Use Flapdoodle Embedded MongoDB for integration tests and samples

samples/mongo/src/main/java/sample/EmbeddedMongoPortLogger.java

@@ -0,0 +1,44 @@
+/*
+ * 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
+ *
+ *      http://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 sample;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+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 Logger logger = LoggerFactory.getLogger(EmbeddedMongoPortLogger.class);
+
+	private Environment environment;
+
+	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");
+	}
+
+	public void setEnvironment(Environment environment) {
+		this.environment = environment;
+	}
+
+}

samples/mongo/src/main/resources/application.properties

@@ -1,2 +1,3 @@
 spring.thymeleaf.cache=false
 spring.template.cache=false
+spring.data.mongodb.port=0