elasticsearch/readme.hints.md

Project Readme Hints

v3.0 Transformation Progress

Completed Components

Phase 1: Foundation (100%) - Complete

• Error handling with typed hierarchy
• Observability (logging, metrics, tracing)
• Configuration management with fluent builder
• Connection management with health checks and circuit breaker

Phase 2: Domain APIs (100%) - Complete! 🎉

• Document API (100%) - Complete fluent CRUD operations with sessions, iteration, snapshots
• Query Builder (100%) - Type-safe query construction with aggregations
• Logging API (100%) - Enterprise structured logging with:
  • Batched bulk indexing with auto-flush
  • Log enrichment pipeline (host, environment, service, sanitization)
  • Sampling strategies (all, errors-only, percentage, rate-limit)
  • ILM (Index Lifecycle Management) integration
  • Metric extraction from logs
  • Dynamic tagging based on content
  • Queue overflow protection
  • Example at ts/examples/logging/logging-example.ts
• Bulk Indexer (100%) - High-throughput document ingestion with:
  • Fixed, adaptive, and size-based batching strategies
  • Parallel workers for concurrent processing
  • Backpressure handling with queue management
  • Dead-letter queue for failed operations
  • Progress callbacks with ETA estimation
  • Automatic retries with exponential backoff
  • Mixed operations (index, update, delete)
  • Comprehensive statistics tracking
  • Example at ts/examples/bulk/bulk-indexer-example.ts
• KV Store (100%) - Distributed key-value storage with:
  • Time-to-live (TTL) support with automatic expiration
  • In-memory caching layer with multiple eviction policies (LRU, LFU, FIFO, TTL)
  • Batch operations (mget, mset, mdelete)
  • Scan/cursor support for large keyspaces with wildcard patterns
  • Automatic compression for large values
  • Optimistic concurrency control
  • Cache hit/miss statistics
  • Example at ts/examples/kv/kv-store-example.ts

Phase 3: Advanced Features

• Plugin Architecture (100%) - Extensible request/response middleware:
  • Plugin lifecycle hooks (beforeRequest, afterResponse, onError)
  • Plugin priority and execution ordering
  • Plugin statistics and monitoring
  • Built-in plugins:
    • Logging plugin - automatic request/response logging
    • Metrics plugin - automatic metrics collection
    • Cache plugin - response caching for GET requests
    • Retry plugin - automatic retry with exponential backoff
    • Rate limit plugin - token bucket rate limiting
  • Custom plugin creation with factories
  • Dynamic plugin registration/unregistration
  • Shared context between plugins
  • Timeout protection for plugin hooks
  • Example at ts/examples/plugins/plugin-example.ts

Query Builder Usage

import { createQuery } from './ts';

// Simple query
const results = await createQuery<Product>('products')
  .match('name', 'laptop')
  .range('price', { gte: 100, lte: 1000 })
  .sort('price', 'asc')
  .execute();

// With aggregations
const stats = await createQuery<Product>('products')
  .matchAll()
  .aggregations((agg) => {
    agg.terms('brands', 'brand.keyword')
      .subAggregation('avg_price', (sub) => sub.avg('avg_price', 'price'));
  })
  .execute();

Next Priorities

1. Transaction Support (Phase 3) - Distributed transactions across multiple documents
2. Schema Management (Phase 3) - Index mapping management and migrations
3. Comprehensive Test Suite (Phase 4) - Full test coverage
4. Migration Guide (Phase 4) - Guide from v2 to v3

Structure

• Single ts/ directory (no parallel structures)
• Single tsconfig.json with strict mode enabled
• All v3.0 code lives in ts/ directory

Known Issues

• Minor TypeScript strict mode import issues documented in ts/QUICK_FIXES.md
• Need to apply import type fixes for verbatimModuleSyntax compliance