Hashes in Redis are perfect for representing objects. A common use case is when you need to retrieve all field-value pairs (hash values) stored in a hash at a given key.
We will be using
Jedis, a popular Redis client for Java. Let's suppose we have a hash stored at key 'user:1' and want to fetch all fields and their corresponding values.
In this example,
hgetAll() method is used to get all fields and corresponding values of hash stored at 'user:1'.
jedis.close()) when you're done to prevent resource leaks.
What happens if the key does not exist in Redis?
If the key does not exist,
hgetAll() will return an empty map.
Can I use this method to get values from data structures other than hashes in Redis?
hgetAll() is specifically meant for hashes. Attempting to use it on other data structures will result in an error.