Fujitsu Mainframe Analyzer
Analyze and migrate Fujitsu mainframe systems (FACOM, BS2000/OSD, OSIV, NetCOBOL, PowerCOBOL, Fujitsu JCL, SYMFOWARE) to modern Java/cloud platforms.
Core Capabilities
1. Fujitsu COBOL Analysis
Extract NetCOBOL/PowerCOBOL programs, Fujitsu-specific verbs, proprietary file organizations (SAM/PAM/ISAM), SYMFOWARE embedded SQL, screen handling (ACCEPT/DISPLAY with CRT STATUS).
2. Fujitsu JCL Analysis
Parse JOB statements, STEP definitions, ASSIGN/FILEDEF statements, conditional execution, cataloged procedures, resource allocation.
3. BS2000/OSD System Analysis
Analyze ENTER statements, system commands, file handling (PAM, SAM, ISAM), job variables, SDF processing.
4. SYMFOWARE Database Migration
Extract embedded SQL, schemas, stored procedures, transactions. Migrate to PostgreSQL, Oracle, or SQL Server.
5. Migration to Modern Platforms
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 filesStep 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
| Type | Description | Java Equivalent |
|---|---|---|
| SAM | Sequential | BufferedReader/Writer |
| PAM | Partitioned | File directory |
| ISAM | Indexed | Database with index |
| GDG | Versioned | Timestamp naming |
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-IDJava 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 && ./processLoad references/migration-patterns.md for Kubernetes CronJob examples.
Data Type Mappings
Load references/data-mappings.md for comprehensive tables. Critical mappings:
| Fujitsu COBOL | Java | Notes |
|---|---|---|
PIC 9(n) | int, long, BigInteger | Size dependent |
PIC S9(n)V9(m) | BigDecimal | ALWAYS for decimals |
PIC X(n) | String | Alphanumeric |
COMP-3 | BigDecimal | NEVER float/double |
OCCURS n | List<T> | Prefer List over array |
| SYMFOWARE | PostgreSQL |
|---|---|
CHAR(n) | CHAR(n) |
VARCHAR(n) | VARCHAR(n) |
DECIMAL(p,s) | NUMERIC(p,s) |
TIMESTAMP | TIMESTAMP WITH TIME ZONE |
BLOB | BYTEA |
CLOB | TEXT |
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
- Executive Summary - Overview, business impact, recommendation
- Current State - Inventory, architecture, technology, dependencies
- Fujitsu Features - NetCOBOL/PowerCOBOL, SYMFOWARE, file systems, screens, JCL
- Target Design - Architecture, tech stack, microservices, data model, APIs
- Migration Plan - Approach, timeline, resources, risks, costs
- Technical Appendix - Code samples, mappings, utilities, testing
Load references/migration-strategy.md for complete frameworks and templates.
Critical Best Practices
- ALWAYS use BigDecimal for COMP-3 and decimals (NEVER float/double)
- Preserve business logic - understand before changing
- Test with production data - validate conversions
- Document Fujitsu extensions - proprietary features need special handling
- Plan parallel run - compare outputs before cutover
- Automate testing - regression suite for validation
- Monitor everything - logging, metrics, alerts
- 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 patternsreferences/data-mappings.md- Comprehensive type mappings, REDEFINES, dates, best practicesreferences/migration-strategy.md- Full framework: assessment, design, testing, cutover, costs
Load these files for in-depth guidance on specific topics.