Use Redis client configuration to configure connection factories

We now use LettuceClientConfiguration and JedisClientConfiguration to
configure connection factories. Client-specific configuration can be
customized by providing LettuceClientConfigurationBuilderCustomizer and
JedisClientConfigurationBuilderCustomizer beans.

See gh-9510, gh-8894, gh-9490

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/JedisClientConfigurationBuilderCustomizer.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2012-2017 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 org.springframework.boot.autoconfigure.data.redis;
+
+import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
+import org.springframework.data.redis.connection.jedis.JedisClientConfiguration.JedisClientConfigurationBuilder;
+
+/**
+ * Callback interface that can be implemented by beans wishing to customize the
+ * {@link JedisClientConfiguration} via a {@link JedisClientConfigurationBuilder
+ * JedisClientConfiguration.JedisClientConfigurationBuilder} whilst retaining default
+ * auto-configuration.
+ *
+ * @author Mark Paluch
+ * @since 2.0.0
+ */
+@FunctionalInterface
+public interface JedisClientConfigurationBuilderCustomizer {
+
+	/**
+	 * Customize the {@link JedisClientConfigurationBuilder}.
+	 * @param clientConfigurationBuilder the builder to customize
+	 */
+	void customize(JedisClientConfigurationBuilder clientConfigurationBuilder);
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/JedisConnectionConfiguration.java

@@ -17,6 +17,9 @@
 package org.springframework.boot.autoconfigure.data.redis;
 
 import java.net.UnknownHostException;
+import java.time.Duration;
+import java.util.Collections;
+import java.util.List;
 
 import org.apache.commons.pool2.impl.GenericObjectPool;
 import redis.clients.jedis.Jedis;
@@ -30,6 +33,9 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.data.redis.connection.RedisClusterConfiguration;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
 import org.springframework.data.redis.connection.RedisSentinelConfiguration;
+import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
+import org.springframework.data.redis.connection.jedis.JedisClientConfiguration;
+import org.springframework.data.redis.connection.jedis.JedisClientConfiguration.JedisClientConfigurationBuilder;
 import org.springframework.data.redis.connection.jedis.JedisConnection;
 import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
 import org.springframework.util.StringUtils;
@@ -46,66 +52,70 @@ class JedisConnectionConfiguration extends RedisConnectionConfiguration {
 
 	private final RedisProperties properties;
 
+	private final List<JedisClientConfigurationBuilderCustomizer> builderCustomizers;
+
 	JedisConnectionConfiguration(RedisProperties properties,
+			ObjectProvider<RedisStandaloneConfiguration> standaloneConfiguration,
 			ObjectProvider<RedisSentinelConfiguration> sentinelConfiguration,
-			ObjectProvider<RedisClusterConfiguration> clusterConfiguration) {
-		super(properties, sentinelConfiguration, clusterConfiguration);
+			ObjectProvider<RedisClusterConfiguration> clusterConfiguration,
+			ObjectProvider<List<JedisClientConfigurationBuilderCustomizer>> builderCustomizers) {
+		super(properties, standaloneConfiguration, sentinelConfiguration,
+				clusterConfiguration);
 		this.properties = properties;
+		this.builderCustomizers = builderCustomizers
+				.getIfAvailable(Collections::emptyList);
 	}
 
 	@Bean
 	@ConditionalOnMissingBean(RedisConnectionFactory.class)
 	public JedisConnectionFactory redisConnectionFactory() throws UnknownHostException {
-		return applyProperties(createJedisConnectionFactory());
-	}
-
-	private JedisConnectionFactory applyProperties(JedisConnectionFactory factory) {
-		configureConnection(factory);
-		if (this.properties.isSsl()) {
-			factory.setUseSsl(true);
-		}
-		factory.setDatabase(this.properties.getDatabase());
-		if (this.properties.getTimeout() > 0) {
-			factory.setTimeout(this.properties.getTimeout());
-		}
-		return factory;
-	}
-
-	private void configureConnection(JedisConnectionFactory factory) {
-		if (StringUtils.hasText(this.properties.getUrl())) {
-			configureConnectionFromUrl(factory);
-		}
-		else {
-			factory.setHostName(this.properties.getHost());
-			factory.setPort(this.properties.getPort());
-			if (this.properties.getPassword() != null) {
-				factory.setPassword(this.properties.getPassword());
-			}
-		}
-	}
-
-	private void configureConnectionFromUrl(JedisConnectionFactory factory) {
-		ConnectionInfo connectionInfo = parseUrl(this.properties.getUrl());
-		factory.setUseSsl(connectionInfo.isUseSsl());
-		factory.setHostName(connectionInfo.getHostName());
-		factory.setPort(connectionInfo.getPort());
-		if (connectionInfo.getPassword() != null) {
-			factory.setPassword(connectionInfo.getPassword());
-		}
+		return createJedisConnectionFactory();
 	}
 
