| /* |
| * 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.ConstOne; |
| import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.Entrance; |
| import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.MetricsFunction; |
| import org.apache.skywalking.oap.server.core.analysis.metrics.annotation.SourceFrom; |
| import org.apache.skywalking.oap.server.core.query.sql.Function; |
| import org.apache.skywalking.oap.server.core.storage.annotation.Column; |
| |
| @MetricsFunction(functionName = "doubleAvg") |
| public abstract class DoubleAvgMetrics extends Metrics implements DoubleValueHolder { |
| |
| protected static final String SUMMATION = "double_summation"; |
| protected static final String COUNT = "count"; |
| protected static final String VALUE = "double_value"; |
| |
| @Getter |
| @Setter |
| @Column(columnName = SUMMATION, storageOnly = true) |
| private double summation; |
| @Getter |
| @Setter |
| @Column(columnName = COUNT, storageOnly = true) |
| private long count; |
| @Getter |
| @Setter |
| @Column(columnName = VALUE, dataType = Column.ValueDataType.COMMON_VALUE, function = Function.Avg) |
| private double value; |
| |
| @Entrance |
| public final void combine(@SourceFrom double summation, @ConstOne long count) { |
| this.summation += summation; |
| this.count += count; |
| } |
| |
| @Override |
| public final boolean combine(Metrics metrics) { |
| DoubleAvgMetrics doubleAvgMetrics = (DoubleAvgMetrics) metrics; |
| combine(doubleAvgMetrics.summation, doubleAvgMetrics.count); |
| return true; |
| } |
| |
| @Override |
| public final void calculate() { |
| this.value = this.summation / this.count; |
| } |
| } |