUNT).getCount()); |
| assertEquals(0, stats.get(HEAP_BUFFER_CAPACITY).getCount()); |
| } |
| } |