Polish.

Closes #2466

See #2465

Author: jxblum

src/main/java/org/springframework/data/redis/core/DefaultReactiveStreamOperations.java

@@ -20,7 +20,6 @@
 
 import java.nio.ByteBuffer;
 import java.nio.charset.StandardCharsets;
-import java.time.Duration;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.Map;
@@ -59,6 +58,8 @@
  *
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Marcin Zielinski
+ * @author John Blum
  * @since 2.2
  */
 class DefaultReactiveStreamOperations<K, HK, HV> implements ReactiveStreamOperations<K, HK, HV> {
@@ -156,20 +157,12 @@ public Mono<RecordId> add(Record<K, ?> record) {
 	 * @see org.springframework.data.redis.core.ReactiveStreamOperations#delete(java.lang.Object, java.lang.String[])
 	 */
 	@Override
-	public Flux<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, Duration minIdleTime,
-			RecordId... recordIds) {
+	public Flux<MapRecord<K, HK, HV>> claim(K key, String consumerGroup, String newOwner, XClaimOptions xClaimOptions) {
 
-		return createFlux(connection -> connection.xClaim(rawKey(key), group, newOwner, minIdleTime, recordIds)
+		return createFlux(connection -> connection.xClaim(rawKey(key), consumerGroup, newOwner, xClaimOptions)
 				.map(this::deserializeRecord));
 	}
 
-	@Override
-	public Flux<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, XClaimOptions xClaimOptions) {
-
-		return createFlux(
-				connection -> connection.xClaim(rawKey(key), group, newOwner, xClaimOptions).map(this::deserializeRecord));
-	}
-
 	@Override
 	public Mono<Long> delete(K key, RecordId... recordIds) {
 

src/main/java/org/springframework/data/redis/core/DefaultStreamOperations.java

@@ -16,7 +16,6 @@
 package org.springframework.data.redis.core;
 
 import java.nio.charset.StandardCharsets;
-import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -43,6 +42,7 @@
 import org.springframework.data.redis.connection.stream.StreamReadOptions;
 import org.springframework.data.redis.hash.HashMapper;
 import org.springframework.data.redis.serializer.RedisSerializer;
+import org.springframework.data.redis.support.collections.CollectionUtils;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
@@ -52,6 +52,8 @@
  *
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Marcin Zielinski
+ * @author John Blum
  * @since 2.2
  */
 class DefaultStreamOperations<K, HK, HV> extends AbstractOperations<K, Object> implements StreamOperations<K, HK, HV> {
@@ -147,32 +149,16 @@ public RecordId add(Record<K, ?> record) {
 	 * @see org.springframework.data.redis.core.StreamOperations#delete(java.lang.Object, java.lang.String[])
 	 */
 	@Override
-	public List<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, Duration minIdleTime,
-			RecordId... recordIds) {
-		byte[] rawKey = rawKey(key);
+	public List<MapRecord<K, HK, HV>> claim(K key, String consumerGroup, String newOwner, XClaimOptions xClaimOptions) {
 
-		return execute(new RecordDeserializingRedisCallback() {
+		return CollectionUtils.nullSafeList(execute(new RecordDeserializingRedisCallback() {
 
 			@Nullable
 			@Override
 			List<ByteRecord> inRedis(RedisConnection connection) {
-				return connection.streamCommands().xClaim(rawKey, group, newOwner, minIdleTime, recordIds);
+				return connection.streamCommands().xClaim(rawKey(key), consumerGroup, newOwner, xClaimOptions);
 			}
-		});
-	}
-
-	@Override
-	public List<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, XClaimOptions xClaimOptions) {
-		byte[] rawKey = rawKey(key);
-
-		return execute(new RecordDeserializingRedisCallback() {
-
-			@Nullable
-			@Override
-			List<ByteRecord> inRedis(RedisConnection connection) {
-				return connection.streamCommands().xClaim(rawKey, group, newOwner, xClaimOptions);
-			}
-		});
+		}));
 	}
 
 	@Override

src/main/java/org/springframework/data/redis/core/ReactiveStreamOperations.java

@@ -52,6 +52,8 @@
  * @author Mark Paluch
  * @author Christoph Strobl
  * @author Dengliming
+ * @author Marcin Zielinski
+ * @author John Blum
  * @since 2.2
  */
 public interface ReactiveStreamOperations<K, HK, HV> extends HashMapperProvider<HK, HV> {
@@ -139,33 +141,48 @@ default Mono<RecordId> add(MapRecord<K, ? extends HK, ? extends HV> record) {
 	Mono<RecordId> add(Record<K, ?> record);
 
