Revert "Removed Wavefront support"

This reverts commit 5a46936.

Author: marcingrzejszczak

pom.xml

@@ -70,6 +70,7 @@
 		<opentelemetry.version>1.2.0</opentelemetry.version>
 		<opentelemetry.alpha.version>1.2.0-alpha</opentelemetry.alpha.version>
 		<opentelemetry-instrumentation.version>1.1.0-alpha</opentelemetry-instrumentation.version>
+		<wavefront.version>2.2.0-SNAPSHOT</wavefront.version>
 		<spring-security-boot-autoconfigure.version>2.3.4.RELEASE</spring-security-boot-autoconfigure.version>
 		<disable.nohttp.checks>false</disable.nohttp.checks>
 		<okhttp.version>4.9.0</okhttp.version>
@@ -302,6 +303,13 @@
 				<artifactId>jsr305</artifactId>
 				<version>${jsr305.version}</version>
 			</dependency>
+			<dependency>
+				<groupId>com.wavefront</groupId>
+				<artifactId>wavefront-spring-boot-bom</artifactId>
+				<version>${wavefront.version}</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
 		</dependencies>
 	</dependencyManagement>
 

spring-cloud-sleuth-otel-autoconfigure/pom.xml

@@ -50,6 +50,11 @@
 			<artifactId>spring-boot-configuration-processor</artifactId>
 			<optional>true</optional>
 		</dependency>
+		<dependency>
+			<groupId>com.wavefront</groupId>
+			<artifactId>wavefront-spring-boot</artifactId>
+			<optional>true</optional>
+		</dependency>
 
 		<dependency>
 			<groupId>javax.jms</groupId>

spring-cloud-sleuth-otel-autoconfigure/src/main/java/org/springframework/cloud/sleuth/autoconfig/otel/wavefront/WavefrontOtelAutoConfiguration.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2013-2020 the original author or 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
+ *
+ *      https://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.springframework.cloud.sleuth.autoconfig.otel.wavefront;
+
+import java.util.Collection;
+
+import com.wavefront.spring.autoconfigure.WavefrontAutoConfiguration;
+import com.wavefront.spring.autoconfigure.WavefrontSleuthSpanHandler;
+import io.opentelemetry.sdk.common.CompletableResultCode;
+import io.opentelemetry.sdk.trace.data.SpanData;
+import io.opentelemetry.sdk.trace.export.SpanExporter;
+
+import org.springframework.boot.autoconfigure.AutoConfigureAfter;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.cloud.sleuth.TraceContext;
+import org.springframework.cloud.sleuth.otel.bridge.OtelFinishedSpan;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * {@link org.springframework.boot.autoconfigure.EnableAutoConfiguration}
+ * Auto-configuration enables reporting to Wavefront.
+ *
+ * @author Marcin Grzejszczak
+ * @since 1.0.0
+ */
+@Configuration(proxyBeanMethods = false)
+@ConditionalOnProperty(value = { "spring.sleuth.enabled", "spring.sleuth.wavefront.enabled" }, matchIfMissing = true)
+@ConditionalOnClass(WavefrontSleuthSpanHandler.class)
+@AutoConfigureAfter(WavefrontAutoConfiguration.class)
+public class WavefrontOtelAutoConfiguration {
+
+	@Bean
+	@ConditionalOnBean(WavefrontSleuthSpanHandler.class)
+	SpanExporter wavefrontSpanExporter(WavefrontSleuthSpanHandler spanHandler) {
+		return new SpanExporter() {
+			@Override
+			public CompletableResultCode export(Collection<SpanData> spans) {
+				spans.forEach(spanData -> spanHandler.end(traceContext(spanData), OtelFinishedSpan.fromOtel(spanData)));
+				return CompletableResultCode.ofSuccess();
+			}
+
+			private TraceContext traceContext(SpanData spanData) {
+				return new TraceContext() {
+					@Override
+					public String traceId() {
+						return spanData.getTraceId();
+					}
+
+					@Override
+					public String parentId() {
+						return spanData.getParentSpanId();
+					}
+
+					@Override
+					public String spanId() {
+						return spanData.getSpanId();
+					}
+
+					@Override
+					public Boolean sampled() {
+						return spanData.getSpanContext().isSampled();
+					}
+				};
+			}
+
+			@Override
+			public CompletableResultCode flush() {
+				return CompletableResultCode.ofSuccess();
+			}
+
+			@Override
+			public CompletableResultCode shutdown() {
+				spanHandler.close();
+				return CompletableResultCode.ofSuccess();
+			}
+		};
+	}
+
+}

spring-cloud-sleuth-otel-autoconfigure/src/main/resources/META-INF/spring.factories

@@ -3,4 +3,5 @@ org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
 org.springframework.cloud.sleuth.autoconfig.otel.OtelAutoConfiguration,\
 org.springframework.cloud.sleuth.autoconfig.otel.MultipleTracerAutoConfigurationsDetector,\
 org.springframework.cloud.sleuth.autoconfig.otel.instrument.opentracing.OtelOpentracingAutoConfiguration,\
-org.springframework.cloud.sleuth.autoconfig.otel.zipkin2.ZipkinOtelAutoConfiguration
+org.springframework.cloud.sleuth.autoconfig.otel.zipkin2.ZipkinOtelAutoConfiguration,\
+org.springframework.cloud.sleuth.autoconfig.otel.wavefront.WavefrontOtelAutoConfiguration