spring-projects#299 - Migrate Redis examples to Lettuce.

We now use Lettuce API instead of Jedis to align with Boot's driver choice.

redis/repositories/README.md

@@ -74,7 +74,7 @@ redis/src $ ./redis-cli keys *
 
 ## Configuration ##
 
-The below configuration uses [Jedis](https://github.com/xetorthio/jedis) to connect to Redis on its default port. Please note the usage of `@EnableRedisRepositories` to create `Repository` instances.
+The below configuration uses [Lettuce](https://github.com/lettuce-io/lettuce-core) to connect to Redis on its default port. Please note the usage of `@EnableRedisRepositories` to create `Repository` instances.
 
 ```java
 @Configuration
@@ -83,13 +83,13 @@ class AppConfig {
 
   @Bean
   RedisConnectionFactory connectionFactory() {
-    return new JedisConnectionFactory();
+    return new LettuceConnectionFactory();
   }
 
   @Bean
   RedisTemplate<?, ?> redisTemplate(RedisConnectionFactory connectionFactory) {
 
-    RedisTemplate<byte[], byte[]> template = new RedisTemplate<byte[], byte[]>();
+    RedisTemplate<byte[], byte[]> template = new RedisTemplate<>();
     template.setConnectionFactory(connectionFactory);
 
     return template;

redis/repositories/src/main/java/example/springdata/redis/repositories/ApplicationConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016 the original author or authors.
+ * Copyright 2016-2017 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.
@@ -18,26 +18,27 @@
 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.jedis.JedisConnectionFactory;
+import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.repository.configuration.EnableRedisRepositories;
 
 /**
  * @author Christoph Strobl
+ * @author Mark Paluch
  */
 @Configuration
 @EnableRedisRepositories
 public class ApplicationConfiguration {
 
 	@Bean
 	RedisConnectionFactory connectionFactory() {
-		return new JedisConnectionFactory();
+		return new LettuceConnectionFactory();
 	}
 
 	@Bean
 	RedisTemplate<?, ?> redisTemplate(RedisConnectionFactory connectionFactory) {
 
-		RedisTemplate<byte[], byte[]> template = new RedisTemplate<byte[], byte[]>();
+		RedisTemplate<byte[], byte[]> template = new RedisTemplate<>();
 		template.setConnectionFactory(connectionFactory);
 
 		return template;

redis/sentinel/README.md

@@ -15,7 +15,7 @@ public class RedisSentinelApplicationConfig {
 
 	@Bean
 	public RedisConnectionFactory connectionFactory() {
-		return new JedisConnectionFactory(sentinelConfig());
+		return new LettuceConnectionFactory(sentinelConfig(), LettuceClientConfiguration.defaultConfiguration());
 	}
 
 	@Bean

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

@@ -24,13 +24,15 @@
 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.lettuce.LettuceClientConfiguration;
 import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
 import org.springframework.data.redis.core.StringRedisTemplate;
 import org.springframework.util.StopWatch;
 
 /**
  * @author Christoph Strobl
  * @author Oliver Gierke
+ * @author Mark Paluch
  */
 @Configuration
 public class RedisSentinelApplication {
@@ -74,7 +76,7 @@ public static void main(String[] args) throws Exception {
 	}
 
 	public @Bean RedisConnectionFactory connectionFactory() {
-		return new LettuceConnectionFactory(sentinelConfig());
+		return new LettuceConnectionFactory(sentinelConfig(), LettuceClientConfiguration.defaultConfiguration());
 	}
 
 	public @Bean RedisSentinelConfiguration sentinelConfig() {

redis/util/pom.xml

@@ -20,8 +20,8 @@
 		</dependency>
 
 		<dependency>
-			<groupId>redis.clients</groupId>
-			<artifactId>jedis</artifactId>
+			<groupId>io.lettuce</groupId>
+			<artifactId>lettuce-core</artifactId>
 		</dependency>
 
 		<dependency>