 	private JedisConnectionFactory createJedisConnectionFactory() {
-		RedisProperties.Pool pool = this.properties.getJedis().getPool();
-		JedisPoolConfig poolConfig = pool != null ? jedisPoolConfig(pool)
-				: new JedisPoolConfig();
+		JedisClientConfiguration clientConfiguration = getJedisClientConfiguration();
 
 		if (getSentinelConfig() != null) {
-			return new JedisConnectionFactory(getSentinelConfig(), poolConfig);
+			return new JedisConnectionFactory(getSentinelConfig(), clientConfiguration);
 		}
+
 		if (getClusterConfiguration() != null) {
-			return new JedisConnectionFactory(getClusterConfiguration(), poolConfig);
+			return new JedisConnectionFactory(getClusterConfiguration(),
+					clientConfiguration);
 		}
-		return new JedisConnectionFactory(poolConfig);
+
+		return new JedisConnectionFactory(getStandaloneConfig(), clientConfiguration);
+	}
+
+	private JedisClientConfiguration getJedisClientConfiguration() {
+		JedisClientConfigurationBuilder builder = applyProperties(
+				JedisClientConfiguration.builder());
+		RedisProperties.Pool pool = this.properties.getJedis().getPool();
+		if (pool != null) {
+			applyPooling(pool, builder);
+		}
+		if (StringUtils.hasText(this.properties.getUrl())) {
+			customizeConfigurationFromUrl(builder);
+		}
+		customize(builder);
+		return builder.build();
+	}
+
+	private JedisClientConfigurationBuilder applyProperties(
+			JedisClientConfigurationBuilder builder) {
+		if (this.properties.isSsl()) {
+			builder.useSsl();
+		}
+		if (this.properties.getTimeout() != 0) {
+			Duration timeout = Duration.ofMillis(this.properties.getTimeout());
+			builder.readTimeout(timeout).connectTimeout(timeout);
+		}
+		return builder;
+	}
+
+	private void applyPooling(RedisProperties.Pool pool,
+			JedisClientConfiguration.JedisClientConfigurationBuilder builder) {
+		builder.usePooling().poolConfig(jedisPoolConfig(pool));
 	}
 
 	private JedisPoolConfig jedisPoolConfig(RedisProperties.Pool pool) {
@@ -117,4 +127,19 @@ class JedisConnectionConfiguration extends RedisConnectionConfiguration {
 		return config;
 	}
 
+	private void customizeConfigurationFromUrl(
+			JedisClientConfiguration.JedisClientConfigurationBuilder builder) {
+		ConnectionInfo connectionInfo = parseUrl(this.properties.getUrl());
+		if (connectionInfo.isUseSsl()) {
+			builder.useSsl();
+		}
+	}
+
+	private void customize(
+			JedisClientConfiguration.JedisClientConfigurationBuilder builder) {
+		for (JedisClientConfigurationBuilderCustomizer customizer : this.builderCustomizers) {
+			customizer.customize(builder);
+		}
+	}
+
 }

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/LettuceClientConfigurationBuilderCustomizer.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2012-2017 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 org.springframework.boot.autoconfigure.data.redis;
+
+import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration;
+import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration.LettuceClientConfigurationBuilder;
+
+/**
+ * Callback interface that can be implemented by beans wishing to customize the
+ * {@link LettuceClientConfiguration} via a {@link LettuceClientConfigurationBuilder
+ * LettuceClientConfiguration.LettuceClientConfigurationBuilder} whilst retaining default
+ * auto-configuration.
+ *
+ * @author Mark Paluch
+ * @since 2.0.0
+ */
+@FunctionalInterface
+public interface LettuceClientConfigurationBuilderCustomizer {
+
+	/**
+	 * Customize the {@link LettuceClientConfigurationBuilder}.
+	 * @param clientConfigurationBuilder the builder to customize
+	 */
+	void customize(LettuceClientConfigurationBuilder clientConfigurationBuilder);
+
+}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/LettuceConnectionConfiguration.java

