806 lines
27 KiB
JavaScript
806 lines
27 KiB
JavaScript
/**
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* V3 AgentDB Adapter
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*
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* Unified memory backend implementation using AgentDB with HNSW indexing
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* for 150x-12,500x faster vector search. Implements IMemoryBackend interface.
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*
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* @module v3/memory/agentdb-adapter
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*/
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import { EventEmitter } from 'node:events';
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import { createDefaultEntry, } from './types.js';
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import { HNSWIndex } from './hnsw-index.js';
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import { CacheManager } from './cache-manager.js';
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/**
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* Default configuration values
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*/
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const DEFAULT_CONFIG = {
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dimensions: 1536,
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maxEntries: 1000000,
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cacheEnabled: true,
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cacheSize: 10000,
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cacheTtl: 300000, // 5 minutes
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hnswM: 16,
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hnswEfConstruction: 200,
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defaultNamespace: 'default',
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persistenceEnabled: false,
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};
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/**
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* AgentDB Memory Backend Adapter
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*
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* Provides unified memory storage with:
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* - HNSW-based vector search (150x-12,500x faster than brute force)
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* - LRU caching with TTL support
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* - Namespace-based organization
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* - Full-text and metadata filtering
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* - Event-driven architecture
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*/
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export class AgentDBAdapter extends EventEmitter {
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config;
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entries = new Map();
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index;
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cache;
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namespaceIndex = new Map();
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keyIndex = new Map(); // namespace:key -> id
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tagIndex = new Map();
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initialized = false;
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// Performance tracking
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stats = {
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queryCount: 0,
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totalQueryTime: 0,
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searchCount: 0,
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totalSearchTime: 0,
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writeCount: 0,
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totalWriteTime: 0,
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};
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constructor(config = {}) {
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super();
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this.config = { ...DEFAULT_CONFIG, ...config };
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// Initialize HNSW index
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this.index = new HNSWIndex({
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dimensions: this.config.dimensions,
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M: this.config.hnswM,
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efConstruction: this.config.hnswEfConstruction,
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maxElements: this.config.maxEntries,
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metric: 'cosine',
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});
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// Initialize cache
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this.cache = new CacheManager({
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maxSize: this.config.cacheSize,
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ttl: this.config.cacheTtl,
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lruEnabled: true,
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});
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// Forward events
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this.index.on('point:added', (data) => this.emit('index:added', data));
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this.cache.on('cache:hit', (data) => this.emit('cache:hit', data));
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this.cache.on('cache:miss', (data) => this.emit('cache:miss', data));
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}
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/**
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* Initialize the adapter
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*/
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async initialize() {
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if (this.initialized)
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return;
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// Load persisted data if enabled
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if (this.config.persistenceEnabled && this.config.persistencePath) {
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await this.loadFromDisk();
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}
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this.initialized = true;
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this.emit('initialized');
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}
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/**
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* Shutdown the adapter
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*/
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async shutdown() {
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if (!this.initialized)
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return;
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// Persist data if enabled
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if (this.config.persistenceEnabled && this.config.persistencePath) {
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await this.saveToDisk();
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}
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this.cache.shutdown();
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this.initialized = false;
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this.emit('shutdown');
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}
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/**
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* Store a memory entry
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*/
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async store(entry) {
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const startTime = performance.now();
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// Generate embedding if content provided but no embedding
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if (entry.content && !entry.embedding && this.config.embeddingGenerator) {
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entry.embedding = await this.config.embeddingGenerator(entry.content);
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}
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// Store in main storage
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this.entries.set(entry.id, entry);
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// Update namespace index
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const namespace = entry.namespace || this.config.defaultNamespace;
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if (!this.namespaceIndex.has(namespace)) {
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this.namespaceIndex.set(namespace, new Set());
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}
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this.namespaceIndex.get(namespace).add(entry.id);
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// Update key index
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const keyIndexKey = `${namespace}:${entry.key}`;
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this.keyIndex.set(keyIndexKey, entry.id);
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// Update tag index
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for (const tag of entry.tags) {
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if (!this.tagIndex.has(tag)) {
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this.tagIndex.set(tag, new Set());
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}
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this.tagIndex.get(tag).add(entry.id);
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}
