Merge pull request #15496 from mgmeiner

* pr/15496:
  Polish "Allow easy customization of EmbeddedMongo DownloadConfig"
  Allow easy customization of EmbeddedMongo DownloadConfig

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mongo/embedded/DownloadConfigBuilderCustomizer.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2012-2019 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 org.springframework.boot.autoconfigure.mongo.embedded;
+
+import de.flapdoodle.embed.mongo.config.DownloadConfigBuilder;
+import de.flapdoodle.embed.process.config.store.IDownloadConfig;
+
+/**
+ * Callback interface that can be implemented by beans wishing to customize the
+ * {@link IDownloadConfig} via a {@link DownloadConfigBuilder} whilst retaining default
+ * auto-configuration.
+ *
+ * @author Michael Gmeiner
+ * @since 2.2.0
+ */
+@FunctionalInterface
+public interface DownloadConfigBuilderCustomizer {
+
+	/**
+	 * Customize the {@link DownloadConfigBuilder}.
+	 * @param downloadConfigBuilder the {@link DownloadConfigBuilder} to customize
+	 */
+	void customize(DownloadConfigBuilder downloadConfigBuilder);
+
+}

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mongo/embedded/EmbeddedMongoAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -21,6 +21,7 @@ import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.stream.Stream;
 
 import com.mongodb.MongoClient;
 import de.flapdoodle.embed.mongo.Command;
@@ -39,6 +40,7 @@ import de.flapdoodle.embed.mongo.distribution.Version;
 import de.flapdoodle.embed.mongo.distribution.Versions;
 import de.flapdoodle.embed.process.config.IRuntimeConfig;
 import de.flapdoodle.embed.process.config.io.ProcessOutput;
+import de.flapdoodle.embed.process.config.store.IDownloadConfig;
 import de.flapdoodle.embed.process.distribution.GenericVersion;
 import de.flapdoodle.embed.process.io.Processors;
 import de.flapdoodle.embed.process.io.Slf4jLevel;
@@ -48,6 +50,7 @@ import de.flapdoodle.embed.process.store.ArtifactStoreBuilder;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.AutoConfigureBefore;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
@@ -203,7 +206,8 @@ public class EmbeddedMongoAutoConfiguration {
 	static class RuntimeConfigConfiguration {
 
 		@Bean
-		public IRuntimeConfig embeddedMongoRuntimeConfig() {
+		public IRuntimeConfig embeddedMongoRuntimeConfig(
+				ObjectProvider<DownloadConfigBuilderCustomizer> downloadConfigBuilderCustomizers) {
 			Logger logger = LoggerFactory
 					.getLogger(getClass().getPackage().getName() + ".EmbeddedMongo");
 			ProcessOutput processOutput = new ProcessOutput(
@@ -211,15 +215,21 @@ public class EmbeddedMongoAutoConfiguration {
 					Processors.logTo(logger, Slf4jLevel.ERROR), Processors.named(
 							"[console>]", Processors.logTo(logger, Slf4jLevel.DEBUG)));
 			return new RuntimeConfigBuilder().defaultsWithLogger(Command.MongoD, logger)
-					.processOutput(processOutput).artifactStore(getArtifactStore(logger))
+					.processOutput(processOutput).artifactStore(getArtifactStore(logger,
+							downloadConfigBuilderCustomizers.orderedStream()))
 					.build();
 		}
 
-		private ArtifactStoreBuilder getArtifactStore(Logger logger) {
+		private ArtifactStoreBuilder getArtifactStore(Logger logger,
+				Stream<DownloadConfigBuilderCustomizer> downloadConfigBuilderCustomizers) {
+			DownloadConfigBuilder downloadConfigBuilder = new DownloadConfigBuilder()
+					.defaultsForCommand(Command.MongoD);
+			downloadConfigBuilder.progressListener(new Slf4jProgressListener(logger));
+			downloadConfigBuilderCustomizers
+					.forEach((customizer) -> customizer.customize(downloadConfigBuilder));
+			IDownloadConfig downloadConfig = downloadConfigBuilder.build();
 			return new ExtractedArtifactStoreBuilder().defaults(Command.MongoD)
-					.download(new DownloadConfigBuilder()
-							.defaultsForCommand(Command.MongoD)
-							.progressListener(new Slf4jProgressListener(logger)).build());
+					.download(downloadConfig);
 		}
 
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mongo/embedded/EmbeddedMongoAutoConfigurationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2018 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -26,12 +26,15 @@ import de.flapdoodle.embed.mongo.config.IMongodConfig;
 import de.flapdoodle.embed.mongo.config.Storage;
 import de.flapdoodle.embed.mongo.distribution.Feature;
 import de.flapdoodle.embed.mongo.distribution.Version;
+import de.flapdoodle.embed.process.config.IRuntimeConfig;
+import de.flapdoodle.embed.process.config.store.IDownloadConfig;
 import org.bson.Document;
 import org.junit.After;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
 
+import org.springframework.beans.DirectFieldAccessor;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration;
 import org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration;
@@ -180,6 +183,15 @@ public class EmbeddedMongoAutoConfigurationTests {
 						.isEqualTo("testing");
 	}
 
+	@Test
+	public void customizeDownloadConfiguration() {
+		load(DownloadConfigBuilderCustomizerConfiguration.class);
+		IRuntimeConfig runtimeConfig = this.context.getBean(IRuntimeConfig.class);
+		IDownloadConfig downloadConfig = (IDownloadConfig) new DirectFieldAccessor(
+				runtimeConfig.getArtifactStore()).getPropertyValue("downloadConfig");
+		assertThat(downloadConfig.getUserAgent()).isEqualTo("Test User Agent");
+	}
+
 	private void assertVersionConfiguration(String configuredVersion,
 			String expectedVersion) {
 		this.context = new AnnotationConfigApplicationContext();
@@ -227,4 +239,16 @@ public class EmbeddedMongoAutoConfigurationTests {
 
 	}
 
+	@Configuration
+	static class DownloadConfigBuilderCustomizerConfiguration {
+
+		@Bean
+		public DownloadConfigBuilderCustomizer testDownloadConfigBuilderCustomizer() {
+			return (downloadConfigBuilder) -> {
+				downloadConfigBuilder.userAgent("Test User Agent");
+			};
+		}
+
+	}
+
 }

spring-boot-project/spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -4292,7 +4292,8 @@ If you have SLF4J on the classpath, the output produced by Mongo is automaticall
 to a logger named `org.springframework.boot.autoconfigure.mongo.embedded.EmbeddedMongo`.
 
 You can declare your own `IMongodConfig` and `IRuntimeConfig` beans to take control of
-the Mongo instance's configuration and logging routing.
+the Mongo instance's configuration and logging routing. The download configuration can be
+customized by declaring a `DownloadConfigBuilderCustomizer` bean.