The @Schedule annotation is used to mark an enterprise bean method as a timeout method according to the calendar schedule specified in the attributes of @Schedule. This annotation has elements that correspond to the calendar expressions and the persistent, info, and timezone elements.

The begin() method creates a new transaction and associates it with the current thread. This method belongs to the UserTransaction interface. The general form of this method is as follows:

public abstract void begin() throws IllegalStateException

This method will throw an IllegalStateException if the thread is already associated with a transaction.

The getEJBLocalObject() method is used to obtain a reference to the EJB local object that is currently associated with the instance and can only be called by an instance of an entity enterprise Bean. The instance must be associated with an EJB local object identity, i.e. in the ejbActivate, ejbPassivate, ejbPostCreate, ejbRemove, ejbLoad, ejbStore, and business methods. An instance can use this method when it wants to pass a reference to itself in a method argument or a result. The general format of this method is as follows:

public EJBLocalObject getEJBLocalObject() throws java.lang.IllegalStateException

The following table summarizes the differences between the Get and Post requests: