Transactions and Concurrency in Hibernate

Transactions and Concurrency in Hibernate

The most important point about Hibernate Entity Manager and concurrency control is that it is very easy to

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Entity manager and transaction scopes

To complete this picture you also have to think about database transactions

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Unit of work

The challenge is the implementation of this (and other) behavior outside an EJB3 container.

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Long units of work

A first naive implementation might keep the EntityManager and database transaction open during user

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Considering object identity

This approach leaves Hibernate and the database to worry about concurrency.

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Common concurrency control issues

Make sure you understand the implications before making a design decision.

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Database transaction demarcation

A JPA application can run in non-managed

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Non-managed environment

A call to close() marks the end of an EntityManager.

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EntityTransaction

It also provide a way to mark a transaction as rollback only, ie force the transaction to rollback.

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Using JTA

With Container Managed Transactions (CMT) in an EJB3 container, transaction demarcation

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Exception handling

The Hibernate entity manager generally raises exceptions which encapsulate the Hibernate core exception.

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EXTENDED Persistence Context

In an EXTENDED persistence context, all read only operations of the entity

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Container Managed Entity Manager

This is perfect to implement the entitymanager-per-conversation pattern.

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Application Managed Entity Manager

It is not legal to call entityManager.joinTransaction() if no JTA transaction is involved.

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Optimistic concurrency contro

The use cases we show are in the context of long application transactions but version checking.

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Application version checking in Hibernate

The version property is mapped using @Version, and the entity manager will automatically

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Extended entity manager and automatic versioning

This pattern is problematic if the persistence context is too big to be stored during user think time,

Read More →

Detached objects and automatic versioning

The application manipulates the state of detached instances originally loaded in another persistence context

Read More →

Transactions and Concurrency in Hibernate

The most important point about Hibernate Entity Manager and concurrency control is that it is very easy to

Read More →

Entity manager and transaction scopes

To complete this picture you also have to think about database transactions

Read More →

Unit of work

The challenge is the implementation of this (and other) behavior outside an EJB3 container.

Read More →

Long units of work

A first naive implementation might keep the EntityManager and database transaction open during user

Read More →

Considering object identity

This approach leaves Hibernate and the database to worry about concurrency.

Read More →

Common concurrency control issues

Make sure you understand the implications before making a design decision.

Read More →

Database transaction demarcation

A JPA application can run in non-managed

Read More →

Non-managed environment

A call to close() marks the end of an EntityManager.

Read More →

EntityTransaction

It also provide a way to mark a transaction as rollback only, ie force the transaction to rollback.

Read More →

Using JTA

With Container Managed Transactions (CMT) in an EJB3 container, transaction demarcation

Read More →

Exception handling

The Hibernate entity manager generally raises exceptions which encapsulate the Hibernate core exception.

Read More →

EXTENDED Persistence Context

In an EXTENDED persistence context, all read only operations of the entity

Read More →

Container Managed Entity Manager

This is perfect to implement the entitymanager-per-conversation pattern.

Read More →

Application Managed Entity Manager

It is not legal to call entityManager.joinTransaction() if no JTA transaction is involved.

Read More →

Optimistic concurrency contro

The use cases we show are in the context of long application transactions but version checking.

Read More →

Application version checking in Hibernate

The version property is mapped using @Version, and the entity manager will automatically

Read More →

Extended entity manager and automatic versioning

This pattern is problematic if the persistence context is too big to be stored during user think time,

Read More →

Detached objects and automatic versioning

The application manipulates the state of detached instances originally loaded in another persistence context

Read More →
Transactions and Concurrency in Hibernate,Transactions and Concurrency in Hibernate,Entity manager and transaction scopes,Unit of work,Long units of work,Considering object identity,Common concurrency control issues,Database transaction demarcation,Non-managed environment,EntityTransaction,Using JTA,Exception handling,EXTENDED Persistence Context,Container Managed Entity Manager,Application Managed Entity Manager,Optimistic concurrency contro,Application version checking in Hibernate,Extended entity manager and automatic versioning,Detached objects and automatic versioning,Transactions and Concurrency in Hibernate,Entity manager and transaction scopes,Unit of work,Long units of work,Considering object identity,Common concurrency control issues,Database transaction demarcation,Non-managed environment,EntityTransaction,Using JTA,Exception handling,EXTENDED Persistence Context,Container Managed Entity Manager,Application Managed Entity Manager,Optimistic concurrency contro,Application version checking in Hibernate,Extended entity manager and automatic versioning,Detached objects and automatic versioning