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 (100%) - Complete!

• 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
• Transaction Support (100%) - ACID-like distributed transactions:
  • Optimistic concurrency control (seq_no/primary_term)
  • Automatic rollback with compensation operations
  • Savepoints for partial rollback
  • Conflict detection and configurable resolution (retry, abort, skip, force)
  • Multi-document atomic operations
  • Isolation levels (read_uncommitted, read_committed, repeatable_read)
  • Transaction callbacks (onBegin, onCommit, onRollback, onConflict)
  • Transaction statistics and monitoring
  • Timeout with automatic cleanup
  • Example at ts/examples/transactions/transaction-example.ts
• Schema Management (100%) - Index mapping management and migrations:
  • Index creation with mappings, settings, and aliases
  • Schema validation before apply
  • Versioned migrations with history tracking
  • Schema diff and comparison (added/removed/modified fields)
  • Breaking change detection
  • Index templates (composable and legacy)
  • Component templates
  • Alias management with filters
  • Dynamic settings updates
  • Migration rollback support
  • Dry run mode for testing
  • Example at ts/examples/schema/schema-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 (Phase 4)

1. Comprehensive Test Suite - Full test coverage for all modules
2. Migration Guide - Guide from v2 to v3 API
3. README Update - Update main README with new v3 API documentation

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