#166 - Rename Redis cluster-sentinel to sentinel.

Rename the Redis cluster-sentinel project to sentinel and leave a hint in the cluster-sentinel directory that points to the Redis Cluster and Redis Sentinel examples mentioning clarifying the cluster-sentinel naming.

redis/sentinel/README.md

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+# Spring Data Redis - Sentinel Examples
+
+This project contains samples of Sentinel specific features of Spring Data Redis.
+
+## Support for Sentinel
+
+```java
+@Configuration
+public class RedisSentinelApplicationConfig {
+
+	static final RedisSentinelConfiguration SENTINEL_CONFIG = new RedisSentinelConfiguration().master("mymaster") //
+			.sentinel("localhost", 26379) //
+			.sentinel("localhost", 26380) //
+			.sentinel("localhost", 26381);
+
+	@Bean
+	public RedisConnectionFactory connectionFactory() {
+		return new JedisConnectionFactory(sentinelConfig());
+	}
+
+	@Bean
+	public RedisSentinelConfiguration sentinelConfig() {
+		return SENTINEL_CONFIG;
+	}
+
+}
+```
+

redis/sentinel/pom.xml

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+<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>
+
+	<artifactId>spring-data-redis-sentinel-example</artifactId>
+	<name>Spring Data Redis - Sentinel Example</name>
+
+	<parent>
+		<groupId>org.springframework.data.examples</groupId>
+		<artifactId>spring-data-redis-examples</artifactId>
+		<version>1.0.0.BUILD-SNAPSHOT</version>
+		<relativePath>../pom.xml</relativePath>
+	</parent>
+
+	<dependencies>
+
+		<dependency>
+			<groupId>${project.groupId}</groupId>
+			<artifactId>spring-data-redis-example-utils</artifactId>
+			<version>${project.version}</version>
+			<scope>test</scope>
+		</dependency>
+
+	</dependencies>
+
+</project>

redis/sentinel/src/main/java/example/springdata/redis/sentinel/RedisSentinelApplication.java

@@ -0,0 +1,105 @@
+/*
+ * Copyright 2014-2017 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 example.springdata.redis.sentinel;
+
+import javax.annotation.PreDestroy;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringApplication;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.data.redis.connection.RedisSentinelConfiguration;
+import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
+import org.springframework.data.redis.core.StringRedisTemplate;
+import org.springframework.util.StopWatch;
+
+/**
+ * @author Christoph Strobl
+ * @author Oliver Gierke
+ */
+@Configuration
+public class RedisSentinelApplication {
+
+	static final RedisSentinelConfiguration SENTINEL_CONFIG = new RedisSentinelConfiguration().master("mymaster") //
+			.sentinel("localhost", 26379) //
+			.sentinel("localhost", 26380) //
+			.sentinel("localhost", 26381);
+
+	@Autowired RedisConnectionFactory factory;
+
+	public static void main(String[] args) throws Exception {
+
+		ApplicationContext context = SpringApplication.run(RedisSentinelApplication.class, args);
+
+		StringRedisTemplate template = context.getBean(StringRedisTemplate.class);
+		template.opsForValue().set("loop-forever", "0");
+
+		StopWatch stopWatch = new StopWatch();
+
+		while (true) {
+
+			try {
+
+				String value = "IT:= " + template.opsForValue().increment("loop-forever", 1);
+				printBackFromErrorStateInfoIfStopWatchIsRunning(stopWatch);
+				System.out.println(value);
+
+			} catch (RuntimeException e) {
+
+				System.err.println(e.getCause().getMessage());
+				startStopWatchIfNotRunning(stopWatch);
+			}
+
+			Thread.sleep(1000);
+		}
+	}
+
+	public @Bean StringRedisTemplate redisTemplate() {
+		return new StringRedisTemplate(connectionFactory());
+	}
+
+	public @Bean RedisConnectionFactory connectionFactory() {
+		return new JedisConnectionFactory(sentinelConfig());
+	}
+
+	public @Bean RedisSentinelConfiguration sentinelConfig() {
+		return SENTINEL_CONFIG;
+	}
+
+	/**
+	 * Clear database before shut down.
+	 */
+	public @PreDestroy void flushTestDb() {
+		factory.getConnection().flushDb();
+	}
+
+	private static void startStopWatchIfNotRunning(StopWatch stopWatch) {
+
+		if (!stopWatch.isRunning()) {
+			stopWatch.start();
+		}
+	}
+
+	private static void printBackFromErrorStateInfoIfStopWatchIsRunning(StopWatch stopWatch) {
+
+		if (stopWatch.isRunning()) {
+			stopWatch.stop();
+			System.err.println("INFO: Recovered after: " + stopWatch.getLastTaskInfo().getTimeSeconds());
+		}
+	}
+}

redis/sentinel/src/main/resources/application.properties

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+logging.level.root=INFO