Support for Spring Modulith dependencies.

This commit adds support to add Spring Modulith to a project. We add the Event Publication Registry matching the (optionally) also selected persistence flavor (JPA, JDBC, MongoDB). Also, the observability support in case any of the supported observability backends is selected as dependency.

start-site/src/main/java/io/spring/start/site/extension/dependency/springmodulith/SpringModulithBuildCustomizer.java

@@ -0,0 +1,104 @@
+/*
+ * Copyright 2012-2023 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 io.spring.start.site.extension.dependency.springmodulith;
+
+import java.util.Collection;
+import java.util.List;
+
+import io.spring.initializr.generator.buildsystem.Build;
+import io.spring.initializr.generator.buildsystem.Dependency;
+import io.spring.initializr.generator.buildsystem.Dependency.Builder;
+import io.spring.initializr.generator.buildsystem.DependencyContainer;
+import io.spring.initializr.generator.buildsystem.DependencyScope;
+import io.spring.initializr.generator.spring.build.BuildCustomizer;
+
+/**
+ * Registers Spring Modulith dependencies to the build file of the project to be created,
+ * in particular registering integration dependencies depending on others registered for
+ * inclusion as well (observability and persistence).
+ *
+ * @author Oliver Drotbohm
+ */
+class SpringModulithBuildCustomizer implements BuildCustomizer<Build> {
+
+	static final String GROUP_ID = "org.springframework.experimental";
+	static final String BOM_ARTIFACT_ID = "spring-modulith-bom";
+
+	static final Collection<String> OBSERVABILITY_DEPENDENCIES = List.of("datadog", "graphite", "influx", "new-relic",
+			"prometheus", "wavefront", "zipkin");
+
+	private static final String ARTIFACT_PREFIX = "spring-modulith-";
+
+	private static final Builder<?> ACTUATOR = Dependency.withCoordinates(GROUP_ID, ARTIFACT_PREFIX + "actuator")
+		.scope(DependencyScope.RUNTIME);
+
+	private static final Builder<?> OBSERVABILITY = Dependency
+		.withCoordinates(GROUP_ID, ARTIFACT_PREFIX + "observability")
+		.scope(DependencyScope.RUNTIME);
+
+	private static final Builder<?> STARTER_JDBC = Dependency.withCoordinates(GROUP_ID,
+			ARTIFACT_PREFIX + "starter-jdbc");
+
+	private static final Builder<?> STARTER_JPA = Dependency.withCoordinates(GROUP_ID, ARTIFACT_PREFIX + "starter-jpa");
+
+	private static final Builder<?> STARTER_MONGODB = Dependency.withCoordinates(GROUP_ID,
+			ARTIFACT_PREFIX + "starter-mongodb");
+
+	private static final Builder<?> TEST = Dependency.withCoordinates(GROUP_ID, ARTIFACT_PREFIX + "starter-test")
+		.scope(DependencyScope.TEST_COMPILE);
+
+	@Override
+	public void customize(Build build) {
+		DependencyContainer dependencies = build.dependencies();
+
+		// Actuator
+
+		if (dependencies.has("actuator")) {
+			dependencies.add("modulith-actuator", ACTUATOR);
+		}
+
+		// Observability
+
+		if (OBSERVABILITY_DEPENDENCIES.stream().anyMatch(dependencies::has)) {
+			dependencies.add("modulith-observability", OBSERVABILITY);
+		}
+
+		// Event publication registry support
+
+		addEventPublicationRegistryBackend(build);
+
+		dependencies.add("modulith-starter-test", TEST);
+	}
+
+	private void addEventPublicationRegistryBackend(Build build) {
+
+		DependencyContainer dependencies = build.dependencies();
+
+		if (dependencies.has("data-mongodb")) {
+			dependencies.add("modulith-starter-mongodb", STARTER_MONGODB);
+		}
+
+		if (dependencies.has("data-jdbc")) {
+			dependencies.add("modulith-starter-jdbc", STARTER_JDBC);
+		}
+
+		if (dependencies.has("data-jpa")) {
+			dependencies.add("modulith-starter-jpa", STARTER_JPA);
+		}
+	}
+
+}

start-site/src/main/java/io/spring/start/site/extension/dependency/springmodulith/SpringModulithProjectGenerationConfiguration.java

@@ -0,0 +1,39 @@
+/*
+ * Copyright 2012-2023 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 io.spring.start.site.extension.dependency.springmodulith;
+
+import io.spring.initializr.generator.condition.ConditionalOnRequestedDependency;
+import io.spring.initializr.generator.project.ProjectGenerationConfiguration;
+
+import org.springframework.context.annotation.Bean;
+
+/**
+ * Registers {@link SpringModulithBuildCustomizer} with the context to allow selecting
+ * Spring Modulith dependencies.
+ *
+ * @author Oliver Drotbohm
+ */
+@ProjectGenerationConfiguration
+@ConditionalOnRequestedDependency("modulith")
+class SpringModulithProjectGenerationConfiguration {
+
+	@Bean
+	SpringModulithBuildCustomizer springModulithBuildCustomizer() {
+		return new SpringModulithBuildCustomizer();
+	}
+
+}

start-site/src/main/java/io/spring/start/site/extension/dependency/springmodulith/package-info.java

