Add Spring Boot appplication main class for configuring and bootstrapping an Apache Geode or Pivotal GemFire Locator in a clustered topology.

spring-geode-docs/src/main/java/org/springframework/geode/docs/example/app/locator/SpringBootApacheGeodeLocatorApplication.java

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+/*
+ * Copyright 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.
+ * 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.springframework.geode.docs.example.app.locator;
+
+import java.util.Scanner;
+
+import org.apache.geode.distributed.Locator;
+
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Profile;
+import org.springframework.data.gemfire.config.annotation.EnableManager;
+import org.springframework.data.gemfire.config.annotation.LocatorApplication;
+import org.springframework.geode.config.annotation.UseLocators;
+
+/**
+ * The {@link SpringBootApacheGeodeLocatorApplication} class is a Spring Boot application that configures and bootstraps
+ * an Apache Geode or Pivotal GemFire {@link Locator} application JVM process.
+ *
+ * @author John Blum
+ * @see org.apache.geode.distributed.Locator
+ * @see org.springframework.boot.autoconfigure.SpringBootApplication
+ * @see org.springframework.boot.builder.SpringApplicationBuilder
+ * @see org.springframework.context.annotation.Configuration
+ * @see org.springframework.context.annotation.Profile
+ * @see org.springframework.data.gemfire.config.annotation.LocatorApplication
+ * @see org.springframework.data.gemfire.config.annotation.EnableManager
+ * @see org.springframework.geode.config.annotation.UseLocators
+ * @since 1.2.0
+ */
+// tag::class[]
+@UseLocators
+@SpringBootApplication
+@LocatorApplication(name = "SpringBootApacheGeodeLocatorApplication")
+public class SpringBootApacheGeodeLocatorApplication {
+
+	public static void main(String[] args) {
+
+		new SpringApplicationBuilder(SpringBootApacheGeodeLocatorApplication.class)
+			.web(WebApplicationType.NONE)
+			.build()
+			.run(args);
+
+		System.err.println("Press <enter> to exit!");
+
+		new Scanner(System.in).nextLine();
+	}
+
+	@Configuration
+	@EnableManager(start = true)
+	@Profile("manager")
+	@SuppressWarnings("unused")
+	static class ManagerConfiguration { }
+
+}
+// end::class[]