OSI/MHS P7 Application Programmatic Interface (P7 API) Manual

Introduction to the P7 API
OSI/MHS P7 Application Programmatic Interface (P7 API) Manual—424825-001
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P7 API Client Applications
Message Store (MS) Group
The message store (MS) group is used for long-term storage of messages. With a
message store, the client application does not have to be connected to the subsystem
when the message is delivered to the message store. You can connect to the OSI/MHS
subsystem from the P7 API client application whenever you want to read or send
messages.
Each MS group can support up to 1,000 users and provides a single mailbox for each
user it supports. For more information on MS groups, see the OSI/MHS Configuration
and Management Manual.
Message Relay (MR) Group
The message relay (MR) group implements the message transfer function and supports
the P1 protocol. It can accept submitted messages from P7 API client applications and
transfers those messages to all destinations for which it is responsible: an MS group in
the local subsystem, an MR group in an adjacent MTA (Message Transfer Agent), the
Transfer X400 gateway, or the Gateway Programmatic Interface (GPI) gateway.
For more information on MR groups and adjacent MTAs, see the OSI/MHS
Configuration and Management Manual.
MHS Manager
The MHS manager process is the focal point for configuration and control
components of the OSI/MHS subsystem to which the P7 API connects. Among other
functions, it maintains the OSI/MHS configuration database and starts and monitors
subsystem processes.
LO groups are under the control of the MHS manager. Just like other OSI/MHS groups,
LO groups are added to the OSI/MHS configuration by using Subsystem Control
Facility (SCF) commands. You can also start, stop, and monitor the LO groups by
using SCF commands.
For more information on adding LO groups and on the MHS manager, see the OSI/MHS
Configuration and Management Manual.
P7 API Client Applications
Client applications written using the P7 API are local user agents that perform P7
operations. The following subsections describe:
•
The P7 operations that can be performed by a P7 API client application
•
Local user agents in relation to remote user agents