Polish info contributor feature

This commit improves the `InfoContributor` infrastructure as follows:

* `InfoEndpoint` no longer breaks its public API and returns a Map as
before
* `Info` is now immutable
* All properties of the build are now displayed. Since we control the
generation of that file, there is no longer a mode to restrict what's
shown
* Build info is now generated in `META-INF/build-info.properties` by
default

Closes gh-5734

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/InfoContributorAutoConfiguration.java

@@ -82,8 +82,7 @@ public class InfoContributorAutoConfiguration {
 	@ConditionalOnSingleCandidate(BuildProperties.class)
 	@Order(DEFAULT_ORDER)
 	public InfoContributor buildInfoContributor(BuildProperties buildProperties) {
-		return new BuildInfoContributor(buildProperties,
-				this.properties.getBuild().getMode());
+		return new BuildInfoContributor(buildProperties);
 	}
 
 }

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/InfoContributorProperties.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.actuate.autoconfigure;
 
-import org.springframework.boot.actuate.info.BuildInfoContributor;
 import org.springframework.boot.actuate.info.GitInfoContributor;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 
@@ -29,34 +28,12 @@ import org.springframework.boot.context.properties.ConfigurationProperties;
 @ConfigurationProperties("management.info")
 public class InfoContributorProperties {
 
-	private final Build build = new Build();
-
 	private final Git git = new Git();
 
-	public Build getBuild() {
-		return this.build;
-	}
-
 	public Git getGit() {
 		return this.git;
 	}
 
-	public static class Build {
-
-		/**
-		 * Mode to use to expose build information.
-		 */
-		private BuildInfoContributor.Mode mode = BuildInfoContributor.Mode.SIMPLE;
-
-		public BuildInfoContributor.Mode getMode() {
-			return this.mode;
-		}
-
-		public void setMode(BuildInfoContributor.Mode mode) {
-			this.mode = mode;
-		}
-
-	}
 
 	public static class Git {
 

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/InfoEndpoint.java

@@ -33,7 +33,7 @@ import org.springframework.util.Assert;
  * @author Stephane Nicoll
  */
 @ConfigurationProperties(prefix = "endpoints.info")
-public class InfoEndpoint extends AbstractEndpoint<Info> {
+public class InfoEndpoint extends AbstractEndpoint<Map<String, Object>> {
 
 	private final List<InfoContributor> infoContributors;
 
@@ -48,13 +48,14 @@ public class InfoEndpoint extends AbstractEndpoint<Info> {
 	}
 
 	@Override
-	public Info invoke() {
+	public Map<String, Object> invoke() {
 		Info.Builder builder = new Info.Builder();
 		for (InfoContributor contributor : this.infoContributors) {
 			contributor.contribute(builder);
 		}
 		builder.withDetails(getAdditionalInfo());
-		return builder.build();
+		Info build = builder.build();
+		return build.getDetails();
 	}
 
 	/**

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/info/BuildInfoContributor.java

@@ -31,12 +31,8 @@ import org.springframework.core.env.PropertySource;
  */
 public class BuildInfoContributor extends InfoPropertiesInfoContributor<BuildProperties> {
 
-	public BuildInfoContributor(BuildProperties properties, Mode mode) {
-		super(properties, mode);
-	}
-
 	public BuildInfoContributor(BuildProperties properties) {
-		this(properties, Mode.SIMPLE);
+		super(properties, Mode.FULL);
 	}
 
 	@Override

spring-boot-actuator/src/main/java/org/springframework/boot/actuate/info/Info.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.actuate.info;
 
+import java.util.Collections;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
@@ -39,8 +40,9 @@ public final class Info {
 	private final Map<String, Object> details;
 
 	private Info(Builder builder) {
-		this.details = new LinkedHashMap<String, Object>();
-		this.details.putAll(builder.content);
+		LinkedHashMap<String, Object> content = new LinkedHashMap<String, Object>();
+		content.putAll(builder.content);
+		this.details = Collections.unmodifiableMap(content);
 	}
 
 	/**

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/EndpointAutoConfigurationTests.java

@@ -187,7 +187,7 @@ public class EndpointAutoConfigurationTests {
 		this.context.refresh();
 
 		InfoEndpoint endpoint = this.context.getBean(InfoEndpoint.class);
-		Info info = endpoint.invoke();
+		Map<String, Object> info = endpoint.invoke();
 		assertThat(info).isNotNull();
 		assertThat(info.get("name")).isEqualTo("foo");
 		assertThat(info.get("version")).isEqualTo("1.0");

