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安裝中文字典英文字典辭典工具!
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- java - Whats the difference between session. persist () and . . .
From this forum post persist() is well defined It makes a transient instance persistent However, it doesn't guarantee that the identifier value will be assigned to the persistent instance immediately, the assignment might happen at flush time
- java - JPA - What exactly does it mean for an entity object to . . .
However, it is not explicitly clear what it means for an entity object to persist I think I have an idea, but I would rather not assume its meaning I am referencing the Oracle JPA Doc, but they continue to use the words like "persist
- persistent - What exactly is persistence? - Stack Overflow
I've searched all over the web for definitions, but I'm still confused I've narrowed it all down to two different defintions: "A data structure is persistent if it support saccess to multiple ver
- JPA EntityManager: Why use persist () over merge ()?
If you remove an entity and then decide to persist the entity back, you may do that only with persist(), because merge will throw an IllegalArgumentException D3 If you decided to take care manually of your IDs (e g by using UUIDs), then a merge operation will trigger subsequent SELECT queries in order to look for existent entities with that ID, while persist may not need those queries
- What is a persistent login session in simple words?
Persistent login session: allows users to stay logged in to a website or application even after they close the browser or leave the site
- java - What is the difference between persist () and merge . . .
The semantics of the persist operation, applied to an entity X are as follows: If X is a new entity, it becomes managed The entity X will be entered into the database at or before transaction commit or as a result of the flush operation
- redux-persist: Whats the difference between persist and . . .
persist = writing the store to any kind of storage that survives closing your browser session rehydrate = reading from that storage and putting the data back into the javascript runtime, so redux can access it
- Whats the easiest way to persist java objects? - Stack Overflow
Sounds like you may want to persist to a DB However, to avoid the complexities of a DB one simple solution for persisting POJOs to the file system is to serialize them to an XML document The Java 1 6 API includes the
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