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Chapter 19. Writing a 3270 bridge exit program
Considerations common to all user-replaceable programs
Note that the comments contained in “Chapter 5. General notes about
user-replaceable programs” on page 401 apply to this chapter.
The 3270 bridge provides an interface so that you can run 3270-based CICS
transactions without a 3270 terminal. In the bridge environment, terminal commands
are intercepted by CICS and passed to a bridge exit user-replaceable program.
The bridge exit provides the mechanism by which data needed to run a 3270
transaction can be sent and received from an external resource. For example, you
can use MQSeries® commands in a bridge exit so that CICS can GET and PUT
messages to MQSeries queues.
For a detailed description of the 3270 bridge exit and its interfaces, see the
CICS
External Interfaces Guide
.
© Copyright IBM Corp. 1977, 1999 599
|
- CICS Customization Guide 1
- Contents 5
- Contents v 7
- Contents vii 9
- Contents ix 11
- Contents xi 13
- Contents xiii 15
- Contents xv 17
- Trademarks 21
- What this book is about 23
- Who this book is for 23
- How to use this book 23
- Notes on terminology 23
- Bibliography 25
- Other CICS books 26
- Books from related libraries 26
- ACF/TCAM books 26
- MVS books 27
- VTAM books 27
- Other related books 27
- Summary of changes 29
- Summary of changes xxix 31
- Performance Guide 32
- Global user exit programs 36
- Register conventions 36
- Using CICS services 37
- The global work area 38
- Making trace entries 39
- DFHUEPAR standard parameters 40
- 12 (decimal) 41
- 12 (decimal) in this 41
- Returning values to CICS 42
- Errors in user exit programs 44
- The DFH$PCPI program: 47
- Sample program definitions: 48
- Resource Definition Guide 49
- CICS Shared Data 49
- Tables Guide 49
- Exit XAKUSER 57
- WRITE JOURNALNAME 58
- Important 58
- Basic Mapping Support exits 59
- Exit XBMIN 60
- Exit XBMOUT 60
- Programming the XBMIN exit 62
- Programming the XBMOUT exit 62
- Cumulative mapping operations 63
- Message routing 63
- Bridge facility exit 64
- Exit XFAINTU 64
- Exit XDTRD 65
- Exit XDTAD 68
- Exit XDTLC 69
- Exit XXDFB 72
- Exit XXDTO 73
- Exit XDSBWT 74
- Exit XDSAWT 74
- DL/I interface program exits 76
- Exit XDLIPRE 77
- Exit XDLIPOST 79
- Exit XDUREQ 81
- Exit XDUREQC 84
- Exit XDUCLSE 87
- Exit XDUOUT 87
- Exit XNQEREQ 89
- Exit XNQEREQC 90
- Sample exit program, DFH$XNQE 95
- The command parameter list 97
- Bypassing commands 98
- Exit XEIIN 98
- Exit XEISPIN 99
- Exit XEIOUT 100
- Exit XEISPOUT 100
- EXEC interface program exits 101
- Modifying input fields 107
- Modifying the EID 108
- Use of the parameter UEPFSHIP 109
- Exit XFCREQ 111
- Exit XFCREQC 112
- Example program 114
- Exit XFCAREQ 116
- Exit XFCAREQC 117
- Modifying user arguments 127
- Exit XFCSREQ 129
- Exit XFCSREQC 132
- Recovery and Restart Guide 137
- Exit XFCNREC 138
- Exit XFCVSDS 140
- file control quiesce send exit 142
- Order of invocation 144
- Migration note 149
- The XISCONA exit 159
- Exit XISCONA 160
- CICS Performance Guide 161
- The XISLCLQ exit 162
- Exit XICREQ 164
- Exit XICEXP 165
- Exit XICTENF 165
- XICEREQC 166
- Exit XICEREQ 166
- Exit XICEREQC 167
- Modifying output fields 174
- Using the task token UEPTSTOK 177
- CICS Intercommunication Guide 178
- Exit XLDLOAD 179
- Exit XLDELETE 180
- OS/390 MVS Authorized 181
- Exit XLGSTRM 182
- Message domain exit XMEOUT 184
- Exit XMEOUT 185
- Monitoring domain exit XMNOUT 188
