| /* |
| * 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.samza.storage.kv; |
| |
| import java.io.File; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.List; |
| import java.util.Random; |
| import java.util.Set; |
| import org.apache.samza.SamzaException; |
| import org.apache.samza.config.Config; |
| import org.apache.samza.config.MapConfig; |
| import org.apache.samza.metrics.Counter; |
| import org.apache.samza.metrics.Gauge; |
| import org.apache.samza.metrics.MetricsRegistryMap; |
| import org.apache.samza.metrics.MetricsVisitor; |
| import org.apache.samza.metrics.Timer; |
| import org.apache.samza.serializers.Serde; |
| import org.apache.samza.serializers.StringSerde; |
| import org.junit.After; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.rocksdb.FlushOptions; |
| import org.rocksdb.Options; |
| import org.rocksdb.WriteOptions; |
| |
| |
| /** |
| * This class is used to test whether the key value size metrics in {@link SerializedKeyValueStoreMetrics} works correctly. |
| */ |
| public class TestKeyValueSizeHistogramMetric { |
| |
| private static String storeName = "teststore"; |
| private static String keyPrefix = "key-size-bytes-histogram"; |
| private static String valuePrefix = "value-size-bytes-histogram"; |
| private static MetricsRegistryMap metricsRegistry = new MetricsRegistryMap(); |
| private static KeyValueStoreMetrics keyValueStoreMetrics = new KeyValueStoreMetrics(storeName, metricsRegistry); |
| private static SerializedKeyValueStoreMetrics serializedKeyValueStoreMetrics = |
| new SerializedKeyValueStoreMetrics(storeName, metricsRegistry); |
| private static Serde<String> stringSerde = new StringSerde(); |
| private static Random random = new Random(); |
| |
| private KeyValueStore<String, String> store = null; |
| |
| @Before |
| public void setup() { |
| |
| Config config = new MapConfig(); |
| Options options = new Options(); |
| options.setCreateIfMissing(true); |
| |
| File dbDir = new File(System.getProperty("java.io.tmpdir") + "/dbStore" + System.currentTimeMillis()); |
| RocksDbKeyValueStore kvStore = new RocksDbKeyValueStore(dbDir, options, config, false, "dbStore", |
| new WriteOptions(), new FlushOptions(), new KeyValueStoreMetrics("dbStore", new MetricsRegistryMap())); |
| KeyValueStore<String, String> serializedStore = |
| new SerializedKeyValueStore<>(kvStore, stringSerde, stringSerde, serializedKeyValueStoreMetrics); |
| store = new NullSafeKeyValueStore<>(serializedStore); |
| } |
| |
| /** |
| * Make sure that the histograms can record the key value size and we can use a |
| * {@link MetricsVisitor} to get access to the value store in the histograms |
| */ |
| @Test |
| public void testHistogramMetric() { |
| |
| List<String> keys = new ArrayList<>(); |
| List<String> values = new ArrayList<>(); |
| |
| for (int i = 0; i < 300; i++) { |
| keys.add(getRandomString()); |
| values.add(getRandomString()); |
| } |
| |
| for (int i = 0; i < keys.size(); i++) { |
| store.put(keys.get(i), values.get(i)); |
| } |
| |
| Set<String> names = new HashSet<>(); |
| for (Double p : serializedKeyValueStoreMetrics.record_key_size_percentiles()) { |
| names.add(storeName + "-" + keyPrefix + "_" + p); |
| } |
| |
| for (Double p : serializedKeyValueStoreMetrics.record_value_size_percentiles()) { |
| names.add(storeName + "-" + valuePrefix + "_" + p); |
| } |
| |
| metricsRegistry.getGroups().forEach(group -> metricsRegistry.getGroup(group.toString()).forEach((name, metric) -> { |
| if (names.contains(name)) { |
| metric.visit(new MetricsVisitor() { |
| @Override |
| public void counter(Counter counter) { |
| |
| } |
| |
| @Override |
| public <T> void gauge(Gauge<T> gauge) { |
| Double num = (Double) gauge.getValue(); |
| Assert.assertNotEquals(0D, (Double) gauge.getValue(), 0.0001); |
| } |
| |
| @Override |
| public void timer(Timer timer) { |
| |
| } |
| }); |
| } |
| })); |
| } |
| |
| private String getRandomString() { |
| int leftLimit = 97; // letter 'a' |
| int rightLimit = 122; // letter 'z' |
| int maxLength = 100; |
| |
| String generatedString = random.ints(leftLimit, rightLimit + 1) |
| .limit(random.nextInt(maxLength)) |
| .collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append) |
| .toString(); |
| |
| return generatedString; |
| } |
| |
| @After |
| public void teardown() { |
| try { |
| store.close(); |
| } catch (SamzaException e) { |
| e.printStackTrace(); |
| } |
| } |
| } |