@@ -17,6 +17,9 @@
 package org.springframework.boot.autoconfigure.data.redis;
 
 import java.net.UnknownHostException;
+import java.time.Duration;
+import java.util.Collections;
+import java.util.List;
 
 import io.lettuce.core.RedisClient;
 import io.lettuce.core.cluster.RedisClusterClient;
@@ -33,7 +36,10 @@ import org.springframework.context.annotation.Configuration;
 import org.springframework.data.redis.connection.RedisClusterConfiguration;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
 import org.springframework.data.redis.connection.RedisSentinelConfiguration;
+import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
 import org.springframework.data.redis.connection.lettuce.DefaultLettucePool;
+import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration;
+import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration.LettuceClientConfigurationBuilder;
 import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
 import org.springframework.util.StringUtils;
 
@@ -49,11 +55,18 @@ class LettuceConnectionConfiguration extends RedisConnectionConfiguration {
 
 	private final RedisProperties properties;
 
+	private final List<LettuceClientConfigurationBuilderCustomizer> builderCustomizers;
+
 	LettuceConnectionConfiguration(RedisProperties properties,
+			ObjectProvider<RedisStandaloneConfiguration> standaloneConfiguration,
 			ObjectProvider<RedisSentinelConfiguration> sentinelConfigurationProvider,
-			ObjectProvider<RedisClusterConfiguration> clusterConfigurationProvider) {
-		super(properties, sentinelConfigurationProvider, clusterConfigurationProvider);
+			ObjectProvider<RedisClusterConfiguration> clusterConfigurationProvider,
+			ObjectProvider<List<LettuceClientConfigurationBuilderCustomizer>> builderCustomizers) {
+		super(properties, standaloneConfiguration, sentinelConfigurationProvider,
+				clusterConfigurationProvider);
 		this.properties = properties;
+		this.builderCustomizers = builderCustomizers
+				.getIfAvailable(Collections::emptyList);
 	}
 
 	@Bean(destroyMethod = "shutdown")
@@ -66,52 +79,26 @@ class LettuceConnectionConfiguration extends RedisConnectionConfiguration {
 	@ConditionalOnMissingBean(RedisConnectionFactory.class)
 	public LettuceConnectionFactory redisConnectionFactory(
 			ClientResources clientResources) throws UnknownHostException {
-		return applyProperties(createLettuceConnectionFactory(clientResources));
+		if (this.properties.getLettuce().getPool() != null) {
+			return createLettuceConnectionFactory(clientResources);
+		}
+		return createLettuceConnectionFactory(
+				getLettuceClientConfiguration(clientResources));
 	}
 
-	private LettuceConnectionFactory applyProperties(LettuceConnectionFactory factory) {
-		configureConnection(factory);
-		if (this.properties.isSsl()) {
-			factory.setUseSsl(true);
-		}
-		if (this.properties.getLettuce() != null) {
-			RedisProperties.Lettuce lettuce = this.properties.getLettuce();
-			if (lettuce.getShutdownTimeout() >= 0) {
-				factory.setShutdownTimeout(
-						this.properties.getLettuce().getShutdownTimeout());
-			}
-		}
-		return factory;
+	private LettuceConnectionFactory createLettuceConnectionFactory(
+			ClientResources clientResources) {
+		return new LettuceConnectionFactory(applyProperties(createLettucePool(),
+				this.properties.getLettuce().getPool(), clientResources));
 	}
 
-	private void configureConnection(LettuceConnectionFactory factory) {
-		if (StringUtils.hasText(this.properties.getUrl())) {
-			configureConnectionFromUrl(factory);
-		}
-		else {
-			factory.setHostName(this.properties.getHost());
-			factory.setPort(this.properties.getPort());
-			if (this.properties.getPassword() != null) {
-				factory.setPassword(this.properties.getPassword());
-			}
-			factory.setDatabase(this.properties.getDatabase());
-			if (this.properties.getTimeout() > 0) {
-				factory.setTimeout(this.properties.getTimeout());
-			}
-		}
+	private DefaultLettucePool createLettucePool() {
+		return getSentinelConfig() != null ? new DefaultLettucePool(getSentinelConfig())
+				: new DefaultLettucePool();
 	}
 
