├── .gitignore ├── LICENSE ├── README.md ├── java_dropwizard ├── README.md ├── pom.xml └── src │ └── main │ └── java │ └── io │ └── robustperception │ └── java_examples │ └── JavaDropwizard.java ├── java_graphite_bridge ├── README.md ├── pom.xml └── src │ └── main │ └── java │ └── io │ └── robustperception │ └── java_examples │ └── JavaGraphiteBridge.java ├── java_httpserver ├── pom.xml └── src │ └── main │ └── java │ └── io │ └── robustperception │ └── java_examples │ └── JavaExample.java └── java_simple ├── README.md ├── pom.xml └── src └── main └── java └── io └── robustperception └── java_examples └── JavaSimple.java /.gitignore: -------------------------------------------------------------------------------- 1 | *.class 2 | *.swp 3 | 4 | # Package Files # 5 | *.jar 6 | *.war 7 | *.ear 8 | 9 | .idea 10 | *.iml 11 | 12 | target/ 13 | 14 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright {yyyy} {name of copyright owner} 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | 203 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Java examples for Prometheus 2 | 3 | These are examples used in [blog posts](http://www.robustperception.io/blog/). 4 | -------------------------------------------------------------------------------- /java_dropwizard/README.md: -------------------------------------------------------------------------------- 1 | # Dropwizard Prometheus Java Example 2 | 3 | This is a simple example of how to expose existing Dropwizard 4 | metrics with the Prometheus Java client. 5 | 6 | -------------------------------------------------------------------------------- /java_dropwizard/pom.xml: -------------------------------------------------------------------------------- 1 | 3 | 4.0.0 4 | io.robustperception.java_examples 5 | java_dropwizard 6 | jar 7 | 1.0-SNAPSHOT 8 | java_dropwizard 9 | http://maven.apache.org 10 | 11 | 12 | io.prometheus 13 | simpleclient 14 | 0.0.23 15 | 16 | 17 | io.prometheus 18 | simpleclient_hotspot 19 | 0.0.23 20 | 21 | 22 | io.prometheus 23 | simpleclient_servlet 24 | 0.0.23 25 | 26 | 27 | io.prometheus 28 | simpleclient_dropwizard 29 | 0.0.23 30 | 31 | 32 | io.dropwizard.metrics 33 | metrics-core 34 | 3.1.0 35 | 36 | 37 | org.eclipse.jetty 38 | jetty-servlet 39 | 8.1.7.v20120910 40 | 41 | 42 | 43 | 44 | 45 | 46 | org.apache.maven.plugins 47 | maven-compiler-plugin 48 | 3.1 49 | 50 | 1.5 51 | 1.5 52 | 53 | 54 | 55 | 56 | maven-assembly-plugin 57 | 58 | 59 | 60 | io.robustperception.java_examples.JavaDropwizard 61 | 62 | 63 | 64 | jar-with-dependencies 65 | 66 | 67 | 68 | 69 | make-assembly 70 | package 71 | 72 | single 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | -------------------------------------------------------------------------------- /java_dropwizard/src/main/java/io/robustperception/java_examples/JavaDropwizard.java: -------------------------------------------------------------------------------- 1 | package io.robustperception.java_examples; 2 | 3 | import com.codahale.metrics.Counter; 4 | import com.codahale.metrics.MetricRegistry; 5 | import io.prometheus.client.CollectorRegistry; 6 | import io.prometheus.client.dropwizard.DropwizardExports; 7 | 8 | import io.prometheus.client.exporter.MetricsServlet; 9 | import io.prometheus.client.hotspot.DefaultExports; 10 | import org.eclipse.jetty.server.Server; 11 | import org.eclipse.jetty.servlet.ServletContextHandler; 12 | import org.eclipse.jetty.servlet.ServletHolder; 13 | 14 | 15 | public class JavaDropwizard { 16 | // Create registry for Dropwizard metrics. 17 | static final MetricRegistry metrics = new MetricRegistry(); 18 | // Create a Dropwizard counter. 19 | static final Counter counter = metrics.counter("my_example_counter_total"); 20 | 21 | public static void main( String[] args ) throws Exception { 22 | // Increment the counter. 23 | counter.inc(); 24 | 25 | // Hook the Dropwizard registry into the Prometheus registry 26 | // via the DropwizardExports collector. 