6.1 Data Conversion
Like other domain gateways, the Oracle Tuxedo Mainframe Adapter for SNA Gateway uses ATMI typed buffers to transmit and receive data. Since the remote host application does not understand the typed buffer, the ATMI application must communicate with the host application by using an aggregate data type known as a record. A record is a flat data area defined by a template that describes the data type and length of each field in the record.
The application developer should determine the format and content of the record structure used on the remote host, as well as the ATMI typed buffer to be used, before configuring the Gateway.
In most cases the conversion between ATMI typed buffers and
record formats is handled by the Oracle Tuxedo Mainframe Adapter
for SNA Gateway. The service definitions in the
DM_LOCAL_SERVICES and the
DM_REMOTE_SERVICES section of the
DMCONFIG file provide parameters to describe the typed
buffer/record combination required for successful communications
between the applications.
Note:
The current size of remote host messages is limited to approximately 32K bytes. Any conversions resulting in records larger than 32756 bytes are not supported.