Return the number of keys in the currently-selected database. @return the number of key in the curr currently-selected database.

Decrement the number stored at key by one. If the key does not exist or contains a value of a wrong type, set the key to the value of "0" before to pe

IDECRBY work just like {@link #decr(String) INCR} but instead to decrement by 1 the decrement is integer. <p> INCR commands are limited to 64 bit sign

Remove the specified keys. If a given key does not exist no operation is performed for this key. The command returns the number of keys removed. Time

Test if the specified keys exist. The command returns the number of keys exist. Time complexity: O(N) @param keys @return Integer reply, specifically:

Set a timeout on the specified key. After the timeout the key will be automatically deleted by the server. A key with an associated timeout is said to

EXPIREAT works exctly like {@link #expire(String, int) EXPIRE} but instead to get the number of seconds representing the Time To Live of the key as a

Splits String into host and port parts. String must be in ( host + ":" + port ) format. Port is optional @param from String to parse @return array of

Delete all the keys of all the existing databases, not just the currently selected one. @return a simple string reply (OK)

Delete all the keys of the currently selected DB. This command never fails. The time-complexity for this operation is O(N), N being the number of k

Get the value of the specified key. If the key does not exist null is returned. If the value stored at key is not a string an error is returned becaus

GETSET is an atomic set this value and return the old value command. Set key to the string value and return the old value stored at key. The string ca

Returns the bit value at offset in the string value stored at key @param key @param offset @return

Remove the specified field from an hash stored at key. <p> <b>Time complexity:</b> O(1) @param key @param fields @return If the field was present in t

Test for existence of a specified field in a hash. <b>Time complexity:</b> O(1) @param key @param field @return Return 1 if the hash stored at key con

If key holds a hash, retrieve the value associated to the specified field. <p> If the field is not found or the key does not exist, a special 'nil' va

Return all the fields and associated values in a hash. <p> <b>Time complexity:</b> O(N), where N is the total number of entries @param key @return All

Increment the number stored at field in the hash at key by value. If key does not exist, a new key holding a hash is created. If field does not exist

Increment the number stored at field in the hash at key by a double precision floating point value. If key does not exist, a new key holding a hash is

Return all the fields in a hash. <p> <b>Time complexity:</b> O(N), where N is the total number of entries @param key @return All the fields names cont

Return the number of items in a hash. <p> <b>Time complexity:</b> O(1) @param key @return The number of entries (fields) contained in the hash stored

Retrieve the values associated to the specified fields. <p> If some of the specified fields do not exist, nil values are returned. Non existing keys a

Set the respective fields to the respective values. HMSET replaces old values with new values. <p> If key does not exist, a new key holding a hash is

Set the specified hash field to the specified value if the field not exists. <b>Time complexity:</b> O(1) @param key @param field @param value @return

Return all the values in a hash. <p> <b>Time complexity:</b> O(N), where N is the total number of entries @param key @return All the fields values con

Increment the number stored at key by one. If the key does not exist or contains a value of a wrong type, set the key to the value of "0" before to pe

INCRBY work just like {@link #incr(String) INCR} but instead to increment by 1 the increment is integer. <p> INCR commands are limited to 64 bit signe

INCRBYFLOAT <p> INCRBYFLOAT commands are limited to double precision floating point values. <p> Note: this is actually a string operation, that is, in

Return the specified element of the list stored at the specified key. 0 is the first element, 1 the second and so on. Negative indexes are supported,

Return the length of the list stored at the specified key. If the key does not exist zero is returned (the same behaviour as for empty lists). If the

Atomically return and remove the first (LPOP) or last (RPOP) element of the list. For example if the list contains the elements "a","b","c" LPOP will

Add the string value to the head (LPUSH) or tail (RPUSH) of the list stored at key. If the key does not exist an empty list is created just before the

Return the specified elements of the list stored at the specified key. Start and end are zero-based indexes. 0 is the first element of the list (the l

Remove the first count occurrences of the value element from the list. If count is zero all the elements are removed. If count is negative elements ar

Set a new value as the element at index position of the List at key. <p> Out of range indexes will generate an error. <p> Similarly to other list comm

Trim an existing list so that it will contain only the specified range of elements specified. Start and end are zero-based indexes. 0 is the first ele

Move the specified key from the currently selected DB to the specified destination DB. Note that this command returns 1 only if the key was successful

Creates HostAndPort instance from string. String must be in ( host + ":" + port ) format. Port is mandatory. Can convert host part. @see #convertHost(

Undo a {@link #expire(String, int) expire} at turning the expire key into a normal key. <p> Time complexity: O(1) @param key @return Integer reply, sp