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/autoconfigure/InfoContributorAutoConfigurationTests.java

@@ -115,7 +115,7 @@ public class InfoContributorAutoConfigurationTests {
 
 	@SuppressWarnings("unchecked")
 	@Test
-	public void buildPropertiesDefaultMode() {
+	public void buildProperties() {
 		load(BuildPropertiesConfiguration.class);
 		Map<String, InfoContributor> beans = this.context
 				.getBeansOfType(InfoContributor.class);
@@ -125,18 +125,6 @@ public class InfoContributorAutoConfigurationTests {
 		Object build = content.get("build");
 		assertThat(build).isInstanceOf(Map.class);
 		Map<String, Object> buildInfo = (Map<String, Object>) build;
-		assertThat(buildInfo).containsOnlyKeys("group", "artifact");
-	}
-
-	@SuppressWarnings("unchecked")
-	@Test
-	public void buildPropertiesFullMode() {
-		load(BuildPropertiesConfiguration.class, "management.info.build.mode=full");
-		Map<String, Object> content = invokeContributor(
-				this.context.getBean("buildInfoContributor", InfoContributor.class));
-		Object build = content.get("build");
-		assertThat(build).isInstanceOf(Map.class);
-		Map<String, Object> buildInfo = (Map<String, Object>) build;
 		assertThat(buildInfo).containsOnlyKeys("group", "artifact", "foo");
 		assertThat(buildInfo.get("foo")).isEqualTo("bar");
 	}

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/InfoEndpointTests.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.endpoint;
 
 import java.util.List;
+import java.util.Map;
 
 import org.junit.Test;
 
@@ -43,7 +44,7 @@ public class InfoEndpointTests extends AbstractEndpointTests<InfoEndpoint> {
 
 	@Test
 	public void invoke() throws Exception {
-		Info actual = getEndpointBean().invoke();
+		Map<String, Object> actual = getEndpointBean().invoke();
 		assertThat(actual.get("key1")).isEqualTo("value1");
 	}
 

spring-boot-actuator/src/test/java/org/springframework/boot/actuate/info/InfoTests.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2012-2016 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 org.springframework.boot.actuate.info;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.entry;
+
+/**
+ * Tests for {@link Info}.
+ *
+ * @author Stephane Nicoll
+ */
+public class InfoTests {
+
+	@Rule
+	public ExpectedException thrown = ExpectedException.none();
+
+	@Test
+	public void infoIsImmutable() {
+		Info info = new Info.Builder().withDetail("foo", "bar").build();
+
+		this.thrown.expect(UnsupportedOperationException.class);
+		info.getDetails().clear();
+	}
+
+	@Test
+	public void infoTakesCopyOfMap() {
+		Info.Builder builder = new Info.Builder();
+		builder.withDetail("foo", "bar");
+		Info build = builder.build();
+		builder.withDetail("biz", "bar");
+		assertThat(build.getDetails()).containsOnly(entry("foo", "bar"));
+	}
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/info/ProjectInfoAutoConfiguration.java

@@ -62,7 +62,7 @@ public class ProjectInfoAutoConfiguration {
 		return new GitProperties(loadFrom(this.properties.getGit().getLocation(), "git"));
 	}
 
-	@ConditionalOnResource(resources = "${spring.info.build.location:classpath:META-INF/boot/build.properties}")
+	@ConditionalOnResource(resources = "${spring.info.build.location:classpath:META-INF/build-info.properties}")
 	@ConditionalOnMissingBean
 	@Bean
 	public BuildProperties buildProperties() throws Exception {

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/info/ProjectInfoProperties.java

@@ -59,10 +59,10 @@ public class ProjectInfoProperties {
 	public static class Build {
 
 		/**
-		 * Location of the generated build.properties file.
+		 * Location of the generated build-info.properties file.
 		 */
 		private Resource location = new ClassPathResource(
-				"META-INF/boot/build.properties");
+				"META-INF/build-info.properties");
 
 		public Resource getLocation() {
 			return this.location;

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/info/ProjectInfoAutoConfigurationTests.java

