session cache

One or three States (Transient, Persistent, and Detached) have three states in Hibernate. With deep understanding of it, we can better understand the running mechanism of hibernate. At the beginning, we didn't pay much attention to these concepts,

SessionCannotsendsessioncachelimiter error message. Sessioncannotsendsessioncachelimiter: the following prompt is often displayed at the start of the error prompt: warning: session_start () [function. session-start]: cannotsendsessioncachelimiter-h

Hibernate provides a series of query interfaces that differ in implementation. Here is a summary of the query interface in Hibernate.Let's take a look at the session loading the Entity object: Session before invoking a database query, first the

Transferred from: http://blog.csdn.net/firejuly/article/details/8190229The first chapter hibernate and Mybatishibernate are currently the most popular oThe/R mapping framework, which was born in Sf.net, is now part of JBoss. Mybatis is another

From there, we can see the six core interfaces of Hibernate, two main profiles, and their direct relationships. All of Hibernate's content is here. Well, let's go from top to bottom and make a brief summary of each interface.1. Configuration

Hibernate Level 1 cache and level 2 cache, hibernate Level 1 Cache The cache is between applications and physical data sources. It is used to reduce the frequency of applications accessing physical data sources and improve the running performance of

This paper describes the concept of hibernate three states and their mutual transformation. There are three states in the life cycle of Java objects, and they are transformed into each other. They are temporary states, persistent states, and free

1. Temporary State (Transient): the object created with new is not Persistent, not in Session, and the object in this state is called a temporary object; 2. Persistence (Persistent ): it has been persisted and added to the Session cache. For example,

sq_student_id 003. Bottom Layer generated SQL statement select Sq_student_id.nextval from dual First get the next value of the current sequence from the

Caching is between an application and a physical data source, and it is designed to reduce the frequency of application access to physical data sources, thereby improving the performance of the application. The data in the cache is a copy of the

I. The state of objects in Hibernate 　 1.1. Transient state (temporary state)Not associated with Hibernateis not associated with a record in the database (associated with the ID of the table in the database)Get: Typically only created directly

We understand hibernate from three points of view:Hibernate is a further encapsulation of JDBCOriginally did not use Hiberante to do persistent layer development, there are a lot of redundancy, such as: a variety of JDBC statements, connection

Here is the cascade operation of Hibernate's associated relationship, which is controlled using the Cascade property.Still use department and employee example. Multiple employees corresponding to a department (many-to-one association

Article Source: http://blog.csdn.net/defonds/article/details/2308972 Hibernate The difference between a cache and a level two cacheCaching is between an application and a physical data source, and it is designed to reduce the frequency of

Iii. Open Source FrameworkWhat is Mybaties? Mybaties is an excellent persistence layer framework that supports common SQL queries, stored procedures, and advanced mappings. Mybaties eliminates the manual setting of almost all JDBC code and

HQL QueryHQL provides a very powerful feature, which is for persistent objects, with the acquisition of objects, without update,delete and insert operations. And the HQL is object-oriented, with inheritance, polymorphism and correlation

In hibernate, there are three states, in-depth understanding of it, in order to better understand the operating mechanism of hibernate, just started not to pay attention to these concepts, and then was asked by others, said the interview question,

In the hibernate, there are three states, in-depth understanding of it, in order to better understand the operating mechanism of hibernate, just started to pay little attention to these concepts, and later found that it is important. Have a better

9.4 Batch processing data Typically, only a limited number of persisted objects are stored in the cache of a Session object, and the session object is closed when the session object processes the transaction, releasing the memory occupied by the

Session Cache lifecycle of the cache When the session is opened, the cache begins, and when the session is closed, the cache does not exist, and its lifetime is the same as the session's life cycle. how to store data in the cache Get Method