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Add Simpleclient Backwards-Compatibility Module
Signed-off-by: Fabian Stäber <fabian@fstab.de>
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‎examples/example-exporter-httpserver/pom.xml‎

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<configuration>
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<transformers>
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<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<mainClass>io.prometheus.metrics.examples.httpserver.Main</mainClass>
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<mainClass>io.prometheus.metrics.examples.simpleclient.Main</mainClass>
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</transformer>
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</transformers>
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</configuration>

‎examples/example-simpleclient-bridge/README.md‎

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# Built-in HTTPServer for Exposing Metrics
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## Build
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This example is built as part of the `client_java` project.
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```
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./mvnw package
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```
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## Run
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The build creates a JAR file with the example application in `./examples/example-simpleclient-bridge/target/`.
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```
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java -jar ./examples/example-simpleclient-bridge/target/example-simpleclient-bridge.jar
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```
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This should expose a metrics endpoint on [http://localhost:9400/metrics](http://localhost:9400/metrics).
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The `events_total` counter should be exposed.with a Web browser should yield an example of a counter metric.
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```
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# HELP events_total total number of events
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# TYPE events_total counter
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events_total 1.0
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```

‎examples/example-simpleclient-bridge/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>io.prometheus</groupId>
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<artifactId>examples</artifactId>
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<version>1.0.0-alpha-5-SNAPSHOT</version>
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</parent>
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<artifactId>example-simpleclient-bridge</artifactId>
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<name>Example - Simpleclient Bridge</name>
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<description>
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Prometheus Metrics Example of the Simpleclient Backwards Compatibility module
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</description>
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<licenses>
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<license>
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<name>The Apache Software License, Version 2.0</name>
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<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
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<distribution>repo</distribution>
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</license>
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</licenses>
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<developers>
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<developer>
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<id>fstab</id>
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<name>Fabian Stäber</name>
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<email>fabian@fstab.de</email>
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</developer>
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</developers>
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<dependencies>
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<dependency>
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<groupId>io.prometheus</groupId>
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<artifactId>simpleclient</artifactId>
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<version>0.16.0</version>
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</dependency>
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<dependency>
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<groupId>io.prometheus</groupId>
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<artifactId>prometheus-metrics-simpleclient-bridge</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>io.prometheus</groupId>
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<artifactId>prometheus-metrics-exporter-httpserver</artifactId>
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<version>${project.version}</version>
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</dependency>
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</dependencies>
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<build>
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<finalName>${project.artifactId}</finalName>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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<configuration>
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<transformers>
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<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
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<mainClass>io.prometheus.metrics.examples.simpleclient.Main</mainClass>
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</transformer>
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</transformers>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>

‎examples/example-simpleclient-bridge/src/main/java/io/prometheus/metrics/examples/simpleclient/Main.java‎

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package io.prometheus.metrics.examples.simpleclient;
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import io.prometheus.client.Counter;
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import io.prometheus.metrics.exporter.httpserver.HTTPServer;
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import io.prometheus.metrics.simpleclient.bridge.SimpleclientCollector;
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import java.io.IOException;
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/**
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* Simple example of the simpleclient backwards compatibility module.
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*/
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public class Main {
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public static void main(String[] args) throws IOException, InterruptedException {
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// The following call will register all metrics from the old CollectorRegistry.defaultRegistry
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// with the new PrometheusRegistry.defaultRegistry.
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SimpleclientCollector.newBuilder().register();
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// Register a counter with the old CollectorRegistry.
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// It doesn't matter whether the counter is registered before or after bridging with PrometheusRegistry.
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Counter simpleclientCounter = Counter.build()
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.name("events_total")
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.help("total number of events")
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.register();
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simpleclientCounter.inc();
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// Expose metrics from the new PrometheusRegistry. This should contain the events_total metric.
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HTTPServer server = HTTPServer.newBuilder()
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.withPort(9400)
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.buildAndStart();
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System.out.println("HTTPServer listening on port http://localhost:" + server.getPort() + "/metrics");
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Thread.currentThread().join();
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}
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}

‎examples/pom.xml‎

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<module>example-exporter-servlet-tomcat</module>
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<module>example-exporter-httpserver</module>
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<module>example-exporter-opentelemetry</module>
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<module>example-simpleclient-bridge</module>
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</modules>
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</project>

‎pom.xml‎

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<module>prometheus-metrics-exporter-httpserver</module>
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<module>prometheus-metrics-exporter-opentelemetry</module>
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<module>prometheus-metrics-instrumentation-jvm</module>
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<module>prometheus-metrics-simpleclient-bridge</module>
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<!-- <module>prometheus-metrics-shaded-dependencies</module> -->
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<module>examples</module>
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<module>integration-tests</module>

