Advanced communication interface. ACI-based programming is the base technology of EntireX. It uses a traditional Application Programming Interface (API) approach for conducting client/server and peer-to-peer dialog between distributed processes.
This document describes the EntireX Broker ACI from the perspective of the programming language Natural. It covers the following topics:
Calls to EntireX Broker use the following arguments:
The ACI control block is the first argument.
The send buffer is the second argument.
The receive buffer is the third argument.
The error text buffer is the last argument. It can provide a short
text with the error code, if desired. Sufficient buffer length must be supplied
to allow the standard 40-byte-long message to be returned by EntireX Broker.
For ACI version 9 and above, the error text buffer can be greater than 40 bytes as
specified in the ACI field ERRTEXT-LENGTH.
The send buffer and the receive buffer must always be provided. If they are not required by the selected EntireX Broker function, you can set them as short A1 fields.
The API is called with a statement such as the following for all platforms:
CALL 'BROKER' #ETBCB #SEND-AREA #RECEIVE-AREA #ERROR-TEXT
Natural applications can access the last four bytes of the error code through the RET function.
If 00000000 (zeros) are returned in the ERROR-CODE field in the EntireX
Broker control block, the operation has been performed successfully. However,
function results other than 00000000 (zeros) do not necessarily indicate an
error. See Error Handling for client and server | publish and subscribe.
On UNIX and Windows, the length of fields #SEND-AREA and #RECEIVE-AREA cannot exceed 65535. If you want to send and/or receive more data,
redefine #SEND-AREA and/or #RECEIVE-AREA with a value of, say, A1 and use these fields in the CALL statement. For example:
01 #SEND-AREA (A65536) 01 REDEFINE #SEND-AREA 02 #SEND-AREA-R (A1) 01 #RECEIVE-AREA (A65536) 01 REDEFINE #RECEIVE-AREA 02 #RECEIVE-AREA-R (A1) . CALL 'BROKER' #ETB-CB #SEND-AREA-R #RECEIVE-AREA-R #ERROR-TEXT
The following table shows the Broker fields in the order of the physical layout of the Broker ACI control block and provides a brief description of each field. See the actual copycode for Natural below in Broker ACI Control Block Copycode.
See Broker ACI Fields for more information.
| Broker ACI Field | Natural Definition | Description / Related Information |
API Vers. |
Notes | |
|---|---|---|---|---|---|
API-TYPE |
#TYPE (I1) |
API type. | See API-TYPE and API-VERSION for client and server | publish and subscribe.
|
1 | |
API-VERSION |
#VERSION (I1) |
API version. | 1 | ||
FUNCTION |
#FUNCTION (I1) |
See Broker ACI Functions to perform Broker function. | 1 | ||
OPTION |
#OPTION (I1) |
See OPTION.
|
1 | ||
#RESERVED (I4/4) |
Reserved for future use. | 1 | 1 | ||
SEND-LENGTH |
#SEND-LEN (I4) |
Send length. | See Using Send and Receive Buffers for client and server | publish and subscribe. | 1 | |
RECEIVE-LENGTH |
#RECEIVE-LEN (I4) |
Receive length. | 1 | ||
RETURN-LENGTH |
#RETURN-LEN (I4) |
Return length. | 1 | ||
ERRTEXT-LENGTH |
#ERRTEXT-LEN (I4) |
Error text length. | 1 | ||
BROKER-ID |
#BROKER-ID (A32) |
Broker ID. See Using the Broker ID in Applications. | 1 | ||
SERVER-CLASSSERVER-NAMESERVICE |
#SERVER-CLASS (A32)#SERVER-NAME (A32)#SERVICE (A32) |
Service. See Control Block Fields and Verbs. | 1 | 3, 5 | |
USER-ID |
#USER-ID (A32) |
User ID. See USER-ID and TOKEN for client and server | publish and subscribe.
|
1 | ||
PASSWORD |
#PASSWORD (A32) |
Password. See Authentication. | 1 | 4,5 | |
TOKEN |
#TOKEN (A32) |
Reconnection token. See USER-ID and TOKEN for client and server | publish and subscribe.
