Add Security Sample Guide and Code.

Resolves gh-81.

spring-geode-samples/boot/security/src/main/java/example/app/security/client/BootGeodeSecurityClientApplication.java

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+/*
+ * Copyright 2020 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 example.app.security.client;
+
+import example.app.security.client.model.Customer;
+import org.apache.geode.cache.Region;
+import org.apache.geode.cache.client.ClientCache;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.gemfire.config.annotation.EnableClusterConfiguration;
+import org.springframework.data.gemfire.config.annotation.EnableEntityDefinedRegions;
+
+/**
+ * The {@link BootGeodeSecurityClientApplication} class is a Spring Boot, Apache Geode {@link ClientCache}
+ * application that configures security.
+ *
+ * @author Patrick Johnson
+ * @see org.apache.geode.cache.client.ClientCache
+ * @see org.springframework.boot.SpringApplication
+ * @see org.springframework.boot.autoconfigure.SpringBootApplication
+ * @see org.springframework.context.annotation.Bean
+ * @see org.springframework.data.gemfire.config.annotation.ClientCacheApplication
+ * @since 1.3.0
+ */
+// tag::class[]
+@SpringBootApplication
+@EnableClusterConfiguration
+@EnableEntityDefinedRegions
+public class BootGeodeSecurityClientApplication {
+	public static void main(String[] args) {
+		new SpringApplicationBuilder(BootGeodeSecurityClientApplication.class)
+				.web(WebApplicationType.SERVLET)
+				.build()
+				.run(args);
+	}
+
+	@Bean
+	ApplicationRunner runner(@Qualifier("Customers") Region<Long, Customer> customers) {
+		return args -> {
+			customers.put(2L, Customer.newCustomer(2L, "William Evans"));
+			System.out.println(String.format("Successfully wrote data to region %s", customers.getName()));
+
+			try {
+				System.out.println(String.format("Attempting to read data from region %s", customers.getName()));
+				customers.get(2L);
+			} catch (Exception e) {
+				System.out.println(String.format("Read failed because \"%s\"", e.getCause().getMessage()));
+			}
+		};
+	}
+}
+// end::class[]

spring-geode-samples/boot/security/src/main/java/example/app/security/client/controller/SecurityController.java

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+/*
+ * Copyright 2020 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 example.app.security.client.controller;
+
+import example.app.security.client.BootGeodeSecurityClientApplication;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.core.env.Environment;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * The {@link SecurityController} class is a RestController used by {@link BootGeodeSecurityClientApplication}
+ *
+ * @author Patrick Johnson
+ * @see org.springframework.web.bind.annotation.RestController
+ * @since 1.3.0
+ */
+// tag::class[]
+@RestController
+public class SecurityController {
+
+	@Autowired
+	Environment env;
+
+	@GetMapping("/message")
+	public String getMessage() {
+		return "I'm using SSL with this keystore: " + env.getProperty("spring.data.gemfire.security.ssl.keystore");
+	}
+}
+// end::class[]

spring-geode-samples/boot/security/src/main/java/example/app/security/client/model/Customer.java

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+/*
+ * Copyright 2020 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 example.app.security.client.model;
+
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.NonNull;
+import lombok.RequiredArgsConstructor;
+import lombok.ToString;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.gemfire.mapping.annotation.Region;
+
+/**
+ * An Abstract Data Type (ADT) modeling a {@literal Customer}.
+ *
+ * @author John Blum
+ * @see Id
+ * @see Region
+ * @since 1.0.0
+ */
+// tag::class[]
+@Region("Customers")
+@EqualsAndHashCode
+@ToString(of = "name")
+@RequiredArgsConstructor(staticName = "newCustomer")
+public class Customer {
+
+	@Id @NonNull @Getter
+	private Long id;
+
+	@NonNull @Getter
+	private String name;
+
+}
+// end::class[]

spring-geode-samples/boot/security/src/main/java/example/app/security/server/BootGeodeSecurityServerApplication.java

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+/*
+ * Copyright 2020 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 example.app.security.server;
+
+import org.apache.geode.cache.server.CacheServer;
+import org.apache.geode.internal.security.shiro.GeodePermissionResolver;
+import org.apache.shiro.realm.text.PropertiesRealm;
+import org.springframework.boot.WebApplicationType;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.gemfire.config.annotation.CacheServerApplication;
+import org.springframework.data.gemfire.config.annotation.EnableSecurity;
+
+/**
+ * The {@link BootGeodeSecurityServerApplication} class is a Spring Boot, Apache Geode {@literal peer}
+ * {@link CacheServer} application serving cache clients.
+ *
+ * This Apache Geode peer member server configures security.
+ *
+ * @author Patrick Johnson
+ * @see org.apache.geode.cache.Cache
+ * @see org.apache.geode.cache.Region
+ * @see org.apache.geode.cache.server.CacheServer
+ * @see org.springframework.boot.autoconfigure.SpringBootApplication
+ * @see org.springframework.context.annotation.Bean
+ * @see org.springframework.data.gemfire.config.annotation.CacheServerApplication
+ * @since 1.3.0
+ */
+// tag::class[]
+@SpringBootApplication
+public class BootGeodeSecurityServerApplication {
+
+	public static void main(String[] args) {
+		new SpringApplicationBuilder(BootGeodeSecurityServerApplication.class)
+				.web(WebApplicationType.NONE)
+				.build()
+				.run(args);
+	}
+
+	@CacheServerApplication
+	@EnableSecurity
+	static class GeodeServerConfig {
+
+		// tag::realm[]
+		@Bean
+		PropertiesRealm shiroRealm() {
+
+			PropertiesRealm propertiesRealm = new PropertiesRealm();
+
+			propertiesRealm.setResourcePath("classpath:shiro.properties");
+			propertiesRealm.setPermissionResolver(new GeodePermissionResolver());
+
+			return propertiesRealm;
+		}
+		// end::realm[]
+	}
+}
+// end::class[]
+

spring-geode-samples/boot/security/src/main/resources/application.properties

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+# Spring Boot client application.properties
+
+spring.data.gemfire.security.ssl.keystore.password=s3cr3t
+spring.data.gemfire.security.username = jdoe
+spring.data.gemfire.security.password = p@55w0rd

spring-geode-samples/boot/security/src/main/resources/shiro.properties

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+# assign user jdoe the role fo viewer and give him DATA:WRITE permissions
+user.jdoe = p@55w0rd, viewer
+role.viewer = DATA:WRITE