hibernate no locking

[Change] Hibernate ---- pessimistic locking and optimistic locking. Hibernate locking mechanism

[Change] Hibernate ---- pessimistic locking and optimistic locking, Hibernate from the locking mechanism: http://www.blogjava.net/pengpenglin/archive/2010/03/15/315444.html [1] optimistic locking (Optimistic locking) version of the strategy adopted: ...

Hibernate pessimistic locking and optimistic locking implementation

Hibernate pessimistic locking and optimistic locking: 1. Pessimistic locking: lock to its name, as long as the data processing, data will be locked, no one can visit to see ... ... more pessimistic about the wow. 2. Optimistic locking: pessimistic lo

Hibernate optimistic locking anomaly org.hibernate.StaleObjectStateException

Most Hibernate optimistic locking is based on data version (version) logging mechanism implemented. The so-called Shu Ju version is to add a version identifier for the data, based on database tables Release addresses the program, generally increased by pr

Hibernate optimistic locking using

hibernate optimistic locking using the steps are simple: 1. In the database, add a version field, integer type 2. Hbm file class labels to add property optimistic-lock = "version" 3. Join the version of the configuration file <version na

Hibernate optimistic locking and pessimistic locking

The implementation of business logic, the need to ensure that data access is often exclusive. Such as the end of the day in the financial settlement processing system, we hope for a cut-off time data processing, would not want to carry out the process of

Hibernate optimistic locking and pessimistic locking locks

Today is New Year's Day, and nothing to do, write something made up! 1, Pessimistic Locking pessimistic locking; pessimistic [, pesi'mistik] adj. pessimistic, world-weary; pessimism 2, Optimistic Locking optimistic locking; optimistic [, ɔpti'

Hibernate pessimistic locking mechanism for locking and optimistic locking

hibernate lock mechanism 1. Pessimistic lock It refers to the modification of data by outsiders hold a conservative attitude. The assumption that at any time access to data, may also have another client to access the same data, in order to maintain t ...

hibernate optimistic locking and pessimistic locking (1)

1. Pessimistic lock It refers to the modification of data by outsiders hold a conservative attitude. The assumption that at any time access to data, may also have another client to access the same data, in order to maintain the consistency of data op ...

Hibernate optimistic locking implementation ---- version

Optimistic concurrency control, there can be three ways. 1, Version version number 2, time stamp 3, automatic version control. Here is not recommended in new applications, there is no version or timestamp column defined version control: it is slower, more

Hibernate optimistic locking Caution

1, <version name="ssssversion" column="SS_VER" type="java.lang.Integer" /> Id must be below this line, the same combination of Id 2, entity types used in the field should be int, Long types error 3, update time if

Hibernate depth

Hibernate cache strategy Level cache: session, hibernate cache autonomy 2 cache (Ehcache) Read-only Nonstrict-read-write Read-write (key issues) Transactional (transactional cache <Ehcache This mode is not supported >) JbossCache have 2 cache, ...

Secondary cache using hibernate (not configured)

hibernate the use of the secondary cache must be a problem, see article has countless intended not to use the hibernate second cache, because according to him will be into some risks. If, however, do not use hibernate 2 cache, its performance is rela ...

On the optimistic locking and pessimistic locking

Here the first optimistic locking and pessimistic locking on the concept and to do the next describes the basic usage, because the web has a more detailed excerpt of the directly ************************************************** **************** Lock (lo

hibernate-mapping arguments detailed

hibernate-mapping arguments detailed Mapping file parsing: 1, hibernate-mapping 1.default-access (optional - defaults to property): Hibernate to access the property strategy. Can be achieved PropertyAccessor interface customization. 2.default-lazy (option

Hibernate's optimistic locking and pessimistic locking

Hibernate's optimistic locking and pessimistic locking locks (locking) Business logic of the implementation process, often need to ensure that the exclusive data access. Such as the end of the day in the financial system, billing address, and we hope

SQL optimistic locking and pessimistic locking

Lock (locking) The implementation of business logic, the need to ensure that data access is often exclusive. Such as the end of the day in the financial settlement processing system, we hope for a cut-off time data processing, would not want to carry out