 	/**
-	 * Changes the ownership of a pending message, so that the new owner is the consumer specified as the command argument.
-	 * The message is claimed only if its idle time is greater the minimum idle time specified when calling XCLAIM
+	 * Changes the ownership of a pending message so that the new owner is the consumer specified as
+	 * the command argument.
 	 *
-	 * @param key the stream key.
-	 * @param group name of the consumer group.
-	 * @param newOwner name of the consumer claiming the message.
-	 * @param minIdleTime idle time required for a message to be claimed.
-	 * @param recordIds record IDs to be claimed
+	 * The message is claimed only if its idle time (ms) is greater than the {@link Duration minimum idle time}
+	 * specified when calling {@literal XCLAIM}.
 	 *
-	 * @return the {@link Flux} of claimed MapRecords.
+	 * @param key {@link K key} to the steam.
+	 * @param consumerGroup {@link String name} of the consumer group.
+	 * @param newOwner {@link String name} of the consumer claiming the message.
+	 * @param minIdleTime {@link Duration minimum idle time} required for a message to be claimed.
+	 * @param recordIds {@link RecordId record IDs} to be claimed.
+	 * @return {@link Flux} of claimed {@link MapRecord MapRecords}.
 	 * @see <a href="https://redis.io/commands/xclaim/">Redis Documentation: XCLAIM</a>
+	 * @see org.springframework.data.redis.connection.stream.MapRecord
+	 * @see org.springframework.data.redis.connection.stream.RecordId
+	 * @see #claim(Object, String, String, XClaimOptions)
+	 * @see reactor.core.publisher.Flux
 	 */
-	Flux<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, Duration minIdleTime, RecordId... recordIds);
+	default Flux<MapRecord<K, HK, HV>> claim(K key, String consumerGroup, String newOwner, Duration minIdleTime,
+			RecordId... recordIds) {
+
+		return claim(key, consumerGroup, newOwner, XClaimOptions.minIdle(minIdleTime).ids(recordIds));
+	}
 
 	/**
-	 * Changes the ownership of a pending message, so that the new owner is the consumer specified as the command argument.
-	 * The message is claimed only if its idle time is greater the minimum idle time specified when calling XCLAIM
-	 *
-	 * @param key the stream key.
-	 * @param group name of the consumer group.
-	 * @param newOwner name of the consumer claiming the message.
-	 * @param xClaimOptions additional parameters for the CLAIM call.
+	 * Changes the ownership of a pending message so that the new owner is the consumer specified as
+	 * the command argument.
+
+	 * The message is claimed only if its idle time (ms) is greater than the given {@link Duration minimum idle time}
+	 * specified when calling {@literal XCLAIM}.
 	 *
-	 * @return the {@link Flux} of claimed MapRecords.
+	 * @param key {@link K key} to the steam.
+	 * @param consumerGroup {@link String name} of the consumer group.
+	 * @param newOwner {@link String name} of the consumer claiming the message.
+	 * @param xClaimOptions additional parameters for the {@literal CLAIM} call.
+	 * @return a {@link Flux} of claimed {@link MapRecord MapRecords}.
 	 * @see <a href="https://redis.io/commands/xclaim/">Redis Documentation: XCLAIM</a>
+	 * @see org.springframework.data.redis.connection.RedisStreamCommands.XClaimOptions
+	 * @see org.springframework.data.redis.connection.stream.MapRecord
+	 * @see reactor.core.publisher.Flux
 	 */
-	Flux<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, XClaimOptions xClaimOptions);
+	Flux<MapRecord<K, HK, HV>> claim(K key, String consumerGroup, String newOwner, XClaimOptions xClaimOptions);
 
 	/**
 	 * Removes the specified records from the stream. Returns the number of records deleted, that may be different from

src/main/java/org/springframework/data/redis/core/StreamOperations.java

@@ -51,6 +51,8 @@
  * @author Mark Paluch
  * @author Christoph Strobl
  * @author Dengliming
+ * @author Marcin Zielinski
+ * @author John Blum
  * @since 2.2
  */
 public interface StreamOperations<K, HK, HV> extends HashMapperProvider<HK, HV> {
@@ -133,33 +135,46 @@ default RecordId add(MapRecord<K, ? extends HK, ? extends HV> record) {
 	RecordId add(Record<K, ?> record);
 
 	/**
-	 * Changes the ownership of a pending message, so that the new owner is the consumer specified as the command argument.
-	 * The message is claimed only if its idle time is greater the minimum idle time specified when calling XCLAIM
+	 * Changes the ownership of a pending message so that the new owner is the consumer specified as
+	 * the command argument.
 	 *
-	 * @param key the stream key.
-	 * @param group name of the consumer group.
-	 * @param newOwner name of the consumer claiming the message.
-	 * @param minIdleTime idle time required for a message to be claimed.
-	 * @param recordIds record IDs to be claimed
+	 * The message is claimed only if its idle time (ms) is greater than the given {@link Duration minimum idle time}
+	 * specified when calling {@literal XCLAIM}.
 	 *
-	 * @return list of claimed MapRecords.
+	 * @param key {@link K key} to the steam.
+	 * @param consumerGroup {@link String name} of the consumer group.
+	 * @param newOwner {@link String name} of the consumer claiming the message.
+	 * @param minIdleTime {@link Duration minimum idle time} required for a message to be claimed.
+	 * @param recordIds {@link RecordId record IDs} to be claimed.
+	 * @return {@link List} of claimed {@link MapRecord MapRecords}.
 	 * @see <a href="https://redis.io/commands/xclaim/">Redis Documentation: XCLAIM</a>
+	 * @see org.springframework.data.redis.connection.stream.MapRecord
+	 * @see org.springframework.data.redis.connection.stream.RecordId
+	 * @see #claim(Object, String, String, XClaimOptions)
 	 */
-	List<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, Duration minIdleTime, RecordId... recordIds);
+	default List<MapRecord<K, HK, HV>> claim(K key, String consumerGroup, String newOwner, Duration minIdleTime,
+			RecordId... recordIds) {
+
+		return claim(key, consumerGroup, newOwner, XClaimOptions.minIdle(minIdleTime).ids(recordIds));
+	}
 
