Package org.springframework.data.redis.connection

Interface RedisStringCommands

All Known Subinterfaces:

DefaultedRedisClusterConnection, DefaultedRedisConnection, RedisClusterConnection, RedisCommands, RedisConnection, RedisConnectionUtils.RedisConnectionProxy, StringRedisConnection

All Known Implementing Classes:

AbstractRedisConnection, DefaultStringRedisConnection, JedisClusterConnection, JedisConnection, LettuceClusterConnection, LettuceConnection

public interface RedisStringCommands

String/Value-specific commands supported by Redis.

Author:

Costin Leau, Christoph Strobl, Mark Paluch

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static enum	RedisStringCommands.BitOperation
static enum	RedisStringCommands.SetOption	SET command arguments for NX, XX.

Method Summary

Modifier and Type	Method	Description
Long	append(byte[] key, byte[] value)	Append a value to key.
Long	bitCount(byte[] key)	Count the number of set bits (population counting) in value stored at key.
Long	bitCount(byte[] key, long start, long end)	Count the number of set bits (population counting) of value stored at key between start and end.
List<Long>	bitField(byte[] key, BitFieldSubCommands subCommands)	Get / Manipulate specific integer fields of varying bit widths and arbitrary non (necessary) aligned offset stored at a given key.
Long	bitOp(RedisStringCommands.BitOperation op, byte[] destination, byte[]... keys)	Perform bitwise operations between strings.
default Long	bitPos(byte[] key, boolean bit)	Return the position of the first bit set to given bit in a string.
Long	bitPos(byte[] key, boolean bit, Range<Long> range)	Return the position of the first bit set to given bit in a string.
Long	decr(byte[] key)	Decrement an integer value stored as string value of key by 1.
Long	decrBy(byte[] key, long value)	Decrement an integer value stored as string value of key by value.
byte[]	get(byte[] key)	Get the value of key.
Boolean	getBit(byte[] key, long offset)	Get the bit value at offset of value at key.
byte[]	getDel(byte[] key)	Return the value at key and delete the key.
byte[]	getEx(byte[] key, Expiration expiration)	Return the value at key and expire the key by applying Expiration.
byte[]	getRange(byte[] key, long start, long end)	Get a substring of value of key between start and end.
byte[]	getSet(byte[] key, byte[] value)	Set value of key and return its old value.
Long	incr(byte[] key)	Increment an integer value stored as string value of key by 1.
Double	incrBy(byte[] key, double value)	Increment a floating point number value of key by delta.
Long	incrBy(byte[] key, long value)	Increment an integer value stored of key by delta.
List<byte[]>	mGet(byte[]... keys)	Get multiple keys.
Boolean	mSet(Map<byte[],byte[]> tuple)	Set multiple keys to multiple values using key-value pairs provided in tuple.
Boolean	mSetNX(Map<byte[],byte[]> tuple)	Set multiple keys to multiple values using key-value pairs provided in tuple only if the provided key does not exist.
Boolean	pSetEx(byte[] key, long milliseconds, byte[] value)	Set the value and expiration in milliseconds for key.
Boolean	set(byte[] key, byte[] value)	Set value for key.
Boolean	set(byte[] key, byte[] value, Expiration expiration, RedisStringCommands.SetOption option)	Set value for key applying timeouts from expiration if set and inserting/updating values depending on option.
Boolean	setBit(byte[] key, long offset, boolean value)	Sets the bit at offset in value stored at key.
Boolean	setEx(byte[] key, long seconds, byte[] value)	Set the value and expiration in seconds for key.
Boolean	setNX(byte[] key, byte[] value)	Set value for key, only if key does not exist.
void	setRange(byte[] key, byte[] value, long offset)	Overwrite parts of key starting at the specified offset with given value.
Long	strLen(byte[] key)	Get the length of the value stored at key.

Method Details

get

@Nullable
byte[] get(byte[] key)

Get the value of key.

Parameters:

key - must not be null.

Returns:

null when key does not exist or used in pipeline / transaction.

See Also:

• Redis Documentation: GET

getDel

@Nullable
byte[] getDel(byte[] key)

Return the value at key and delete the key.

Parameters:

key - must not be null.

Returns:

null when key does not exist or used in pipeline / transaction.

Since:

2.6

See Also:

• Redis Documentation: GETDEL

getEx

@Nullable
byte[] getEx(byte[] key,
 Expiration expiration)

Return the value at key and expire the key by applying Expiration.

Use Expiration.seconds(long) for EX.
Use Expiration.milliseconds(long) for PX.
Use Expiration.unixTimestamp(long, TimeUnit) for EXAT | PXAT.

Parameters:

key - must not be null.

expiration - must not be null.

Returns:

null when key does not exist or used in pipeline / transaction.

Since:

2.6

See Also:

• Redis Documentation: GETEX

getSet

@Nullable
byte[] getSet(byte[] key,
 byte[] value)

Set value of key and return its old value.

Parameters:

key - must not be null.

value - must not be null.

Returns:

null if key did not exist before or when used in pipeline / transaction.

See Also:

• Redis Documentation: GETSET

mGet

@Nullable
List<byte[]> mGet(byte[]... keys)

Get multiple keys. Values are in the order of the requested keys Absent field values are represented using null in the resulting List.

Parameters:

keys - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: MGET

set

@Nullable
Boolean set(byte[] key,
 byte[] value)

Set value for key.

Parameters:

key - must not be null.

value - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: SET

set

@Nullable
Boolean set(byte[] key,
 byte[] value,
 Expiration expiration,
 RedisStringCommands.SetOption option)

Set value for key applying timeouts from expiration if set and inserting/updating values depending on option.

