Add support for flush modes using FLUSHDB and FLUSHALL commands.

Closes #2187
Original pull request: #2190.

src/test/java/org/springframework/data/redis/connection/ClusterConnectionTests.java

@@ -20,6 +20,7 @@ import org.springframework.data.geo.Point;
 /**
  * @author Christoph Strobl
  * @author Mark Paluch
+ * @author Dennis Neufeld
  */
 public interface ClusterConnectionTests {
 
@@ -123,9 +124,39 @@ public interface ClusterConnectionTests {
 	// DATAREDIS-315
 	void flushDbOnSingleNodeShouldFlushOnlyGivenNodesDb();
 
+	// GH-2187
+	void flushDbSyncOnSingleNodeShouldFlushOnlyGivenNodesDb();
+
+	// GH-2187
+	void flushDbAsyncOnSingleNodeShouldFlushOnlyGivenNodesDb();
+
 	// DATAREDIS-315
 	void flushDbShouldFlushAllClusterNodes();
 
+	// GH-2187
+	void flushDbSyncShouldFlushAllClusterNodes();
+
+	// GH-2187
+	void flushDbAsyncShouldFlushAllClusterNodes();
+
+	// GH-2187
+	void flushAllOnSingleNodeShouldFlushOnlyGivenNodesDb();
+
+	// GH-2187
+	void flushAllSyncOnSingleNodeShouldFlushOnlyGivenNodesDb();
+
+	// GH-2187
+	void flushAllAsyncOnSingleNodeShouldFlushOnlyGivenNodesDb();
+
+	// GH-2187
+	void flushAllShouldFlushAllClusterNodes();
+
+	// GH-2187
+	void flushAllSyncShouldFlushAllClusterNodes();
+
+	// GH-2187
+	void flushAllAsyncShouldFlushAllClusterNodes();
+
 	// DATAREDIS-438
 	void geoAddMultipleGeoLocations();
 

src/test/java/org/springframework/data/redis/connection/RedisConnectionUnitTests.java

@@ -47,6 +47,7 @@ import org.springframework.util.ObjectUtils;
  * @author David Liu
  * @author Ninad Divadkar
  * @author Mark Paluch
+ * @author Dennis Neufeld
  */
 class RedisConnectionUnitTests {
 
@@ -433,6 +434,10 @@ class RedisConnectionUnitTests {
 			delegate.flushDb();
 		}
 
+		public void flushDb(FlushOption option) {
+			delegate.flushDb(option);
+		}
+
 		public Boolean sIsMember(byte[] key, byte[] value) {
 			return delegate.sIsMember(key, value);
 		}
@@ -457,6 +462,10 @@ class RedisConnectionUnitTests {
 			delegate.flushAll();
 		}
 
+		public void flushAll(FlushOption option) {
+			delegate.flushAll(option);
+		}
+
 		public void lTrim(byte[] key, long begin, long end) {
 			delegate.lTrim(key, begin, end);
 		}

src/test/java/org/springframework/data/redis/connection/jedis/JedisClusterConnectionTests.java

@@ -61,6 +61,7 @@ import org.springframework.data.redis.connection.RedisClusterNode;
 import org.springframework.data.redis.connection.RedisClusterNode.SlotRange;
 import org.springframework.data.redis.connection.RedisGeoCommands.GeoLocation;
 import org.springframework.data.redis.connection.RedisNode;
+import org.springframework.data.redis.connection.RedisServerCommands.FlushOption;
 import org.springframework.data.redis.connection.RedisStringCommands.BitOperation;
 import org.springframework.data.redis.connection.RedisStringCommands.SetOption;
 import org.springframework.data.redis.connection.ReturnType;
@@ -79,6 +80,7 @@ import org.springframework.data.redis.test.util.HexStringUtils;
  * @author Christoph Strobl
  * @author Mark Paluch
  * @author Pavel Khokhlov
+ * @author Dennis Neufeld
  */
 @EnabledOnRedisClusterAvailable
 @ExtendWith(JedisExtension.class)
@@ -456,6 +458,30 @@ public class JedisClusterConnectionTests implements ClusterConnectionTests {
 		assertThat(nativeConnection.get(KEY_2)).isNull();
 	}
 
+	@Test // GH-2187
+	public void flushDbSyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushDbAsyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
 	@Test // DATAREDIS-315
 	public void flushDbShouldFlushAllClusterNodes() {
 
@@ -468,6 +494,102 @@ public class JedisClusterConnectionTests implements ClusterConnectionTests {
 		assertThat(nativeConnection.get(KEY_2)).isNull();
 	}
 
+	@Test // GH-2187
+	public void flushDbSyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushDbAsyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()));
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllSyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllAsyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll();
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllSyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllAsyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
 	@Test // DATAREDIS-438
 	public void geoAddMultipleGeoLocations() {
 		assertThat(clusterConnection.geoAdd(KEY_1_BYTES, Arrays.asList(PALERMO, ARIGENTO, CATANIA, PALERMO))).isEqualTo(3L);

src/test/java/org/springframework/data/redis/connection/lettuce/LettuceClusterConnectionTests.java

