Examples of APPC Operations

LU 6.2 Operations describes possible LU 6.2 operations in abstract terms.
Table 1. LU 6.2 Operations
Operation What the Operation Does
Send Sends a block of data to the other program.
Receive If currently in send state, transmits any buffered output data and enters receive state. Waits for data to arrive and receives it.
Await confirmation Transmits any buffered output data. Waits until the partner program confirms that it has received and processed all data.
Confirm Sends the partner program confirmation that all data has been received and processed.
Error If in receive state, purges any buffered input data and enters send state. If currently in send state, purges any buffered output data. Causes the partner program's current operation to end with a special return code.
Close If currently in send state, transmits any buffered output data. Ends the conversation.
Both LU 6.2 APIs offer these services (and others), and both offer services that allow you to combine two or more of these basic operations to improve performance. The following sections use these terms when discussing the types of conversations to avoid contrasting the details of each API. For example, the term Send used in LU 6.2 Operations can represent the APPC verbs SEND_DATA, or MC_SEND_DATA, or the CPI-C function CMSEND.