27 | CollectorRegistry.defaultRegistry.register(new DropwizardExports(metrics)); 28 | 29 | 30 | // Expose Prometheus metrics. 31 | Server server = new Server(1234); 32 | ServletContextHandler context = new ServletContextHandler(); 33 | context.setContextPath("/"); 34 | server.setHandler(context); 35 | context.addServlet(new ServletHolder(new MetricsServlet()), "/metrics"); 36 | // Add metrics about CPU, JVM memory etc. 37 | DefaultExports.initialize(); 38 | // Start the webserver. 39 | server.start(); 40 | server.join(); 41 | } 42 | } 43 | -------------------------------------------------------------------------------- /java_graphite_bridge/README.md: -------------------------------------------------------------------------------- 1 | # Prometheus Java Graphite Bridge Example 2 | 3 | This is a simple example of how to export to Graphite with the Java client. 4 | 5 | For more information see https://www.robustperception.io/exporting-to-graphite-with-the-prometheus-java-client 6 | -------------------------------------------------------------------------------- /java_graphite_bridge/pom.xml: -------------------------------------------------------------------------------- 1 | 3 | 4.0.0 4 | io.robustperception.java_examples 5 | java_graphite_bridge 6 | jar 7 | 1.0-SNAPSHOT 8 | java_simple 9 | http://maven.apache.org 10 | 11 | 12 | io.prometheus 13 | simpleclient 14 | 0.0.13 15 | 16 | 17 | io.prometheus 18 | simpleclient_hotspot 19 | 0.0.13 20 | 21 | 22 | io.prometheus 23 | simpleclient_graphite_bridge 24 | 0.0.13 25 | 26 | 27 | 28 | 29 | 30 | 31 | org.apache.maven.plugins 32 | maven-compiler-plugin 33 | 3.1 34 | 35 | 1.5 36 | 1.5 37 | 38 | 39 | 40 | 41 | maven-assembly-plugin 42 | 43 | 44 | 45 | io.robustperception.java_examples.JavaGraphiteBridge 46 | 47 | 48 | 49 | jar-with-dependencies 50 | 51 | 52 | 53 | 54 | make-assembly 55 | package 56 | 57 | single 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | -------------------------------------------------------------------------------- /java_graphite_bridge/src/main/java/io/robustperception/java_examples/JavaGraphiteBridge.java: -------------------------------------------------------------------------------- 1 | package io.robustperception.java_examples; 2 | 3 | import io.prometheus.client.CollectorRegistry; 4 | import io.prometheus.client.bridge.Graphite; 5 | import io.prometheus.client.hotspot.DefaultExports; 6 | 7 | public class JavaGraphiteBridge { 8 | public static void main(String[] args) throws Exception { 9 | // Add metrics about CPU, JVM memory etc. 10 | DefaultExports.initialize(); 11 | 12 | Graphite g = new Graphite("localhost", 2003); 13 | // Send to graphite every 60s. 14 | Thread thread = g.start(CollectorRegistry.defaultRegistry, 60); 15 | thread.join(); // Waits forever. 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /java_httpserver/pom.xml: -------------------------------------------------------------------------------- 1 | 3 | 4.0.0 4 | io.robustperception.java_examples 5 | java_httpserver 6 | jar 7 | 1.0-SNAPSHOT 8 | java_httpserver 9 | http://maven.apache.org 10 | 11 | 12 | io.prometheus 13 | simpleclient 14 | 0.10.0 15 | 16 | 17 | io.prometheus 18 | simpleclient_hotspot 19 | 0.10.0 20 | 21 | 22 | io.prometheus 23 | simpleclient_httpserver 24 | 0.10.0 25 | 26 | 27 | 28 | 29 | 30 | 31 | org.apache.maven.plugins 32 | maven-compiler-plugin 33 | 3.1 34 | 35 | 1.5 36 | 1.5 37 | 38 | 39 | 40 | 41 | maven-assembly-plugin 42 | 43 | 44 | 45 | io.robustperception.java_examples.JavaExample 46 | 47 | 48 | 49 | jar-with-dependencies 50 | 51 | 52 | 53 | 54 | make-assembly 55 | package 56 | 57 | single 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | -------------------------------------------------------------------------------- /java_httpserver/src/main/java/io/robustperception/java_examples/JavaExample.java: -------------------------------------------------------------------------------- 1 | 2 | 3 | package io.robustperception.java_examples; 4 | 5 | import io.prometheus.client.Counter; 6 | import io.prometheus.client.hotspot.DefaultExports; 