Replace Flapdoodle with Testcontainers for MongoDB support.

For more details on this usage of Testcontainers, see https://bsideup.github.io/posts/local_development_with_testcontainers/

Related issues: https://github.com/spring-projects/spring-boot/issues/30863

spring-session-samples/spring-session-sample-boot-mongodb-reactive/spring-session-sample-boot-mongodb-reactive.gradle

@@ -5,7 +5,7 @@ dependencies {
 	implementation  "org.springframework.boot:spring-boot-starter-webflux"
 	implementation  "org.springframework.boot:spring-boot-starter-thymeleaf"
 	implementation  "org.springframework.boot:spring-boot-starter-data-mongodb-reactive"
-	implementation  "de.flapdoodle.embed:de.flapdoodle.embed.mongo"
+    implementation  "org.testcontainers:mongodb"
 
 	testImplementation "org.springframework.boot:spring-boot-starter-test"
 	testImplementation "org.seleniumhq.selenium:htmlunit-driver"

spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoReactiveApplication.java

@@ -18,7 +18,16 @@ package org.springframework.session.mongodb.examples;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MapPropertySource;
 import org.springframework.session.data.mongo.config.annotation.web.reactive.EnableMongoWebSession;
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.utility.DockerImageName;
+
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * Pure Spring-based application (using Spring Boot for dependency management), hence no
@@ -31,8 +40,35 @@ import org.springframework.session.data.mongo.config.annotation.web.reactive.Ena
 @EnableMongoWebSession
 public class SpringSessionMongoReactiveApplication {
 
-	public static void main(String[] args) {
+	/**
-		SpringApplication.run(SpringSessionMongoReactiveApplication.class);
+	 * Use Testcontainers to managed MongoDB through Docker.
+	 * <p>
+	 * @see https://bsideup.github.io/posts/local_development_with_testcontainers/
+	 */
+	static class Initializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+		static MongoDBContainer mongo = new MongoDBContainer(DockerImageName.parse("mongo:5.0"));
+
+		public static Map<String, String> getProperties() {
+			mongo.start();
+
+			HashMap<String, String> properties = new HashMap<>();
+			properties.put("spring.data.mongodb.host", mongo.getHost());
+			properties.put("spring.data.mongodb.port", mongo.getFirstMappedPort() + "");
+			return properties;
 		}
 
+		@Override
+		public void initialize(ConfigurableApplicationContext context) {
+			ConfigurableEnvironment env = context.getEnvironment();
+			env.getPropertySources().addFirst(new MapPropertySource("testcontainers", (Map) getProperties()));
+		}
+	}
+
+
+	public static void main(String[] args) {
+		SpringApplication application = new SpringApplication(SpringSessionMongoReactiveApplication.class);
+		application.addInitializers(new Initializer());
+		application.run(args);
+	}
 }

spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/main/resources/application.properties

@@ -0,0 +1,2 @@
+logging.level.org.springframework.data.mongodb=DEBUG
+logging.level.org.springframework.session=DEBUG

spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/main/resources/application.yml

@@ -1,8 +0,0 @@
-logging:
-  level:
-    org.springframework.data.mongodb: DEBUG
-    org.springframework.session: DEBUG
-spring:
-  mongodb:
-    embedded:
-      version: 3.4.3

spring-session-samples/spring-session-sample-boot-mongodb-reactive/src/test/java/org/springframework/session/mongodb/examples/AttributeTests.java

@@ -16,21 +16,21 @@
 
 package org.springframework.session.mongodb.examples;
 
-import java.util.List;
-
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.htmlunit.HtmlUnitDriver;
-
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.web.server.LocalServerPort;
 import org.springframework.session.mongodb.examples.pages.HomePage;
 import org.springframework.session.mongodb.examples.pages.HomePage.Attribute;
+import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit.jupiter.SpringExtension;
 
+import java.util.List;
+
 import static org.assertj.core.api.Assertions.assertThat;
 
 /**
@@ -39,6 +39,7 @@ import static org.assertj.core.api.Assertions.assertThat;
  */
 @ExtendWith(SpringExtension.class)
 @SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@ContextConfiguration(initializers = SpringSessionMongoReactiveApplication.Initializer.class)
 public class AttributeTests {
 
 	@LocalServerPort

spring-session-samples/spring-session-sample-boot-mongodb-traditional/spring-session-sample-boot-mongodb-traditional.gradle

