Set up build to use Paketo build packs for Spring Native.

Use buildpack based native image builds. Remove offending libraries: both Spring Boot DevTools and the Thin Launcher are not native-ready yet. Added NativeConfiguration to capture a few manual hints still needed.

Declare Money as the type being returned from MonetaryAmountAttributeConverter.convertToEntityAttribute(…) so that it is automatically added to the reflection configuration (makes spring-attic/spring-native#826 obsolete).

$ Conflicts:
$	server/pom.xml

Author: odrotbohm

server/pom.xml

@@ -20,6 +20,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 		<java.version>17</java.version>
 		<jmolecules.version>2021.2.3</jmolecules.version>
 		<moduliths.version>1.3.0-RC1</moduliths.version>
+		<spring-native.version>0.11.4</spring-native.version>
 	</properties>
 
 	<dependencyManagement>
@@ -82,7 +83,7 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 		<dependency>
 			<groupId>org.springframework.data</groupId>
 			<artifactId>spring-data-rest-hal-explorer</artifactId>
-			<scope>runtime</scope>
+			<!--<scope>runtime</scope>-->
 		</dependency>
 
 		<dependency>
@@ -162,7 +163,21 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 			<artifactId>spring-boot-configuration-processor</artifactId>
 			<optional>true</optional>
 		</dependency>
-		
+
+		<!-- Spring native -->
+
+		<dependency>
+			<groupId>org.springframework.experimental</groupId>
+			<artifactId>spring-native</artifactId>
+			<version>${spring-native.version}</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.experimental</groupId>
+			<artifactId>spring-native-configuration</artifactId>
+			<version>${spring-native.version}</version>
+		</dependency>
+
 	</dependencies>
 
 	<profiles>
@@ -206,6 +221,14 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 
 			</dependencies>
 		</profile>
+
+		<profile>
+			<id>native</id>
+			<build>
+				<defaultGoal>spring-boot:build-image</defaultGoal>
+			</build>
+		</profile>
+
 	</profiles>
 
 	<build>
@@ -216,13 +239,21 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 				<artifactId>spring-boot-maven-plugin</artifactId>
 				<configuration>
 					<executable>true</executable>
+					<image>
+						<builder>paketobuildpacks/builder:tiny</builder>
+						<env>
+							<BP_NATIVE_IMAGE>true</BP_NATIVE_IMAGE>
+						</env>
+					</image>
 				</configuration>
 				<dependencies>
+					<!-- 
 					<dependency>
 						<groupId>org.springframework.boot.experimental</groupId>
 						<artifactId>spring-boot-thin-layout</artifactId>
 						<version>1.0.28.RELEASE</version>
 					</dependency>
+					-->
 				</dependencies>
 			</plugin>
 
@@ -246,6 +277,28 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 				</dependencies>
 			</plugin>
 
+			<plugin>
+				<groupId>org.springframework.experimental</groupId>
+				<artifactId>spring-aot-maven-plugin</artifactId>
+				<version>${spring-native.version}</version>
+				<executions>
+					<execution>
+						<id>generate</id>
+						<goals>
+							<goal>generate</goal>
+						</goals>
+					</execution>
+					<!--
+					<execution>
+						<id>test-generate</id>
+						<goals>
+							<goal>test-generate</goal>
+						</goals>
+					</execution>
+					-->
+				</executions>
+			</plugin>
+
 		</plugins>
 	</build>
 
@@ -264,6 +317,13 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 				<enabled>false</enabled>
 			</snapshots>
 		</repository>
+		<repository>
+			<id>spring-release</id>
+			<url>https://repo.spring.io/release</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</repository>
 	</repositories>
 
 	<pluginRepositories>
@@ -281,6 +341,13 @@ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/ma
 				<enabled>false</enabled>
 			</snapshots>
 		</pluginRepository>
+		<pluginRepository>
+			<id>spring-release</id>
+			<url>https://repo.spring.io/release</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</pluginRepository>
 	</pluginRepositories>
 
 </project>

server/src/main/java/org/springsource/restbucks/NativeConfiguration.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright 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.springsource.restbucks;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.nativex.hint.AotProxyHint;
+import org.springframework.nativex.hint.ProxyBits;
+import org.springsource.restbucks.drinks.Drink;
+
+/**
+ * Additional configuration needed to produce Graal metadata to let some application properly work on it.
+ *
+ * @author Oliver Drotbohm
+ */
+@Configuration
+
+// Due to DrinksOptions.BY_NAME (i.e. the usage of a domain type with Spring Data's TypedSort)
+@AotProxyHint(targetClass = Drink.class, proxyFeatures = ProxyBits.IS_STATIC)
+class NativeConfiguration {}

server/src/main/java/org/springsource/restbucks/core/MonetaryAmountAttributeConverter.java

@@ -45,7 +45,7 @@ public String convertToDatabaseColumn(MonetaryAmount amount) {
 	}
 
 	@Override
-	public MonetaryAmount convertToEntityAttribute(String source) {
+	public Money convertToEntityAttribute(String source) {
 
 		if (source == null) {
 			return null;