mirror of https://github.com/apache/cassandra
61 lines
2.2 KiB
Java
61 lines
2.2 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.cassandra.metrics;
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import org.junit.Assert;
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import org.junit.Test;
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import org.agrona.concurrent.NoOpLock;
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public class HitRateTest
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{
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static long M = 1024;
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@Test
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public void testRollingCounters()
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{
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ShardedHitRate.HitRateShard shard = new ShardedHitRate.HitRateShard(new NoOpLock());
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ShardedHitRate.Snapshot snapshot = new ShardedHitRate.Snapshot();
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long now = M/2;
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shard.markHitExclusive(now);
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shard.markHitExclusive(now);
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shard.markHitExclusive(now += M);
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shard.markHitExclusive(now);
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shard.markHitExclusive(now += M);
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shard.markHitExclusive(now);
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shard.markHitExclusive(now += M);
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shard.markHitExclusive(now);
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shard.markHitExclusive(now += M);
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shard.markHitExclusive(now);
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shard.updateSnapshot(snapshot, now);
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Assert.assertEquals(10, snapshot.totalHits);
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Assert.assertEquals(3, snapshot.requests(1));
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Assert.assertEquals(9, snapshot.requests(4));
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Assert.assertEquals(10, snapshot.requests(5));
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Assert.assertEquals(10, snapshot.requests(6));
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snapshot.reset();
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shard.updateSnapshot(snapshot, now + M/2);
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Assert.assertEquals(10, snapshot.totalHits);
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Assert.assertEquals(2, snapshot.requests(1));
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Assert.assertEquals(8, snapshot.requests(4));
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Assert.assertEquals(10, snapshot.requests(5));
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Assert.assertEquals(10, snapshot.requests(6));
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}
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}
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