Thermoweb bugfix/2246 handle invocation target exception (#2264)

* Fixes gh-2246 : handle InvocationTargetException properly

* Polished the solution + added tests

---------

Co-authored-by: romain.chauveau <romain.chauveau@praxedo.com>

spring-cloud-sleuth-instrumentation/src/main/java/org/springframework/cloud/sleuth/instrument/session/TraceSessionRepositoryAspect.java

@@ -79,7 +79,7 @@ private <T> Object callMethodOnWrappedObject(ProceedingJoinPoint pjp, T target)
 			if (log.isDebugEnabled()) {
 				log.debug("Found a corresponding method on the trace representation [" + method + "]");
 			}
-			return method.invoke(target, pjp.getArgs());
+			return ReflectionUtils.invokeMethod(method, target, pjp.getArgs());
 		}
 		if (log.isDebugEnabled()) {
 			log.debug("Method [" + pjp.getSignature().getName()
@@ -98,7 +98,7 @@ public Object wrapReactiveSessionRepository(ProceedingJoinPoint pjp) throws Thro
 		return callMethodOnWrappedObject(pjp, target);
 	}
 
-	private Method getMethod(ProceedingJoinPoint pjp, Object tracingWrapper) {
+	Method getMethod(ProceedingJoinPoint pjp, Object tracingWrapper) {
 		MethodSignature signature = (MethodSignature) pjp.getSignature();
 		Method method = signature.getMethod();
 		Method foundMethodOnTracingWrapper = ReflectionUtils.findMethod(tracingWrapper.getClass(), method.getName(),

spring-cloud-sleuth-instrumentation/src/test/java/org/springframework/cloud/sleuth/instrument/session/TraceSessionRepositoryAspectTests.java

@@ -0,0 +1,57 @@
+/*
+ * 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.session;
+
+import java.lang.reflect.Method;
+
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.assertj.core.api.BDDAssertions;
+import org.junit.jupiter.api.Test;
+
+import org.springframework.cloud.sleuth.tracer.SimpleTracer;
+import org.springframework.session.SessionRepository;
+
+import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.mock;
+
+class TraceSessionRepositoryAspectTests {
+
+	@Test
+	void should_throw_the_cause_of_the_session_exception() {
+		SimpleTracer simpleTracer = new SimpleTracer();
+		TraceSessionRepositoryAspect aspect = new TraceSessionRepositoryAspect(simpleTracer,
+				simpleTracer.currentTraceContext()) {
+			@Override
+			Method getMethod(ProceedingJoinPoint pjp, Object tracingWrapper) {
+				try {
+					return SessionRepository.class.getMethod("createSession");
+				}
+				catch (NoSuchMethodException e) {
+					throw new RuntimeException(e);
+				}
+			}
+		};
+		ProceedingJoinPoint pjp = mock(ProceedingJoinPoint.class);
+		SessionRepository sessionRepository = mock(SessionRepository.class);
+		given(pjp.getTarget()).willReturn(sessionRepository);
+		given(sessionRepository.createSession()).willThrow(new RuntimeException("Boom!"));
+
+		BDDAssertions.thenThrownBy(() -> aspect.wrapSessionRepository(pjp)).isInstanceOf(RuntimeException.class)
+				.hasMessageContaining("Boom!");
+	}
+
+}