java redis LinkedList

Redis does not have a built-in data structure called LinkedList, but it does have a set of data structures that can be used to implement a LinkedList.

One way to implement a LinkedList in Redis is to use a combination of List and Hash data structures. Each node in the LinkedList can be represented as a Hash, where the key is the node identifier and the value is a Hash containing the node data and the next node identifier.

To insert a new node at the beginning of the LinkedList, we can use the LPUSH command to add the new node identifier to the front of the List, and then use the HSET command to set the data and next node identifier for the new node. To insert a new node at the end of the LinkedList, we can use the RPUSH command to add the new node identifier to the end of the List, and then use the HSET command to set the data and next node identifier for the new node.

To traverse the LinkedList, we can start at the head of the List and use the HGETALL command to retrieve the data and next node identifier for each node in the LinkedList.

Here is an example implementation of a LinkedList in Redis using Lists and Hashes:

# Insert a new node at the beginning of the LinkedList
LPUSH mylist node1
HSET node1 data "hello" nextnode "node2"

# Insert a new node at the end of the LinkedList
RPUSH mylist node2
HSET node2 data "world" nextnode "node3"

# Traverse the LinkedList
$ head = "node1"
$ while [ $head != "" ]
$ do
$   data=$(redis-cli HGETALL $head | awk '{print $1"="$2}')
$   echo $data
$   head=$(redis-cli HGET $head nextnode)
$ done
data=hello nextnode=node2
data=world nextnode=node3