rredis (version 1.6.9)

redisBLPop: Blocking List Pop

Description

Pop the first available value from a key or list of keys, blocking until a value is available.

Usage

redisBLPop(keys, timeout = 0, ...)

Arguments

keys

A character key value or vector of key values to monitor.

timeout

A timeout in seconds after which, if no value is available, the function returns NULL. A value of zero indicates block indefinitely.

...

Optional additional arguments. Specify raw=TRUE to skip de-serialization of the data.

Value

• redisBLPop returns NULL after the timeout period, or a list containing:
• key
  The first key encountered with an available value,
• value
  The corresponding value.

Details

redisBLPop blocks until at least one of the keys exists and contains a non-empty value, or until the specified timeout period is reached, whichever comes first. Keys are scanned in the order that they are specified.

References

http://redis.io/commands

See Also

redisBRpop

Examples

redisConnect()
redisBLpop('x', 5)
redisLPush('x',runif(5))
redisBLPop('x')