- Exit XMNOUT 188
- XPCHAIR, XPCTA, and XPCABND 190
- XPCREQ and XPCREQC 190
- Exit XPCREQC 191
- Modifying input fields: 194
- Modifying output fields: 194
- In XPCREQ: 196
- In XPCREQC: 196
- Exit XPCFTCH 197
- Exit XPCHAIR 198
- Exit XPCTA 200
- Exit XPCABND 201
- Exit XRMIIN 203
- Exit XRMIOUT 204
- Exit XRSINDI 205
- Exit XSNON 209
- Exit XSNOFF 210
- UERCPURG 211
- Task purged during XPI call 211
- XPI calls 211
- All can be used 211
- Statistics domain exit XSTOUT 212
- Exit XSTOUT 212
- Exit XSRAB 214
- could be determined 215
- CICS Data Areas 216
- Exit XSTERM 218
- XTSPTOUT 219
- Exit XTSQRIN 219
- Exit XTSQROUT 220
- Exit XTSPTIN 222
- Exit XTSPTOUT 223
- XTSEREQC 225
- Exit XTSEREQ 226
- Exit XTSEREQC 227
- Command See 228
- WRITEQ TS Table 7 on page 200 228
- READQ TS Table 8 on page 200 228
- Adding user arguments 233
- Removing user arguments 233
- Exit XALCAID 235
- Exit XTCIN 237
- Exit XTCOUT 237
- Exit XTCATT 238
- Exit XTCTIN 238
- Exit XTCTOUT 239
- The exits 240
- Exit XALTENF 241
- Exit XXMATT 248
- Exit XTDREQ 250
- Exit XTDIN 251
- Exit XTDOUT 252
- XTDEREQC 253
- Exit XTDEREQ 253
- Exit XTDEREQC 255
- Coding the exit programs 262
- Enabling the exit programs 263
- Exit XRCINIT 264
- Exit XRCINPT 264
- Exit XZCATT 266
- Exit XZCIN 267
- Exit XZCOUT 267
- Exit XZCOUT1 268
- VTAM working-set module exits 269
- Exit XZIQUE 272
- Design considerations 275
- Sample exit program design 276
- Exit XXRSTAT 278
- The stub program 282
- Figure 5. The stub concept 283
- User exit parameter lists 285
- Caller parameter lists 289
- CICS task manager parameters: 292
- CICS EDF build parameters: 293
- The schedule flag word 297
- Saving CICS registers 298
- Addressing-mode implications 299
- Work areas 301
- CICS System 302
- Programming Reference 302
- Return codes 303
- Limitations 304
- Resynchronization 306
- (Part 1 of 2) 309
- (Part 2 of 2) 310
- ) and (E 311
- ) expressions in Figure 10 311
- Adapter administration 312
- The administration routines 313
- TRACETYPE command 314
- Overview 315
- General form of an XPI call 318
- DFHUEXIT TYPE=XPIENV 322
- XPI register usage 323
- The XPI copy books 323
- XPI examples 325
- The XPI functions 330
- OPTION(addr,len) 331
- OPTION(bufdname) 331
- OPTION(addr,maxlen,*) 331
- Dispatcher functions 332
- The ADD_SUSPEND call 334
- The SUSPEND call 336
- The RESUME call 339
- The DELETE_SUSPEND call 340
- The WAIT_MVS call 341
- CICS Problem Determination 343
- The CHANGE_PRIORITY call 345
- Dump control functions 346
- The SYSTEM_DUMP call 346
- RESPONSE REASON 347
- The TRANSACTION_DUMP call 348
- Enqueue domain functions 350
- The ENQUEUE function 350
- The DEQUEUE function 351
- Kernel domain functions 352
- Loader functions 353
- The DEFINE_PROGRAM call 353
- The ACQUIRE_PROGRAM call 357
- The RELEASE_PROGRAM call 359
- The DELETE_PROGRAM call 360
- Log manager functions 361
- The INQUIRE_PARAMETERS call 361
- The SET_PARAMETERS call 361
- Monitoring functions 362
- The MONITOR call 362
- CICS Resource Definition Guide 363
- Program management functions 366
- The INQUIRE_PROGRAM call 367
- Intercommunication Guide 368
- The SET_PROGRAM call 375
- The START_BROWSE_PROGRAM call 378
- The GET_NEXT_PROGRAM call 379
- The END_BROWSE_PROGRAM call 381
- The INQUIRE_AUTOINSTALL call 382
- The SET_AUTOINSTALL call 382
- State data access functions 384
- The INQ_APPLICATION_DATA call 384
- The INQUIRE_SYSTEM call 387
- The SET_SYSTEM call 391
