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- /*
- * Copyright The OpenTelemetry Authors
- *
- * Licensed 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 io.opentelemetry.auto.tooling;
- import com.google.common.annotations.VisibleForTesting;
- import io.opentelemetry.auto.config.Config;
- import io.opentelemetry.auto.exportersupport.MetricExporterFactory;
- import io.opentelemetry.sdk.OpenTelemetrySdk;
- import io.opentelemetry.sdk.contrib.auto.config.SpanExporterFactory;
- import io.opentelemetry.sdk.metrics.export.IntervalMetricReader;
- import io.opentelemetry.sdk.metrics.export.MetricExporter;
- import io.opentelemetry.sdk.trace.export.SimpleSpansProcessor;
- import io.opentelemetry.sdk.trace.export.SpanExporter;
- import java.io.File;
- import java.net.MalformedURLException;
- import java.net.URL;
- import java.util.Collections;
- import java.util.Iterator;
- import java.util.ServiceLoader;
- import lombok.extern.slf4j.Slf4j;
- @Slf4j
- public class TracerInstaller {
- /** Register agent tracer if no agent tracer is already registered. */
- public static synchronized void installAgentTracer() {
- if (Config.get().isTraceEnabled()) {
- // Try to create an exporter
- final String exporterJar = Config.get().getExporterJar();
- if (exporterJar != null) {
- installExportersFromJar(exporterJar);
- } else {
- log.warn("No exporter is specified. Tracing will run but spans are dropped");
- }
- } else {
- log.info("Tracing is disabled.");
- }
- }
- @VisibleForTesting
- private static synchronized void installExportersFromJar(final String exporterJar) {
- final URL url;
- try {
- url = new File(exporterJar).toURI().toURL();
- } catch (final MalformedURLException e) {
- log.warn("Filename could not be parsed: " + exporterJar + ". Exporter is not installed");
- log.warn("No valid exporter found. Tracing will run but spans are dropped");
- return;
- }
- final DefaultExporterConfig config = new DefaultExporterConfig("exporter");
- final ExporterClassLoader exporterLoader =
- new ExporterClassLoader(new URL[] {url}, TracerInstaller.class.getClassLoader());
- final SpanExporterFactory spanExporterFactory =
- getExporterFactory(SpanExporterFactory.class, exporterLoader);
- if (spanExporterFactory != null) {
- final SpanExporter spanExporter = spanExporterFactory.fromConfig(config);
- OpenTelemetrySdk.getTracerProvider()
- .addSpanProcessor(SimpleSpansProcessor.create(spanExporter));
- log.info("Installed span exporter: " + spanExporter.getClass().getName());
- } else {
- log.warn("No matching providers in jar " + exporterJar);
- log.warn("No valid exporter found. Tracing will run but spans are dropped");
- }
- final MetricExporterFactory metricExporterFactory =
- getExporterFactory(MetricExporterFactory.class, exporterLoader);
- if (metricExporterFactory != null) {
- final MetricExporter metricExporter = metricExporterFactory.fromConfig(config);
- IntervalMetricReader.builder()
- .setMetricExporter(metricExporter)
- .setMetricProducers(
- Collections.singleton(OpenTelemetrySdk.getMeterProvider().getMetricProducer()))
- .build();
- log.info("Installed metric exporter: " + metricExporter.getClass().getName());
- }
- }
- private static <F> F getExporterFactory(
- final Class<F> service, final ExporterClassLoader exporterLoader) {
- final ServiceLoader<F> serviceLoader = ServiceLoader.load(service, exporterLoader);
- final Iterator<F> i = serviceLoader.iterator();
- if (i.hasNext()) {
- final F factory = i.next();
- if (i.hasNext()) {
- log.warn(
- "Exporter JAR defines more than one {}. Only the first one found will be used",
- service.getName());
- }
- return factory;
- }
- return null;
- }
- public static void logVersionInfo() {
- VersionLogger.logAllVersions();
- log.debug(
- AgentInstaller.class.getName() + " loaded on " + AgentInstaller.class.getClassLoader());
- }
- }
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