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package javax.resource.spi.endpoint;
import java.lang.NoSuchMethodException;
import javax.transaction.xa.XAResource;
import javax.resource.spi.UnavailableException;
/**
* This serves as a factory for creating message endpoints.
*
* @version 1.7
* @since 1.5
* @author Ram Jeyaraman, Sivakumar Thyagarajan
*/
public interface MessageEndpointFactory {
/**
* This is used to create a message endpoint. The message endpoint is
* expected to implement the correct message listener type.
*
* @param xaResource an optional XAResource
* instance used to get transaction notifications when the message delivery
* is transacted.
*
* @return a message endpoint instance.
*
* @throws UnavailableException indicates a transient failure
* in creating a message endpoint. Subsequent attempts to create a message
* endpoint might succeed.
*/
MessageEndpoint createEndpoint(XAResource xaResource)
throws UnavailableException;
/**
* This is used to create a message endpoint. The message endpoint is
* expected to implement the correct message listener type.
*
* @param xaResource an optional XAResource
* instance used to get transaction notifications when the message delivery
* is transacted.
*
* @param timeout an optional value used to specify the time duration
* (in milliseconds) within which the message endpoint needs to be
* created by the MessageEndpointFactory. Otherwise, the
* MessageEndpointFactory rejects the creation of the
* MessageEndpoint with an UnavailableException. Note, this
* does not offer real-time guarantees.
*
* @return a message endpoint instance.
*
* @throws UnavailableException indicates a transient failure
* in creating a message endpoint. Subsequent attempts to create a message
* endpoint might succeed.
* @since 1.6
*/
MessageEndpoint createEndpoint(XAResource xaResource, long timeout)
throws UnavailableException;
/**
* This is used to find out whether message deliveries to a target method
* on a message listener interface that is implemented by a message
* endpoint or a target method in the Class returned by the
* getBeanClass method, will be transacted or not.
*
* The message endpoint may indicate its transacted delivery preferences
* (at a per method level) through its deployment descriptor. The message
* delivery preferences must not change during the lifetime of a
* message endpoint.
*
* @param method description of a target method. This information about
* the intended target method allows an application server to find out
* whether the target method call will be transacted or not.
*
* @throws NoSuchMethodException indicates that the specified method
* does not exist on the target endpoint.
*
* @return true, if message endpoint requires transacted message delivery.
*/
boolean isDeliveryTransacted(java.lang.reflect.Method method)
throws NoSuchMethodException;
/**
* Returns a unique name for the message endpoint deployment represented
* by the MessageEndpointFactory. If the message endpoint has
* been deployed into a clustered application server then this method must
* return the same name for that message endpoint’s activation in each
* application server instance.
*
* It is recommended that this name be human-readable since this name may
* be used by the resource adapter in ways that may be visible to a user
* or administrator.
*
* It is also recommended that this name remain unchanged even in cases
* when the application server is restarted or the message endpoint
* redeployed.
*
* @return a new String instance representing the unique
* name of the message endpoint deployment
*
* @since 1.7
*/
String getActivationName();
/**
* Return the Class object corresponding to the message
* endpoint class. For example, for a Message Driven Bean this is the
* Class object corresponding to the application's MDB class.
*
* The resource adapter may use this to introspect the
* message endpoint class to discover annotations, interfaces implemented,
* etc. and modify the behavior of the resource adapter accordingly.
*
* A return value of null indicates that the
* MessageEndpoint doesn't implement the business methods of
* underlying message endpoint class.
*
* @return A Class corresponding to the message endpoint class.
*
* @since 1.7
*/
public Class getEndpointClass();
}