-	private void configureConnectionFromUrl(LettuceConnectionFactory factory) {
-		ConnectionInfo connectionInfo = parseUrl(this.properties.getUrl());
-		factory.setUseSsl(connectionInfo.isUseSsl());
-		factory.setHostName(connectionInfo.getHostName());
-		factory.setPort(connectionInfo.getPort());
-		if (connectionInfo.getPassword() != null) {
-			factory.setPassword(connectionInfo.getPassword());
-		}
-	}
-
-	private DefaultLettucePool applyProperties(DefaultLettucePool pool) {
+	private DefaultLettucePool applyProperties(DefaultLettucePool pool,
+			RedisProperties.Pool properties, ClientResources clientResources) {
 		if (StringUtils.hasText(this.properties.getUrl())) {
 			configureConnectionFromUrl(pool);
 		}
@@ -126,6 +113,8 @@ class LettuceConnectionConfiguration extends RedisConnectionConfiguration {
 		if (this.properties.getTimeout() > 0) {
 			pool.setTimeout(this.properties.getTimeout());
 		}
+		pool.setPoolConfig(lettucePoolConfig(properties));
+		pool.setClientResources(clientResources);
 		pool.afterPropertiesSet();
 		return pool;
 	}
@@ -139,53 +128,7 @@ class LettuceConnectionConfiguration extends RedisConnectionConfiguration {
 		}
 	}
 
-	private LettuceConnectionFactory createLettuceConnectionFactory(
-			ClientResources clientResources) {
-
-		if (getSentinelConfig() != null) {
-			if (this.properties.getLettuce() != null
-					&& this.properties.getLettuce().getPool() != null) {
-				DefaultLettucePool lettucePool = new DefaultLettucePool(
-						getSentinelConfig());
-				return new LettuceConnectionFactory(applyProperties(
-						applyClientResources(lettucePool, clientResources)));
-			}
-			return applyClientResources(new LettuceConnectionFactory(getSentinelConfig()),
-					clientResources);
-		}
-
-		if (getClusterConfiguration() != null) {
-			return applyClientResources(
-					new LettuceConnectionFactory(getClusterConfiguration()),
-					clientResources);
-		}
-
-		if (this.properties.getLettuce() != null
-				&& this.properties.getLettuce().getPool() != null) {
-			GenericObjectPoolConfig config = lettucePoolConfig(
-					this.properties.getLettuce().getPool());
-			DefaultLettucePool lettucePool = new DefaultLettucePool(
-					this.properties.getHost(), this.properties.getPort(), config);
-			return new LettuceConnectionFactory(
-					applyProperties(applyClientResources(lettucePool, clientResources)));
-		}
-
-		return applyClientResources(new LettuceConnectionFactory(), clientResources);
-	}
-
-	private DefaultLettucePool applyClientResources(DefaultLettucePool lettucePool,
-			ClientResources clientResources) {
-		lettucePool.setClientResources(clientResources);
-		return lettucePool;
-	}
-
-	private LettuceConnectionFactory applyClientResources(
-			LettuceConnectionFactory factory, ClientResources clientResources) {
-		factory.setClientResources(clientResources);
-		return factory;
-	}
-
-	private GenericObjectPoolConfig lettucePoolConfig(RedisProperties.Pool props) {
+	private static GenericObjectPoolConfig lettucePoolConfig(RedisProperties.Pool props) {
 		GenericObjectPoolConfig config = new GenericObjectPoolConfig();
 		config.setMaxTotal(props.getMaxActive());
 		config.setMaxIdle(props.getMaxIdle());
@@ -194,4 +137,64 @@ class LettuceConnectionConfiguration extends RedisConnectionConfiguration {
 		return config;
 	}
 
