9.2. JBoss Transaction Service

JBoss Transaction Service remembers the state of an object. It needs this information for recovery , in which the state represents some past state of the object, and persistence, in which the state represents the final state of an object at application termination. All of these requirements are implemented using the same mechanism: the InputObjectState class and the OutputObjectState class. The classes maintain an internal array into which instances of the standard types can be contiguously packed and unpacked using pack and unpack operations. This buffer is automatically resized as required. The instances are all stored in the buffer in a standard machine-independent form called network byte order. Any other architecture-independent format, such as XDR or ASN.1), can be implemented by replacing the classes with the ones corresponding to the pack and unpack function in the required format.