redis/util/src/main/java/example/springdata/redis/test/util/ManagedClientResources.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 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.test.util;
+
+import io.lettuce.core.resource.ClientResources;
+import io.lettuce.core.resource.DefaultClientResources;
+
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Utility to keep track of a single {@link ClientResources} instance used from test rules to prevent costly
+ * creation/disposal of threading resources.
+ *
+ * @author Mark Paluch
+ */
+class ManagedClientResources {
+
+	private static final ManagedClientResources instance = new ManagedClientResources();
+
+	private final AtomicReference<ClientResources> clientResources = new AtomicReference<>();
+
+	/**
+	 * Obtain a managed instance of {@link ClientResources}. Allocates an instance if {@link ManagedClientResources} was
+	 * not initialized already.
+	 *
+	 * @return the {@link ClientResources}.
+	 */
+	static ClientResources getClientResources() {
+
+		AtomicReference<ClientResources> ref = instance.clientResources;
+
+		ClientResources clientResources = ref.get();
+		if (clientResources != null) {
+			return clientResources;
+		}
+
+		clientResources = DefaultClientResources.create();
+
+		if (ref.compareAndSet(null, clientResources)) {
+			return clientResources;
+		}
+
+		clientResources.shutdown(0, 0, TimeUnit.SECONDS);
+
+		return ref.get();
+	}
+
+}

redis/util/src/main/java/example/springdata/redis/test/util/RequiresRedisSentinel.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014 the original author or authors.
+ * 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.
@@ -15,17 +15,22 @@
  */
 package example.springdata.redis.test.util;
 
+import io.lettuce.core.RedisClient;
+import io.lettuce.core.RedisURI;
+import io.lettuce.core.api.StatefulRedisConnection;
+
+import java.time.Duration;
+
 import org.junit.internal.AssumptionViolatedException;
 import org.junit.rules.TestRule;
 import org.junit.runner.Description;
 import org.junit.runners.model.Statement;
 import org.springframework.data.redis.connection.RedisNode;
 import org.springframework.data.redis.connection.RedisSentinelConfiguration;
 
-import redis.clients.jedis.Jedis;
-
 /**
  * @author Christoph Strobl
+ * @author Mark Paluch
  */
 public class RequiresRedisSentinel implements TestRule {
 
@@ -44,8 +49,8 @@ protected RequiresRedisSentinel(RedisSentinelConfiguration config) {
 	}
 
 	/**
-	 * Create new {@link RedisSentinelRule} for given {@link RedisSentinelConfiguration}.
-	 * 
+	 * Create new {@link RequiresRedisSentinel} for given {@link RedisSentinelConfiguration}.
+	 *
 	 * @param config
 	 * @return
 	 */
@@ -54,8 +59,8 @@ public static RequiresRedisSentinel forConfig(RedisSentinelConfiguration config)
 	}
 
 	/**
-	 * Create new {@link RedisSentinelRule} using default configuration.
-	 * 
+	 * Create new {@link RequiresRedisSentinel} using default configuration.
+	 *
 	 * @return
 	 */
 	public static RequiresRedisSentinel withDefaultConfig() {
@@ -70,7 +75,7 @@ public RequiresRedisSentinel sentinelsDisabled() {
 
 	/**
 	 * Verifies all {@literal Sentinel} nodes are available.
-	 * 
+	 *
 	 * @return
 	 */
 	public RequiresRedisSentinel allActive() {
@@ -81,7 +86,7 @@ public RequiresRedisSentinel allActive() {
 
 	/**
 	 * Verifies at least one {@literal Sentinel} node is available.
-	 * 
+	 *
 	 * @return
 	 */
 	public RequiresRedisSentinel oneActive() {
@@ -93,7 +98,7 @@ public RequiresRedisSentinel oneActive() {
 	/**
 	 * Will only check {@link RedisSentinelConfiguration} configuration in case {@link RequiresRedisSentinel} is detected
 	 * on test method.
-	 * 
+	 *
 	 * @return
 	 */
 	public RequiresRedisSentinel dynamicModeSelection() {
@@ -138,9 +143,9 @@ private void verify(SentinelsAvailable verificationMode) {
 
