Analysis results

What results can you expect?

Once the analysis/snapshot generation has completed, you can view the results in the normal manner (for example via CAST Enlighten):

Objects

Cobol

JCL

IMS

CICS

Links

Cobol

For Embedded SQL links, the following are valid for all servers.

For link types CALL PROG and CALL TRANSAC, two limitations exist when the call is in “string” form:

• If the string is constant and declared in the “data-division” section, the entry point will be resolved in the normal way.
• If the string is dynamic, the program may be found by the Dynamic Link Manager.

In addition, the following Embedded SQL links are valid for DB2 only:

JCL

IMS

CICS

For Transactional Code, the following are valid:

Miscellaneous Cobol information

Rules for resolving Paragraph names in a Section

The Mainframe Analyzer (Cobol) uses the following rules when resolving Paragraph names defined in Sections:

1. If the referenced Paragraph is located in the current Section, Cobol Analyzer will link the calling Paragraph to the called Paragraph
2. If the referenced Paragraph is not located in the current section, Cobol Analyzer will issue a syntax error
3. If the referenced Paragraph has a unique declaration outside the Section, Cobol Analyzer will create a link to this Paragraph.
4. The following syntax is also resolved: “Paragraph Name IN/OF Section Name”. A link will be created to the correct Paragraph (which will be outside the current Section).

Access type links

Access type links are created when your Cobol program calls an external file (Data Set).

1. The instructions that manage classic files (‘File Link’ type) are:

   Instructions for opening a file: OPEN Reading data: READ Writing data: WRITE, REWRITE Closing the file: CLOSE

2. Sorting operations on data set files (Data Link type) are carried out via the instructions MERGE and/or SORT. These instructions should generate CALL + PERFORM type links on paragraphs or sections. OPEN and CLOSE instructions are also used.

3. Access (Read/Write) links to “Cobol Constants” and “Cobol Data”:

   • Variables used in the flow control: IF, PERFORM, EVALUATE, SEARCH.
   • Inclusion of the instructions: MOVE, INITIALIZE, SET, CALL, OPEN, CLOSE, READ, WRITE, REWRITE, MERGE, SORT.
   • The following instructions are not yet included: MULTIPLY, SUBTRACT, ADD, DIVIDE, EXHIBIT.

4. CICS files read via CICS instructions in an EXEC CICS … END-EXEC

   • Opening of file - Instructions: STARTBR – Acesse(Open) on the file
   • Data reading - Instructions: DELETE, WRITE, REWRITE – Access(Write)
   • Closing of file - Instruction: ENDBR – Access(Close)

5. Access to the segment in the IMS databases:

   • Links to the segment (Access + Write/Read)
   • Links to the Program Specification Block

File Selection

Logical Files are declared in the “File Section” part of the program with the FD or SD tag.

• FD: declaration of  ‘file link’ type
• SD: declaration of ‘data link’ type

Example declaration of a logical file called MAIL-XREF (type FILE-LINK) in the Cobol program:

004600 FILE SECTION.                          00015900
004700                                          00016000
009000 FD MAIL-XREF                             00020700
009100 LABEL RECORDS ARE STANDARD               00020800
009200 BLOCK CONTAINS 0 RECORDS.                00020900
009300 01 MAIL-XREF-REC.                        00021000
009400 03 MAIL-XREF-KEY.                        00021100
009500 07 MAIL-XREF-ADDRESS.                    00021200
009600 11 MAIL-XREF-ZIP-PRE PIC X(05).          00021300
009700 11 MAIL-XREF-ZIP-SUF PIC X(04).          00021400
009800 07 MAIL-XREF-STATE PIC X(03).            00021500
009900 07 MAIL-XREF-CITY PIC X(25).             00021600
010000 07 MAIL-XREF-POSTAL-CODE PIC X(02).      00021700
010100 03 MAIL-XREF-DATA PIC X(324).            00021800

Replacement used in COPY REPLACING directives

• Replacements can be applied to words or parts of words
• Patterns used to replace parts of words must be delimited by the following characters:  :, (, ), \ or "
• Patterns that are not delimited by the above characters are considered as being used to replace entire words
• LEADING and TRAILING clauses mean that the replacement will be applied on parts of words and as such, patterns must respect rule two (first character and last character will be removed from the pattern).

Miscellaneous JCL Information

JCL is a command language used to execute programs on large systems - primarily Cobol oriented. CAST’s Mainframe Analyzer (JCL) is targeted at IBM’s JCL language for 3090 systems used in conjunction with Cobol projects.

