Specify a method to perform exclusive control when you are accessing business methods of Singleton Session Bean in which the Container Managed Concurrency is set.

The following table lists the @Lock attributes:

Attribute name	Functionality
value	Specify whether concurrent access is allowed (READ) or not allowed (WRITE) when you access business methods.

Details of each attribute are as follows:

(a) value attribute

Type

LockType

Description

Specify whether access is allowed (READ) or not allowed (WRITE) when you access business methods.

Default value

WRITE