Pathway Application Programming I (COBOL) Training in Denmark

• Concepts and Facilities course
• Six months of COBOL programming experience

Recommended:

• Knowledge of ANSI-standard SQL, if you plan to perform the NonStop SQL labs

Audience

• Application programmers who will be developing applications using the Pathway product.

Pathway introduction · Online transaction processing (OLTP) in the NonStop server environment

• Requester-server approach to online transaction processing
• Pathway application and its role in online transaction processing
• Components of a Pathway environment
• Starting PATHMON and PATHCOM
• Client/server options available in the Pathway environment

Pathway configuration and operation

• Starting PATHMON and PATHCOM
• Difference between global and object-specific configuration parameters
• Configuring global and object-specific parameters
• Cold starting and cool starting a Pathway system
• Starting the Pathway objects individually
• Monitoring and maintaining a Pathway system
• Shutting down a Pathway system
• Capturing the configuration specifications for the current Pathway environment

Lab Exercise (30 minutes):

• Establish your individual lab environment and practice starting and shutting down a Pathway application environment

Lab Exercise (1 hour):

• Create, start, and exit from a Pathway application environment
• Configure Pathway TCP, TERM, PROGRAM, and SERVER objects
• Display Pathway object attributes and information
• Shut down a Pathway application environment

Lab Exercise (1 hour):

• Manage and monitor a Pathway application environment
• Capture the current Pathway configuration parameters

SCREEN COBOL requesters · Steps a programmer performs to develop a SCREEN COBOL requester

• Several functions of SCREEN COBOL
• Similarities and differences between SCREEN COBOL and COBOL
• Components of a basic SCREEN COBOL program
• Writing basic SCREEN COBOL statements to display and accept data
• Writing basic SCREEN COBOL statements to communicate with other requester programs
• Using the SCREEN COBOL Utility Program (SCUP) to maintain pseudo-object libraries

Lab Exercise (1 hour):

• Lay out and use a SCREEN COBOL screen
• Define fields and attributes that make up a SCREEN COBOL screen additional SCREEN COBOL topics
• Writing basic SCREEN COBOL statements to communicate with server programs
• Coding SCREEN COBOL verbs to enhance screen displays
• Basic functions of TM/MP (Transaction Monitoring Facility, TMF) software
• Writing SCREEN COBOL statements for a requester to operate in a TM/MP environment
• Defining and using overlay screens in SCREEN COBOL

Lab Exercise (1.5 hours):

• Code SCREEN COBOL requester programs
• Code ACCEPT, PERFORM ONE, and CALL statements

Inspect debugging · Basic syntax and use of common Inspect commands used to debug programs

• Necessary steps to debug a stand-alone process
• Necessary steps to debug a SCREEN COBOL requester
• Necessary steps to debug a Pathway server

Lab Exercise (2 hours):

• Gain experience in enabling a database to be protected by the TM/MP facility
• Demonstrate the difference between audited and nonaudited databases

Lab Exercise (2 hours):

• Code overlay screens

server fundamentals · Basic function of a server

• Function of $RECEIVE in interprocess communication
• Steps that make up the basic structure of a server program
• Coding the COBOL85 server program to use $RECEIVE properly
• How server programs can utilize the enhanced capabilities of the D.xx versions of the NonStop Kernel operating system
• Why servers should be context-free
• Problems that can occur when servers have concurrent access to a database

Lab Exercise (1 hour):

• Code a Pathway server to use $RECEIVE

Lab Exercise (1 hour):

• Establish an Inspect session in a Pathway application environment
• Use Inspect to examine the message passed between a requester and server in the Pathway application environment server programs—Enscribe database access
• Coding SELECT statements to associate logical file names to physical file names
• Coding statements to open the database files in the correct mode for server access
• Using the NonStop server extension to solve positioning problems
• Coding file access statements to read, update, and delete database records
• Locking implications when accessing Enscribe files
• Establishing a Declaratives Section in a server to handle I/O errors
• Compiling a server program that accesses Enscribe files server programs—NonStop SQL/MP database access
• Identifying and defining a host variable
• Coding an SQL/MP SELECT statement that accesses a single row of a NonStop SQL table
• Writing a variety of Data Manipulation Language (DML) statements to insert, update, and delete records in an SQL/MP database
• Operation of a cursor
• Constructing a series of statements that use a cursor
• Writing statements to report SQL/MP run-time errors
• Process used to compile a COBOL85 program with embedded SQL/MP statements
• Writing statements to compile a COBOL85 server program that accesses a NonStop SQL/MP database

Lab Exercise (1.5 hours):

• Code simple server programs to access an Enscribe or SQL/MP database
• Code a variety of statements and then compile and test your server program

Lab Exercise (2 hours):

• Code slightly more advanced statements to access an Enscribe or NonStop SQL/MP database to include the insertion of new information based on screen input

Lab Exercise (5 hours)—Optional:

• Put into practice some of the advanced concepts learned about SCREEN COBOL

Lab Exercise (3 hours)—Optional:

• Gain a complete picture of a Pathway requester server pair
• Design and build copy libraries, the DDL source, and a simple database