@@ -0,0 +1,20 @@
+/*
+ * Copyright 2012-2023 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.
+ */
+
+/**
+ * Extensions for generation of projects that depend on Spring Modulith.
+ */
+package io.spring.start.site.extension.dependency.springmodulith;

start-site/src/main/resources/META-INF/spring.factories

@@ -25,6 +25,7 @@ io.spring.start.site.extension.dependency.springboot.SpringBootProjectGeneration
 io.spring.start.site.extension.dependency.springcloud.SpringCloudProjectGenerationConfiguration,\
 io.spring.start.site.extension.dependency.springdata.SpringDataProjectGenerationConfiguration,\
 io.spring.start.site.extension.dependency.springintegration.SpringIntegrationProjectGenerationConfiguration,\
+io.spring.start.site.extension.dependency.springmodulith.SpringModulithProjectGenerationConfiguration,\
 io.spring.start.site.extension.dependency.springpulsar.SpringPulsarProjectGenerationConfiguration,\
 io.spring.start.site.extension.dependency.springrestdocs.SpringRestDocsProjectGenerationConfiguration,\
 io.spring.start.site.extension.dependency.sqlserver.SqlServerProjectGenerationConfiguration,\

start-site/src/main/resources/application.yml

@@ -139,6 +139,13 @@ initializr:
             version: 3.5.0
           - compatibilityRange: "[3.0.0,3.1.0-M1)"
             version: 4.0.0
+      spring-modulith:
+        groupId: org.springframework.modulith
+        artifactId: spring-modulith-bom
+        mappings:
+          - compatibility-range: "[3.1.0,3.2.0-M1)"
+            version: 1.0.0-M1
+            repositories: spring-milestones
       spring-shell:
         groupId: org.springframework.shell
         artifactId: spring-shell-dependencies
@@ -252,6 +259,15 @@ initializr:
           links:
             - rel: reference
               href: https://docs.spring.io/spring-boot/docs/{bootVersion}/reference/htmlsingle/#features.docker-compose
+        - name: Spring Modulith
+          id: modulith
+          group-id: org.springframework.modulith
+          artifact-id: spring-modulith-starter-core
+          description: Support for building modular monolithic applications.
+          bom: spring-modulith
+          links:
+            - rel: reference
+              href: https://docs.spring.io/spring-modulith/docs/current/reference/html/
     - name: Web
       content:
         - name: Spring Web

start-site/src/test/java/io/spring/start/site/extension/dependency/springmodulith/SpringModulithBuildCustomizerTests.java

@@ -0,0 +1,109 @@
+/*
+ * Copyright 2012-2023 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 io.spring.start.site.extension.dependency.springmodulith;
+
+import java.util.Collection;
+
+import io.spring.initializr.generator.buildsystem.Build;
+import io.spring.initializr.generator.buildsystem.maven.MavenBuild;
+import io.spring.initializr.generator.version.Version;
+import io.spring.initializr.metadata.InitializrMetadata;
+import io.spring.initializr.metadata.support.MetadataBuildItemResolver;
+import io.spring.start.site.extension.AbstractExtensionTests;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link SpringModulithBuildCustomizer}.
+ *
+ * @author Oliver Drotbohm
+ */
+class SpringModulithBuildCustomizerTests extends AbstractExtensionTests {
+
+	private final SpringModulithBuildCustomizer customizer = new SpringModulithBuildCustomizer();
+
+	@Test
+	void registersCoreStarterByDefault() {
+		Build build = createBuild();
+		this.customizer.customize(build);
+
+		assertThat(build.dependencies().ids()).contains("modulith");
+	}
+
+	@Test
+	void registersTestStarterByDefault() {
+		Build build = createBuild();
+		this.customizer.customize(build);
+
+		assertThat(build.dependencies().ids()).contains("modulith-starter-test");
+	}
+
+	@Test
+	void registersActuatorStarterIfActuatorsIsPresent() {
+		Build build = createBuild();
+		build.dependencies().add("actuator");
+
+		this.customizer.customize(build);
+
+		assertThat(build.dependencies().ids()).contains("modulith-actuator");
+	}
+
+	@ParameterizedTest
+	@MethodSource("observabilityDependencies")
+	void registersObservabilityStarterIfObservabilityDependencyIsPresent(String dependency) {
+		Build build = createBuild();
+		build.dependencies().add(dependency);
+
+		this.customizer.customize(build);
+
+		assertThat(build.dependencies().ids()).contains("modulith-observability");
+	}
+
+	@ParameterizedTest
+	@ValueSource(strings = { "jdbc", "jpa", "mongodb" })
+	void presenceOfSpringDataModuleAddsModuleEventStarter(String store) {
+		Build build = createBuild();
+		build.dependencies().add("data-" + store);
+
+		this.customizer.customize(build);
+
+		assertThat(build.dependencies().ids()).contains("modulith-starter-" + store);
+		assertThat(build.boms().has("spring-modulith"));
+	}
+
+	private Build createBuild() {
+		InitializrMetadata metadata = getMetadata();
+
+		Build build = new MavenBuild(new MetadataBuildItemResolver(metadata, getDefaultPlatformVersion(metadata)));
+		build.dependencies().add("modulith");
+
+		return build;
+	}
+
+	private static Version getDefaultPlatformVersion(InitializrMetadata metadata) {
+		return Version.parse(metadata.getBootVersions().getDefault().getId());
+	}
+
+	private static Collection<String> observabilityDependencies() {
+		return SpringModulithBuildCustomizer.OBSERVABILITY_DEPENDENCIES;
+	}
+
+}