Polish "Allow easy customization of EmbeddedMongo DownloadConfig"

Closes gh-15496

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

 /*
- * 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.
@@ -17,17 +17,18 @@
 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
- * EmbeddedMongo {@link DownloadConfigBuilder} outcome whilst retaining default
+ * {@link IDownloadConfig} via a {@link DownloadConfigBuilder} whilst retaining default
  * auto-configuration.
  *
  * @author Michael Gmeiner
  * @since 2.2.0
  */
 @FunctionalInterface
-public interface EmbeddedMongoDownloadConfigBuilderCustomizer {
+public interface DownloadConfigBuilderCustomizer {
 
 	/**
 	 * Customize the {@link DownloadConfigBuilder}.

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

 /*
- * 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;
@@ -204,41 +205,29 @@ public class EmbeddedMongoAutoConfiguration {
 	@ConditionalOnMissingBean(IRuntimeConfig.class)
 	static class RuntimeConfigConfiguration {
 
-		private static Logger EMBEDDED_MONGO_LOGGER = LoggerFactory
-				.getLogger(RuntimeConfigConfiguration.class.getPackage().getName()
-						+ ".EmbeddedMongo");
-
 		@Bean
 		public IRuntimeConfig embeddedMongoRuntimeConfig(
-				IDownloadConfig embeddedMongoDownloadConfig) {
+				ObjectProvider<DownloadConfigBuilderCustomizer> downloadConfigBuilderCustomizers) {
+			Logger logger = LoggerFactory
+					.getLogger(getClass().getPackage().getName() + ".EmbeddedMongo");
 			ProcessOutput processOutput = new ProcessOutput(
-					Processors.logTo(EMBEDDED_MONGO_LOGGER, Slf4jLevel.INFO),
-					Processors.logTo(EMBEDDED_MONGO_LOGGER, Slf4jLevel.ERROR),
-					Processors.named("[console>]",
-							Processors.logTo(EMBEDDED_MONGO_LOGGER, Slf4jLevel.DEBUG)));
-			return new RuntimeConfigBuilder()
-					.defaultsWithLogger(Command.MongoD, EMBEDDED_MONGO_LOGGER)
-					.processOutput(processOutput)
-					.artifactStore(getArtifactStore(embeddedMongoDownloadConfig)).build();
+					Processors.logTo(logger, Slf4jLevel.INFO),
+					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,
+							downloadConfigBuilderCustomizers.orderedStream()))
+					.build();
 		}
 
-		@Bean
-		@ConditionalOnMissingBean
-		public IDownloadConfig embeddedMongoDownloadConfig(
-				ObjectProvider<EmbeddedMongoDownloadConfigBuilderCustomizer> downloadConfigBuilderCustomizer) {
+		private ArtifactStoreBuilder getArtifactStore(Logger logger,
+				Stream<DownloadConfigBuilderCustomizer> downloadConfigBuilderCustomizers) {
 			DownloadConfigBuilder downloadConfigBuilder = new DownloadConfigBuilder()
 					.defaultsForCommand(Command.MongoD);
-
-			downloadConfigBuilder
-					.progressListener(new Slf4jProgressListener(EMBEDDED_MONGO_LOGGER));
-
-			downloadConfigBuilderCustomizer.stream()
-					.forEach((c) -> c.customize(downloadConfigBuilder));
-
-			return downloadConfigBuilder.build();
-		}
-
-		private ArtifactStoreBuilder getArtifactStore(IDownloadConfig downloadConfig) {
+			downloadConfigBuilder.progressListener(new Slf4jProgressListener(logger));
+			downloadConfigBuilderCustomizers
+					.forEach((customizer) -> customizer.customize(downloadConfigBuilder));
+			IDownloadConfig downloadConfig = downloadConfigBuilder.build();
 			return new ExtractedArtifactStoreBuilder().defaults(Command.MongoD)
 					.download(downloadConfig);
 		}

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

 /*
- * 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.
@@ -22,19 +22,19 @@ import java.util.EnumSet;
 import java.util.stream.Collectors;
 
 import com.mongodb.MongoClient;
-import de.flapdoodle.embed.mongo.config.DownloadConfigBuilder;
 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 de.flapdoodle.embed.process.io.progress.Slf4jProgressListener;
 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;
@@ -184,27 +184,12 @@ public class EmbeddedMongoAutoConfigurationTests {
 	}
 
 	@Test
-	public void defaultDownloadConfiguration() {
-		load();
-		IDownloadConfig downloadConfig = this.context.getBean(IDownloadConfig.class);
-
-		assertThat(downloadConfig.getDownloadPath().getClass().getSimpleName())
-				.isEqualTo("PlatformDependentDownloadPath");
-		assertThat(downloadConfig.getUserAgent()).isEqualTo(
-				"Mozilla/5.0 (compatible; Embedded MongoDB; +https://github.com/flapdoodle-oss/embedmongo.flapdoodle.de)");
-		assertThat(downloadConfig.getProgressListener())
-				.isInstanceOf(Slf4jProgressListener.class);
-	}
-
-	@Test
-	public void customizedDownloadConfiguration() {
-		load(TestEmbeddedMongoDownloadConfigBuilderCustomizer.class);
-
-		IDownloadConfig downloadConfig = this.context.getBean(IDownloadConfig.class);
-		assertThat(downloadConfig.getDownloadPath().getPath(null)).isEqualTo("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");
-		assertThat(downloadConfig.getProgressListener())
-				.isInstanceOf(Slf4jProgressListener.class);
 	}
 
 	private void assertVersionConfiguration(String configuredVersion,
@@ -254,13 +239,14 @@ public class EmbeddedMongoAutoConfigurationTests {
 
 	}
 
-	private static class TestEmbeddedMongoDownloadConfigBuilderCustomizer
-			implements EmbeddedMongoDownloadConfigBuilderCustomizer {
+	@Configuration
+	static class DownloadConfigBuilderCustomizerConfiguration {
 
-		@Override
-		public void customize(DownloadConfigBuilder downloadConfigBuilder) {
-			downloadConfigBuilder.downloadPath("test");
-			downloadConfigBuilder.userAgent("Test User Agent");
+		@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.