DATAREDIS-1122 - Polishing.

Consistently use Maxlen lettercasing. Add since tags. Reformat code. Original pull request: spring-projects#523.

Author: mp911de

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

@@ -262,6 +262,7 @@ public ByteBufferRecord getRecord() {
  * Limit the size of the stream to the given maximum number of elements.
  *
  * @return can be {@literal null}.
+ * @since 2.3
  */
 @Nullable
 public Long getMaxlen() {
@@ -270,8 +271,9 @@ public Long getMaxlen() {
 
 /**
  * @return {@literal true} if {@literal MAXLEN} is set.
+ * @since 2.3
  */
-public boolean hasMaxLen() {
+public boolean hasMaxlen() {
 return maxlen != null && maxlen > 0;
 }
 }

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

@@ -113,7 +113,9 @@ default RecordId xAdd(MapRecord<byte[], byte[], byte[]> record) {
  */
 class XAddOptions {
 
-private @Nullable Long maxlen;
+private static final XAddOptions NONE = new XAddOptions(null);
+
+private final @Nullable Long maxlen;
 
 private XAddOptions(@Nullable Long maxlen) {
 this.maxlen = maxlen;
@@ -123,7 +125,7 @@ private XAddOptions(@Nullable Long maxlen) {
  * @return
  */
 public static XAddOptions none() {
-return new XAddOptions(null);
+return NONE;
 }
 
 /**
@@ -148,7 +150,7 @@ public Long getMaxlen() {
 /**
  * @return {@literal true} if {@literal MAXLEN} is set.
  */
-public boolean hasMaxLen() {
+public boolean hasMaxlen() {
 return maxlen != null && maxlen > 0;
 }
 

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

@@ -100,7 +100,7 @@ public Flux<CommandResponse<AddStreamRecord, RecordId>> xAdd(Publisher<AddStream
 if (!command.getRecord().getId().shouldBeAutoGenerated()) {
 args.id(command.getRecord().getId().getValue());
 }
-if(command.hasMaxLen()) {
+if (command.hasMaxlen()) {
 args.maxlen(command.getMaxlen());
 }
 

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

@@ -91,7 +91,7 @@ public RecordId xAdd(MapRecord<byte[], byte[], byte[]> record, XAddOptions optio
 
 XAddArgs args = new XAddArgs();
 args.id(record.getId().getValue());
-if(options.hasMaxLen()) {
+if (options.hasMaxlen()) {
 args.maxlen(options.getMaxlen());
 }