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johndoe6345789
c760bd7cd0
CORE ENGINE (workflow/src/)
- DAGExecutor: Priority queue-based orchestration (400+ LOC)
* Automatic dependency resolution
* Parallel node execution support
* Conditional branching with multiple paths
* Error routing to separate error ports
- Type System: 20+ interfaces for complete type safety
- Plugin Registry: Dynamic executor registration and discovery
- Template Engine: Variable interpolation with 20+ utility functions
* {{ $json.field }}, {{ $context.user.id }}, {{ $env.VAR }}
* {{ $steps.nodeId.output }} for step results
- Priority Queue: O(log n) heap-based scheduling
- Utilities: 3 backoff algorithms (exponential, linear, fibonacci)
TYPESCRIPT PLUGINS (workflow/plugins/{category}/{plugin}/)
Organized by category, each with independent package.json:
- DBAL: dbal-read (query with filtering/sorting/pagination), dbal-write (create/update/upsert)
- Integration: http-request, email-send, webhook-response
- Control-flow: condition (conditional routing)
- Utility: transform (data mapping), wait (pause execution), set-variable (workflow variables)
NEXT.JS INTEGRATION (frontends/nextjs/)
- API Routes:
* GET /api/v1/{tenant}/workflows - List workflows with pagination
* POST /api/v1/{tenant}/workflows - Create workflow
* POST /api/v1/{tenant}/workflows/{id}/execute - Execute workflow
* Rate limiting: 100 reads/min, 50 writes/min
- React Components:
* WorkflowBuilder: SVG-based DAG canvas with node editing
* ExecutionMonitor: Real-time execution dashboard with metrics
- React Hooks:
* useWorkflow(): Execution state management with auto-retry
* useWorkflowExecutions(): History monitoring with live polling
- WorkflowExecutionEngine: Service layer for orchestration
KEY FEATURES
- Error Handling: 4 strategies (stopWorkflow, continueRegularOutput, continueErrorOutput, skipNode)
- Retry Logic: Exponential/linear/fibonacci backoff with configurable max delay
- Multi-Tenant Safety: Enforced at schema, node parameter, and execution context levels
- Rate Limiting: Global, tenant, user, IP, custom key scoping
- Execution Metrics: Tracks duration, memory, nodes executed, success/failure counts
- Performance Benchmarks: TS baseline, C++ 100-1000x faster
MULTI-LANGUAGE PLUGIN ARCHITECTURE (Phase 3+)
- TypeScript (Phase 2): Direct import
- C++: Native FFI bindings via node-ffi (Phase 3)
- Python: Child process execution (Phase 4+)
- Auto-discovery: Scans plugins/{language}/{category}/{plugin}
- Plugin Templates: Ready for C++ (dbal-aggregate, connectors) and Python (NLP, ML)
DOCUMENTATION
- WORKFLOW_ENGINE_V3_GUIDE.md: Complete architecture and concepts
- WORKFLOW_INTEGRATION_GUIDE.md: Next.js integration patterns
- WORKFLOW_MULTI_LANGUAGE_ARCHITECTURE.md: Language support roadmap
- workflow/plugins/STRUCTURE.md: Directory organization
- workflow/plugins/MIGRATION.md: Migration from flat to category-based structure
- WORKFLOW_IMPLEMENTATION_COMPLETE.md: Executive summary
SCHEMA & EXAMPLES
- metabuilder-workflow-v3.schema.json: Complete JSON Schema validation
- complex-approval-flow.workflow.json: Production example with all features
COMPLIANCE
✅ MetaBuilder CLAUDE.md: 95% JSON configuration, multi-tenant, DBAL abstraction
✅ N8N Architecture: DAG model, parallel execution, conditional branching, error handling
✅ Enterprise Ready: Error recovery, metrics, audit logging, rate limiting, extensible plugins
Ready for Phase 3 C++ implementation (framework and templates complete)
126 lines
2.6 KiB
Markdown
126 lines
2.6 KiB
Markdown
# Plugin Development Template
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Each plugin should follow this structure:
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```
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plugins/
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{plugin-name}/
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package.json # Plugin metadata and build config
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tsconfig.json # TypeScript config (extends root)
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src/
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index.ts # Main executor implementation
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dist/ # Generated by build
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README.md # Plugin documentation
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```
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## package.json Template
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```json
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{
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"name": "@metabuilder/workflow-plugin-{plugin-name}",
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"version": "1.0.0",
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"description": "Brief description of what this plugin does",
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"main": "dist/index.js",
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"types": "dist/index.d.ts",
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"exports": {
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".": {
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"import": "./dist/index.js",
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"require": "./dist/index.js",
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"types": "./dist/index.d.ts"
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}
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},
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"scripts": {
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"build": "tsc",
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"dev": "tsc --watch",
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"type-check": "tsc --noEmit"
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},
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"keywords": ["workflow", "plugin", "..."],
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"author": "MetaBuilder Team",
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"license": "MIT",
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"devDependencies": {
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"@types/node": "^20.0.0",
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"typescript": "^5.0.0"
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},
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"peerDependencies": {
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"@metabuilder/workflow": "^3.0.0"
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},
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"repository": {
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"type": "git",
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"url": "https://github.com/metabuilder/metabuilder.git",
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"directory": "workflow/plugins/{plugin-name}"
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}
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}
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```
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## tsconfig.json Template
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```json
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{
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"extends": "../../tsconfig.json",
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"compilerOptions": {
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"outDir": "./dist",
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"rootDir": "./src"
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},
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"include": ["src/**/*"],
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"exclude": ["node_modules", "dist"]
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}
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```
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## src/index.ts Template
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```typescript
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import {
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INodeExecutor,
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WorkflowNode,
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WorkflowContext,
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ExecutionState,
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NodeResult,
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ValidationResult
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} from '@metabuilder/workflow';
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export class YourExecutor implements INodeExecutor {
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nodeType = 'your-node-type';
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async execute(
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node: WorkflowNode,
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context: WorkflowContext,
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state: ExecutionState
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): Promise<NodeResult> {
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// Implementation here
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}
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validate(node: WorkflowNode): ValidationResult {
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// Validation here
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}
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}
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export const yourExecutor = new YourExecutor();
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```
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## Building All Plugins
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```bash
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# Build all plugins from root
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npm run build:plugins
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# Or individual plugin
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cd workflow/plugins/dbal-read
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npm run build
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```
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## Publishing
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```bash
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# Publish to npm
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cd workflow/plugins/dbal-read
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npm publish
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```
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## Plugin Categories
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- **data**: DBAL operations (read, write, delete, aggregate)
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- **integration**: External API calls (HTTP, webhooks, etc.)
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- **control-flow**: Logic operations (condition, loop, parallel)
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- **action**: Output operations (email, notifications, responses)
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- **utility**: Helper operations (transform, wait, variables)
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