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package javax.ejb;
import java.lang.annotation.Target;
import static java.lang.annotation.ElementType.*;
import java.lang.annotation.Retention;
import static java.lang.annotation.RetentionPolicy.*;
/**
* The <code>TransactionAttribute</code> annotation specifies whether
* the container is to invoke a business method within a transaction
* context.
*
* The <code>TransactionAttribute</code> annotation can be used for
* session beans and message driven beans. It can only be specified
* if container managed transaction demarcation is used.
* <p>
*
* The annotation can be specified on the bean class and/or it can be
* specified on methods of the class that are methods of the business
* interface or no-interface view.
* <p>
* Specifying the <code>TransactionAttribute</code> annotation on the
* bean class means that it applies to all applicable business
* methods of the class. Specifying the annotation on a
* method applies it to that method only. If the annotation is applied
* at both the class and the method level, the method value overrides
* if the two disagree.
*
* <p>
* The values of the <code>TransactionAttribute</code> annotation are
* defined by the enum <code>TransactionAttributeType</code>. If
* the <code>TransactionAttribute</code> annotation is not specified, and
* the bean uses container managed transaction demarcation, the semantics of
* the <code>REQUIRED</code> transaction attribute are assumed.
*
* @see TransactionAttributeType
*
* @since EJB 3.0
*/
@Target({METHOD, TYPE})
@Retention(RUNTIME)
public @interface TransactionAttribute {
TransactionAttributeType value() default TransactionAttributeType.REQUIRED;
}