| /* |
| * 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.structuredstreaming.metrics; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import org.apache.beam.runners.spark.structuredstreaming.aggregators.NamedAggregators; |
| import org.apache.spark.metrics.source.Source; |
| |
| /** |
| * A Spark {@link Source} that is tailored to expose an {@link AggregatorMetric}, wrapping an |
| * underlying {@link NamedAggregators} instance. |
| */ |
| public class AggregatorMetricSource implements Source { |
| private static final String METRIC_NAME = "Aggregators"; |
| |
| private final String name; |
| |
| private final MetricRegistry metricRegistry = new MetricRegistry(); |
| |
| public AggregatorMetricSource(final String name, final NamedAggregators aggregators) { |
| this.name = name; |
| metricRegistry.register(METRIC_NAME, AggregatorMetric.of(aggregators)); |
| } |
| |
| @Override |
| public String sourceName() { |
| return name; |
| } |
| |
| @Override |
| public MetricRegistry metricRegistry() { |
| return metricRegistry; |
| } |
| } |