persistence | Persistence Module : A portable extension | Database library
kandi X-RAY | persistence Summary
kandi X-RAY | persistence Summary
Persistence Module: A portable extension for Java EE that provides improved management of persistence and transactions
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Top functions reviewed by kandi - BETA
- Invokes the method on the proxy
- Gets a contextual instance of the given type
- Handle createQuery with string argument
- Joins the transaction
- Processes the fields of an annotated type
- Checks if is EJ environmentless
- Creates an EntityManagerFactory
- Register a managed persistence context
- Create a new entity manager
- Lazy load the EntityManagerFactory
- Process an annotated type
- Creates a new managed session
- This method proxies the FullTextEntityManagers of the EntityManager
- Sets the flush mode
- Inject non - contextual context
- Check the current version number against the passed version number
- Gets the session id
- Processes a producer
- Destroys the context
- Create new flush mode
- Loads the specified entity
- Creates a Hibernate session
- Determines if an exception is rollback
- Registers Hibernate persistence providers
- Invokes the method
- Destroys the context
persistence Key Features
persistence Examples and Code Snippets
Community Discussions
Trending Discussions on persistence
QUESTION
According to the OpenCV Docs, we can use cv::FileStorage
to read/write custom data structure from/to config files (XML, YAML, JSON):
ANSWER
Answered 2021-Jun-15 at 15:05The issue is due to the intruduction of namespace, indeed you can get a similar issue with this code:
QUESTION
I'm trying to make a relation between my Book entity and a list of languages that I retrieve through a service. In my database, each book has a: ID, TITLE, CATEGORY_ID (FK), LANG_ID
Book.java:
...ANSWER
Answered 2021-Jun-15 at 12:54First of all, did you consider to store language in your database? I mean language are mostly the same, doesn't change too often, you can also store in a properties file and read them at runtime to use them later.
Anyway, I think you should:
- first get from external system languages
- store in variable / in memory cache ( like a Map where you can store id and name )
- read your data from database
- for each row you do
- read book language id, read the cache, get out data you need
- for each row you do
If you can't change model, just use a dto with your entity and the language and you're fine
QUESTION
in my example here i want to display a list of appointments of a specific patient in a one to many relationships .. the process is going well but the problem is how to display this list which is in patient as an attribute.
Appointment Entity
...ANSWER
Answered 2021-Jun-14 at 21:02As you have many to one mapping in Appointment entity. you could write the below query in AppointmentRep
List findAllByPatientId(int id);
QUESTION
I am fetching data from table named Cars(fetching models of particular brand and one brand can have multiple models). After selecting brand, I want to display all models and its details inside a form on JSP page. The data is an ArrayList of objects of ArrayList of object and I want to iterate it and display each field on my JSP Page.
Repository :
...ANSWER
Answered 2021-Jun-14 at 11:50Why do you not use foreach loop?
QUESTION
Why lombok doesnt not crate constructor with args
...ANSWER
Answered 2021-Jun-14 at 08:44As per Lombok documentation (https://projectlombok.org/api/lombok/AllArgsConstructor.html):
An all-args constructor requires one argument for every field in the class.
Obviously you haven't provided id as a constructor argument.
QUESTION
I'm a beginner with spring and I have this little issue. "No property questionId found for type CourseTestCompleteField!" I have 2 model classes that are connected via a one to one join. That 2 model class are:
...ANSWER
Answered 2021-Jun-13 at 06:30Since,This is a query on nested Object. You need to update your query as this.
QUESTION
I have defined a ServiceType enumtype and Service itemtype in trainingcore-items.xml.
...ANSWER
Answered 2021-Jun-12 at 15:16This question is related to your another question: How to localize a custom type created in trainingcore-items.xml in Hybris?
Just change type="localized:ServiceType"
to type="ServiceType"
and it will be fine.
QUESTION
I have created a custom type in items.xml. How can I localize the item type? Where should I use the localized keyword for the item type to be localized?
...ANSWER
Answered 2021-Jun-12 at 09:02Do you mean you want to add this service as a localized attribute in another item type?
that can be done with something like this.
QUESTION
I am trying to create my first project movie repository using Spring Boot + RestAPI + JPA + CrudRepository +MySQL.I am getting huge stack trace which is very difficult to understand.
Entity class:
...ANSWER
Answered 2021-Jun-11 at 07:41Remove the below method within the repository interface. The JPA has only find…By, read…By, get…By, query…By, search…By, stream…By.. and so on.
QUESTION
I am creating one spring boot application and trying to make a connection with mysql database.
I have created a schema. and trying to add columns in table through spring boot jpa.
Even though my build is geeting passed I am not able to get sucess. I have tried all the possible way fromthe stackover flow but no luck.
Here is my application.properties
ANSWER
Answered 2021-Jun-10 at 18:46Need to add createDatabaseIfNotExist=true
parameter in datasource URL as shown in below example:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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No vulnerabilities reported
Install persistence
You can use persistence like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the persistence component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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