dachuan9e commented on a change in pull request #11585: URL: https://github.com/apache/shardingsphere/pull/11585#discussion_r679822672
########## File path: shardingsphere-agent/shardingsphere-agent-plugins/shardingsphere-agent-plugin-metrics/shardingsphere-agent-metrics-prometheus/src/main/java/org/apache/shardingsphere/agent/metrics/prometheus/wrapper/PrometheusWrapperFactory.java ########## @@ -0,0 +1,171 @@ +/* + * 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.shardingsphere.agent.metrics.prometheus.wrapper; + +import io.prometheus.client.Counter; +import io.prometheus.client.Gauge; +import io.prometheus.client.Histogram; +import io.prometheus.client.Summary; +import lombok.extern.slf4j.Slf4j; +import org.apache.shardingsphere.agent.metrics.api.MetricsWrapper; +import org.apache.shardingsphere.agent.metrics.api.MetricsWrapperFactory; +import org.yaml.snakeyaml.Yaml; + +import java.io.InputStream; +import java.util.LinkedHashMap; +import java.util.List; +import java.util.Map; +import java.util.Optional; + +/** + * Prometheus metrics wrapper factory. + */ +@Slf4j +public final class PrometheusWrapperFactory implements MetricsWrapperFactory { + + private static List metrics; + + static { + Yaml yaml = new Yaml(); + InputStream in = PrometheusWrapperFactory.class.getResourceAsStream("/metrics.yaml"); + Map metricsMap = yaml.loadAs(in, LinkedHashMap.class); + metrics = (List) metricsMap.get("metrics"); + } + + @Override + public Optional<MetricsWrapper> create(final String id) { + return createById(id); + } + + private Optional<MetricsWrapper> createById(final String id) { + Map metric = findById(id); + if (null == metric || null == getType(metric)) { + return Optional.ofNullable(null); + } + switch (getType(metric).toUpperCase()) { + case "COUNTER": + return createCounter(metric); + case "GAUGE": + return createGauge(metric); + case "HISTOGRAM": + return createHistogram(metric); + case "SUMMARY": + return createSummary(metric); + case "DELEGATE": + return Optional.of(new DelegateWrapper(id)); + default: + return Optional.ofNullable(null); + } + } + + private Optional<MetricsWrapper> createCounter(final Map metric) { + Counter.Builder builder = Counter.build() + .name(getName(metric)) + .help(getHelp(metric)); + if (null != getLabels(metric)) { + builder.labelNames(getLabels(metric).stream().toArray(String[]::new)); + } + Counter counter = builder.register(); + CounterWrapper wrapper = new CounterWrapper(counter); + return Optional.of(wrapper); + } + + private Optional<MetricsWrapper> createGauge(final Map metric) { + Gauge.Builder builder = Gauge.build() + .name(getName(metric)) + .help(getHelp(metric)); + if (null != getLabels(metric)) { + builder.labelNames(getLabels(metric).stream().toArray(String[]::new)); + } + Gauge gauge = builder.register(); + GaugeWrapper wrapper = new GaugeWrapper(gauge); + return Optional.of(wrapper); + } + + private Optional<MetricsWrapper> createHistogram(final Map metric) { + Histogram.Builder builder = Histogram.build() + .name(getName(metric)) + .help(getHelp(metric)); + if (null != getLabels(metric)) { + builder.labelNames(getLabels(metric).stream().toArray(String[]::new)); + } + if (null != getProps(metric)) { + parserHistogramProps(builder, getProps(metric)); + } + Histogram histogram = builder.register(); + HistogramWrapper wrapper = new HistogramWrapper(histogram); + return Optional.of(wrapper); + } + + private Optional<MetricsWrapper> createSummary(final Map metric) { + Summary.Builder builder = Summary.build() + .name(getName(metric)) + .help(getHelp(metric)); + if (null != getLabels(metric)) { + builder.labelNames(getLabels(metric).stream().toArray(String[]::new)); + } + Summary summary = builder.register(); + SummaryWrapper wrapper = new SummaryWrapper(summary); + return Optional.of(wrapper); + } + + private void parserHistogramProps(final Histogram.Builder builder, final Map props) { + if (null != props.get("buckets")) { Review comment: good -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
