Added Spring Cloud Config server support; fixes 1915 (#1917)

spring-cloud-sleuth-instrumentation/src/main/java/org/springframework/cloud/sleuth/instrument/config/TraceEnvironmentRepositoryAspect.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013-2021 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.instrument.config;
+
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+
+import org.springframework.cloud.sleuth.Span;
+import org.springframework.cloud.sleuth.Tracer;
+
+/**
+ * Aspect wrapping resolution of properties.
+ *
+ * @author Marcin Grzejszczak
+ * @since 3.1.0
+ */
+@Aspect
+public class TraceEnvironmentRepositoryAspect {
+
+	private final Tracer tracer;
+
+	public TraceEnvironmentRepositoryAspect(Tracer tracer) {
+		this.tracer = tracer;
+	}
+
+	@Around("execution (* org.springframework.cloud.config.server.environment.EnvironmentRepository.*(..))")
+	public Object traceFindEnvironment(final ProceedingJoinPoint pjp) throws Throwable {
+		Span findOneSpan = this.tracer.nextSpan().name("find");
+		findOneSpan.tag("config.environment.class", pjp.getTarget().getClass().getName());
+		findOneSpan.tag("config.environment.method", pjp.getSignature().getName());
+		try (Tracer.SpanInScope ws = this.tracer.withSpan(findOneSpan.start())) {
+			return pjp.proceed();
+		}
+		finally {
+			findOneSpan.end();
+		}
+	}
+
+}