Fetch the value associated with the key. If a value is found, then it is returned. If a value is not found, the block will be invoked and its return value (given that it is not nil) will be written to the cache.

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flush(delay = 0_u32) : Bool

Remove all keys from memcached.

Passing delay parameter postpone the removal.

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get(key : String) : String | Nil

Get single key value from memcached.

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get_multi(keys : Array(String)) : Hash(String, String | Nil)

Get multiple keys values from memcached.

If a key was not found or an error occured while getting the key, value for this key will be nil in the returned hash

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get_with_version(key : String) : Tuple(String, Int64) | Nil

Get single key value and its current version.

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increment(key : String, delta : Number, initial_value = 0, expire = 0) : Int64 | Nil

Increment key value by delta.

If key does not exist, it will be set to initial_value.

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prepend(key : String, value : String) : Bool

Prepend value before an existing key value

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set(key : String, value : String, expire : Number = 0, version : Number = 0) : Int64

Set key - value pair in memcached.

By default the key is set without expiration time. If you want to set TTL for the key, pass TTL in seconds as expire parameter If version parameter is provided, it will be compared to existing key version in memcached. If versions differ, Memcached::BadVersionException will be raised.

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touch(key : String, expire : Number) : Bool

Update key expiration time

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