- Storage control functions 393
- The GETMAIN call 393
- The FREEMAIN call 396
- The INQUIRE_ACCESS call 396
- INQUIRE_ELEMENT_LENGTH: 398
- The INQUIRE_TASK_STORAGE call 399
- The SWITCH_SUBSPACE call 400
- Trace control function 401
- The TRACE_PUT call 401
- The INQUIRE_CONTEXT call 402
- The INQUIRE_DTRTRAN call 403
- The INQUIRE_MXT call 404
- The INQUIRE_TCLASS call 406
- The INQUIRE_TRANDEF call 407
- The INQUIRE_TRANSACTION call 415
- The SET_TRANSACTION call 419
- User journaling function 420
- The WRITE_JOURNAL_DATA call 420
- Initialization programs 425
- First phase PLT programs 425
- Second phase PLT programs 426
- Shutdown programs 426
- General considerations 428
- Storage keys for PLT programs 428
- PLT programs—general 429
- IBM ESA/370 Principles of 433
- Operation 433
- CICS System Definition Guide 434
- CICS Recovery and 439
- Restart Guide 439
- Terminal control program 448
- Terminal error program 448
- The communication area 449
- TEP error table 450
- TEP default table 451
- Entry and initialization 452
- Error processor selection 452
- Error processing execution 452
- General exit 453
- Common subroutines 453
- DFHTEPM TYPE=USTOR 458
- DFHTEPM TYPE=USTOREND 458
- DFHTEPM macro examples 462
- DFHTEPT TYPE=INITIAL 464
- ,MAXTIDS=number 464
- [,MAXERRS={25 464
- [,OPTIONS={TIME 464
- Name Type Description Library 470
- CICSTS13.CICS.SDFHMAC 470
- increased by 473
- 8 in real TCTLE) 473
- USING DFHTCTTE,TCTTEAR 474
- DROP TCTLEAR 474
- USING DFHTCTLE,TCTLEAR 474
- CICS Intercommunication 481
- An overview of writing a NEP 483
- The default NEP 484
- The sample NEP 484
- Coding the sample NEP 485
- Multiple NEPs 487
- The sample node error program 497
- Entry section 498
- Routing mechanism 499
- Node error table 499
- Optional common subroutines 500
- Table 22. Register assignment 504
- Entry and addressability 508
- Coding for session failures 509
- Writing multiple NEPs 510
- DFHZNEPI macros 510
- CICS/ESA 3.3 XRF 512
- Changing the recovery message 514
- Preliminary considerations 517
- Coding entries for MTS 519
- SNA Network Product Formats 520
- Returning information to CICS 523
- CICS Resource Definition 524
- Setting the TERMINAL name 525
- WAS MODEL_NAME: mmmmmmmm 526
- CINIT BIND: cccccccc... 526
- MODEL BIND: bbbbbbbb... 526
- MISMATCH BITS: xxxxxxxx 526
- Testing and debugging 528
- Definition Guide 530
- Assembler language 531
- Leaving it all to CICS 537
- Benefits of autoinstall 546
- Requirements for autoinstall 546
- Recovery and restart 547
- Resource definitions 553
- CICS-generated aliases 556
- Autoinstall models 563
- Terminal identifiers 564
- Why override TERMIDs? 565
- Autoinstall model definitions 572
- System autoinstall 573
- Saving in virtual storage 573
- Faster startup times 574
- Resource definition 579
- Dynamic transaction routing 582
- Dynamic transactions 582
- Changing the program name 585
- CICS Application Programming 587
- Monitoring the output TIOA 588
- Unit of work considerations 589
- Changing the transaction ID 592
- ‘tranid’ 598
- Reference 599
- System Programming Reference 605
- CICS Business Transaction 611
- Services 611
- CICS System Programming 612
- External Interfaces Guide 631
- CICS Internet Guide 633
- Environment variables 635
- IBM ESA/370 Principles 640
- The sample overseer program 641
- The display function 642
- The restart-in-place function 643
- CICS Operations and 644
- Utilities Guide 644
- The DFHWOSM macros 646
- The DFHWOSM tokens 647