Display in CAST Enlighten

In CAST Enlighten, a full Mainframe Analysis (i.e. including COBOL, JCL, CICS and IMS) may be represented as follows:

COBOL Objects branch - if the data has NOT been saved in the Analysis Service (Data Structures > Save Data Only option in the Mainframe Technology options is not activated). Note that the Cobol Copybooks and its sub-heading Data in the Source file folders heading will only be visible if the Save data found in copy books option in the Mainframe Technology options  is activated):

COBOL Objects branch - if the data has been saved in the Analysis Service (Data Structures > Save Data Only option in the Mainframe Technology options is activated). Note that the Cobol Copybooks and its sub-heading Data in the Source file folders heading will only be visible if the Save data found in copy books option in the Mainframe Technology options  is activated):

JCL Objects branch

CICS Objects branch

IMS Objects branch

Changes introduced in Mainframe Analyzer 1.1

New object “Cobol SQL Query”

For each embedded SQL statement found in Cobol (except INCLUDE statements which are already supported by creating a Copy Book object), an object called Cobol SQL Query is created. For example, the following code will cause this object type to be created:

EXEC SQL
    SELECT ABCDED
    FROM TABLE
END-EXEC

ReferLink between paragraphs/sections

A ReferLink will now be added between sections/paragraphs containing the CICS command HANDLE ABEND LABEL and the sections/paragraphs specified in the LABEL clause. For example:

Click to enlarge

In the same way, a ReferLink is added for the CICS commands HANDLE AID and HANDLE CONDITION:

Click to enlarge

Supported conditions

Below is a list of the conditions supported by the Mainframe Analyzer ≥ 1.1:

Changes introduced in Mainframe Analyzer 1.2

Support for CICS Webservices

Introduction

Web services make the interactions between programs over a network. There are two types of CICS Webservice:

• Provider: CICS acting as server to provide information
• Requester: CICS acting as client to request information

For example:

Click to enlarge

The items highlighted with a green oval represent the new objects and the new links to existing Mainframe type objects. Where:

• Cob program ECHOCLNT: client program to invoke the cob program which handles the CICS Webservice  
• Cob program ECHOPROG: the cob program which handles the CICS Webservice as a Provider
• Cob program ECHOWEBS: the cob program which handles the CICS Webservice as a Requester
• CICS Webservice and Call to CICS Webservice: new objects which represents CICS webservice support 
• JCL Step LS2WS: JCL step which run a Webservice utility batch to create a web service provider in CICS
• JCL Step WS2LS: JCL step which run a Webservice utility batch to create a web service requester in CICS

Example Provider Webservice

SAMPLE1.jcl job has the LS2WS step which run the DFHLS2WS webservice utility and exposed ECHOPROG cob program as a Webservice Provider:

//LS2WS   EXEC DFHLS2WS,                                                        
//    JAVADIR='java142s/J1.4',                                                  
//    USSDIR='cics650',                                                         
//    PATHPREF='',                                                              
//    TMPDIR='/tmp',                                                            
//    TMPFILE='ls2ws'                                                           
//INPUT.SYSUT1 DD *                                                             
LOGFILE=<Install_Directory>/ca1p/wsbind/provider/*                              
echoProgProviderBatch.log                                                       
PDSLIB=//<INSTALL_HLQ>.CA1P.COBCOPY                                             
REQMEM=ECHOCOMM                                                                 
RESPMEM=ECHOCOMM                                                                
LANG=COBOL                                                                      
PGMNAME=ECHOPROG                                                                
URI=ca1p/echoProgProviderBatch                                                  
PGMINT=COMMAREA                                                                 
WSBIND=<Install_Directory>/ca1p/wsbind/provider/*                               
echoProgProviderBatch.wsbind                                                    
WSDL=<Install_Directory>/ca1p/wsdl/echoProgProviderBatch.wsdl                   
MAPPING-LEVEL=1.2    

The parameter PGMNAME specifies the name of the cob program that will be exposed as a web service. The parameter URI specifies the URI link for the web service. An object CICS Webservice with the name as URI is created and linking with the Cobol Program which is the handle of CICS Webservice as a Provider.

Example Requester Webservice

SAMPLE2.jcl job has the WS2LS step which run the DFHWS2LS webservice utility and exposed ECHOWEBS cob program as a Webservice Requester:

//WS2LS   EXEC DFHWS2LS,                                                        
//    JAVADIR='java142s/J1.4',                                                  
//    USSDIR='cics650',                                                         
//    PATHPREF='',                                                              
//    TMPDIR='/tmp',                                                            
//    TMPFILE='WS2LS'                                                           
//INPUT.SYSUT1 DD *                                                             
LOGFILE=<Install_Directory>/ca1p/wsbind/requester/*                             
echoProgRequesterBatch.log                                                      
PDSLIB=//<INSTALL_HLQ>.CA1P.COBCOPY                                             
REQMEM=ECHOPI                                                                   
RESPMEM=ECHOPO                                                                  
LANG=COBOL                                                                      
WSBIND=<Install_Directory>/ca1p/wsbind/requester/*                              
echoProgRequesterBatch.wsbind                                                   
WSDL=<Install_Directory>/ca1p/wsdl/echoProgRequesterBatch.wsdl                  
MAPPING-LEVEL=1.2  

