| /* |
| * 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.ignite.examples.opencensus; |
| |
| import java.awt.Desktop; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import io.opencensus.exporter.stats.prometheus.PrometheusStatsCollector; |
| import io.prometheus.client.exporter.HTTPServer; |
| import org.apache.commons.io.IOUtils; |
| import org.apache.ignite.Ignite; |
| import org.apache.ignite.IgniteCache; |
| import org.apache.ignite.Ignition; |
| import org.apache.ignite.configuration.IgniteConfiguration; |
| import org.apache.ignite.spi.metric.opencensus.OpenCensusMetricExporterSpi; |
| |
| /** |
| * This example demonstrates usage of the `ignite-opencensus` integration module. |
| */ |
| public class OpenCensusMetricsExporterExample { |
| /** Host name. */ |
| private static final String HOST = "localhost"; |
| |
| /** Port. */ |
| private static final int PORT = 8080; |
| |
| /** URL for the metrics. */ |
| private static final String METRICS_URL = "http://" + HOST + ":" + PORT; |
| |
| /** Export period. */ |
| private static final long PERIOD = 1_000L; |
| |
| /** |
| * @param args Command line arguments. |
| */ |
| public static void main(String[] args) throws Exception { |
| // Setting up prometheus stats collector. |
| PrometheusStatsCollector.createAndRegister(); |
| |
| // Setting up HTTP server that would serve http://localhost:8080 requests. |
| HTTPServer srv = new HTTPServer(HOST, PORT, true); |
| |
| IgniteConfiguration cfg = new IgniteConfiguration(); |
| |
| // Setting up OpenCensus exporter. |
| OpenCensusMetricExporterSpi openCensusMetricExporterSpi = new OpenCensusMetricExporterSpi(); |
| |
| // Metrics written to the collector each 1 second. |
| openCensusMetricExporterSpi.setPeriod(PERIOD); |
| |
| cfg.setMetricExporterSpi(openCensusMetricExporterSpi); |
| |
| try (Ignite ignite = Ignition.start(cfg)) { |
| // Creating cache. |
| IgniteCache<Integer, Integer> cache = ignite.createCache("my-cache"); |
| |
| // Putting some data to the cache. |
| for (int i = 0; i < 100; i++) |
| cache.put(i, i); |
| |
| // Sleeping for 2 sec to make sure data exported to the prometheus. |
| Thread.sleep(2 * PERIOD); |
| |
| // If desktop supported opens up page with the metrics. |
| if (Desktop.isDesktopSupported()) { |
| Desktop desktop = Desktop.getDesktop(); |
| |
| try { |
| desktop.browse(new URI(METRICS_URL)); |
| |
| Thread.sleep(2 * PERIOD); |
| } |
| catch (IOException | URISyntaxException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| else { |
| // In case desktop disabled printing URL content. |
| URLConnection conn = new URL(METRICS_URL).openConnection(); |
| |
| try (InputStream in = conn.getInputStream()) { |
| String content = IOUtils.toString(in, conn.getContentEncoding()); |
| |
| System.out.println(content); |
| } |
| } |
| } |
| } |
| } |