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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.*;

/**
 * Used to express an initialization dependency between singleton
 * components.
 * <p>
 *
 * The container ensures that all singleton beans with which a
 * singleton has a <code>DependsOn</code> relationship have been
 * initialized before the singleton's <code>PostConstruct</code>
 * method is called.
 * <p>
 * During application shutdown the container ensures that all singleton beans on
 * with which the singleton has a <code>DependsOn</code> relationship are still
 * available during the singleton's <code>PreDestroy</code> method.
 *
 * @since EJB 3.1
 */
@Target(TYPE)
@Retention(RUNTIME)
public @interface DependsOn {

    /**
     * The ejb-names of singleton components whose initialization must
     * occur before this singleton.  The order in which these names are
     * listed is not significant.
     */
    String[] value();

}