+	private LettuceConnectionFactory createLettuceConnectionFactory(
+			LettuceClientConfiguration clientConfiguration) {
+
+		if (getSentinelConfig() != null) {
+			return new LettuceConnectionFactory(getSentinelConfig(), clientConfiguration);
+		}
+
+		if (getClusterConfiguration() != null) {
+			return new LettuceConnectionFactory(getClusterConfiguration(),
+					clientConfiguration);
+		}
+
+		return new LettuceConnectionFactory(getStandaloneConfig(), clientConfiguration);
+	}
+
+	private LettuceClientConfiguration getLettuceClientConfiguration(
+			ClientResources clientResources) {
+		LettuceClientConfigurationBuilder builder = applyProperties(
+				LettuceClientConfiguration.builder());
+		if (StringUtils.hasText(this.properties.getUrl())) {
+			customizeConfigurationFromUrl(builder);
+		}
+		builder.clientResources(clientResources);
+		customize(builder);
+		return builder.build();
+	}
+
+	private LettuceClientConfigurationBuilder applyProperties(
+			LettuceClientConfiguration.LettuceClientConfigurationBuilder builder) {
+		if (this.properties.isSsl()) {
+			builder.useSsl();
+		}
+		if (this.properties.getTimeout() != 0) {
+			builder.commandTimeout(Duration.ofMillis(this.properties.getTimeout()));
+		}
+		if (this.properties.getLettuce() != null) {
+			RedisProperties.Lettuce lettuce = this.properties.getLettuce();
+			if (lettuce.getShutdownTimeout() >= 0) {
+				builder.shutdownTimeout(Duration
+						.ofSeconds(this.properties.getLettuce().getShutdownTimeout()));
+			}
+		}
+		return builder;
+	}
+
+	private void customizeConfigurationFromUrl(
+			LettuceClientConfiguration.LettuceClientConfigurationBuilder builder) {
+		ConnectionInfo connectionInfo = parseUrl(this.properties.getUrl());
+		if (connectionInfo.isUseSsl()) {
+			builder.useSsl();
+		}
+	}
+
+	private void customize(
+			LettuceClientConfiguration.LettuceClientConfigurationBuilder builder) {
+		for (LettuceClientConfigurationBuilderCustomizer customizer : this.builderCustomizers) {
+			customizer.customize(builder);
+		}
+	}
+
 }

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/data/redis/RedisConnectionConfiguration.java

@@ -24,7 +24,9 @@ import java.util.List;
 import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.data.redis.connection.RedisClusterConfiguration;
 import org.springframework.data.redis.connection.RedisNode;
+import org.springframework.data.redis.connection.RedisPassword;
 import org.springframework.data.redis.connection.RedisSentinelConfiguration;
+import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
 import org.springframework.util.Assert;
 import org.springframework.util.StringUtils;
 
@@ -38,18 +40,43 @@ abstract class RedisConnectionConfiguration {
 
 	private final RedisProperties properties;
 
+	private final RedisStandaloneConfiguration standaloneConfiguration;
+
 	private final RedisSentinelConfiguration sentinelConfiguration;
 
 	private final RedisClusterConfiguration clusterConfiguration;
 
 	protected RedisConnectionConfiguration(RedisProperties properties,
+			ObjectProvider<RedisStandaloneConfiguration> standaloneConfigurationProvider,
 			ObjectProvider<RedisSentinelConfiguration> sentinelConfigurationProvider,
 			ObjectProvider<RedisClusterConfiguration> clusterConfigurationProvider) {
 		this.properties = properties;
+		this.standaloneConfiguration = standaloneConfigurationProvider.getIfAvailable();
 		this.sentinelConfiguration = sentinelConfigurationProvider.getIfAvailable();
 		this.clusterConfiguration = clusterConfigurationProvider.getIfAvailable();
 	}
 
+	protected final RedisStandaloneConfiguration getStandaloneConfig() {
+		if (this.standaloneConfiguration != null) {
+			return this.standaloneConfiguration;
+		}
+		RedisStandaloneConfiguration config = new RedisStandaloneConfiguration();
+
+		if (StringUtils.hasText(this.properties.getUrl())) {
+			ConnectionInfo connectionInfo = parseUrl(this.properties.getUrl());
+			config.setHostName(connectionInfo.getHostName());
+			config.setPort(connectionInfo.getPort());
+			config.setPassword(RedisPassword.of(connectionInfo.getPassword()));
+		}
+		else {
+			config.setHostName(this.properties.getHost());
+			config.setPort(this.properties.getPort());
+			config.setPassword(RedisPassword.of(this.properties.getPassword()));
+		}
+		config.setDatabase(this.properties.getDatabase());
+		return config;
+	}
+
 	protected final RedisSentinelConfiguration getSentinelConfig() {
 		if (this.sentinelConfiguration != null) {
 			return this.sentinelConfiguration;

