| /** |
| * 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.storm.metric.util; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import org.apache.storm.metric.api.IMetricsConsumer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class DataPointExpander implements Serializable { |
| public static final Logger LOG = LoggerFactory.getLogger(DataPointExpander.class); |
| |
| private final boolean expandMapType; |
| private final String metricNameSeparator; |
| |
| public DataPointExpander(boolean expandMapType, String metricNameSeparator) { |
| this.expandMapType = expandMapType; |
| this.metricNameSeparator = metricNameSeparator; |
| } |
| |
| public Collection<IMetricsConsumer.DataPoint> expandDataPoints(Collection<IMetricsConsumer.DataPoint> dataPoints) { |
| if (!expandMapType) { |
| return dataPoints; |
| } |
| |
| List<IMetricsConsumer.DataPoint> expandedDataPoints = new ArrayList<>(); |
| |
| for (IMetricsConsumer.DataPoint dataPoint : dataPoints) { |
| expandedDataPoints.addAll(expandDataPoint(dataPoint)); |
| } |
| |
| return expandedDataPoints; |
| } |
| |
| public Collection<IMetricsConsumer.DataPoint> expandDataPoint(IMetricsConsumer.DataPoint dataPoint) { |
| if (!expandMapType) { |
| return Collections.singletonList(dataPoint); |
| } |
| |
| List<IMetricsConsumer.DataPoint> dataPoints = new ArrayList<>(); |
| |
| if (dataPoint.value == null) { |
| LOG.warn("Data point with name {} is null. Discarding.", dataPoint.name); |
| } else if (dataPoint.value instanceof Map) { |
| Map<Object, Object> dataMap = (Map<Object, Object>) dataPoint.value; |
| |
| for (Map.Entry<Object, Object> entry : dataMap.entrySet()) { |
| String expandedDataPointName = dataPoint.name + metricNameSeparator + String.valueOf(entry.getKey()); |
| dataPoints.add(new IMetricsConsumer.DataPoint(expandedDataPointName, entry.getValue())); |
| } |
| } else { |
| dataPoints.add(dataPoint); |
| } |
| |
| return dataPoints; |
| } |
| |
| } |