| /* |
| * 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.beam.runners.spark.metrics; |
| |
| import com.codahale.metrics.Gauge; |
| import com.codahale.metrics.Metric; |
| import com.codahale.metrics.MetricFilter; |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.apache.beam.runners.spark.aggregators.NamedAggregators; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** An adapter between the {@link NamedAggregators} and the Dropwizard {@link Metric} interface. */ |
| public class AggregatorMetric extends BeamMetricSet { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AggregatorMetric.class); |
| |
| private final NamedAggregators namedAggregators; |
| |
| private AggregatorMetric(NamedAggregators namedAggregators) { |
| this.namedAggregators = namedAggregators; |
| } |
| |
| public static AggregatorMetric of(NamedAggregators namedAggregators) { |
| return new AggregatorMetric(namedAggregators); |
| } |
| |
| @Override |
| public Map<String, Gauge<Double>> getValue(String prefix, MetricFilter filter) { |
| Map<String, Gauge<Double>> metrics = new HashMap<>(); |
| for (Map.Entry<String, ?> entry : namedAggregators.renderAll().entrySet()) { |
| String name = prefix + "." + entry.getKey(); |
| Object rawValue = entry.getValue(); |
| if (rawValue != null) { |
| try { |
| Gauge<Double> gauge = staticGauge(rawValue); |
| if (filter.matches(name, gauge)) { |
| metrics.put(name, gauge); |
| } |
| } catch (NumberFormatException e) { |
| LOG.warn( |
| "Metric `{}` of type {} can't be reported, conversion to double failed.", |
| name, |
| rawValue.getClass().getSimpleName(), |
| e); |
| } |
| } |
| } |
| return metrics; |
| } |
| |
| // Metric type is assumed to be compatible with Double |
| protected Gauge<Double> staticGauge(Object rawValue) throws NumberFormatException { |
| return rawValue instanceof Number |
| ? super.staticGauge((Number) rawValue) |
| : super.staticGauge(Double.parseDouble(rawValue.toString())); |
| } |
| } |