Retrieve Person object from Redis without providing hashcode

Question

I am working on a Spring-MVC application in which I am inserting a Person object in Redis. Now When inserting the object, I also need to provide the hashCode value for Person retrieved. Is there any way, I can retrieve the Person object without passing the hashCode, just the key part. Kindly let me know. Here is the insert code :

Insert code :

Person person = // person retrieved from DB.
this.userAppRegistration.getRedisTemplate().opsForHash().put(String.valueOf(person.getId()),person.hashCode(),person);

Retrieval code :

this.userAppRegistration.getRedisTemplate().opsForHash().get("Key_Available",)

I don't have access to hashcode of the Person I inserted at this point. How can I still retrieve the Person object using only key. Thanks a lot. :-)

score 1 · Accepted Answer · answered Aug 19 '15 at 11:08

1

Redis is a key-value store. You put there a value with a key, and you retrieve it with the same key.

You've decided to make your key a combination of person's ID, hashcode and the person itself (or rather its toString() most likely). Don't do that. It makes no sense whatsoever, and as you're now noticing it makes it impossible for you to retrieve the value.

answered Aug 19 '15 at 11:08

Kayaman

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How shall I insert and retrieve then? Thanks a lot. – We are Borg Aug 19 '15 at 11:09
Something that you can use later on, such as a person's ID or username or whatever. Depends on your business rules. Ask your Borg brothers. – Kayaman Aug 19 '15 at 11:11
1

Thanks, and my Borg bro's have replied. This works : http://pastebin.com/MZG9rgkR . Can you tell me if this is a correct approach? Thanks a lot. Cant ask my borg brothers, they are regenerating. Thanks. :-) – We are Borg Aug 19 '15 at 11:16
Now that looks a lot smarter. – Kayaman Aug 19 '15 at 11:18
Oh, thanks a lot. :-) I return to my my alcove. Bye. :-) – We are Borg Aug 19 '15 at 11:20

Retrieve Person object from Redis without providing hashcode

1 Answers1