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ResourceAdapter.javaAPI DocGlassfish v2 API7506Fri May 04 22:35:36 BST 2007javax.resource.spi

ResourceAdapter

public interface ResourceAdapter
This represents a resource adapter instance and contains operations for lifecycle management and message endpoint setup. A concrete implementation of this interface is required to be a JavaBean.
version
1.0
author
Ram Jeyaraman

Fields Summary
Constructors Summary
Methods Summary
public voidendpointActivation(javax.resource.spi.endpoint.MessageEndpointFactory endpointFactory, javax.resource.spi.ActivationSpec spec)
This is called during the activation of a message endpoint. This causes the resource adapter instance to do the necessary setup (ie., setup message delivery for the message endpoint with a message provider). Note that message delivery to the message endpoint might start even before this method returns.

Endpoint activation is deemed successful only when this method completes successfully without throwing any exceptions.

param
endpointFactory a message endpoint factory instance.
param
spec an activation spec JavaBean instance.
throws
NotSupportedException indicates message endpoint activation rejection due to incorrect activation setup information.

public voidendpointDeactivation(javax.resource.spi.endpoint.MessageEndpointFactory endpointFactory, javax.resource.spi.ActivationSpec spec)
This is called when a message endpoint is deactivated. The instances passed as arguments to this method call should be identical to those passed in for the corresponding endpointActivation call. This causes the resource adapter to stop delivering messages to the message endpoint.

Any exception thrown by this method is ignored. After this method call, the endpoint is deemed inactive.

param
endpointFactory a message endpoint factory instance.
param
spec an activation spec JavaBean instance.

public javax.transaction.xa.XAResource[]getXAResources(javax.resource.spi.ActivationSpec[] specs)
This method is called by the application server during crash recovery. This method takes in an array of ActivationSpec JavaBeans and returns an array of XAResource objects each of which represents a unique resource manager. The resource adapter may return null if it does not implement the XAResource interface. Otherwise, it must return an array of XAResource objects, each of which represents a unique resource manager that was used by the endpoint applications. The application server uses the XAResource objects to query each resource manager for a list of in-doubt transactions. It then completes each pending transaction by sending the commit decision to the participating resource managers.

param
specs an array of ActivationSpec JavaBeans each of which corresponds to an deployed endpoint application that was active prior to the system crash.
throws
ResourceException generic exception if operation fails due to an error condition.
return
an array of XAResource objects each of which represents a unique resource manager.

public voidstart(BootstrapContext ctx)
This is called when a resource adapter instance is bootstrapped. This may be during resource adapter deployment or application server startup. This is a startup notification from the application server, and this method is called by an application server thread. The application server thread executes in an unspecified context.

During this method call a ResourceAdapter JavaBean is responsible for initializing the resource adapter instance. Any exception thrown during this method call causes the application server to abort the bootstrap procedure for this specific resource adapter instance.

param
ctx a bootstrap context containing references to useful facilities that could be used by a resource adapter instance.
throws
ResourceAdapterInternalException indicates bootstrap failure. The resource adapter instance is unusable and must be discarded.

public voidstop()
This is called when a resource adapter instance is undeployed or during application server shutdown. This is a shutdown notification from the application server, and this method is called by an application server thread. The application server thread executes in an unspecified context.

During this method call, a ResourceAdapter JavaBean is responsible for performing an orderly shutdown of the resource adapter instance. Any exception thrown by this method call does not alter the processing of the application server shutdown or resource adapter undeployment that caused this method call. The application server may log the exception information for error reporting purposes.