Hibernate and concurrency control of transaction

1. Service Description: 1.1. Service definition: Services refers to as a single logical unit of work performed a set of data operations, these operations must either all succeed, or be a total failure, to ensure data consistency and integrity. 1.2. Servic

[Change] database optimistic locking and pessimistic locking concept

Recently used in the program select ... for update statements, but found that the statement is accurate with the. Feel the whole process a bit slow. Among depressed, they find the point when the concept of the University of catching a good catching u

common method hibernate session

persist () method and save () method persist () method is only appeared in the Hibernate3 version, the realization of the EJB3 persistence specification defined semantics, persist () method does not guarantee the immediate object of the OID for the persis

Hibernate and concurrency control in transaction

1. Service Description: 1.1. Service definition: Transaction refers to as a single logical unit of work performed a set of data operations that must either all succeed or all must fail in order to ensure data consistency and integrity. 1.2. Transaction ha

Hibernate's affairs. Isolation level. Pessimistic locking. Optimistic locking

Services need to ensure atomicity (Atomicity), consistency (Consistence), isolation (Isolation behavior), persistent (Durability), referred to as ACID. Atomicity: A transaction either all the operations succeed or all fail rollback. Consistency: The

Database optimistic locking and pessimistic locking, and the circumstances

Lock (locking) Business logic of the implementation process, often need to ensure exclusive access to data. If the end of the day in the financial settlement processing system, we hope for a cut-off point in time data processing, rather than hope for

(R) database optimistic locking and pessimistic locking concept

Lock (locking) Business logic of the implementation process, often need to ensure exclusive access to data. If the end of the day in the financial settlement processing system, we hope for a cut-off point in time data processing, rather than hope for

[Transfer] optimistic locking and pessimistic locking

Lock (locking) Business logic of the implementation process, often need to ensure exclusive access to data. If the end of the day in the financial settlement processing system, we hope for a cut-off point in time data processing, rather than hope for in t

Hibernate secondary cache

Hibernate cache: 2-bit cache, also known as process-level cache or SessionFactory level cache, secondary cache can be shared by all of the session Cache configuration and the use of: Will echcache.xml (the document code in hibernate package directory ...

Hibernate annotation using notebook

These are the basic common @Entity --Declared an entity bean @Table(name="promotion_info") --For the entity bean mapping for the specified table (Table name ="promotion_info) @Id --Declare that the identifying attribute of the entity bean @GeneratedValue

hibernate Technical Study Notes (first)

Introduction: Model does not match (impedance mismatch) java object-oriented language, object model, its key concepts are: inheritance, association, polymorphism, etc.; database is the relational model, its key concepts are: tables, primary keys, for ...

Study Notes Hibernate three (cache)

Divided into two levels: session level (level cache), sessionFactory secondary cache session cache, we must at the same session, if the session closed, the cache is lost. Cache level for relatively short periods. save, update, saveOrUpdate, load, get, lis

hibernate in the pessimistic and optimistic locking lock and lazy loading

hibernate frequently used when many individuals of the same data at the same time when changes will happen dirty data, resulting in data inconsistency, the solution can be adopted by the pessimistic and optimistic locking to achieve lock. Pessimistic lock

hibernate second cache

hibernate cache Secondary cache, also known as process-level cache or SessionFactory-level cache, secondary cache can be shared by all of the session Secondary cache and the life cycle of the life cycle of SessionFactory consistent, SessionFactory to ...

Hibernate Id Generator

hibernate mapping files are bean.hbm.xml-one correspondence with the database table, if the database table primary key existence. sometimes required automatically generated using native, is sometimes required at the time gave us insert assignment by him a

Ibatis VS Hibernate Persistence Layer

1. The complexity of database tables, first of all depends on demand and does not depend on the design, design capability and strong person, but also comply with the normative database table design, from Bacchus on three paradigm, in principle, have to co

Hibernate performance optimization techniques

Deal with large amount of data at the time, there will be many data buffer stored in the Session level cache, this cache will be great too serious display performance, so in the use of Hibernate handle large data volume, you can use session.clear ( ) ...

