HP-UX SNAplus2 R7 APPC Programmer's Guide

1.3 Conﬁrmation Processing (half-duplex)....................................................................................25

1.3.1 Establishing the Synchronization Level.......................................................................26

1.3.2 Sending a Conﬁrmation Request ...............................................................................26

1.3.3 Receiving Data and a Conﬁrmation Request.. ........................................................... 27

1.3.4 Responding to the Conﬁrmation Request...................................................................27

1.3.5 Deallocating the Conversation.....................................................................................27

1.4 Sending and Receiving Status with Data (half-duplex).. ........................................................27

1.4.1 Sending Status Information with Data.........................................................................28

1.4.2 Receiving Status Information with Data......................................................................28

1.5 Conversation States (half-duplex)...........................................................................................29

1.5.1 The TP’s View of the Conversation.............................................................................30

1.5.2 State Changes.............................................................................................................30

1.5.3 State Checks.. .............................................................................................................30

1.6 Changing Conversation States (half-duplex)..........................................................................30

1.6.1 Initial States.................................................................................................................32

1.6.2 Changing to Receive State.. ....................................................................................... 33

1.6.3 Changing to Send State..............................................................................................33

1.7 Full-Duplex Conversations.. .................................................................................................... 33

1.7.1 Starting a Conversation...............................................................................................34

1.7.2 Sending Data...............................................................................................................34

1.7.3 Receiving Data............................................................................................................35

1.7.4 Ending a Conversation................................................................................................35

1.7.5 Conversation States....................................................................................................35

1.7.6 Half-Duplex Verbs Not Permitted in Full-Duplex Conversations.................................36

1.8 Sending and Receiving Expedited Data.................................................................................36

1.9 Synchronous and Asynchronous APPC Calls........................................................................36

1.10 Receiving Data Asynchronously............................................................................................37

1.11 Non-Blocking Operation........................................................................................................39

1.12 Syncpoint Support.................................................................................................................41

1.13 APPC and CPI-C.. ................................................................................................................ 42

1.14 TP Server API.......................................................................................................................42

Chapter 2 Writing Transaction Programs............................................................................................43

2.1 Categories of APPC Verbs.. ................................................................................................... 43

2.1.1 Control Verbs...............................................................................................................43

2.1.2 Conversation Verbs..................................................................................................... 44

2.1.3 TP Server Verbs..........................................................................................................45

2.2 APPC Verb Summary..............................................................................................................45

2.2.1 Starting a Conversation...............................................................................................45

2.2.2 Sending Data...............................................................................................................46

2.2.3 Receiving Data ...........................................................................................................47

2.2.4 Conﬁrming Receipt of Data or Reporting Errors.........................................................47

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