public interface ConnectionManager
ConnectionManager interface provides a hook for the resource adapter to pass a connection request to the application server.
An application server provides implementation of the ConnectionManager interface. This implementation is not specific to any particular type of the resource adapter or connection factory interface.
The ConnectionManager implementation delegates to the application server to enable latter to provide quality of services (QoS) - security, connection pool management, transaction management and error logging/tracing.
An application server implements these services in a generic manner, independent of any resource adapter and EIS specific mechanisms. The connector architecture does not specify how an application server implements these services; the implementation is specific to an application server.
After an application server hooks-in its services, the connection request gets delegated to a ManagedConnectionFactory instance either for the creation of a new physical connection or for the matching of an already existing physical connection.
An implementation class for ConnectionManager interface is
required to implement the
In the non-managed application scenario, the ConnectionManager implementation class can be provided either by a resource adapter (as a default ConnectionManager implementation) or by application developers. In both cases, QOS can be provided as components by third party vendors.
The method allocateConnection gets called by the resource adapter's connection factory instance.
java.lang.Object allocateConnection(ManagedConnectionFactory mcf, ConnectionRequestInfo cxRequestInfo) throws ResourceException
The method allocateConnection gets called by the resource adapter's connection factory instance. This lets connection factory instance (provided by the resource adapter) pass a connection request to the ConnectionManager instance.
The connectionRequestInfo parameter represents information specific to the resource adapter for handling of the connection request.
mcf- used by application server to delegate connection matching/creation
cxRequestInfo- connection request Information
ResourceException- Generic exception
ApplicationServerInternalException- Application server specific exception
SecurityException- Security related error
ResourceAllocationException- Failed to allocate system resources for connection request
ResourceAdapterInternalException- Resource adapter related error condition