@@ -52,6 +52,7 @@ import org.springframework.data.redis.connection.*;
 import org.springframework.data.redis.connection.RedisClusterNode.SlotRange;
 import org.springframework.data.redis.connection.RedisGeoCommands.GeoLocation;
 import org.springframework.data.redis.connection.RedisListCommands.Position;
+import org.springframework.data.redis.connection.RedisServerCommands.FlushOption;
 import org.springframework.data.redis.connection.RedisStringCommands.BitOperation;
 import org.springframework.data.redis.connection.RedisStringCommands.SetOption;
 import org.springframework.data.redis.connection.ValueEncoding.RedisValueEncoding;
@@ -67,6 +68,7 @@ import org.springframework.data.redis.test.util.HexStringUtils;
 /**
  * @author Christoph Strobl
  * @author Mark Paluch
+ * @author Dennis Neufeld
  */
 @SuppressWarnings("deprecation")
 @EnabledOnRedisClusterAvailable
@@ -485,6 +487,30 @@ public class LettuceClusterConnectionTests implements ClusterConnectionTests {
 		assertThat(nativeConnection.get(KEY_2)).isNull();
 	}
 
+	@Test // GH-2187
+	public void flushDbSyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushDbAsyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
 	@Test // DATAREDIS-315
 	public void flushDbShouldFlushAllClusterNodes() {
 
@@ -497,6 +523,102 @@ public class LettuceClusterConnectionTests implements ClusterConnectionTests {
 		assertThat(nativeConnection.get(KEY_2)).isNull();
 	}
 
+	@Test // GH-2187
+	public void flushDbSyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushDbAsyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushDb(FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()));
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllSyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllAsyncOnSingleNodeShouldFlushOnlyGivenNodesDb() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(new RedisClusterNode("127.0.0.1", 7379, SlotRange.empty()), FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNotNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll();
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllSyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(FlushOption.SYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
+	@Test // GH-2187
+	public void flushAllAsyncShouldFlushAllClusterNodes() {
+
+		nativeConnection.set(KEY_1, VALUE_1);
+		nativeConnection.set(KEY_2, VALUE_2);
+
+		clusterConnection.flushAll(FlushOption.ASYNC);
+
+		assertThat(nativeConnection.get(KEY_1)).isNull();
+		assertThat(nativeConnection.get(KEY_2)).isNull();
+	}
+
 	@Test // DATAREDIS-438
 	public void geoAddMultipleGeoLocations() {
 		assertThat(clusterConnection.geoAdd(KEY_1_BYTES,

src/test/java/org/springframework/data/redis/connection/lettuce/LettuceReactiveClusterServerCommandsIntegrationTests.java

@@ -23,10 +23,12 @@ import reactor.test.StepVerifier;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.data.redis.connection.RedisClusterNode;
+import org.springframework.data.redis.connection.RedisServerCommands.FlushOption;
 
 /**
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Dennis Neufeld
  */
 class LettuceReactiveClusterServerCommandsIntegrationTests extends LettuceReactiveClusterTestSupport {
 
@@ -72,6 +74,46 @@ class LettuceReactiveClusterServerCommandsIntegrationTests extends LettuceReacti
 		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
 	}
 
+	@Test // GH-2187
+	void flushDbSyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushDb() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)) //
+				.then(connection.stringCommands().set(KEY_2_BBUFFER, VALUE_2_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(1L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushDb(NODE1, FlushOption.SYNC).as(StepVerifier::create) //
+				.expectNext("OK") //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(0L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+	}
+
+	@Test // GH-2187
+	void flushDbAsyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushDb() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)) //
+				.then(connection.stringCommands().set(KEY_2_BBUFFER, VALUE_2_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(1L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushDb(NODE1, FlushOption.ASYNC).as(StepVerifier::create) //
+				.expectNext("OK") //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(0L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+	}
+
 	@Test // DATAREDIS-659
 	void flushAllShouldRespondCorrectly() {
 
@@ -90,6 +132,46 @@ class LettuceReactiveClusterServerCommandsIntegrationTests extends LettuceReacti
 		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
 	}
 
+	@Test // GH-2187
+	void flushAllSyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushAll() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)) //
+				.then(connection.stringCommands().set(KEY_2_BBUFFER, VALUE_2_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(1L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushAll(NODE1, FlushOption.SYNC).as(StepVerifier::create) //
+				.expectNext("OK") //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(0L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+	}
+
+	@Test // GH-2187
+	void flushAllAsyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushAll() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)) //
+				.then(connection.stringCommands().set(KEY_2_BBUFFER, VALUE_2_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(1L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushAll(NODE1, FlushOption.ASYNC).as(StepVerifier::create) //
+				.expectNext("OK") //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize(NODE1).as(StepVerifier::create).expectNext(0L).verifyComplete();
+		connection.serverCommands().dbSize(NODE3).as(StepVerifier::create).expectNext(1L).verifyComplete();
+	}
+
 	@Test // DATAREDIS-659
 	void infoShouldRespondCorrectly() {
 

src/test/java/org/springframework/data/redis/connection/lettuce/LettuceReactiveServerCommandsIntegrationTests.java

