DATAREDIS-930 - Return port/host of WithHostAndPort configurations using LettuceConnectionFactory.getPort() and getHost().

We now correctly return host and port from configurations that implement WithHostAndPort instead of always using RedisStandaloneConfiguration.

Original pull request: #385.

src/main/java/org/springframework/data/redis/connection/RedisConfiguration.java

@@ -18,6 +18,7 @@ package org.springframework.data.redis.connection;
 import java.util.Collections;
 import java.util.List;
 import java.util.Set;
+import java.util.function.IntSupplier;
 import java.util.function.Supplier;
 
 import org.springframework.lang.Nullable;
@@ -29,6 +30,7 @@ import org.springframework.util.Assert;
  * configurations for the individual purposes.
  *
  * @author Christoph Strobl
+ * @author Luis De Bello
  * @since 2.1
  */
 public interface RedisConfiguration {
@@ -85,6 +87,14 @@ public interface RedisConfiguration {
 		return configuration instanceof SentinelConfiguration;
 	}
 
+	/**
+	 * @param configuration can be {@literal null}.
+	 * @return {@code true} if given {@link RedisConfiguration} is instance of {@link WithHostAndPort}.
+	 */
+	static boolean isHostAndPortAware(@Nullable RedisConfiguration configuration) {
+		return configuration instanceof WithHostAndPort;
+	}
+
 	/**
 	 * @param configuration can be {@literal null}.
 	 * @return {@code true} if given {@link RedisConfiguration} is instance of {@link ClusterConfiguration}.
@@ -135,6 +145,32 @@ public interface RedisConfiguration {
 		return isPasswordAware(configuration) ? ((WithPassword) configuration).getPassword() : other.get();
 	}
 
+	/**
+	 * @param configuration can be {@literal null}.
+	 * @param other a {@code Supplier} whose result is returned if given {@link RedisConfiguration} is not
+	 *          {@link #isHostAndPortAware(RedisConfiguration) port aware}.
+	 * @return never {@literal null}.
+	 * @throws IllegalArgumentException if {@code other} is {@literal null}.
+	 */
+	static int getPortOrElse(@Nullable RedisConfiguration configuration, IntSupplier other) {
+
+		Assert.notNull(other, "Other must not be null!");
+		return isHostAndPortAware(configuration) ? ((WithHostAndPort) configuration).getPort() : other.getAsInt();
+	}
+
+	/**
+	 * @param configuration can be {@literal null}.
+	 * @param other a {@code Supplier} whose result is returned if given {@link RedisConfiguration} is not
+	 *          {@link #isHostAndPortAware(RedisConfiguration) host aware}.
+	 * @return never {@literal null}.
+	 * @throws IllegalArgumentException if {@code other} is {@literal null}.
+	 */
+	static String getHostOrElse(@Nullable RedisConfiguration configuration, Supplier<String> other) {
+
+		Assert.notNull(other, "Other must not be null!");
+		return isHostAndPortAware(configuration) ? ((WithHostAndPort) configuration).getHostName() : other.get();
+	}
+
 	/**
 	 * {@link RedisConfiguration} part suitable for configurations that may use authentication when connecting.
 	 *

src/main/java/org/springframework/data/redis/connection/lettuce/LettuceConnectionFactory.java

@@ -86,6 +86,7 @@ import org.springframework.util.ClassUtils;
  * @author Mark Paluch
  * @author Balázs Németh
  * @author Ruben Cervilla
+ * @author Luis De Bello
  */
 public class LettuceConnectionFactory
 		implements InitializingBean, DisposableBean, RedisConnectionFactory, ReactiveRedisConnectionFactory {
@@ -472,7 +473,7 @@ public class LettuceConnectionFactory
 	 * @return the host.
 	 */
 	public String getHostName() {
-		return standaloneConfig.getHostName();
+		return RedisConfiguration.getHostOrElse(configuration, standaloneConfig::getHostName);
 	}
 
 	/**
@@ -492,7 +493,7 @@ public class LettuceConnectionFactory
 	 * @return the port.
 	 */
 	public int getPort() {
-		return standaloneConfig.getPort();
+		return RedisConfiguration.getPortOrElse(configuration, standaloneConfig::getPort);
 	}
 
 	/**