Package org.infinispan.server.resp.commands.sortedset

Class ZADD

java.lang.Object

org.infinispan.server.resp.RespCommand

org.infinispan.server.resp.commands.sortedset.ZADD

All Implemented Interfaces:

Resp3Command

public class ZADD
extends RespCommand
implements Resp3Command

Adds all the specified members with the specified scores to the sorted set stored at key. It is possible to specify multiple score / member pairs. If a specified member is already a member of the sorted set, the score is updated and the element reinserted at the right position to ensure the correct ordering.

If key does not exist, a new sorted set with the specified members as sole members is created, like if the sorted set was empty. If the key exists but does not hold a sorted set, an error is returned.

Options:

• XX: Only update elements that already exist. Don't add new elements.
• NX: Only add new elements. Don't update already existing elements.
• LT: Only update existing elements if the new score is less than the current score. This flag doesn't prevent adding new elements.
• GT: Only update existing elements if the new score is greater than the current score. This flag doesn't prevent adding new elements.
• CH: Modify the return value from the number of new elements added, to the total number of elements changed. Changed elements are new elements added and elements already existing for which the score was updated. Normally the return value of ZADD only counts the number of new elements added.
• INCR: When this option is specified ZADD acts like ZINCRBY. Only one score-element pair can be specified in this mode.

Note: The GT, LT and NX options are mutually exclusive. The score values should be the string representation of a double precision floating point number. +inf and -inf values are valid values as well.

Since:

15.0

See Also:

• Redis Documentation

Field Summary

Fields

Modifier and Type	Field	Description
static final Set<String>	ARGUMENTS
static final String	CH
static final String	GT
static final String	INCR
static final String	LT
static final String	NX
static final String	XX

Fields inherited from class org.infinispan.server.resp.RespCommand

log

Constructor Summary

Constructors

Constructor	Description
ZADD()

Method Summary

Modifier and Type	Method	Description
CompletionStage<RespRequestHandler>	perform(Resp3Handler handler, io.netty.channel.ChannelHandlerContext ctx, List<byte[]> arguments)

Methods inherited from class org.infinispan.server.resp.RespCommand

extractKeys, fromByteBuf, getArity, getFirstKeyPos, getLastKeyPos, getName, getSteps, handleException, hasValidNumberOfArguments, match, size, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.infinispan.server.resp.commands.Resp3Command

handleException

Field Details

XX

public static final String XX

See Also:

• Constant Field Values

NX

public static final String NX

See Also:

• Constant Field Values

LT

public static final String LT

See Also:

• Constant Field Values

GT

public static final String GT

See Also:

• Constant Field Values

CH

public static final String CH

See Also:

• Constant Field Values

INCR

public static final String INCR

See Also:

• Constant Field Values

ARGUMENTS

public static final Set<String> ARGUMENTS

Constructor Details

ZADD

public ZADD()

Method Details

perform

public CompletionStage<RespRequestHandler> perform(Resp3Handler handler,
 io.netty.channel.ChannelHandlerContext ctx,
 List<byte[]> arguments)

Specified by:

perform in interface Resp3Command