@@ -20,11 +20,14 @@ import static org.assertj.core.api.Assumptions.*;
 
 import reactor.test.StepVerifier;
 
+import org.junit.jupiter.api.Disabled;
+import org.springframework.data.redis.connection.RedisServerCommands.FlushOption;
 import org.springframework.data.redis.test.extension.parametrized.ParameterizedRedisTest;
 
 /**
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Dennis Neufeld
  */
 public class LettuceReactiveServerCommandsIntegrationTests extends LettuceReactiveCommandsTestSupport {
 
@@ -70,6 +73,42 @@ public class LettuceReactiveServerCommandsIntegrationTests extends LettuceReacti
 		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(0L).verifyComplete();
 	}
 
+	@Disabled("Wait for https://github.com/lettuce-io/lettuce-core/pull/1908")
+	@ParameterizedRedisTest // GH-2187
+	void flushDbSyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushDb() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushDb(FlushOption.SYNC).as(StepVerifier::create) //
+				.expectNext("OK") //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(0L).verifyComplete();
+	}
+
+	@Disabled("Wait for https://github.com/lettuce-io/lettuce-core/pull/1908")
+	@ParameterizedRedisTest // GH-2187
+	void flushDbAsyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushDb() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushDb(FlushOption.ASYNC).as(StepVerifier::create) //
+				.expectNext("OK") //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(0L).verifyComplete();
+	}
+
 	@ParameterizedRedisTest // DATAREDIS-659
 	void flushAllShouldRespondCorrectly() {
 
@@ -85,6 +124,38 @@ public class LettuceReactiveServerCommandsIntegrationTests extends LettuceReacti
 		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(0L).verifyComplete();
 	}
 
+	@Disabled("Wait for https://github.com/lettuce-io/lettuce-core/pull/1908")
+	@ParameterizedRedisTest // GH-2187
+	void flushAllSyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushAll() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushAll(FlushOption.SYNC).as(StepVerifier::create).expectNext("OK").verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(0L).verifyComplete();
+	}
+
+	@Disabled("Wait for https://github.com/lettuce-io/lettuce-core/pull/1908")
+	@ParameterizedRedisTest // GH-2187
+	void flushAllAsyncShouldRespondCorrectly() {
+
+		connection.serverCommands().flushAll() //
+				.then(connection.stringCommands().set(KEY_1_BBUFFER, VALUE_1_BBUFFER)).as(StepVerifier::create) //
+				.expectNextCount(1) //
+				.verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(1L).verifyComplete();
+
+		connection.serverCommands().flushAll(FlushOption.ASYNC).as(StepVerifier::create).expectNext("OK").verifyComplete();
+
+		connection.serverCommands().dbSize().as(StepVerifier::create).expectNext(0L).verifyComplete();
+	}
+
 	@ParameterizedRedisTest // DATAREDIS-659
 	void infoShouldRespondCorrectly() {
 

src/test/java/org/springframework/data/redis/core/DefaultClusterOperationsUnitTests.java

@@ -37,6 +37,7 @@ import org.springframework.data.redis.connection.RedisClusterConnection;
 import org.springframework.data.redis.connection.RedisClusterNode;
 import org.springframework.data.redis.connection.RedisClusterNode.SlotRange;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.data.redis.connection.RedisServerCommands.FlushOption;
 import org.springframework.data.redis.connection.RedisServerCommands.MigrateOption;
 import org.springframework.data.redis.serializer.RedisSerializer;
 import org.springframework.data.redis.serializer.StringRedisSerializer;
@@ -44,6 +45,7 @@ import org.springframework.data.redis.serializer.StringRedisSerializer;
 /**
  * @author Christoph Strobl
  * @author Mark Paluch
+ * @author Dennis Neufeld
  */
 @ExtendWith(MockitoExtension.class)
 @MockitoSettings(strictness = Strictness.LENIENT)
@@ -208,6 +210,22 @@ class DefaultClusterOperationsUnitTests {
 		verify(connection, times(1)).flushDb(eq(NODE_1));
 	}
 
+	@Test // GH-2187
+	void flushDbSyncShouldDelegateToConnection() {
+
+		clusterOps.flushDb(NODE_1, FlushOption.SYNC);
+
+		verify(connection, times(1)).flushDb(eq(NODE_1), eq(FlushOption.SYNC));
+	}
+
+	@Test // GH-2187
+	void flushDbAsyncShouldDelegateToConnection() {
+
+		clusterOps.flushDb(NODE_1, FlushOption.ASYNC);
+
+		verify(connection, times(1)).flushDb(eq(NODE_1), eq(FlushOption.ASYNC));
+	}
+
 	@Test // DATAREDIS-315
 	void flushDbShouldThrowExceptionWhenNodeIsNull() {
 		assertThatIllegalArgumentException().isThrownBy(() -> clusterOps.flushDb(null));