cache « Fetch « JPA Q&A





1. how to retrieve data from a cache in hibernate    coderanch.com

hiiiii all, i have cached a tables data using EHCacheprovider.How can i retrieve the cached data ??? I have written the code shown below. I am able to get the size of the cache but when i pass the id in the get() method it return me the data enclosed in curly brackets... How can i get the data from this ...

2. bug? result of 'join fetch' query is incorrectly cached    forum.hibernate.org

Hi, Im not sure if this is either a bug, a missing option, or just an option that i can't find. Im using hibernate 3.3.2, and EhCache 1.2.3. I recently had an issue where objects in collections were getting dropped from the cache. After a long investigation, I found that it was because a "join fetch" query was being made on ...

4. HQL join fetch and caching    forum.hibernate.org

I always counsel against doing cartesian products like this. It is unscalable as the size of the collections increases. If you *must*, you can do: from Foo left join foo.bars bar left join foo.fums fum and get them all out of the returned array. P.S. The syntax is actually "join fetch", not "fetch join".

6. Join fetch complicates caching?    forum.hibernate.org

7. Optimized fetching (no cache)    forum.hibernate.org

Hi all, In my application I cant maintain any cache, even transaction level cache is not there, now... if I use HQL, in the debug logs I oftenly see a big structure printed which looks like: is generated while parsing the HQL and there is no such thing if I use native SQL query, I think though not sure that CPU ...

8. non-lazy fetching and caching    forum.hibernate.org

I have a many-to-one relationship from class A to B; I've set lazy=false on that relationship in order to ensure that my loaded instances of A get 'real' (non-proxy) references to B. I've also configured B so that it is cached (in the second level cache) and all of my queries for B are marked as cacheable the query cache. From ...

9. how to retrieve data from a cache    forum.hibernate.org

hiiiii all, i have cached a tables data using EHCacheprovider.How can i retrieve the cached data ??? I have written the code shown below. I am able to get the size of the cache but when i pass the id in the get() method it return me the data enclosed in curly brackets... How can i get the data from this ...





10. Query cache miss fetch data from DB without 2nd-L cache    forum.hibernate.org

Problem I need some kind of confirmation for my current understanding/debugging info: in case a query is missing from the query cache, than the data is retrieved using the following algo: - hit the DB and have a ResultSet - try to figure out if the entities are present on the Session cache - if not found in the Session cache ...

11. Hibernate query caching does not fetch many-to-one records    forum.hibernate.org

Hello, My name is Sabeeh. I am currently working on an application which uses hibernate at back end for retrieving records from the DB. The problem is that when I try to fetch records using query catching the many-to-one records are not cached in the record set. e.g. I am using the following HQL Query query = session.createQuery("from com.salesgene.common.bean.hibernate.Task as task ...

12. Join-fetch query stops working with query caching    forum.hibernate.org

Newbie Joined: Wed Mar 14, 2007 4:35 am Posts: 3 Location: Melbourne, Australia I am using join-fetch queries that are working fine with L2/query caching off. However, enabling L2/query caching for these queries causes an IllegalArgumentException-object is not an instance of declaring class. Using the debugger, I can see that the query has completed successfully, and the exception is thrown when ...