‎prometheus-metrics-exposition-formats/src/test/java/io/prometheus/metrics/expositionformats/ExpositionFormatsTest.java‎

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"response_size_bytes_count{status=\"200\"} 3 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_sum{status=\"200\"} 4.1 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_created{status=\"200\"} " + createdTimestamp1s + " " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"0.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"1.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"2.2\"} 5 " + scrapeTimestamp2s + " # " + exemplar1String + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"+Inf\"} 5 " + scrapeTimestamp2s + " # " + exemplar2String + "\n" +
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"response_size_bytes_count{status=\"500\"} 5 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"200\",le=\"+Inf\"} 3 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_count{status=\"200\"} 3 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_sum{status=\"200\"} 4.1 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"0.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"1.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"2.2\"} 5 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"+Inf\"} 5 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_count{status=\"500\"} 5 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"200\",le=\"+Inf\"} 3 " + scrapeTimestamp1s + " # " + exemplar2String + "\n" +
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"response_size_bytes_count{status=\"200\"} 3 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_sum{status=\"200\"} 4.1 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"0.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"1.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"2.2\"} 5 " + scrapeTimestamp2s + " # " + exemplar1String + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"+Inf\"} 5 " + scrapeTimestamp2s + " # " + exemplar2String + "\n" +
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"response_size_bytes_count{status=\"500\"} 5 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"200\",le=\"+Inf\"} 3 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_count{status=\"200\"} 3 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_sum{status=\"200\"} 4.1 " + scrapeTimestamp1s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"0.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"1.0\"} 3 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"2.2\"} 5 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_bucket{status=\"500\",le=\"+Inf\"} 5 " + scrapeTimestamp2s + "\n" +
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"response_size_bytes_count{status=\"500\"} 5 " + scrapeTimestamp2s + "\n" +
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"sample_sum: 3.2 " +
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"bucket { " +
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"cumulative_count: 3 " +
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"upper_bound: 0.0 " +
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"upper_bound: 1.0 " +
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"} bucket { " +
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"cumulative_count: 5 " +
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"upper_bound: 2.2 " +
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.addDataPoint(HistogramSnapshot.HistogramDataPointSnapshot.newBuilder()
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.withSum(3.2)
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.withClassicHistogramBuckets(ClassicHistogramBuckets.newBuilder()
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.addBucket(0.0, 3)
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.addBucket(1.0, 3)
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.addBucket(2.2, 2)
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.addBucket(Double.POSITIVE_INFINITY, 0)
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.build())

‎prometheus-metrics-model/src/main/java/io/prometheus/metrics/model/snapshots/Unit.java‎

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return nanos / 1E9;
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}
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public static double millisToSeconds(long nanos) {
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return nanos / 1E3;
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public static double millisToSeconds(long millis) {
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return millis / 1E3;
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}
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public static double secondsToMillis(double seconds) {
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return seconds * 1E3;
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}
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public static double kiloBytesToBytes(double kilobytes) {

‎prometheus-metrics-simpleclient-bridge/pom.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<parent>
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<groupId>io.prometheus</groupId>
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<artifactId>client_java</artifactId>
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<version>1.0.0-alpha-5-SNAPSHOT</version>
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</parent>
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<artifactId>prometheus-metrics-simpleclient-bridge</artifactId>
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<packaging>bundle</packaging>
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<name>Prometheus Metrics - Simpleclient Bridge</name>
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<description>
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Bridge the old simpleclient CollectorRegistry to the new PrometheusRegistry
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</description>
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<licenses>
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<license>
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<name>The Apache Software License, Version 2.0</name>
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<url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
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<distribution>repo</distribution>
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</license>
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</licenses>
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<developers>
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<developer>
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<id>fstab</id>
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<name>Fabian Stäber</name>
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<email>fabian@fstab.de</email>
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</developer>
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</developers>
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<dependencies>
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<dependency>
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<groupId>io.prometheus</groupId>
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<artifactId>prometheus-metrics-model</artifactId>
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<version>${project.version}</version>
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</dependency>
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<dependency>
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<groupId>io.prometheus</groupId>
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<artifactId>simpleclient</artifactId>
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<version>0.16.0</version>
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<scope>provided</scope><!-- provided so that this can be used with older simpleclient versions -->
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</dependency>
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<!-- test dependencies -->
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.13.2</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>io.prometheus</groupId>
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<artifactId>prometheus-metrics-exposition-formats</artifactId>
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<version>${project.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>io.prometheus</groupId>
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<artifactId>simpleclient_common</artifactId>
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<version>0.16.0</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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</project>

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