dad_child3.mdā¢7 kB
## Business Summary Document
---
### 1. TECHNICAL FUNCTIONALITY ASSESSMENT
#### **Parent Module (LGACDB02)**
- **Core Operations:**
- **CICS Commands:**
- `EXEC CICS ABEND` used for task termination in error scenarios.
- `EXEC CICS RETURN` for returning control to the system.
- `EXEC CICS ASKTIME` and `EXEC CICS FORMATTIME` used for time operations.
- `EXEC CICS LINK` for program communication (to the child module LGSTSQ).
- **SQL Operations:**
- The program includes an `INSERT` SQL statement for updating a "user security" table, implying database interaction for storing user passwords.
- **Error Handling:**
- Error messages are generated and passed to the child module.
- **Commarea Handling:**
- DFHCOMMAREA used for data transfer between programs.
- **Transaction Data:** Uses variables like `EIBTRNID` and `EIBTASKN` for transaction context.
#### **Child Module (LGSTSQ)**
- **Core Operations:**
- **CICS Commands:**
- `EXEC CICS ASSIGN` used for system context information retrieval (e.g., SYSTEM ID, invoking program).
- `EXEC CICS RECEIVE` for transaction data from the terminal.
- `EXEC CICS WRITEQ TD` and `WRITEQ TS` to write to transient data and temporary storage queues.
- `EXEC CICS SEND TEXT` to display terminal messages.
- `EXEC CICS RETURN` to return control to the system.
- **Queue Handling:**
- Uses transient and temporary storage queues for message processing and persistence.
- **Error Messages:** Writes error messages to queues and interacts with terminal-based messaging systems.
#### **Specific Technologies Used:**
- **CICS Commands:** ABEND, ASKTIME, FORMATTIME, LINK, WRITEQ, SEND TEXT.
- **SQL Database Operations:** INSERT operation.
- **Data Stores:** DFHCOMMAREA, temporary storage queues, transient queues.
---
### 2. EXECUTIVE SUMMARY
#### **Business Purpose:**
This system orchestrates secure user data management and error logging within transactional contexts, facilitating smooth communication with dependent modules.
#### **Key Functionality Overview:**
The parent module (LGACDB02) handles transactional workflow operations, including user security data insertion and error handling, while calling the child module (LGSTSQ) to log messages to queues and provide context-based terminal communication.
#### **Business Value:**
- Ensures secure user data handling.
- Centralized logging and error tracking for operational reliability.
- Transaction context validation and error prevention.
- Seamless communication between modules for efficient process flows.
- Enhanced operational consistency with clear workflow segmentation.
- Reduces manual error management overhead.
#### **Stakeholders and Roles:**
- **Service Representatives:** Monitor error messages and handle user-related updates.
- **IT Operations Team:** Manage and support transaction systems.
- **Database Administrators:** Oversee secure storage and retrieval of user data.
- **Business Managers:** Utilize system data for decision-making and report generation.
---
### 3. FUNCTIONAL AREAS
#### **Primary Business Functions:**
1. **User Data Security Insert:** Insert user password data securely into the database.
2. **Transaction Context Update:** Manage transaction metadata like terminal ID and transaction number.
3. **Error Handling and Logging:** Generate error logs and communicate errors via queues.
4. **Program Integration:** Facilitate communication between parent and child modules via CICS LINK.
5. **Terminal Messaging:** Notify users of error states and transaction updates via terminal.
#### **Critical Business Processes:**
1. Ensure user data is securely stored using SQL `INSERT` statements.
2. Process transactional data and manage workflow using DFHCOMMAREA.
3. Log operational errors into message queues for monitoring and recovery.
4. Display error and operational messages to users on terminals.
5. Provide real-time integration between dependent modules for workflow completion.
---
### 4. BUSINESS PROCESS VISUALIZATION
```mermaid
flowchart TD
A[Start User Security Data Process] --> B{Transaction Data Received?}
B -- No --> F[Log Error: "No COMMAREA Received"]
B -- Yes --> C{Transaction Request ID='02ACUS'?}
F --> G[End Process]
C -- No --> D[Return with Code '99']
C -- Yes --> E[Insert User Security Data]
E --> H{SQL Operation Successful?}
H -- No --> I[Log SQL Error and Return]
H -- Yes --> J[End Process]
D --> G
I --> G
J --> G
```
---
### 5. CODE EVIDENCE
#### **Parent Module (LGACDB02):**
1. **User Data Security Insert:**
- Location: `MAINLINE`, lines 145-148.
- Description: SQL `INSERT` operations secure user password data.
- Confidence: **High**.
2. **Error Handling and Logging:**
- Location: `WRITE-ERROR-MESSAGE`, lines 192-225.
- Description: Logs errors via CICS LINK and uses COMMAREA data for error details.
- Confidence: **High**.
3. **Program Integration:**
- Location: `WRITE-ERROR-MESSAGE`, line 205.
- Description: Links to child module LGSTSQ for logging error messages.
- Confidence: **High**.
#### **Child Module (LGSTSQ):**
1. **Queue Handling & Logging:**
- Location: `MAINLINE`, lines 94, 105.
- Description: Writes messages to transient data queues.
- Confidence: **High**.
2. **Terminal Messaging:**
- Location: `MAINLINE`, line 114.
- Description: Sends error instructions to terminal.
- Confidence: **Medium**.
---
### 6. TECHNICAL IMPLEMENTATION
#### **File Operations:**
- **Temporary Storage Queues:** Used for message persistence and processing.
- **Transient Data Queues:** Operates message logging and handling.
#### **Database Interactions:**
- **Customer Security Table:** Insert user information using SQL.
#### **Program Communication:**
- Parent module calls child module LGSTSQ for error logging via `EXEC CICS LINK`.
- Data is transferred via DFHCOMMAREA for error handling and logging.
#### **User Interface:**
- Terminal messaging via `EXEC CICS SEND TEXT` displays operational updates and errors.
---
### 7. DEPENDENCIES AND INTEGRATIONS
#### **External Systems:**
- Database managing user security credentials.
#### **Internal Dependencies:**
- Parent module (LGACDB02) is dependent on the child module (LGSTSQ) for error logging.
#### **Data Dependencies:**
- SQL database (user security credentials).
- CICS queues (message logging).
- DFHCOMMAREA (data transfer between modules).
---
### 8. MISSING INFORMATION
#### **Gaps:**
- Full database schema related to user security insert operations.
- Details on transient and temporary storage queue structure.
#### **Assumptions:**
- LGACDB02 inserts only user security data based on named variables.
- LGSTSQ primarily handles error messages and system-level communication.
#### **Suggested Sources:**
- Database documentation for detailed schema and table descriptions.
- System operations manuals for CICS queue implementation details.. END