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April 15, 2014

How to Send a Message to an Apache ActiveMQ Topic with GNU COBOL

百度扎实推进“两学一做”学习教育常态化制度化，推动机关党组织和党员干部持续用党章党规规范言行，用党的创新理论武装头脑、补钙壮骨、凝心聚力，更加自觉地为实现新时代党的历史使命不懈奋斗。

ACTIVEMQSAMPLE.cbl

IDENTIFICATION DIVISION.

PROGRAM-ID. ACTIVEMQSAMPLE.

ENVIRONMENT DIVISION.

CONFIGURATION SECTION.

DATA DIVISION.

WORKING-STORAGE SECTION.

COPY EZADATA.

PROCEDURE DIVISION.

PERFORM EZA-INITAPI.

PERFORM EZA-SOCKET.

MOVE 61613 TO EZA-NAME-PORT.

PERFORM EZA-CONNECT.

MOVE 'CONNECT' & X'0A' & X'0A' & X'00' TO EZA-BUFFER.

MOVE 10 TO EZA-NBYTE.

PERFORM EZA-SEND.

MOVE 'SEND' & X'0A' & 'destination:/topic/SampleTopic' & X'0A' & X'0A' & 'Simples Assim' & X'00' TO EZA-BUFFER.

MOVE 51 TO EZA-NBYTE.

PERFORM EZA-SEND.

MOVE 'DISCONNECT' & X'0A' & X'0A' & X'00' TO EZA-BUFFER.

MOVE 13 TO EZA-NBYTE.

PERFORM EZA-SEND.

PERFORM EZA-CLOSE.

PERFORM EZA-TERMAPI.

GOBACK.

COPY INITAPI.

COPY SOCKET.

COPY CONNECT.

COPY SEND.

COPY CLOSE.

COPY TERMAPI.

EZADATA.cpy

01 EZA-CALL-DATA.
  05 EZA-FUNCTION PIC X(16).
  05 EZA-AF PIC S9(9) COMP.
  05 EZA-BACKLOG PIC S9(9) COMP.
  05 EZA-CLIENT.
    10 EZA-CLIENT-DOMAIN PIC S9(9) COMP.
    10 EZA-CLIENT-NAME PIC X(8).
    10 EZA-CLIENT-TASK PIC X(8).
    10 FILLER PIC X(20).
  05 EZA-COMMAND-X.
    10 EZA-COMMAND PIC S9(9) COMP.
  05 EZA-FLAGS PIC S9(9) COMP.
  05 EZA-HOSTADDR PIC X(4).
  05 EZA-HOSTENT POINTER.
  05 EZA-HOW PIC S9(9) COMP.
  05 EZA-IDENT.
    10 EZA-IDENT-TCPNAME.
        15 EZA-IDENT-TAG PIC X(6).
        15 EZA-IDENT-SYSID PIC X(2).
    10 EZA-IDENT-ADSNAME PIC X(8).
  05 EZA-MAXSNO PIC S9(9) COMP.
  05 EZA-MAXSOC PIC S9(4) COMP.
  05 EZA-MAXSOC-SELECT PIC S9(9) COMP.
  05 EZA-NAME.
    10 EZA-NAME-FAMILY PIC S9(4) COMP.
    10 EZA-NAME-PORT PIC 9(4) COMP.
    10 EZA-NAME-IPADDRESS PIC X(4).
    10 FILLER PIC X(8).
  05 EZA-NAMELEN PIC S9(8) COMP.
  05 EZA-NBYTE PIC S9(9) COMP.
  05 EZA-OPTLEN PIC S9(9) COMP.
  05 EZA-OPTNAME PIC S9(9) COMP.
  05 EZA-OPTVALUE PIC X(16).
  05 EZA-PROTO PIC S9(9) COMP.
  05 EZA-RETCODE PIC S9(9) COMP.
  05 EZA-S-X.
    10 EZA-S PIC S9(4) COMP.
    10 EZA-S-ACCEPT PIC S9(4) COMP.
  05 EZA-SOCRECV PIC S9(4) COMP.
  05 EZA-SOCTYPE PIC S9(9) COMP.
    88 EZA-SOCTYPE-STREAM VALUE +1.
    88 EZA-SOCTYPE-DATAGRAM VALUE +2.
  05 EZA-SUBTASK PIC X(8).
  05 EZA-TIMEOUT.
    10 EZA-TIMEOUT-SECONDS PIC S9(9) COMP.
    10 EZA-TIMEOUT-MICROS PIC S9(9) COMP.
  05 EZA-NAME-STR PIC X(255).
  05 EZA-PROGRAM PIC X(8).
  05 EZA-IOVCNT PIC 9(8) COMP.
  05 EZA-ERRNO PIC S9(9) COMP.
    88 EZA-ERRNO-EAFNOSUPPORT VALUE 97.
    88 EZA-ERRNO-ENAMETOOLONG VALUE 36.
    88 EZA-ERRNO-EINVAL VALUE 22.
    88 EZA-ERRNO-EPROTOTYPE VALUE 91.
    88 EZA-ERRNO-EACCES VALUE 13.
    88 EZA-ERRNO-EADDRINUSE VALUE 98.
    88 EZA-ERRNO-ENOTSOCK VALUE 88.
    88 EZA-ERRNO-EADDRNOTAVAIL VALUE 99.
    88 EZA-ERRNO-EBADF VALUE 9.
    88 EZA-ERRNO-EOPNOTSUPP VALUE 95.
    88 EZA-ERRNO-ECONNREFUSED VALUE 111.
    88 EZA-ERRNO-EISCONN VALUE 106.
    88 EZA-ERRNO-ENETUNREACH VALUE 101.
    88 EZA-ERRNO-EPROTONOSUPPORT VALUE 93.
    88 EZA-ERRNO-EAGAIN VALUE 11.

