| /* |
| * 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.skywalking.oap.server.core.analysis.metrics; |
| |
| import lombok.Getter; |
| import lombok.Setter; |
| import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.Entrance; |
| import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.Expression; |
| import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.MetricsFunction; |
| import org.apache.skywalking.oap.server.core.storage.annotation.BanyanDB; |
| import org.apache.skywalking.oap.server.core.storage.annotation.Column; |
| |
| @MetricsFunction(functionName = "rate") |
| public abstract class RateMetrics extends Metrics implements IntValueHolder { |
| protected static final String DENOMINATOR = "denominator"; |
| protected static final String NUMERATOR = "numerator"; |
| protected static final String PERCENTAGE = "percentage"; |
| |
| @Getter |
| @Setter |
| @Column(name = DENOMINATOR) |
| @BanyanDB.MeasureField |
| private long denominator; |
| @Getter |
| @Setter |
| @Column(name = PERCENTAGE, dataType = Column.ValueDataType.COMMON_VALUE) |
| @BanyanDB.MeasureField |
| private int percentage; |
| @Getter |
| @Setter |
| @Column(name = NUMERATOR) |
| @BanyanDB.MeasureField |
| private long numerator; |
| |
| @Entrance |
| public final void combine(@Expression boolean isNumerator, @Expression boolean isDenominator) { |
| if (isNumerator) { |
| numerator++; |
| } |
| if (isDenominator) { |
| denominator++; |
| } |
| } |
| |
| @Override |
| public final boolean combine(Metrics metrics) { |
| denominator += ((RateMetrics) metrics).denominator; |
| numerator += ((RateMetrics) metrics).numerator; |
| return true; |
| } |
| |
| @Override |
| public void calculate() { |
| if (denominator == 0) { |
| return; |
| } |
| percentage = (int) (numerator * 10000 / denominator); |
| } |
| |
| @Override |
| public int getValue() { |
| return percentage; |
| } |
| } |