By: aathishankaran Printer Friendly Format
J2EE Connector Architecture:
The Connector architecture is a J2EE SPI that allows resource adapters
that support access to Enterprise Information Systems to be plugged in to any
J2EE product. The Connector architecture defines a standard set of system-level
contracts between a J2EE server and a resource adapter. The standard contracts
connection management contract that lets a J2EE server pool connections to an
underlying EIS, and lets application components connect to an EIS. This leads to
a scalable application environment that can support a large number of clients
requiring access to EIS systems.
transaction management contract between the transaction manager and an EIS that
supports transactional access to EIS resource managers. This contract lets a
J2EE server use a transaction manager to manage transactions across multiple
resource managers. This contract also supports transactions that are managed
internal to an EIS resource manager without the necessity of involving an
external transaction manager.
A security contract that enables secure access to an EIS. This contract
provides support for a secure application environment, which reduces security
threats to the EIS and protects valuable information resources managed by the
A thread management contract that allows a resource adapter to delegate
work to other threads and allows the application server to manage a pool of
threads. The resource adapter can control the security context and transaction
context used by the worker thread.
A contract that allows a resource adapter to deliver messages to message
driven beans independent of the specific messaging style, messaging semantics,
and messaging infrastructure used to deliver messages. This contract also serves
as the standard message provider pluggability contract that allows a message
provider to be plugged into any J2EE server via a resource adapter.
A contract that allows a resource adapter to propagate an imported
transaction context to the J2EE server such that its interactions with the
server and any application components are part of the imported transaction. This
contract preserves the ACID (atomicity, consistency, isolation, durability)
properties of the imported transaction.
An optional contract providing a generic command interface between an
application program and a resource adapter.
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