01 EZA-BUFFER PIC X(1000).

01 EZA-IOV.
  03 EZA-IOV-ENTRY OCCURS 4 TIMES.
    05 EZA-IOV-BUFFER USAGE IS POINTER.
    05 EZA-IOV-RESERVED PIC X(4).
    05 EZA-IOV-BUFFER-LEN PIC 9(8) COMP.

01 EZA-MSG.
  05 EZA-MSG-NAME USAGE IS POINTER.
  05 EZA-MSG-NAMELENGTH USAGE IS POINTER.
  05 EZA-MSG-IOV USAGE IS POINTER.
  05 EZA-MSG-IOVCNT USAGE IS POINTER.
  05 EZA-MSG-ACCRIGHTS USAGE IS POINTER.
  05 EZA-MSG-ACCRLEN USAGE IS POINTER.

01 ABEND-INFORMATION.
  05 ABEND-CODE PIC 9(4) VALUE ZEROS.

INITAPI.cpy

EZA-INITAPI SECTION.
  MOVE 'INITAPI' TO EZA-FUNCTION.

  CALL 'EZASOKET' USING EZA-FUNCTION EZA-MAXSOC EZA-IDENT EZA-SUBTASK EZA-MAXSNO EZA-ERRNO EZA-RETCODE.

SOCKET.cpy

EZA-SOCKET SECTION.
  MOVE 'SOCKET' TO EZA-FUNCTION.

  MOVE 2 TO EZA-AF. *> IPV4

  MOVE 1 TO EZA-SOCTYPE. *> TCP

  CALL 'EZASOKET' USING EZA-FUNCTION EZA-AF EZA-SOCTYPE EZA-PROTO EZA-ERRNO EZA-RETCODE.

  MOVE EZA-RETCODE TO EZA-S.

CONNECT.cpy

EZA-CONNECT SECTION.
  MOVE 'CONNECT' TO EZA-FUNCTION.

  MOVE 2 TO EZA-NAME-FAMILY. *> IPV4

  MOVE LOW-VALUES TO EZA-NAME-IPADDRESS. *> NULL

  CALL 'EZASOKET' USING EZA-FUNCTION EZA-S EZA-NAME EZA-ERRNO EZA-RETCODE.

  MOVE EZA-S TO EZA-S-ACCEPT.

SEND.cpy

EZA-SEND SECTION.
  MOVE 'SEND' TO EZA-FUNCTION.

  CALL 'EZASOKET' USING EZA-FUNCTION EZA-S-ACCEPT EZA-FLAGS EZA-NBYTE EZA-BUFFER EZA-ERRNO EZA-RETCODE.

CLOSE.cpy

EZA-CLOSE SECTION.
  MOVE 'CLOSE' TO EZA-FUNCTION.

  CALL 'EZASOKET' USING EZA-FUNCTION EZA-S-ACCEPT EZA-ERRNO EZA-RETCODE.

TERMAPI.cpy

EZA-TERMAPI SECTION.
  MOVE 'TERMAPI' TO EZA-FUNCTION.

  CALL 'EZASOKET' USING EZA-FUNCTION.

Software

Apache ActiveMQ, COBOL, GNU COBOL, Messaging

Posted by:

Fernando Ribeiro

Experienced tech executive with a 24-year track record in enterprise computing. Leading AWS’s professional services application modernization division in Brazil. He’s held diverse roles including management, solutions architecture, sales consultancy, and full-stack development at major players like Oracle, Red Hat, and IBM. Fernando also contributes to open source and writes about emerging technologies. The views expressed here are his own and do not necessarily reflect the views of AWS.

3 responses to “How to Send a Message to an Apache ActiveMQ Topic with GNU COBOL”

Scott Stimson

January 14, 2019 at 1:51 pm

I created a CICS COBOL program based on this GNU COBOL program to use EZASOKET to send messages to an ActiveMQ Topic on a Linux server. All firewall rules are set up. No more error messages occur. EBCDIC to ASCII translations have been meticulously reviewed to make sure what appears on the server matches that of the intention of the GNU COBOL program. Network Wireshark has been viewed to see the data is getting to the server into the right port and hand shake is happening. The data never appears in the topic. The only message we get anywhere is a warning indicating a 1 GB Frame size exceeds the 100 MB Frame size limit, and we cannot see where that is indicated. Other previously set up sources can write to the topic. Any suggestions?
Fernando Ribeiro

January 15, 2019 at 9:20 am

I am afraid not, as I don’t have the test environment anymore to help you to debug it.

Anyway, thanks for reading the blog!
Scott Stimson

February 1, 2019 at 6:23 pm

Thank you. I was successful in setting up that COBOL program in z/OS Mainframe CICS, making calls to IBM’s EBCDIC to ASCII translator program EZACIC14 to convert all pieces of data that get placed in the EZA-BUFFER before placing it there, bypassing the line feed bytes that must be moved there separately. Then we had to make sure the Topic was set up to be able to receive from Mainframe CICS Sockets, which it can’t seem to do when set up to receive from Java or any other source. So in case anyone asks, that approach is workable and successful.

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How to Send a Message to an Apache ActiveMQ Topic with GNU COBOL

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3 responses to “How to Send a Message to an Apache ActiveMQ Topic with GNU COBOL”

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