@@ -105,7 +105,7 @@ public class ProjectInfoAutoConfigurationTests {
 
 	@Test
 	public void buildPropertiesCustomLocation() {
-		load("spring.info.build.location=classpath:/org/springframework/boot/autoconfigure/info/build.properties");
+		load("spring.info.build.location=classpath:/org/springframework/boot/autoconfigure/info/build-info.properties");
 		BuildProperties buildProperties = this.context.getBean(BuildProperties.class);
 		assertThat(buildProperties.getGroup()).isEqualTo("com.example.acme");
 		assertThat(buildProperties.getArtifact()).isEqualTo("acme");
@@ -116,7 +116,7 @@ public class ProjectInfoAutoConfigurationTests {
 
 	@Test
 	public void buildPropertiesCustomInvalidLocation() {
-		load("spring.info.build.location=classpath:/org/acme/no-build.properties");
+		load("spring.info.build.location=classpath:/org/acme/no-build-info.properties");
 		Map<String, BuildProperties> beans = this.context
 				.getBeansOfType(BuildProperties.class);
 		assertThat(beans).hasSize(0);

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -86,7 +86,7 @@ content into your application; rather pick only the properties that you need.
 	spring.hazelcast.config= # The location of the configuration file to use to initialize Hazelcast.
 
 	# PROJECT INFORMATION ({sc-spring-boot-autoconfigure}/info/ProjectInfoProperties.{sc-ext}[ProjectInfoProperties])
-	spring.info.build.location=classpath:META-INF/boot/build.properties # Location of the generated build.properties file.
+	spring.info.build.location=classpath:META-INF/build-info.properties # Location of the generated build-info.properties file.
 	spring.info.git.location=classpath:git.properties # Location of the generated git.properties file.
 
 	# JMX
@@ -1015,7 +1015,6 @@ content into your application; rather pick only the properties that you need.
 
 	# INFO CONTRIBUTORS ({sc-spring-boot-actuator}/autoconfigure/InfoContributorProperties.{sc-ext}[InfoContributorProperties])
 	management.info.build.enabled=true # Enable build info.
-	management.info.build.mode=simple # Mode to use to expose build information.
 	management.info.defaults.enabled=true # Enable default info contributors.
 	management.info.env.enabled=true # Enable environment info.
 	management.info.git.enabled=true # Enable git info.

spring-boot-docs/src/main/asciidoc/production-ready-features.adoc

@@ -393,7 +393,7 @@ The following `InfoContributors` are auto-configured by Spring Boot when appropr
 |Expose git information if a `git.properties` file is available.
 
 |{sc-spring-boot-actuator}/info/BuildInfoContributor.{sc-ext}[`BuildInfoContributor`]
-|Expose build information if a `META-INF/boot/build.properties` file is available.
+|Expose build information if a `META-INF/build-info.properties` file is available.
 |===
 
 TIP: It is possible to disable them all using the `management.info.defaults.enabled`
@@ -453,19 +453,12 @@ If you want to display the full git information (i.e. the full content of
 [[production-ready-application-info-build]]
 ==== Build information
 The `info` endpoint can also publish information about your build if a `BuildProperties`
-bean is available. This happens if a `META-INF/boot/build.properties` file is available
+bean is available. This happens if a `META-INF/build-info.properties` file is available
 in the classpath.
 
 TIP: The Maven and Gradle plugins can both generate that file, see
 <<howto.adoc#howto-build-info,Generate build information>> for more details.
 
-If additional properties are present they are not exposed unless configured explicitly:
-
-[source,properties,indent=0]
-----
-	management.info.build.mode=full
-----
-
 
 [[production-ready-application-info-custom]]
 ==== Writing custom InfoContributors

spring-boot-tools/spring-boot-gradle-plugin/src/main/java/org/springframework/boot/gradle/buildinfo/BuildInfo.java

@@ -34,11 +34,11 @@ import org.springframework.boot.loader.tools.BuildPropertiesWriter;
 import org.springframework.boot.loader.tools.BuildPropertiesWriter.ProjectDetails;
 
 /**
- * {@link DefaultTask} for generating a {@code build.properties} file from a
+ * {@link DefaultTask} for generating a {@code build-info.properties} file from a
  * {@code Project}.
  * <p>
- * By default, the {@code build.properties} file is generated in
- * project.buildDir/resources/main/META-INF/boot.
+ * By default, the {@code build-info.properties} file is generated in
+ * project.buildDir/resources/main/META-INF.
  * </p>
  *
  * @author Andy Wilkinson
@@ -47,7 +47,7 @@ public class BuildInfo extends DefaultTask {
 
