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Add OtelUtil to support OpenTelemetry creation
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trace/otel/src/main/java/org/commonjava/o11yphant/otel/OtelUtil.java
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| /** | ||
| * Copyright (C) 2020 Red Hat, Inc. ([email protected]) | ||
| * | ||
| * 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 org.commonjava.o11yphant.otel; | ||
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|
||
| import io.opentelemetry.api.GlobalOpenTelemetry; | ||
| import io.opentelemetry.api.OpenTelemetry; | ||
| import io.opentelemetry.api.common.Attributes; | ||
| import io.opentelemetry.api.common.AttributesBuilder; | ||
| import io.opentelemetry.api.trace.propagation.W3CTraceContextPropagator; | ||
| import io.opentelemetry.context.propagation.ContextPropagators; | ||
| import io.opentelemetry.exporter.logging.LoggingSpanExporter; | ||
| import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporter; | ||
| import io.opentelemetry.exporter.otlp.trace.OtlpGrpcSpanExporterBuilder; | ||
| import io.opentelemetry.sdk.OpenTelemetrySdk; | ||
| import io.opentelemetry.sdk.resources.Resource; | ||
| import io.opentelemetry.sdk.trace.SdkTracerProvider; | ||
| import io.opentelemetry.sdk.trace.SdkTracerProviderBuilder; | ||
| import io.opentelemetry.sdk.trace.SpanProcessor; | ||
| import io.opentelemetry.sdk.trace.export.BatchSpanProcessor; | ||
| import io.opentelemetry.sdk.trace.export.SpanExporter; | ||
| import org.commonjava.o11yphant.trace.TracerConfiguration; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
|
|
||
| public class OtelUtil | ||
| { | ||
| private final static Logger logger = LoggerFactory.getLogger( OtelUtil.class ); | ||
|
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| public static OpenTelemetry getOpenTelemetry( TracerConfiguration traceConfiguration, OtelConfiguration otelConfig, | ||
| SpanExporter... exporters ) | ||
| { | ||
| logger.debug( "Trace enabled with Otel trace plugin." ); | ||
| SpanExporter[] spanExporters = exporters; | ||
| //FIXME: This needs to be more exposed to configuration options, especially for endpoint and exporter formats. | ||
| if ( exporters == null || exporters.length < 1 ) | ||
| { | ||
| final String grpcEndpoint = otelConfig.getGrpcEndpointUri(); | ||
| logger.info( "Trace grpc endpoint is configured as: {}", grpcEndpoint ); | ||
| List<SpanExporter> exp = new ArrayList<>(); | ||
| if ( traceConfiguration.isConsoleTransport() ) | ||
| { | ||
| exp.add( LoggingSpanExporter.create() ); | ||
| } | ||
|
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| OtlpGrpcSpanExporterBuilder grpcExporterBuilder = OtlpGrpcSpanExporter.builder(); | ||
| grpcExporterBuilder.setEndpoint( grpcEndpoint ); | ||
| Map<String, String> exporterHeaders = otelConfig.getGrpcHeaders(); | ||
| if ( exporterHeaders != null ) | ||
| { | ||
| exporterHeaders.forEach( grpcExporterBuilder::addHeader ); | ||
| } | ||
|
|
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| grpcExporterBuilder.build(); | ||
| exp.add( grpcExporterBuilder.build() ); | ||
|
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| spanExporters = exp.toArray( new SpanExporter[] {} ); | ||
| } | ||
|
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| SpanProcessor processor = BatchSpanProcessor.builder( SpanExporter.composite( spanExporters ) ).build(); | ||
|
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| SdkTracerProviderBuilder tracerProviderBuilder = SdkTracerProvider.builder().addSpanProcessor( processor ); | ||
|
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| Map<String, String> otelResources = otelConfig.getResources(); | ||
| if ( otelResources != null && !otelResources.isEmpty() ) | ||
| { | ||
| logger.debug( "Additional Trace Attributes for OTEL: {}", otelResources ); | ||
| AttributesBuilder builder = Attributes.builder(); | ||
| otelResources.forEach( builder::put ); | ||
| Resource resource = Resource.getDefault().merge( Resource.create( builder.build() ) ); | ||
| tracerProviderBuilder.setResource( resource ); | ||
| } | ||
|
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| SdkTracerProvider tracerProvider = tracerProviderBuilder.build(); | ||
|
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| OpenTelemetry otel; | ||
| try | ||
| { | ||
| otel = OpenTelemetrySdk.builder() | ||
| .setTracerProvider( tracerProvider ) | ||
| .setPropagators( | ||
| ContextPropagators.create( W3CTraceContextPropagator.getInstance() ) ) | ||
| .build(); | ||
| logger.debug( "The OpenTelemetry instance has been setup successfully." ); | ||
| } | ||
| catch ( IllegalStateException e ) | ||
| { | ||
| logger.warn( "The OpenTelemetry instance has not been setup successfully, will use a global one. Error: {}", | ||
| e.getMessage() ); | ||
| otel = GlobalOpenTelemetry.get(); | ||
| } | ||
| return otel; | ||
| } | ||
|
|
||
| } |
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