ECHOWEBS.cob must consist of a CICS invoke webservice command linking to the same webservice resource echoProgRequesterBatch in the above code:

MOVE 'echoProgRequesterBatch'                                        
             TO WS-WEBSERVICE-NAME 
EXEC CICS INVOKE WEBSERVICE(WS-WEBSERVICE-NAME)                      
             CHANNEL(WS-CHANNEL-NAME)                                           
             OPERATION(WS-OPERATION-NAME)                                       
             RESP(COMMAND-RESP) RESP2(COMMAND-RESP2)                            
END-EXEC                                                 

echoProgRequesterBatch.wsdl is the webservice resource file which must consist the URI for webservice:

<service name="ECHOPROGService">
      <port binding="tns:ECHOPROGHTTPSoapBinding" name="ECHOPROGPort">
         <!--This soap:address indicates the location of the Web service over HTTP.
              Please replace "my-server" with the TCPIP host name of your CICS region.
              Please replace "my-port" with the port number of your CICS TCPIPSERVICE.-->
         <soap:address location="http://my-server:my-port/ca1p/echoProgProviderBatch"/>
         <!--This soap:address indicates the location of the Web service over HTTPS.-->
         <!--<soap:address location="https://my-server:my-port/ca1p/echoProgProviderBatch"/>-->
         <!--This soap:address indicates the location of the Web service over WebSphere MQSeries.
              Please replace "my-queue" with the appropriate queue name.-->
         <!--<soap:address location="jms:/queue?destination=my-queue&connectionFactory=()&targetService=/ca1p/echoProgProviderBatch&initialContextFactory=com.ibm.mq.jms.Nojndi" />-->
      </port>
 </service>

An object Call To CICS Webservice with the name as URI is created and linking with cobol program/section which invoke CICS Webservice.

Linking CICS Webservice objects and Call To CICS Webservice objects

The CICS Webservice object and Call To CICS Webservice object have the same URI for linking purposes.

Configuration

In order for CAST to be able to fully support CICS Webservices, the extension *.wsdl must be manually added to the CICS File Extensions option in the configuration of Mainframe extension in CAST Console:

Note: this file extension .wsdl will be added to the CICS File Extensions option by default in a future release of AIP Core.

Links to RPG objects

Cobol File Link objects will link to DDS Display File /DDS Printer File/ DDS Physical File / DDS Logical File of RPG which has the same object name:

Links to Cobol Program objects

Support EXEC CICS LOAD PROGRAM

A useLink link will added from Cobol Section objects to Cobol Program objects when the EXEC CICS LOAD PROGRAM statement is used:

EXEC CICS LOAD PROGRAM ('ME00000B')

Support EXEC CICS HANDLE ABEND PROGRAM

A referLink will be added from Cobol Section objects to Cobol Program objects when the EXEC CICS HAND ABEND PROGRAM statement is used:

EXEC CICS HANDLE ABEND PROGRAM ('ME00000A')

Support INDEX BY

A new object type Cobol Index is created with a RelyON Link to cobol data using INDEX BY statement, other links are created to the new Cobol Index Object when it is referenced:

15 T-BUCH-VAR          OCCURS 1000  ASCENDING KEY
                                  T-BUCH-ST-2-20
                       INDEXED BY I-BUCH.

...

D0200.
           SET I-BUCH TO 1.
      
D0202.
           MOVE T-BUCH-VAR (I-BUCH) TO V-BUCH.

Support PROCESSING PROCEDURE

Link between paragraphs is created when they are referenced in PROCESSING PROCEDURE statement:

 1300-XML-PARSE.                                          
             XML PARSE WS-INT-XML-RESPONSE                                      
                       ( 1 : WS-INT-XML-RESPONSE-LEN )                          
                 PROCESSING PROCEDURE                                           
                   1350-XMLEVENT-HANDLER THRU 1350-EXIT 
             END-XML                                            

Changes introduced in Mainframe Analyzer 1.3

New object “IMS SQL Query”

For each embedded IMS SQL statement found in Cobol, an object called IMS SQL Query is created. For example, the following code will cause this object type to be created:

ENTERING-THE-PROGRAM.                                            
EXEC SQLIMS                                                  
FETCH cursor-name INTO :HOSPITAL-RESULT-ROW               
END-EXEC

Changes introduced in Mainframe Analyzer 1.4

Add links from “IMS SQL Query” to “IMS Segment”