|
1 | 3, 5 | |
SECURITY-TOKEN |
#SECURITY-TOKEN (B32) |
Security token. See Writing Applications using EntireX Security. | 1 | 4, 5 | |
CONV-ID |
#CONV-ID (A16) |
Conversation ID. See Conversational and Non-conversational Mode. | 1 | 3, 5 | |
WAIT |
#WAIT (A8) |
Wait value. See Blocked and Non-blocked Broker Calls for client and server | publish and subscribe. | 1 | 3, 5 | |
ERROR-CODE |
#ERROR-CODE (A8) |
Error code. See Error Handling for client and server | publish and subscribe and Error Messages and Codes. | 1 | ||
ENVIRONMENT |
#ENVIRONMENT (A32) |
Environment. See Using Internationalization for client and server | publish and subscribe. | 1 | 3, 5 | |
ADCOUNT |
#ADCOUNT (I4) |
Attempted delivery count. See Writing Applications: Units of Work. | 2 | ||
USER-DATA |
#USER-DATA (B16) |
Conversation User Data. See Managing Conversation Contexts. | 2 | 3, 5 | |
| Not used. | #MSG-ID (B32) |
Message ID. | 2 | 4, 5 | |
| Not used. | #MSG-TYPE (A16) |
Message type. | 2 | 3, 5 | |
NEWPASSWORD |
#NEWPASSWORD (B32) |
New password. See Authentication. | 2 | 4, 5 | |
| Not used. | #ADAPTER-ERROR (A8) |
Adapter error. | 2 | ||
CLIENT-UID |
#CLIENT-UID (A32) |
Client User ID. See Writing Applications using EntireX Security | 2 | ||
CONV-STAT |
#CONV-STAT (I1) |
Conversation status. See Conversational and Non-conversational Mode. | 2 | ||
STORE |
#STORE (I1) |
Persistence or non-persistence of a UOW. | See Writing Applications: Units of Work. | 2 | |
UOWSTATUS |
#UOWSTATUS (I1) |
UOW Status. | 3 | 3, 5 | |
UWTIME |
#UOWTIME (A8) |
UOW lifetime. | 3 | 3, 5 | |
UOWID |
#UOWID (A16) |
UOW unique identifier. | 3 | 3, 5 | |
USTATUS |
#USERSTATUS (A32) |
User status. | 3 | ||
UOW-STATUS-PERSIST |
#UOWSTATUSPERSIST (I1) |
Multiplier for persistent status lifetime. | 3 | 2 | |
LOCALE-STRING |
#LOCS (A40) |
Locale string. To be used to override or provide codepages. See Using Internationalization for client and server | publish and subscribe. | 4 | ||
FORCE-LOGON |
#FLOG (A1) |
Override Broker
AUTOLOGON. See Authentication.
|
6 | ||
ENCRYPTION-LEVEL |
#ENCL (I1) |
Encryption level. | See Writing Applications using EntireX Security. | 6 | 2 |
KERNELSECURITY |
#KERNELSECURITY (A1) |
Kernel security. | 7 | ||
COMMITTIME |
#COMMITTIME (A17) |
Commit time. See Writing Applications: Units of Work. | 7 | ||
COMPRESSLEVEL |
#COMPRESSLEVEL (A1) |
Compression level. See Data Compression for client and server | publish and subscribe. | 7 | ||
UWSTAT-LIFETIME |
#UWSTATUSLIFE (A8) |
Add value for persistent status
lifetime. See UWSTAT-LIFETIME.
|
8 | ||
TOPIC |
#TOPIC (A96) |
Topic name for publish and subscribe. | See Key ACI Field Names. | 8 | |
PUBLICATION-ID |
#PUBLICATION-ID (A16) |
Publication ID for publish and subscribe. | 8 | ||
CLIENT-ID |
#CLIENT-ID (I4) |
Returns to a server application
the unique instance number of a client application. It is returned on receipt
of a message (RECEIVE or SEND with WAIT). See also
Tracing for client and server | publish and subscribe.
|
9 | ||
LOG-COMMAND |
#LOG-COMMAND (A1) |
Log the current command. See also Programmatically Turning on Command Logging for client and server | publish and subscribe. | 9 | ||
CREDENTIALS-TYPE |
#CREDENTIALS-TYPE (A1) |
Indicates the credentials type to be used to authenticate a user. The default is to use user ID and password. Enter "1" to specify IAF authentication. | 9 | ||
VARLIST-OFFSET |
#VARLIST-OFFSET (I4) |
Internal Software AG field. | 10 | ||
LONG-BROKER-ID-LENGTH |
#LONG-BROKER-ID-LENGTH (I4) |
See LONG-BROKER-ID-LENGTH.
