Add sample for Redis metric exporter

spring-boot-samples/pom.xml

@@ -52,6 +52,7 @@
 		<module>spring-boot-sample-jta-bitronix</module>
 		<module>spring-boot-sample-jta-jndi</module>
 		<module>spring-boot-sample-liquibase</module>
+		<module>spring-boot-sample-metrics-redis</module>
 		<module>spring-boot-sample-parent-context</module>
 		<module>spring-boot-sample-profile</module>
 		<module>spring-boot-sample-secure</module>

spring-boot-samples/spring-boot-sample-metrics-redis/README.adoc

+Spring Boot sample with Redis export for metrics.
+
+Start redis, e.g. with [Docker Compose]()
+
+[source,indent=0]
+----
+	$ docker-compose up
+----
+
+Run the app and ping the home page (http://localhost:8080) a few times. Go and look at
+the result in Redis, e.g.
+
+[source,indent=0]
+----
+	$ redis-cli
+	127.0.0.1:6379> keys *
+	1) "keys.spring.metrics"
+	2) "spring.metrics.counter.status.200.root"
+	3) "spring.metrics.gauge.response.root"
+	127.0.0.1:6379> zrange keys.spring.metrics 0 0 WITHSCORES
+	1) "spring.metrics.counter.status.200.root"
+	2) "4"
+----
+

spring-boot-samples/spring-boot-sample-metrics-redis/docker-compose.yml

+redis:
+  image: redis
+  ports:
+    - "6379:6379"

spring-boot-samples/spring-boot-sample-metrics-redis/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<!-- Your own application should inherit from spring-boot-starter-parent -->
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-samples</artifactId>
+		<version>1.3.0.BUILD-SNAPSHOT</version>
+	</parent>
+	<artifactId>spring-boot-sample-metrics-redis</artifactId>
+	<name>spring-boot-sample-metrics-redis</name>
+	<description>Spring Boot Metrics Redis Sample</description>
+	<url>http://projects.spring.io/spring-boot/</url>
+	<organization>
+		<name>Pivotal Software, Inc.</name>
+		<url>http://www.spring.io</url>
+	</organization>
+	<properties>
+		<main.basedir>${basedir}/../..</main.basedir>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-redis</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+</project>

spring-boot-samples/spring-boot-sample-metrics-redis/src/main/java/sample/metrics/redis/ExportProperties.java

+/*
+ * Copyright 2012-2015 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 sample.metrics.redis;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+@ConfigurationProperties("metrics.export")
+class ExportProperties {
+
+	private String prefix = "spring.metrics";
+	private String key = "keys.spring.metrics";
+
+	public String getPrefix() {
+		return this.prefix;
+	}
+
+	public void setPrefix(String prefix) {
+		this.prefix = prefix;
+	}
+
+	public String getKey() {
+		return this.key;
+	}
+
+	public void setKey(String key) {
+		this.key = key;
+	}
+
+}
\ No newline at end of file

spring-boot-samples/spring-boot-sample-metrics-redis/src/main/java/sample/metrics/redis/HelloWorldService.java

+/*
+ * Copyright 2012-2015 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 sample.metrics.redis;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConfigurationProperties(prefix = "service", ignoreUnknownFields = false)
+public class HelloWorldService {
+
+	private String name = "World";
+
+	public String getName() {
+		return this.name;
+	}
+
+	public void setName(String name) {
+		this.name = name;
+	}
+
+	public String getHelloMessage() {
+		return "Hello " + this.name;
+	}
+
+}

spring-boot-samples/spring-boot-sample-metrics-redis/src/main/java/sample/metrics/redis/SampleController.java

+/*
+ * Copyright 2012-2015 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 sample.metrics.redis;
+
+import java.util.Collections;
+import java.util.Map;
+
+import org.hibernate.validator.constraints.NotBlank;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Description;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+@Description("A controller for handling requests for hello messages")
+public class SampleController {
+
+	@Autowired
+	private HelloWorldService helloWorldService;
+
+	@RequestMapping(value = "/", method = RequestMethod.GET)
+	@ResponseBody
+	public Map<String, String> hello() {
+		return Collections.singletonMap("message",
+				this.helloWorldService.getHelloMessage());
+	}
+
+	protected static class Message {
+
+		@NotBlank(message = "Message value cannot be empty")
+		private String value;
+
+		public String getValue() {
+			return this.value;
+		}
+
+		public void setValue(String value) {
+			this.value = value;
+		}
+	}
+
+}

spring-boot-samples/spring-boot-sample-metrics-redis/src/main/java/sample/metrics/redis/SampleRedisExportApplication.java

+/*
+ * Copyright 2012-2015 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 sample.metrics.redis;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.actuate.metrics.repository.redis.RedisMetricRepository;
+import org.springframework.boot.actuate.metrics.writer.MetricWriter;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.context.annotation.Bean;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+
+@SpringBootApplication
+@EnableConfigurationProperties(ExportProperties.class)
+public class SampleRedisExportApplication {
+
+	@Autowired
+	private ExportProperties export;
+
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(SampleRedisExportApplication.class, args);
+	}
+
+	@Bean
+	public MetricWriter redisMetricWriter(RedisConnectionFactory connectionFactory) {
+		return new RedisMetricRepository(connectionFactory, this.export.getPrefix(),
+				this.export.getKey());
+	}
+
+}

spring-boot-samples/spring-boot-sample-metrics-redis/src/main/resources/application.properties

+service.name: Phil
+metrics.export.prefix: ${spring.application.name:application}:${random.value:0000}
\ No newline at end of file

spring-boot-samples/spring-boot-sample-metrics-redis/src/test/java/sample/metrics/redis/SampleRedisExportApplicationTests.java

+/*
+ * Copyright 2012-2015 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 sample.metrics.redis;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.IntegrationTest;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+
+/**
+ * Basic integration tests for {@link SampleRedisExportApplication}.
+ *
+ * @author Dave Syer
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = SampleRedisExportApplication.class)
+@WebAppConfiguration
+@IntegrationTest("server.port=0")
+@DirtiesContext
+public class SampleRedisExportApplicationTests {
+
+	@Test
+	public void contextLoads() {
+
+	}
+
+}