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Add support of PrometheusRawMetricsProvider for the Pulsar-Proxy (apa…
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.../main/java/org/apache/pulsar/broker/stats/prometheus/PrometheusMetricsGeneratorUtils.java
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| /** | ||
| * 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.pulsar.broker.stats.prometheus; | ||
|
|
||
| import io.netty.buffer.ByteBuf; | ||
| import io.netty.buffer.ByteBufAllocator; | ||
| import io.prometheus.client.Collector; | ||
| import io.prometheus.client.CollectorRegistry; | ||
| import java.io.IOException; | ||
| import java.io.OutputStream; | ||
| import java.util.Enumeration; | ||
| import java.util.List; | ||
| import org.apache.pulsar.common.util.SimpleTextOutputStream; | ||
|
|
||
| /** | ||
| * Generate metrics in a text format suitable to be consumed by Prometheus. | ||
| * Format specification can be found at {@link https://prometheus.io/docs/instrumenting/exposition_formats/} | ||
| */ | ||
| public class PrometheusMetricsGeneratorUtils { | ||
|
|
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| public static void generate(String cluster, OutputStream out, | ||
| List<PrometheusRawMetricsProvider> metricsProviders) | ||
| throws IOException { | ||
| ByteBuf buf = ByteBufAllocator.DEFAULT.heapBuffer(); | ||
| try { | ||
| SimpleTextOutputStream stream = new SimpleTextOutputStream(buf); | ||
| generateSystemMetrics(stream, cluster); | ||
| if (metricsProviders != null) { | ||
| for (PrometheusRawMetricsProvider metricsProvider : metricsProviders) { | ||
| metricsProvider.generate(stream); | ||
| } | ||
| } | ||
| out.write(buf.array(), buf.arrayOffset(), buf.readableBytes()); | ||
| } finally { | ||
| buf.release(); | ||
| } | ||
| } | ||
|
|
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| public static void generateSystemMetrics(SimpleTextOutputStream stream, String cluster) { | ||
| Enumeration<Collector.MetricFamilySamples> metricFamilySamples = | ||
| CollectorRegistry.defaultRegistry.metricFamilySamples(); | ||
| while (metricFamilySamples.hasMoreElements()) { | ||
| Collector.MetricFamilySamples metricFamily = metricFamilySamples.nextElement(); | ||
|
|
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| // Write type of metric | ||
| stream.write("# TYPE ").write(metricFamily.name).write(' ') | ||
| .write(getTypeStr(metricFamily.type)).write('\n'); | ||
|
|
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| for (int i = 0; i < metricFamily.samples.size(); i++) { | ||
| Collector.MetricFamilySamples.Sample sample = metricFamily.samples.get(i); | ||
| stream.write(sample.name); | ||
| stream.write("{cluster=\"").write(cluster).write('"'); | ||
| for (int j = 0; j < sample.labelNames.size(); j++) { | ||
| String labelValue = sample.labelValues.get(j); | ||
| if (labelValue != null) { | ||
| labelValue = labelValue.replace("\"", "\\\""); | ||
| } | ||
|
|
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| stream.write(","); | ||
| stream.write(sample.labelNames.get(j)); | ||
| stream.write("=\""); | ||
| stream.write(labelValue); | ||
| stream.write('"'); | ||
| } | ||
|
|
||
| stream.write("} "); | ||
| stream.write(Collector.doubleToGoString(sample.value)); | ||
| stream.write('\n'); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| static String getTypeStr(Collector.Type type) { | ||
| switch (type) { | ||
| case COUNTER: | ||
| return "counter"; | ||
| case GAUGE: | ||
| return "gauge"; | ||
| case SUMMARY : | ||
| return "summary"; | ||
| case HISTOGRAM: | ||
| return "histogram"; | ||
| case UNTYPED: | ||
| default: | ||
| return "untyped"; | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
|
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...r-broker-common/src/main/java/org/apache/pulsar/broker/stats/prometheus/package-info.java
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| @@ -0,0 +1,19 @@ | ||
| /** | ||
| * 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.pulsar.broker.stats.prometheus; |
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