 	/**
-	 * Changes the ownership of a pending message, so that the new owner is the consumer specified as the command argument.
-	 * The message is claimed only if its idle time is greater the minimum idle time specified when calling XCLAIM
+	 * Changes the ownership of a pending message so that the new owner is the consumer specified as
+	 * the command argument.
 	 *
-	 * @param key the stream key.
-	 * @param group name of the consumer group.
-	 * @param newOwner name of the consumer claiming the message.
-	 * @param xClaimOptions additional parameters for the CLAIM call.
+	 * The message is claimed only if its idle time (ms) is greater than the given {@link Duration minimum idle time}
+	 * specified when calling {@literal XCLAIM}.
 	 *
-	 * @return list of claimed MapRecords.
+	 * @param key {@link K key} to the steam.
+	 * @param consumerGroup {@link String name} of the consumer group.
+	 * @param newOwner {@link String name} of the consumer claiming the message.
+	 * @param xClaimOptions additional parameters for the {@literal CLAIM} call.
+	 * @return {@link List} of claimed {@link MapRecord MapRecords}.
 	 * @see <a href="https://redis.io/commands/xclaim/">Redis Documentation: XCLAIM</a>
+	 * @see org.springframework.data.redis.connection.RedisStreamCommands.XClaimOptions
+	 * @see org.springframework.data.redis.connection.stream.MapRecord
 	 */
-	List<MapRecord<K, HK, HV>> claim(K key, String group, String newOwner, XClaimOptions xClaimOptions);
+	List<MapRecord<K, HK, HV>> claim(K key, String consumerGroup, String newOwner, XClaimOptions xClaimOptions);
 
 	/**
 	 * Removes the specified records from the stream. Returns the number of records deleted, that may be different from

src/main/java/org/springframework/data/redis/support/collections/CollectionUtils.java

@@ -18,18 +18,22 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.List;
 
 import org.springframework.dao.DataAccessException;
 import org.springframework.data.redis.core.RedisOperations;
 import org.springframework.data.redis.core.SessionCallback;
+import org.springframework.lang.NonNull;
+import org.springframework.lang.Nullable;
 
 /**
  * Utility class used mainly for type conversion by the default collection implementations. Meant for internal use.
  *
  * @author Costin Leau
+ * @author John Blum
  */
-abstract class CollectionUtils {
+public abstract class CollectionUtils {
 
 	@SuppressWarnings("unchecked")
 	static <E> Collection<E> reverse(Collection<? extends E> c) {
@@ -70,4 +74,9 @@ public Object execute(RedisOperations operations) throws DataAccessException {
 			}
 		});
 	}
+
+	@NonNull
+	public static <T> List<T> nullSafeList(@Nullable List<T> list) {
+		return list != null ? list : Collections.emptyList();
+	}
 }

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

@@ -59,7 +59,8 @@
  * Integration tests for {@link DefaultReactiveStreamOperations}.
  *
  * @author Mark Paluch
- * @auhtor Christoph Strobl
+ * @author Christoph Strobl
+ * @author Marcin Zielinski
  */
 @MethodSource("testParams")
 @SuppressWarnings("unchecked")
@@ -361,7 +362,7 @@ void pendingShouldReadMessageDetails() {
 
 	}
 
-	@ParameterizedRedisTest // https://github.com/spring-projects/spring-data-redis/issues/2465
+	@ParameterizedRedisTest // GH-2465
 	void claimShouldReadMessageDetails() {
 
 		K key = keyFactory.instance();

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

@@ -50,6 +50,7 @@
  *
  * @author Mark Paluch
  * @author Christoph Strobl
+ * @author Marcin Zielinski
  */
 @MethodSource("testParams")
 @EnabledOnCommand("XADD")
@@ -413,7 +414,7 @@ void pendingShouldReadMessageDetails() {
 		assertThat(pending.get(0).getTotalDeliveryCount()).isOne();
 	}
 
-	@ParameterizedRedisTest // https://github.com/spring-projects/spring-data-redis/issues/2465
+	@ParameterizedRedisTest // GH-2465
 	void claimShouldReadMessageDetails() {
 
 		K key = keyFactory.instance();