 		if (failed > 0) {
 			if (SentinelsAvailable.ALL_ACTIVE.equals(verificationMode)) {
-				throw new AssumptionViolatedException(String.format(
-						"Expected all Redis Sentinels to respone but %s of %s did not responde", failed, sentinelConfig
-								.getSentinels().size()));
+				throw new AssumptionViolatedException(
+						String.format("Expected all Redis Sentinels to respone but %s of %s did not responde", failed,
+								sentinelConfig.getSentinels().size()));
 			}
 
 			if (SentinelsAvailable.ONE_ACTIVE.equals(verificationMode) && sentinelConfig.getSentinels().size() - 1 < failed) {
@@ -150,32 +155,23 @@ private void verify(SentinelsAvailable verificationMode) {
 		}
 
 		if (SentinelsAvailable.NONE_ACTIVE.equals(verificationMode) && failed != sentinelConfig.getSentinels().size()) {
-			throw new AssumptionViolatedException(String.format(
-					"Expected to have no sentinels online but found that %s are still alive.", (sentinelConfig.getSentinels()
-							.size() - failed)));
+			throw new AssumptionViolatedException(
+					String.format("Expected to have no sentinels online but found that %s are still alive.",
+							(sentinelConfig.getSentinels().size() - failed)));
 		}
 	}
 
 	private boolean isAvailable(RedisNode node) {
 
-		Jedis jedis = null;
+		RedisClient redisClient = RedisClient.create(ManagedClientResources.getClientResources(),
+				RedisURI.create(node.getHost(), node.getPort()));
 
-		try {
-			jedis = new Jedis(node.getHost(), node.getPort());
-			jedis.connect();
-			jedis.ping();
+		try (StatefulRedisConnection<String, String> connection = redisClient.connect()) {
+			connection.sync().ping();
 		} catch (Exception e) {
 			return false;
 		} finally {
-
-			if (jedis != null) {
-				try {
-					jedis.disconnect();
-					jedis.close();
-				} catch (Exception e) {
-					e.printStackTrace();
-				}
-			}
+			redisClient.shutdown(Duration.ZERO, Duration.ZERO);
 		}
 
 		return true;

redis/util/src/main/java/example/springdata/redis/test/util/RequiresRedisServer.java

@@ -15,14 +15,17 @@
  */
 package example.springdata.redis.test.util;
 
-import redis.clients.jedis.Jedis;
+import io.lettuce.core.RedisClient;
+import io.lettuce.core.RedisURI;
+import io.lettuce.core.api.StatefulRedisConnection;
 
 import java.net.InetSocketAddress;
 import java.net.Socket;
+import java.time.Duration;
 
 import org.junit.AssumptionViolatedException;
 import org.junit.rules.ExternalResource;
-import org.springframework.data.redis.connection.jedis.JedisConverters;
+import org.springframework.data.redis.connection.lettuce.LettuceConverters;
 import org.springframework.data.util.Version;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
@@ -107,16 +110,22 @@ protected void before() throws Throwable {
 			return;
 		}
 
-		try (Jedis jedis = new Jedis(host, port)) {
+		RedisClient redisClient = RedisClient.create(ManagedClientResources.getClientResources(),
+				RedisURI.create(host, port));
 
-			String infoServer = jedis.info("server");
-			String redisVersion = JedisConverters.stringToProps().convert(infoServer).getProperty("redis_version");
+		try (StatefulRedisConnection<String, String> connection = redisClient.connect()) {
+
+			String infoServer = connection.sync().info("server");
+			String redisVersion = LettuceConverters.stringToProps().convert(infoServer).getProperty("redis_version");
 			Version runningVersion = Version.parse(redisVersion);
 
 			if (runningVersion.isLessThan(requiredVersion)) {
 				throw new AssumptionViolatedException(String
 						.format("This test requires Redis version %s but you run version %s", requiredVersion, runningVersion));
 			}
+
+		} finally {
+			redisClient.shutdown(Duration.ZERO, Duration.ZERO);
 		}
 	}
 }