Hibernate optimization performance considerations

HIBERNATE of early use may have experienced performance problems, to achieve the same functionality, with the use of JDBC used HIBERNATE ten times the difference between the performance of normal, if not early adjustment is likely to affect the progress o

hibernate-depth study notes

hibernate-depth study notes Keywords: hibernate o / r maping Hb just in the fire is abuse, seen, but not very ormaping understand that we are now looking to re-hb, before many areas are not Now suddenly have a lot about all the basic . Logo generator incr

And Spring2.5 profile Hibernate Annotation Notes

1. Web.xml configuration <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/applicationContext.xml <!--classpath*:/spring-config/applicationContext.xml--> </param-value> </context-p

Optimization hibernate

HIBERNATE help this article in accordance with the documents, books and a number of network projects from the experience of finishing, only the main points and ideas, of the specific approach can explore the message, or find some more detailed information

With regard to the use of hibernate cache

To reprint http://blog.csdn.net/woshichenxu/archive/2006/01/22/586361.aspx 1. Hibernate on the issue of cache: 1.1.1. The basic principle of the cache Hibernate cache is divided into two, the first-class stored in the session referred to as a cache, and c

Hibernate Study Notes (f)

Services Hibernate in fact the prototype of the things or similar database. There is no special place to learn at least the first time I find that there is nothing special. Hibernate in a few unusual and commonly used approach HibernateException, is ...

Hibernate Database template base class GenericDao

/ / Use of designated entities and attributes (non-primary key) search (to meet the entity attribute value like string) data public List findLikeByEntity (T entity, String [] propertyNames); / / Use the specified search criteria to retrieve data and ...

Spring + Hibernate application in the framework of the GenericHibernateDao

GenericHibernateDao Prepared under the framework of Spring + Hibernate application can not be always prepared from a common generic GenericHibernateDao. Access to the Internet to achieve a lot of GenericHibernateDao, collate and analyze the following real

Hibernate cache problem

1. With regard to hibernate caching problems: 1.1.1. The basic theory of caching Hibernate cache is divided into two, the first-level store in the session, called a cache, the default and can not be unloaded with. The second level is controlled by the ses

Hibernate cache discussion

There are three kinds of general system will bypass the hibernate implementation of database operations: 1, multiple applications simultaneous access to a database Such a situation would inevitably use the hibernate 2 cache of the cause data inconsistency

HIbernate in line with Java custom relational database persistence of XML configuration

Hibernate-mapping <hibernate-mapping schema = "schemaName" (1) catalog = "catalogName" (2) default-cascade = "cascade_style" (3) default-access = "field | property | ClassName" (4) default-lazy = "true | fal

hibernate mapping file Xiangjie 1

1. Doctype All XML mappings are shown above need to define the doctype. DTD can be obtained from the above URL, it can be hibernate-xxx/src/net/sf / hibernate directory, or hibernate.jar documents found. Hibernate will always be the first in its classptah

hibernate mapping file Xiangjie 2

8. Generator <generator> Optional sub-element is the name of a Java class used for persistent instances of a class to generate unique identifiers. If the generator needs some configuration values or the instance initialization parameters, using <

Details of the generic DAO and use Hibernate

Under the framework of the preparation of Spring + Hibernate application can not always be prepared from a common generic GenericHibernateDao. Search the web many GenericHibernateDao implementation, collate and analyze as follows to achieve, for the follo

Hibernate Performance Tuning

HIBERNATE help documentation in accordance with this article, a number of books and project experience in network order made, only the main points and ideas, specific practices can be a message to explore, or find some more detailed and more specific info

Hibernate mapping configuration properties to explain the relationship between

1. Attributes and their meaning hibernate-mapping properties auto-import (optional - defaults to true): Specifies whether we can in the query language, use of non-fully qualified class name (only in this mapping file in the class). package (optional): Spe

Hibernate Knowledge Summary (2)

Hibernate Transaction 4 transaction isolation level Unauthorized reading (Read Uncommitted): Allow dirty reads, but not lost update. If a transaction has begun to write the data, then another at the same time a transaction is not allowed to write ope ...
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