| /* |
| * 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.cassandra.metrics; |
| |
| import com.codahale.metrics.Counter; |
| import com.codahale.metrics.Gauge; |
| import com.codahale.metrics.RatioGauge; |
| import org.apache.cassandra.cql3.QueryProcessor; |
| |
| import static org.apache.cassandra.metrics.CassandraMetricsRegistry.Metrics; |
| |
| public class CQLMetrics |
| { |
| private static final MetricNameFactory factory = new DefaultNameFactory("CQL"); |
| |
| public final Counter regularStatementsExecuted; |
| public final Counter preparedStatementsExecuted; |
| public final Counter preparedStatementsEvicted; |
| |
| public final Counter useStatementsExecuted; |
| |
| public final Gauge<Integer> preparedStatementsCount; |
| public final Gauge<Double> preparedStatementsRatio; |
| |
| public CQLMetrics() |
| { |
| regularStatementsExecuted = Metrics.counter(factory.createMetricName("RegularStatementsExecuted")); |
| preparedStatementsExecuted = Metrics.counter(factory.createMetricName("PreparedStatementsExecuted")); |
| preparedStatementsEvicted = Metrics.counter(factory.createMetricName("PreparedStatementsEvicted")); |
| |
| useStatementsExecuted = Metrics.counter(factory.createMetricName("UseStatementsExecuted")); |
| |
| preparedStatementsCount = Metrics.register(factory.createMetricName("PreparedStatementsCount"), QueryProcessor::preparedStatementsCount); |
| preparedStatementsRatio = Metrics.register(factory.createMetricName("PreparedStatementsRatio"), new RatioGauge() |
| { |
| public Ratio getRatio() |
| { |
| return Ratio.of(getNumerator(), getDenominator()); |
| } |
| |
| public double getNumerator() |
| { |
| return preparedStatementsExecuted.getCount(); |
| } |
| |
| public double getDenominator() |
| { |
| return regularStatementsExecuted.getCount() + preparedStatementsExecuted.getCount(); |
| } |
| }); |
| } |
| } |