@@ -8,7 +8,8 @@ dependencies {
     implementation  "org.thymeleaf.extras:thymeleaf-extras-springsecurity6"
     implementation "org.springframework.boot:spring-boot-starter-data-mongodb"
     implementation "org.springframework.boot:spring-boot-starter-security"
-    implementation "de.flapdoodle.embed:de.flapdoodle.embed.mongo"
+    implementation "org.testcontainers:mongodb"
+
 
     testImplementation "org.springframework.boot:spring-boot-starter-test"
     testImplementation "org.seleniumhq.selenium:htmlunit-driver"

spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/main/java/org/springframework/session/mongodb/examples/EmbeddedMongoPortLogger.java

@@ -1,46 +0,0 @@
-/*
- * Copyright 2014-2016 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.session.mongodb.examples;
-
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
-import org.springframework.boot.ApplicationArguments;
-import org.springframework.boot.ApplicationRunner;
-import org.springframework.context.EnvironmentAware;
-import org.springframework.core.env.Environment;
-import org.springframework.stereotype.Component;
-
-@Component
-class EmbeddedMongoPortLogger implements ApplicationRunner, EnvironmentAware {
-
-	private static final Log logger = LogFactory.getLog(EmbeddedMongoPortLogger.class);
-
-	private Environment environment;
-
-	@Override
-	public void run(ApplicationArguments args) throws Exception {
-		String port = this.environment.getProperty("local.mongo.port");
-		logger.info("Embedded Mongo started on port " + port + ", use 'mongo --port " + port + "' command to connect");
-	}
-
-	@Override
-	public void setEnvironment(Environment environment) {
-		this.environment = environment;
-	}
-
-}

spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/main/java/org/springframework/session/mongodb/examples/SpringSessionMongoTraditionalBoot.java

@@ -18,6 +18,15 @@ package org.springframework.session.mongodb.examples;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.ApplicationContextInitializer;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.core.env.MapPropertySource;
+import org.testcontainers.containers.MongoDBContainer;
+import org.testcontainers.utility.DockerImageName;
+
+import java.util.HashMap;
+import java.util.Map;
 
 /**
  * @author Rob Winch
@@ -25,8 +34,34 @@ import org.springframework.boot.autoconfigure.SpringBootApplication;
 @SpringBootApplication
 public class SpringSessionMongoTraditionalBoot {
 
-	public static void main(String[] args) {
+	/**
-		SpringApplication.run(SpringSessionMongoTraditionalBoot.class, args);
+	 * Use Testcontainers to managed MongoDB through Docker.
+	 * <p>
+	 * @see https://bsideup.github.io/posts/local_development_with_testcontainers/
+	 */
+	static class Initializer implements ApplicationContextInitializer<ConfigurableApplicationContext> {
+
+		static MongoDBContainer mongo = new MongoDBContainer(DockerImageName.parse("mongo:5.0"));
+
+		public static Map<String, String> getProperties() {
+			mongo.start();
+
+			HashMap<String, String> properties = new HashMap<>();
+			properties.put("spring.data.mongodb.host", mongo.getHost());
+			properties.put("spring.data.mongodb.port", mongo.getFirstMappedPort() + "");
+			return properties;
 		}
 
+		@Override
+		public void initialize(ConfigurableApplicationContext context) {
+			ConfigurableEnvironment env = context.getEnvironment();
+			env.getPropertySources().addFirst(new MapPropertySource("testcontainers", (Map) getProperties()));
+		}
+	}
+
+	public static void main(String[] args) {
+		SpringApplication application = new SpringApplication(SpringSessionMongoTraditionalBoot.class);
+		application.addInitializers(new Initializer());
+		application.run(args);
+	}
 }

spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/main/resources/application.properties

@@ -1,4 +1,5 @@
 spring.thymeleaf.cache=false
 spring.template.cache=false
-spring.data.mongodb.port=0
+
-spring.mongodb.embedded.version=3.4.3
+logging.level.org.springframework.data.mongodb=DEBUG
+logging.level.org.springframework.session=DEBUG

spring-session-samples/spring-session-sample-boot-mongodb-traditional/src/test/java/org/springframework/session/mongodb/examples/BootTests.java

@@ -33,6 +33,7 @@ import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.boot.test.context.SpringBootTest.WebEnvironment;
 import org.springframework.session.mongodb.examples.pages.HomePage;
 import org.springframework.session.mongodb.examples.pages.LoginPage;
+import org.springframework.test.context.ContextConfiguration;
 import org.springframework.test.context.junit.jupiter.SpringExtension;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.htmlunit.webdriver.MockMvcHtmlUnitDriverBuilder;
@@ -45,6 +46,7 @@ import static org.assertj.core.api.Assertions.assertThat;
 @ExtendWith(SpringExtension.class)
 @AutoConfigureMockMvc
 @SpringBootTest(webEnvironment = WebEnvironment.MOCK)
+@ContextConfiguration(initializers = SpringSessionMongoTraditionalBoot.Initializer.class)
 public class BootTests {
 
 	@Autowired