7 | import io.prometheus.client.exporter.HTTPServer; 8 | 9 | public class JavaExample { 10 | static final Counter functionCounter = Counter.build() 11 | .name("my_function_calls_total") 12 | .help("Number of times my_function was called").register(); 13 | 14 | static void myFunction() { 15 | functionCounter.inc(); 16 | } 17 | 18 | public static void main(String[] args) throws Exception { 19 | DefaultExports.initialize(); 20 | HTTPServer server = new HTTPServer(8000); 21 | while (true) { 22 | myFunction(); 23 | Thread.sleep(1000); 24 | } 25 | } 26 | } 27 | 28 | -------------------------------------------------------------------------------- /java_simple/README.md: -------------------------------------------------------------------------------- 1 | # Simple Prometheus Java Example 2 | 3 | This is a simple example of how to export a Counter with Prometheus. 4 | 5 | For more information see http://www.robustperception.io/instrumenting-java-with-prometheus/ 6 | -------------------------------------------------------------------------------- /java_simple/pom.xml: -------------------------------------------------------------------------------- 1 | 3 | 4.0.0 4 | io.robustperception.java_examples 5 | java_simple 6 | jar 7 | 1.0-SNAPSHOT 8 | java_simple 9 | http://maven.apache.org 10 | 11 | 12 | io.prometheus 13 | simpleclient 14 | 0.6.0 15 | 16 | 17 | io.prometheus 18 | simpleclient_hotspot 19 | 0.6.0 20 | 21 | 22 | io.prometheus 23 | simpleclient_servlet 24 | 0.6.0 25 | 26 | 27 | org.eclipse.jetty 28 | jetty-servlet 29 | 9.4.15.v20190215 30 | 31 | 32 | 33 | 34 | 35 | 36 | org.apache.maven.plugins 37 | maven-compiler-plugin 38 | 3.1 39 | 40 | 1.8 41 | 1.8 42 | 43 | 44 | 45 | 46 | maven-assembly-plugin 47 | 48 | 49 | 50 | io.robustperception.java_examples.JavaSimple 51 | 52 | 53 | 54 | jar-with-dependencies 55 | 56 | 57 | 58 | 59 | make-assembly 60 | package 61 | 62 | single 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | -------------------------------------------------------------------------------- /java_simple/src/main/java/io/robustperception/java_examples/JavaSimple.java: -------------------------------------------------------------------------------- 1 | package io.robustperception.java_examples; 2 | 3 | import io.prometheus.client.Counter; 4 | import io.prometheus.client.exporter.MetricsServlet; 5 | import io.prometheus.client.hotspot.DefaultExports; 6 | import javax.servlet.ServletException; 7 | import javax.servlet.http.HttpServlet; 8 | import javax.servlet.http.HttpServletRequest; 9 | import javax.servlet.http.HttpServletResponse; 10 | import org.eclipse.jetty.server.Server; 11 | import org.eclipse.jetty.servlet.ServletContextHandler; 12 | import org.eclipse.jetty.servlet.ServletHolder; 13 | import java.io.IOException; 14 | 15 | 16 | public class JavaSimple { 17 | static class ExampleServlet extends HttpServlet { 18 | static final Counter requests = Counter.build() 19 | .name("hello_worlds_total") 20 | .help("Number of hello worlds served.").register(); 21 | 22 | @Override 23 | protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) 24 | throws ServletException, IOException { 25 | resp.getWriter().println("Hello World!"); 26 | // Increment the number of requests. 27 | requests.inc(); 28 | } 29 | } 30 | 31 | public static void main( String[] args ) throws Exception { 32 | Server server = new Server(1234); 33 | ServletContextHandler context = new ServletContextHandler(); 34 | context.setContextPath("/"); 35 | server.setHandler(context); 36 | // Expose our example servlet. 37 | context.addServlet(new ServletHolder(new ExampleServlet()), "/"); 38 | // Expose Promtheus metrics. 39 | context.addServlet(new ServletHolder(new MetricsServlet()), "/metrics"); 40 | // Add metrics about CPU, JVM memory etc. 41 | DefaultExports.initialize(); 42 | 43 | 44 | // Start the webserver. 45 | server.start(); 46 | server.join(); 47 | } 48 | } 49 | --------------------------------------------------------------------------------