|
10 | ||
Notes:
The ACI control block definition is located in file NATDEF of the supplied application (SYSETB). See ACI Examples and LDAs for where it is provided on your platform:
* -------------------------------- - ---------- --------------------------------* * Product .....: EntireX Broker * Copyright ...: (c) Software AG 1997-2009 All rights reserved. * Version .....: ACI VERSION 9 * Description .: Natural language ACI control block definitions. * ..... * To call broker use CALL 'BROKER' #ETBCB ..... * To set CB fields use ASSIGN #SDPA-CB.#xxxx = ....... * ..... * * * * * * * * * * * * * * * * * * Attention * * * * * * * * * * * * * !!!!! * These statements do not work to CALL 'BROKER' #SDPA-CB(*) ..... * call the broker CALL 'BROKER' #SDPA-API ....... * * * * * * * * * * * * * * * * * * Attention * * * * * * * * * * * * * !!!!! * ..... * -------------------------------- - ---------- --------------------------------* * EntireX Broker API Function Constants --------------------- 1 #FCT-SEND I 1 1 #FCT-RECEIVE I 1 1 #FCT-UNDO I 1 1 #FCT-EOC I 1 1 #FCT-REGISTER I 1 1 #FCT-DEREGISTER I 1 1 #FCT-VERSION I 1 1 #FCT-LOGON I 1 1 #FCT-LOGOFF I 1 1 #FCT-SET I 1 1 #FCT-GET I 1 1 #FCT-SYNCPOINT I 1 1 #FCT-KVER I 1 1 #FCT-LOCT I 1 1 #FCT-SSLP I 1 1 #FCT-SEND-P I 1 1 #FCT-RCVE-P I 1 1 #FCT-SUBS-P I 1 1 #FCT-USUB-P I 1 1 #FCT-CNTL-P I 1 1 #FCT-RPLY-E I 1 * * EntireX Broker API Option Constants --------------------- 1 #OPT-MSG I 1 1 #OPT-HOLD I 1 1 #OPT-IMMED I 1 1 #OPT-QUIESCE I 1 1 #OPT-EOC I 1 1 #OPT-CANCEL I 1 1 #OPT-LAST I 1 1 #OPT-NEXT I 1 1 #OPT-PREVIEW I 1 1 #OPT-COMMIT I 1 1 #OPT-BACKOUT I 1 1 #OPT-SYNC I 1 1 #OPT-ATTACH I 1 1 #OPT-DELETE I 1 1 #OPT-EOCCANCEL I 1 1 #OPT-QUERY I 1 1 #OPT-SETSTATUS I 1 1 #OPT-ANY I 1 1 #OPT-TERMINATE I 1 1 #OPT-DURABLE I 1 1 #OPT-CHECKSVC I 1 * * EntireX Broker Conversation Status Constants -------------- 1 #CONVSTAT-NEW I 1 1 #CONVSTAT-OLD I 1 1 #CONVSTAT-NONE I 1 * * EntireX Broker Store Constants ---------------- 1 #STORE-OFF I 1 1 #STORE-BROKER I 1 1 #STORE-ON I 1 * * EntireX Broker Status Constants ---------------- 1 #STAT_OFF I 1 1 #STAT_STORED I 1 1 #STAT_DELIVERY-ATTEMP I 1 1 #STAT_DELIVERED I 1 1 #STAT_PROCESSED I 1 1 #STAT_DEAD I 1 * * EntireX Broker UOW Status Constants ---------------- 1 #RECV-NONE I 1 1 #RECEIVED I 1 1 #ACCEPTED I 1 1 #DELIVERED I 1 1 #BACKEDOUT I 1 1 #PROCESSED I 1 1 #CANCELLED I 1 1 #TIMEOUT I 1 1 #DISCARDED I 1 1 #RECV-FIRST I 1 1 #RECV-MIDDLE I 1 1 #RECV-LAST I 1 1 #RECV-ONLY I 1 * * EntireX Broker Locale String Constants --------------------- 1 #ETB-CODEPAGE-USE-DEFAULT A 5 * * EntireX Broker Force Logon Constants --------------------- 1 #FLOG-YES A 1 1 #FLOG-NO A 1 1 #FLOG-S A 1 * * EntireX Broker Encryption Level Constants --------------------- 1 #ENCLEVEL-NONE I 1 1 #ENCLEVEL-TO-BROKER I 1 1 #ENCLEVEL-TO-TARGET I 1 * * EntireX Broker KernelSecurity Constants --------------------- 1 #KERNEL-SECURITY-NO A 1 1 #KERNEL-SECURITY-YES A 1 1 #KERNEL-SECURITY-USER A 1 1 #KERNEL-SECURITY-LIGHT A 1 * * EntireX Broker Compression Level Constants --------------------- 1 #COMPRESS-LEVEL-0 A 1 1 #COMPRESS-LEVEL-1 A 1 1 #COMPRESS-LEVEL-2 A 1 1 #COMPRESS-LEVEL-3 A 1 1 #COMPRESS-LEVEL-4 A 1 1 #COMPRESS-LEVEL-5 A 1 1 #COMPRESS-LEVEL-6 