Add CloudFoundry-specific InfoContributor

initializr-service/src/main/java/io/spring/initializr/service/info/CloudFoundryInfoContributor.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2012-2017 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 io.spring.initializr.service.info;
+
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import org.springframework.boot.actuate.info.Info;
+import org.springframework.boot.actuate.info.InfoContributor;
+import org.springframework.core.env.Environment;
+import org.springframework.stereotype.Component;
+import org.springframework.util.StringUtils;
+
+/**
+ * An {@link InfoContributor} that exposes the name of the app. Useful in a blue/green
+ * deployment scenario as the name of the app provides a hint to that.
+ *
+ * @author Stephane Nicoll
+ */
+@Component
+public class CloudFoundryInfoContributor implements InfoContributor {
+
+	private final Environment environment;
+
+	public CloudFoundryInfoContributor(Environment environment) {
+		this.environment = environment;
+	}
+
+	@Override
+	public void contribute(Info.Builder builder) {
+		String applicationName = this.environment.getProperty("vcap.application.name");
+		if (StringUtils.hasText(applicationName)) {
+			Map<String, String> details = new LinkedHashMap<>();
+			details.put("name", applicationName);
+			builder.withDetail("app", details);
+		}
+	}
+
+}

initializr-service/src/test/java/io/spring/initializr/service/info/CloudFoundryInfoContributorTests.java

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+/*
+ * Copyright 2012-2017 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 io.spring.initializr.service.info;
+
+import java.util.Map;
+
+import org.junit.Test;
+
+import org.springframework.boot.actuate.info.Info;
+import org.springframework.core.env.Environment;
+import org.springframework.mock.env.MockEnvironment;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Java6Assertions.entry;
+
+/**
+ *
+ * @author Stephane Nicoll
+ */
+public class CloudFoundryInfoContributorTests {
+
+	private final MockEnvironment environment = new MockEnvironment();
+
+	@Test
+	public void noVcap() {
+		Info info = getInfo(this.environment);
+		assertThat(info.getDetails()).isEmpty();
+	}
+
+	@Test
+	public void applicationName() {
+		this.environment.setProperty("vcap.application.name", "foo-bar");
+		Info info = getInfo(this.environment);
+		assertThat(info.getDetails()).containsOnlyKeys("app");
+		Object appDetails = info.getDetails().get("app");
+		assertThat(appDetails).isInstanceOf(Map.class);
+		assertThat((Map<String, Object>) appDetails).containsOnly(
+				entry("name", "foo-bar"));
+	}
+
+	private static Info getInfo(Environment env) {
+		Info.Builder builder = new Info.Builder();
+		new CloudFoundryInfoContributor(env).contribute(builder);
+		return builder.build();
+	}
+
+}