JaegerTelemetryManager.java
/*
* Copyright (c) 2022, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
*
* WSO2 Inc. 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.
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package org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.management;
import io.opentelemetry.api.OpenTelemetry;
import io.opentelemetry.api.common.Attributes;
import io.opentelemetry.api.trace.Tracer;
import io.opentelemetry.context.propagation.ContextPropagators;
import io.opentelemetry.exporter.jaeger.JaegerGrpcSpanExporter;
import io.opentelemetry.extension.trace.propagation.JaegerPropagator;
import io.opentelemetry.sdk.OpenTelemetrySdk;
import io.opentelemetry.sdk.resources.Resource;
import io.opentelemetry.sdk.trace.SdkTracerProvider;
import io.opentelemetry.sdk.trace.export.BatchSpanProcessor;
import io.opentelemetry.semconv.resource.attributes.ResourceAttributes;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.management.handling.span.OpenTelemetrySpanHandler;
import org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.management.handling.span.SpanHandler;
import org.apache.synapse.aspects.flow.statistics.tracing.opentelemetry.management.scoping.TracingScopeManager;
import org.apache.synapse.config.SynapsePropertiesLoader;
import java.util.concurrent.TimeUnit;
public class JaegerTelemetryManager implements OpenTelemetryManager {
private Log logger = LogFactory.getLog(JaegerTelemetryManager.class);
private SdkTracerProvider sdkTracerProvider;
private OpenTelemetry openTelemetry;
private TelemetryTracer tracer;
private SpanHandler handler;
@Override
public void init() {
String endPointURL = SynapsePropertiesLoader.getPropertyValue(TelemetryConstants.OPENTELEMETRY_URL, null);
String endPointHost = SynapsePropertiesLoader.getPropertyValue(TelemetryConstants.OPENTELEMETRY_HOST,
TelemetryConstants.DEFAULT_JAEGER_HOST);
String endPointPort = SynapsePropertiesLoader.getPropertyValue(TelemetryConstants.OPENTELEMETRY_PORT,
TelemetryConstants.DEFAULT_JAEGER_PORT);
JaegerGrpcSpanExporter jaegerExporter;
if (endPointURL == null) {
String jaegerExporterEndpoint = String.format("http://%s:%s", endPointHost, endPointPort);
jaegerExporter = JaegerGrpcSpanExporter.builder().setEndpoint(jaegerExporterEndpoint).setTimeout(30,
TimeUnit.SECONDS).build();
} else {
if (endPointHost != null && endPointPort != null){
logger.info("Disregarding " + TelemetryConstants.OPENTELEMETRY_HOST + " and " +
TelemetryConstants.OPENTELEMETRY_PORT + ", and using the provided " +
TelemetryConstants.OPENTELEMETRY_CLASS);
}
jaegerExporter =
JaegerGrpcSpanExporter.builder().setEndpoint(endPointURL).setTimeout(30, TimeUnit.SECONDS)
.build();
}
if (logger.isDebugEnabled()) {
logger.debug("Jaeger exporter: " + jaegerExporter + " is configured");
}
Resource serviceNameResource = Resource.create(Attributes.of(ResourceAttributes.SERVICE_NAME,
TelemetryConstants.SERVICE_NAME));
sdkTracerProvider = SdkTracerProvider.builder()
.addSpanProcessor(BatchSpanProcessor.builder(jaegerExporter).build())
.setResource(Resource.getDefault().merge(serviceNameResource))
.build();
openTelemetry = OpenTelemetrySdk.builder()
.setTracerProvider(sdkTracerProvider)
.setPropagators(ContextPropagators.create(JaegerPropagator.getInstance()))
.build();
this.tracer = new TelemetryTracer(getTelemetryTracer());
if (logger.isDebugEnabled()) {
logger.debug("Tracer: " + this.tracer + " is configured");
}
this.handler = new SpanHandler(tracer, openTelemetry, new TracingScopeManager());
}
@Override
public Tracer getTelemetryTracer() {
return openTelemetry.getTracer(TelemetryConstants.OPENTELEMETRY_INSTRUMENTATION_NAME);
}
@Override
public void close() {
if (sdkTracerProvider != null) {
sdkTracerProvider.close();
}
}
@Override
public String getServiceName() {
return TelemetryConstants.SERVICE_NAME;
}
@Override
public OpenTelemetrySpanHandler getHandler() {
return this.handler;
}
}