A 1 1 #COMPRESS-LEVEL-7 A 1 1 #COMPRESS-LEVEL-8 A 1 1 #COMPRESS-LEVEL-9 A 1 1 #COMPRESS-LEVEL-NO A 1 1 #COMPRESS-LEVEL-YES A 1 * * EntireX Broker Credential Type Constants --------------------- 1 #CREDENTIAL-TYPE-UID-PWD I 1 1 #CREDENTIAL-TYPE-IAF I 1 * * EntireX Broker API Control Block Definition -------------------- * 1 #SDPA-CB B 109 (8) R 1 #SDPA-CB /* V1 2 #ETBCB A 1 /* V1 to pass CB to stub R 1 #SDPA-CB 2 #ETBAPI A 1 /* V1 don't use/deprecated R 1 #SDPA-CB 2 #SDPA-API /* V1 don't use/deprecated 3 #TYPE I 1 /* V1 type of ETBCB R 3 #TYPE 4 #API-TYPE I 1 /* V1 alternative name 3 #VERSION I 1 /* V1 version of ETBCB R 3 #VERSION 4 #API-VERSION I 1 /* V1 alternative name 3 #FUNCTION I 1 /* V1 function 3 #OPTION I 1 /* V1 option 3 #RESERVED I 4 (4) /* V1 reserved 3 #SEND-LEN I 4 /* V1 length of send data R 3 #SEND-LEN 4 #SEND-LENGTH I 4 /* V1 alternative name 3 #RECEIVE-LEN I 4 /* V1 max. len. rec. data R 3 #RECEIVE-LEN 4 #RECEIVE-LENGTH I 4 /* V1 alternative name 3 #RETURN-LEN I 4 /* V1 length of rec.data R 3 #RETURN-LEN 4 #RETURN-LENGTH I 4 /* V1 alternative name 3 #ERRTEXT-LEN I 4 /* V1 max. len. error text R 3 #ERRTEXT-LEN 4 #ERRTEXT-LENGTH I 4 /* V1 alternative name 3 #BROKER-ID A 32 /* V1 target broker ID 3 #SERVER-CLASS A 32 /* V1 part of service name 3 #SERVER-NAME A 32 /* V1 part of service name 3 #SERVICE A 32 /* V1 part of service name 3 #USER-ID A 32 /* V1 user ID of caller 3 #PASSWORD B 32 /* V1 password of caller R 3 #PASSWORD 4 #PASSWORD-C A 1 (32) 3 #TOKEN A 32 /* V1 special purposes 3 #SECURITY-TOKEN B 32 /* V1 security purposes R 3 #SECURITY-TOKEN 4 #SECURITY-TOKEN-C A 1 (32) 3 #CONV-ID A 16 /* V1 conv./non-conv. 3 #WAIT A 8 /* V1 blocked/non-blocked 3 #ERROR-CODE A 8 /* V1 error class/number R 3 #ERROR-CODE 4 #ERROR-CLASS N 4 /* V1 error class 4 #ERROR-NR N 4 /* V1 error number R 3 #ERROR-CODE 4 #ERROR-CODE-CLASS N 4 /* V1 alternative name 4 #ERROR-CODE-NR N 4 /* V1 alternative name 3 #ENVIRONMENT A 32 /* V1 translation purposes 3 #ADCOUNT I 4 /* V2 attempt deliv. count 3 #USER-DATA B 16 /* V2 user data field R 3 #USER-DATA 4 #USER-DATA-C A 1 (16) 3 #MSG-ID B 32 /* V2 not used by broker R 3 #MSG-ID 4 #MSG-ID-C A 1 (32) 3 #MSG-TYPE A 16 /* V2 not used by broker 3 #PTIME A 8 /* V2 not used by broker 3 #NEWPASSWORD B 32 /* V2 new passwd of caller R 3 #NEWPASSWORD 4 #NEWPASSWORD-C A 1 (32) 3 #ADAPTER-ERROR A 8 /* V2 not used by broker 3 #CLIENT-UID A 32 /* V2 userid for security 3 #CONV-STAT I 1 /* V2 conversation status 3 #STORE I 1 /* V2 flag for saving data 3 #STATUS I 1 /* V2 not used by broker 3 #UOWSTATUS I 1 /* V3 UOW's status R 3 #UOWSTATUS 4 #UOWSTA I 1 /* V3 don't use/deprecated 3 #UOWTIME A 8 /* V3 UOW lifetime in sec. R 3 #UOWTIME 4 #UOWTIM A 8 /* V3 don't use/deprecated 3 #UOWID A 16 /* V3 UOW ID 3 #USERSTATUS A 32 /* V3 user status R 3 #USERSTATUS 4 #USRSTA A 32 /* V3 don't use/deprecated 3 #UOWSTATUSPERSIST I 1 /* V3 UOW st. persist flag R 3 #UOWSTATUSPERSIST 4 #UOWSTP I 1 /* V3 don't use/deprecated 3 #UOWFILLER A 3 /* V3 alignment R 3 #UOWFILLER 4 #FILL A 3 /* V3 don't use/deprecated 3 #LOCS A 40 /* V4 callers set locale 3 #DARCH I 1 /* V4 for future use 3 #FLOG A 1 /* V6 force logon 3 #ENCL I 1 /* V6 end-to-end encryptn. 