Fujitsu Mainframe Analyzer

Generate Spring Boot microservices, REST APIs, cloud-native apps (AWS, Azure, GCP), containerized deployments (Docker, Kubernetes), CI/CD pipelines.

Workflow

Step 1: Discover Assets

find . -name "*.cbl" -o -name "*.CBL" -o -name "*.cob"  # COBOL
find . -name "*.ncb" -o -name "*.NCB"  # NetCOBOL
find . -name "*.fjcl" -o -name "*.jcl"  # JCL
find . -name "*.cpy" -o -name "*.CPY"  # Copybooks
find . -name "*.sdf" -o -name "*.SDF"  # SDF files

Step 2: Analyze Structure

Extract divisions, data structures, file definitions, screen definitions, embedded SQL, Fujitsu-specific extensions. Key features:

• File organization: SEQUENTIAL, RELATIVE, INDEXED
• Screen handling: CRT STATUS, screen control
• Database: SYMFOWARE SQL
• Fujitsu verbs: ACCEPT OMITTED, INSPECT extensions
• Error handling: FILE STATUS, DECLARATIVES

Step 3: Map Dependencies

Build graphs: CALL hierarchies, copybook usage, file dependencies (FACOM), database access (SYMFOWARE), JCL sequences, screen definitions.

Step 4: Create Migration Strategy

Document architecture, Fujitsu-specific features, Java/cloud design, data migration, roadmap. Load references/migration-strategy.md for detailed framework.

Fujitsu-Specific Features

NetCOBOL Extensions

• Windowing, GUI support (PowerCOBOL)
• Enhanced ACCEPT/DISPLAY with positioning
• Object-oriented: CLASS definitions
• Extended exception handling

SYMFOWARE Database

• Embedded SQL: SELECT, INSERT, UPDATE, DELETE
• Cursors: DECLARE, OPEN, FETCH, CLOSE
• Transactions: COMMIT, ROLLBACK
• Migration: SYMFOWARE → PostgreSQL (cost), Oracle (enterprise), SQL Server

File Systems

Quick Patterns

COBOL → Java Spring Boot

Load references/migration-patterns.md for detailed examples. Quick overview:

Fujitsu COBOL:

SELECT EMPFILE ASSIGN TO "EMPDATA"
    ORGANIZATION IS INDEXED
    ACCESS MODE IS RANDOM
    RECORD KEY IS EMP-ID

Java JPA:

@Entity
@Table(name = "employees")
public class Employee {
    @Id
    private Integer empId;
    private String empName;
    private BigDecimal empSalary;
}

JCL → Shell + Kubernetes

Fujitsu JCL:

//STEP010  EXEC PGM=VALIDATE
//STEP020  EXEC PGM=PROCESS,COND=(0,EQ,STEP010)

Shell:

./validate && ./process

Load references/migration-patterns.md for Kubernetes CronJob examples.

Data Type Mappings

Load references/data-mappings.md for comprehensive tables. Critical mappings:

Migration Strategies

Strangler Fig Pattern (Recommended)

Gradually replace functionality. Lower risk, learn and adjust. Load references/migration-strategy.md for detailed steps.

Big Bang

Complete rewrite, single cutover. Higher risk, clean architecture. For smaller systems.

Hybrid

Core services modernized first, periphery later. Balanced risk/reward.

Output Requirements

Analysis Report Structure

1. Executive Summary - Overview, business impact, recommendation
2. Current State - Inventory, architecture, technology, dependencies
3. Fujitsu Features - NetCOBOL/PowerCOBOL, SYMFOWARE, file systems, screens, JCL
4. Target Design - Architecture, tech stack, microservices, data model, APIs
5. Migration Plan - Approach, timeline, resources, risks, costs
6. Technical Appendix - Code samples, mappings, utilities, testing

Load references/migration-strategy.md for complete frameworks and templates.

Critical Best Practices

1. ALWAYS use BigDecimal for COMP-3 and decimals (NEVER float/double)
2. Preserve business logic - understand before changing
3. Test with production data - validate conversions
4. Document Fujitsu extensions - proprietary features need special handling
5. Plan parallel run - compare outputs before cutover
6. Automate testing - regression suite for validation
7. Monitor everything - logging, metrics, alerts
8. Security first - authentication, authorization, encryption

Common Challenges & Solutions

Fujitsu-Specific Features → Custom adapters, equivalent libraries, re-implementation Screen Handling → User requirements gathering, modern UX design File Processing → ETL tools, Spring Batch Performance → Caching (Redis), async processing, DB optimization Transactions → Spring @Transactional, Saga pattern

Reference Files

When detailed information needed:

• references/migration-patterns.md - Complete code examples for all migration patterns
• references/data-mappings.md - Comprehensive type mappings, REDEFINES, dates, best practices
• references/migration-strategy.md - Full framework: assessment, design, testing, cutover, costs

Load these files for in-depth guidance on specific topics.