- DFHWOSM FUNC=BUILD macro 647
- DFHWOSM FUNC=CLOSE macro 648
- DFHWOSM FUNC=DSECT macro 648
- DFHWOSM FUNC=JJC macro 648
- DFHWOSM FUNC={JJS 649
- DFHWOSM FUNC=OPEN macro 650
- DFHWOSM FUNC=OSCMD macro 650
- DFHWOSM FUNC=READ macro 651
- DFHWOSM macros 652
- DFHWOSM FUNC=TERM macro 654
- Loop or wait detection 656
- IBM ESA/370 660
- Principles of Operation 660
- Log stream storage 661
- Primary storage 662
- Tertiary storage 662
- Secondary storage 662
- Fixed length 666
- Reserved 667
- Start-of-run record 668
- Format of caller data 668
- Variable length 669
- FLJB GENERAL DATA 672
- FLJB DELETE DATA 672
- Fixed length Variable length 672
- Base key Path key 672
- File-close record types 673
- Tie-up record types 674
- Terminal control prefix data 676
- FEPI prefix data 676
- System header 680
- User prefix Journal data 680
- System prefix 680
- Variable 682
- The SMF block header 686
- The CICS product section 686
- The CICS data section 687
- Chapter 24. CICS monitoring 689
- DFHMCT TYPE=EMP 691
- DFHMCT TYPE=RECORD 691
- Examples of MCT coding 692
- Exception class data 693
- Controlling CICS monitoring 694
- CICS Supplied Transactions 695
- OS/390 MVS System Management 697
- Facilities (SMF) 697
- CICS data section 698
- Performance data sections 704
- Exception data sections 706
- CICS Performance 707
- Chapter 25. CICS statistics 709
- Resetting statistics counters 713
- CICS statistics record format 714
- STSMFDS DFHSTSMF PREFIX=SMF 715
- CICS statistics data section 717
- CICS with TCAM SNA 724
- Protocol management 724
- Transaction control 725
- Batch processing 726
- Error processing 726
- The CICS-TCAM interface 727
- Data format 728
- Logic flow 729
- Segment processing 732
- Line pool specifications 733
- Line locking 734
- TCAM queues 735
- TCAM devices 736
- TCAM with 3270 devices 738
- TCAM user exits 739
- Starting and terminating TCAM 739
- CICS-TCAM startup 739
- CICS-TCAM abend and restart 739
- CICS-TCAM termination 740
- TCAM MCP 741
- CICS Application program 741
- Terminal operation 746
- Help feature 747
- DYNALLOC flow of control 749
- CICS RACF Security 752
- The MVS router 753
- The MVS router exit 754
- Router exit return codes 755
- ESM exit programs 756
- CICS security control points 759
- Early verification processing 761
- INCLUDE SYSLIB(DFHXSEAI) 763
- INCLUDE SYSLIB(DFHEAI) 763
- ENTRY verify-program 763
- *ASM XOPTS(NOPROLOG,NOEPILOG) 763
- What the sample program does 768
- An overview of DFHCSDUP 773
- DFHCSDUP as a batch program 774
- The EXTRACT command 774
- The sample EXTRACT programs 776
- The DB2 formatting program 778
- An assembler-language version 780
- A VS COBOL II version 781
- A PL/I version 782
- Entry parameters for DFHCSDUP 784
- The initialization exit 787
- The get-command exit 788
- The extract exit 789
- The put-message exit 791
- The sample program, DFH$CUS1 792
- COMMAREA(CEDAPARM) 793
- CICS Distributed 794
- Transaction Programming Guide 794
- DFHEDAP in a DTP environment 795
- Part 9. Appendixes 797
- TYPETERM device types 800
- VTAM MODEENT macro operands 802
- PSERVIC screen size values 807
- Messages and Codes 821
- CICS Messages and Codes 832
- (DFH$TDWT) 835
- Using the XZCIN exit 837
- Using DFHTCTDY 837
- TS data sharing messages 838
- Special Characters 855
- Numerics 855
- (continued) 856
- Index 827 859
- Sending your comments to IBM 873
- SC33-1683-02 874
- Spine information: 875
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