Parameters:

key - must not be null.

value - must not be null.

expiration - must not be null. Use Expiration.persistent() to not set any ttl or Expiration.keepTtl() to keep the existing expiration.

option - must not be null. Use RedisStringCommands.SetOption.upsert() to add non existing.

Returns:

null when used in pipeline / transaction.

Since:

1.7

See Also:

• Redis Documentation: SET

setNX

@Nullable
Boolean setNX(byte[] key,
 byte[] value)

Set value for key, only if key does not exist.

Parameters:

key - must not be null.

value - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: SETNX

setEx

@Nullable
Boolean setEx(byte[] key,
 long seconds,
 byte[] value)

Set the value and expiration in seconds for key.

Parameters:

key - must not be null.

seconds -

value - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: SETEX

pSetEx

@Nullable
Boolean pSetEx(byte[] key,
 long milliseconds,
 byte[] value)

Set the value and expiration in milliseconds for key.

Parameters:

key - must not be null.

milliseconds -

value - must not be null.

Returns:

null when used in pipeline / transaction.

Since:

1.3

See Also:

• Redis Documentation: PSETEX

mSet

@Nullable
Boolean mSet(Map<byte[],byte[]> tuple)

Set multiple keys to multiple values using key-value pairs provided in tuple.

Parameters:

tuple - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: MSET

mSetNX

@Nullable
Boolean mSetNX(Map<byte[],byte[]> tuple)

Set multiple keys to multiple values using key-value pairs provided in tuple only if the provided key does not exist.

Parameters:

tuple - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: MSETNX

incr

@Nullable
Long incr(byte[] key)

Increment an integer value stored as string value of key by 1.

Parameters:

key - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: INCR

incrBy

@Nullable
Long incrBy(byte[] key,
 long value)

Increment an integer value stored of key by delta.

Parameters:

key - must not be null.

value -

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: INCRBY

incrBy

@Nullable
Double incrBy(byte[] key,
 double value)

Increment a floating point number value of key by delta.

Parameters:

key - must not be null.

value -

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: INCRBYFLOAT

decr

@Nullable
Long decr(byte[] key)

Decrement an integer value stored as string value of key by 1.

Parameters:

key - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: DECR

decrBy

@Nullable
Long decrBy(byte[] key,
 long value)

Decrement an integer value stored as string value of key by value.

Parameters:

key - must not be null.

value -

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: DECRBY

append

@Nullable
Long append(byte[] key,
 byte[] value)

Append a value to key.

Parameters:

key - must not be null.

value - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: APPEND

getRange

@Nullable
byte[] getRange(byte[] key,
 long start,
 long end)

Get a substring of value of key between start and end.

Parameters:

key - must not be null.

start -

end -

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: GETRANGE

setRange

void setRange(byte[] key,
 byte[] value,
 long offset)

Overwrite parts of key starting at the specified offset with given value.

Parameters:

key - must not be null.

value -

offset -

See Also:

• Redis Documentation: SETRANGE

getBit

@Nullable
Boolean getBit(byte[] key,
 long offset)

Get the bit value at offset of value at key.

Parameters:

key - must not be null.

offset -

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: GETBIT

setBit

@Nullable
Boolean setBit(byte[] key,
 long offset,
 boolean value)

Sets the bit at offset in value stored at key.

Parameters:

key - must not be null.

offset -

value -

Returns:

the original bit value stored at offset or null when used in pipeline / transaction.

See Also:

• Redis Documentation: SETBIT

bitCount

@Nullable
Long bitCount(byte[] key)

Count the number of set bits (population counting) in value stored at key.

Parameters:

key - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: BITCOUNT

bitCount

@Nullable
Long bitCount(byte[] key,
 long start,
 long end)

Count the number of set bits (population counting) of value stored at key between start and end.

Parameters:

key - must not be null.

start -

end -

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: BITCOUNT

bitField

@Nullable
List<Long> bitField(byte[] key,
 BitFieldSubCommands subCommands)

Get / Manipulate specific integer fields of varying bit widths and arbitrary non (necessary) aligned offset stored at a given key.

Parameters:

key - must not be null.

subCommands - must not be null.

Returns:

null when used in pipeline / transaction.

Since:

2.1

bitOp

@Nullable
Long bitOp(RedisStringCommands.BitOperation op,
 byte[] destination,
 byte[]... keys)

Perform bitwise operations between strings.

Parameters:

op - must not be null.

destination - must not be null.

keys - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: BITOP

bitPos

@Nullable
default Long bitPos(byte[] key,
 boolean bit)

Return the position of the first bit set to given bit in a string.

Parameters:

key - the key holding the actual String.

bit - the bit value to look for.

Returns:

null when used in pipeline / transaction. The position of the first bit set to 1 or 0 according to the request.

Since:

2.1

See Also:

• Redis Documentation: BITPOS

bitPos

@Nullable
Long bitPos(byte[] key,
 boolean bit,
 Range<Long> range)

Return the position of the first bit set to given bit in a string. Range start and end can contain negative values in order to index bytes starting from the end of the string, where -1 is the last byte, -2 is the penultimate.

Parameters:

key - the key holding the actual String.

bit - the bit value to look for.

range - must not be null. Use Range.unbounded() to not limit search.

Returns:

null when used in pipeline / transaction. The position of the first bit set to 1 or 0 according to the request.

Since:

2.1

See Also:

• Redis Documentation: BITPOS

strLen

@Nullable
Long strLen(byte[] key)

Get the length of the value stored at key.

Parameters:

key - must not be null.

Returns:

null when used in pipeline / transaction.

See Also:

• Redis Documentation: STRLEN