 	@OutputFile
 	private File outputFile = getProject().file(new File(getProject().getBuildDir(),
-			"resources/main/META-INF/boot/build.properties"));
+			"resources/main/META-INF/build-info.properties"));
 
 	@Input
 	private String projectGroup = getProject().getGroup().toString();

spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/BuildPropertiesWriter.java

@@ -25,8 +25,8 @@ import java.util.Map;
 import java.util.Properties;
 
 /**
- * A {@code BuildPropertiesWriter} writes the {@code build.properties} for consumption by
- * the Actuator.
+ * A {@code BuildPropertiesWriter} writes the {@code build-info.properties} for
+ * consumption by the Actuator.
  *
  * @author Andy Wilkinson
  * @author Stephane Nicoll

spring-boot-tools/spring-boot-maven-plugin/src/it/build-info-additional-properties/verify.groovy

@@ -3,7 +3,7 @@ import org.springframework.boot.maven.Verify
 import static org.junit.Assert.assertEquals
 import static org.junit.Assert.assertTrue
 
-def file = new File(basedir, "target/classes/META-INF/boot/build.properties")
+def file = new File(basedir, "target/classes/META-INF/build-info.properties")
 println file.getAbsolutePath()
 Properties properties = Verify.verifyBuildInfo(file,
 		'org.springframework.boot.maven.it', 'build-info-additional-properties',

spring-boot-tools/spring-boot-maven-plugin/src/it/build-info/verify.groovy

@@ -2,7 +2,7 @@ import org.springframework.boot.maven.Verify
 
 import static org.junit.Assert.assertTrue
 
-def file = new File(basedir, "target/classes/META-INF/boot/build.properties")
+def file = new File(basedir, "target/classes/META-INF/build-info.properties")
 println file.getAbsolutePath()
 Properties properties = Verify.verifyBuildInfo(file,
 		'org.springframework.boot.maven.it', 'build-info',

spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/BuildInfoMojo.java

@@ -31,7 +31,7 @@ import org.springframework.boot.loader.tools.BuildPropertiesWriter;
 import org.springframework.boot.loader.tools.BuildPropertiesWriter.ProjectDetails;
 
 /**
- * Generate a {@code build.properties} file based the content of the current
+ * Generate a {@code build-info.properties} file based the content of the current
  * {@link MavenProject}.
  *
  * @author Stephane Nicoll
@@ -47,14 +47,14 @@ public class BuildInfoMojo extends AbstractMojo {
 	private MavenProject project;
 
 	/**
-	 * The location of the generated build.properties.
+	 * The location of the generated build-info.properties.
 	 */
-	@Parameter(defaultValue = "${project.build.outputDirectory}/META-INF/boot/build.properties")
+	@Parameter(defaultValue = "${project.build.outputDirectory}/META-INF/build-info.properties")
 	private File outputFile;
 
 	/**
-	 * Additional properties to store in the build.properties. Each entry is prefixed by
-	 * {@code build.} in the generated build.properties.
+	 * Additional properties to store in the build-info.properties. Each entry is prefixed by
+	 * {@code build.} in the generated build-info.properties.
 	 */
 	@Parameter
 	private Map<String, String> additionalProperties;

spring-boot-tools/spring-boot-maven-plugin/src/site/apt/examples/build-info.apt.vm

@@ -6,7 +6,7 @@
  2016-03-17
  -----
 
-  Spring Boot Actuator displays build-related information if a <<<META-INF/boot/build.properties>>>
+  Spring Boot Actuator displays build-related information if a <<<META-INF/build-info.properties>>>
   file is present. The <<<build-info>>> goal generates such file with the coordinates of the project
   and the build time. It also allows you to add an arbitrary number of additional properties:
 
@@ -46,10 +46,10 @@
 </project>
 ---
 
-  This configuration will generate a <<<build.properties>>> at the expected location with four
-  additional keys. Note that <<<maven.compiler.source>>> and <<<maven.compiler.target>>> are
-  expected to be regular properties available in the project. They will be interpolated as you
-  would expect.
+  This configuration will generate a <<<build-info.properties>>> at the expected location with
+  four additional keys. Note that <<<maven.compiler.source>>> and <<<maven.compiler.target>>>
+  are expected to be regular properties available in the project. They will be interpolated as
+  you would expect.