3 #KERNELSECURITY A 1 /* V7 security indicator 3 #COMMITTIME A 17 /* V7 UOW commit time 3 #COMPRESSLEVEL A 1 /* V7 compression level 3 #RESERVED3 B 2 /* V7 alignment 3 #RESERVED4 B 4 /* V7 reserved for future 3 #UWSTATUSLIFE A 8 /* V8 UOWStLifeTime:adder 3 #TOPIC A 96 /* V8 topic name 3 #PUBLICATION-ID A 16 /* V8 publication ID 3 #PARTNER-BROKER-ID A 32 /* V9 partner broker ID 3 #RESERVED-V73-1 I 4 /* V9 reserved for future R 3 #RESERVED-V73-1 4 #EXTENSION-SEND-LENGTH I 4 /* V9 don't use/deprecated 3 #RESERVED-V73-2 I 4 /* V9 reserved for future R 3 #RESERVED-V73-2 4 #EXTENSION-RECEIVE-LENGTH I 4 /* V9 don't use/deprecated 3 #RESERVED-V73-3 I 4 /* V9 reserved for future R 3 #RESERVED-V73-3 4 #EXTENSION-RETURN-LENGTH I 4 /* V9 don't use/deprecated 3 #CLIENT-ID I 4 /* V9 unique client ID 3 #RESERVED-V73-4 A 32 /* V9 reserved for future R 3 #RESERVED-V73-4 4 #SERVER-REPLICATION-GROUP A 32 /* V9 don't use/deprecated 3 #LOG-COMMAND A 1 /* V9 broker cmd logging 3 #CREDENTIALS-TYPE A 1 /* V9 credential type 3 #RESERVED-V73-5 A 32 /* V9 reserved for future R 3 #RESERVED-V73-5 4 #VERIFIED-USERID A 32 /* V9 don't use/deprecated 3 #RESERVED5 B 2 /* V9 alignment
When you begin to write your first EntireX Broker ACI program, you can use Example 11: Model to write Client/Server Programs API Version 1 or Example 12: Model to write Client/Server programs API Version 2 as a model for your own implementation. If the examples are not available on your platform, transfer them (for example using FTP) from a platform where they are delivered.
For Natural you will find the files with the examples, copybooks, etc. in the following locations:
Notes:
Writing ACI Servers for the RPC-ACI Bridge in Natural - Overview of tasks and supported data types when writing server applications in Natural.
Writing Applications: Publish and Subscribe - How to implement and program publish-and-subscribe applications, employing durable subscription techniques, with EntireX Broker.
Writing Applications: Client and Server - How to implement and program client-and-server applications with EntireX Broker.
Writing Applications: Units of Work - Describes the concept of units-of-work programming for EntireX Broker.
Writing Applications: Attach Server - Describes the programming of Attach Server for EntireX Broker. It assumes you are familiar with the basics of EntireX Broker ACI programming.
Writing Applications: Command and Information Services - EntireX Broker provides an API for Command and Information Services (CIS) that include the following: shutting down servers; switching trace on and off; retrieving information on clients; registered servers and services.
Broker CIS Data Structures - Describes the data structures of the Command and Information Services.
Writing Applications using EntireX Security - Programming aids relevant to EntireX Security programming.
Broker ACI Fields - Describes the fields in the EntireX Advanced Communication Interface (ACI) that define Broker functions to be performed.
Broker ACI Functions - Describes the EntireX Broker ACI functions.
Broker UOW Status Transition - Contains the UOW Status transition tables for EntireX Broker.
Using the Broker ID in Applications - Describes the URL-style broker ID and transport-method-style broker ID.