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/RedisAutoConfigurationJedisTests.java

@@ -28,6 +28,9 @@ import org.springframework.boot.test.util.TestPropertyValues;
 import org.springframework.boot.testsupport.runner.classpath.ClassPathExclusions;
 import org.springframework.boot.testsupport.runner.classpath.ModifiedClassPathRunner;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.redis.connection.jedis.JedisClientConfiguration.JedisClientConfigurationBuilder;
 import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
 import org.springframework.util.StringUtils;
 
@@ -62,6 +65,17 @@ public class RedisAutoConfigurationJedisTests {
 		assertThat(cf.isUseSsl()).isFalse();
 	}
 
+	@Test
+	public void testCustomizeRedisConfiguration() throws Exception {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.register(RedisAutoConfiguration.class);
+		ctx.register(CustomConfiguration.class);
+		ctx.refresh();
+
+		JedisConnectionFactory cf = ctx.getBean(JedisConnectionFactory.class);
+		assertThat(cf.isUseSsl()).isTrue();
+	}
+
 	@Test
 	public void testRedisUrlConfiguration() throws Exception {
 		load("spring.redis.host:foo",
@@ -172,4 +186,14 @@ public class RedisAutoConfigurationJedisTests {
 		}
 	}
 
+	@Configuration
+	static class CustomConfiguration {
+
+		@Bean
+		JedisClientConfigurationBuilderCustomizer customizer() {
+			return JedisClientConfigurationBuilder::useSsl;
+		}
+
+	}
+
 }

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/data/redis/RedisAutoConfigurationTests.java

@@ -28,7 +28,10 @@ import org.junit.Test;
 
 import org.springframework.boot.test.util.TestPropertyValues;
 import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
 import org.springframework.data.redis.connection.lettuce.DefaultLettucePool;
+import org.springframework.data.redis.connection.lettuce.LettuceClientConfiguration.LettuceClientConfigurationBuilder;
 import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
 import org.springframework.data.redis.core.RedisOperations;
 import org.springframework.data.redis.core.StringRedisTemplate;
@@ -78,6 +81,17 @@ public class RedisAutoConfigurationTests {
 		assertThat(cf.isUseSsl()).isFalse();
 	}
 
+	@Test
+	public void testCustomizeRedisConfiguration() {
+		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
+		ctx.register(RedisAutoConfiguration.class);
+		ctx.register(CustomConfiguration.class);
+		ctx.refresh();
+
+		LettuceConnectionFactory cf = ctx.getBean(LettuceConnectionFactory.class);
+		assertThat(cf.isUseSsl()).isTrue();
+	}
+
 	@Test
 	public void testRedisUrlConfiguration() throws Exception {
 		load("spring.redis.host:foo",
@@ -111,7 +125,6 @@ public class RedisAutoConfigurationTests {
 				"spring.redis.lettuce.pool.max-wait:2000");
 		LettuceConnectionFactory cf = this.context
 				.getBean(LettuceConnectionFactory.class);
-		assertThat(cf.getHostName()).isEqualTo("foo");
 		assertThat(getDefaultLettucePool(cf).getHostName()).isEqualTo("foo");
 		assertThat(getDefaultLettucePool(cf).getPoolConfig().getMinIdle()).isEqualTo(1);
 		assertThat(getDefaultLettucePool(cf).getPoolConfig().getMaxIdle()).isEqualTo(4);
@@ -197,4 +210,14 @@ public class RedisAutoConfigurationTests {
 		this.context = ctx;
 	}
 
+	@Configuration
+	static class CustomConfiguration {
+
+		@Bean
+		LettuceClientConfigurationBuilderCustomizer customizer() {
+			return LettuceClientConfigurationBuilder::useSsl;
+		}
+
+	}
+
 }