1 /* 2 * Copyright 2019, OpenCensus Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package io.opencensus.examples.spring.servlet; 18 19 import io.opencensus.contrib.http.util.HttpViews; 20 import io.opencensus.exporter.stats.prometheus.PrometheusStatsCollector; 21 import io.opencensus.exporter.trace.logging.LoggingTraceExporter; 22 import io.opencensus.trace.Tracing; 23 import io.opencensus.trace.config.TraceConfig; 24 import io.opencensus.trace.samplers.Samplers; 25 import io.prometheus.client.exporter.HTTPServer; 26 import java.io.IOException; 27 import org.springframework.boot.SpringApplication; 28 import org.springframework.boot.autoconfigure.SpringBootApplication; 29 import org.springframework.context.ApplicationContext; 30 31 @SpringBootApplication 32 public class Application { 33 initStatsExporter()34 private static void initStatsExporter() throws IOException { 35 HttpViews.registerAllServerViews(); 36 HttpViews.registerAllClientViews(); 37 38 // Register Prometheus exporters and export metrics to a Prometheus HTTPServer. 39 // Refer to https://prometheus.io/ to run Prometheus Server. 40 PrometheusStatsCollector.createAndRegister(); 41 HTTPServer prometheusServer = new HTTPServer(9090, true); 42 } 43 initTracingAndLoggingExporter()44 private static void initTracingAndLoggingExporter() { 45 TraceConfig traceConfig = Tracing.getTraceConfig(); 46 traceConfig.updateActiveTraceParams( 47 traceConfig.getActiveTraceParams().toBuilder().setSampler(Samplers.alwaysSample()).build()); 48 49 LoggingTraceExporter.register(); 50 } 51 52 /** Main launcher for the SpringServletApplication. */ main(String[] args)53 public static void main(String[] args) throws IOException { 54 ApplicationContext ctx = SpringApplication.run(Application.class, args); 55 56 initTracingAndLoggingExporter(); 57 initStatsExporter(); 58 } 59 } 60