Reactive mongo (#2044)

Added support for the new Reactive and Synchronous Context Providers in Mongo

tests/common/src/main/java/org/springframework/cloud/sleuth/instrument/mongodb/ReactiveMongoDbIntegrationTests.java

@@ -0,0 +1,171 @@
+/*
+ * 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.mongodb;
+
+import java.time.Duration;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+import org.testcontainers.utility.DockerImageName;
+import reactor.core.publisher.Mono;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cloud.sleuth.Span;
+import org.springframework.cloud.sleuth.TraceContext;
+import org.springframework.cloud.sleuth.Tracer;
+import org.springframework.cloud.sleuth.exporter.FinishedSpan;
+import org.springframework.cloud.sleuth.test.TestSpanHandler;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.repository.reactive.ReactiveCrudRepository;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.DynamicPropertyRegistry;
+import org.springframework.test.context.DynamicPropertySource;
+
+import static org.assertj.core.api.BDDAssertions.then;
+
+@ContextConfiguration(classes = ReactiveMongoDbIntegrationTests.TestConfig.class)
+@Testcontainers
+public abstract class ReactiveMongoDbIntegrationTests {
+
+	private static final Log log = LogFactory.getLog(ReactiveMongoDbIntegrationTests.class);
+
+	@Autowired
+	TestSpanHandler spans;
+
+	@Autowired
+	Tracer tracer;
+
+	@Autowired
+	BasicUserRepository basicUserRepository;
+
+	@Container
+	static MongoDBContainer mongoDBContainer = new MongoDBContainer(DockerImageName.parse("mongo").withTag("4.4.7"));
+
+	@DynamicPropertySource
+	static void setProperties(DynamicPropertyRegistry registry) {
+		mongoDBContainer.start();
+		registry.add("spring.data.mongodb.uri", mongoDBContainer::getReplicaSetUrl);
+	}
+
+	@BeforeEach
+	void setup() {
+		this.spans.clear();
+	}
+
+	@Test
+	public void should_pass_tracing_information_when_using_reactive_mongodb() {
+		// given
+		Span nextSpan = this.tracer.nextSpan().name("mongo-reactive-app");
+
+		// when
+		Mono.just(nextSpan).doOnNext(span -> this.tracer.withSpan(nextSpan.start())).flatMap(span -> {
+			log.info("Hello from flat map");
+			return this.basicUserRepository.save(new User("foo", "bar", "baz", null))
+					.flatMap(user -> this.basicUserRepository.findUserByUsername("foo"));
+		}).contextWrite(context -> context.put(Span.class, nextSpan).put(TraceContext.class, nextSpan.context()))
+				.doFinally(signalType -> nextSpan.end()).block(Duration.ofMinutes(1));
+
+		// then
+		List<FinishedSpan> reportedSpans = this.spans.reportedSpans();
+		then(reportedSpans.stream().map(FinishedSpan::getTraceId).collect(Collectors.toSet()))
+				.as("There must be only 1 trace id").hasSize(1);
+		List<String> mongoSpanNames = reportedSpans.stream()
+				.filter(fs -> fs.getName().equals("insert user") || fs.getName().equals("find user"))
+				.map(FinishedSpan::getName).collect(Collectors.toList());
+		then(mongoSpanNames).as("There must be first an insert then a find").containsExactly("insert user",
+				"find user");
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	@EnableAutoConfiguration
+	public static class TestConfig {
+
+	}
+
+}
+
+interface BasicUserRepository extends ReactiveCrudRepository<User, Long> {
+
+	Mono<User> findUserByUsername(String username);
+
+}
+
+class User {
+
+	private String id;
+
+	private String username;
+
+	private String firstname;
+
+	private String lastname;
+
+	User() {
+	}
+
+	User(String id) {
+		this.setId(id);
+	}
+
+	User(String username, String firstname, String lastname, String id) {
+		this.username = username;
+		this.firstname = firstname;
+		this.lastname = lastname;
+		this.id = id;
+	}
+
+	String getId() {
+		return this.id;
+	}
+
+	void setId(String id) {
+		this.id = id;
+	}
+
+	String getUsername() {
+		return this.username;
+	}
+
+	void setUsername(String username) {
+		this.username = username;
+	}
+
+	String getFirstname() {
+		return this.firstname;
+	}
+
+	void setFirstname(String firstname) {
+		this.firstname = firstname;
+	}
+
+	String getLastname() {
+		return this.lastname;
+	}
+
+	void setLastname(String lastname) {
+		this.lastname = lastname;
+	}
+
+}