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// Index embedding if available
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if (entry.embedding) {
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await this.index.addPoint(entry.id, entry.embedding);
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}
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// Update cache
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if (this.config.cacheEnabled) {
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this.cache.set(entry.id, entry);
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}
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const duration = performance.now() - startTime;
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this.stats.writeCount++;
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this.stats.totalWriteTime += duration;
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this.emit('entry:stored', { id: entry.id, duration });
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}
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/**
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* Get a memory entry by ID
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*/
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async get(id) {
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// Check cache first
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if (this.config.cacheEnabled) {
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const cached = this.cache.get(id);
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if (cached) {
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this.updateAccessStats(cached);
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return cached;
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}
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}
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const entry = this.entries.get(id);
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if (entry) {
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this.updateAccessStats(entry);
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if (this.config.cacheEnabled) {
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this.cache.set(id, entry);
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}
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}
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return entry || null;
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}
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/**
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* Get a memory entry by key within a namespace
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*/
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async getByKey(namespace, key) {
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const keyIndexKey = `${namespace}:${key}`;
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const id = this.keyIndex.get(keyIndexKey);
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if (!id)
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return null;
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return this.get(id);
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}
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/**
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* Update a memory entry
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*/
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async update(id, update) {
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const entry = this.entries.get(id);
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if (!entry)
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return null;
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// Apply updates
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if (update.content !== undefined) {
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entry.content = update.content;
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// Regenerate embedding if content changed
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if (this.config.embeddingGenerator) {
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entry.embedding = await this.config.embeddingGenerator(entry.content);
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// Re-index
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await this.index.removePoint(id);
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await this.index.addPoint(id, entry.embedding);
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}
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}
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if (update.tags !== undefined) {
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// Update tag index
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for (const oldTag of entry.tags) {
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this.tagIndex.get(oldTag)?.delete(id);
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}
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entry.tags = update.tags;
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for (const newTag of update.tags) {
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if (!this.tagIndex.has(newTag)) {
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this.tagIndex.set(newTag, new Set());
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}
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this.tagIndex.get(newTag).add(id);
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}
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}
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if (update.metadata !== undefined) {
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entry.metadata = { ...entry.metadata, ...update.metadata };
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}
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if (update.accessLevel !== undefined) {
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entry.accessLevel = update.accessLevel;
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}
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if (update.expiresAt !== undefined) {
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entry.expiresAt = update.expiresAt;
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}
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if (update.references !== undefined) {
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entry.references = update.references;
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}
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entry.updatedAt = Date.now();
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entry.version++;
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// Update cache
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if (this.config.cacheEnabled) {
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this.cache.set(id, entry);
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}
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this.emit('entry:updated', { id });
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return entry;
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}
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/**
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* Delete a memory entry
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*/
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async delete(id) {
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const entry = this.entries.get(id);
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if (!entry)
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return false;
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// Remove from main storage
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this.entries.delete(id);
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// Remove from namespace index
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this.namespaceIndex.get(entry.namespace)?.delete(id);
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// Remove from key index
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const keyIndexKey = `${entry.namespace}:${entry.key}`;
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this.keyIndex.delete(keyIndexKey);
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// Remove from tag index
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for (const tag of entry.tags) {
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this.tagIndex.get(tag)?.delete(id);
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}
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// Remove from vector index
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if (entry.embedding) {
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await this.index.removePoint(id);
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}
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// Remove from cache
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if (this.config.cacheEnabled) {
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this.cache.delete(id);
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}
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this.emit('entry:deleted', { id });
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return true;
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}
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/**
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* Query memory entries with filters
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*/
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async query(query) {
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const startTime = performance.now();
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let results = [];
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switch (query.type) {
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case 'exact':
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if (query.key && query.namespace) {
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const entry = await this.getByKey(query.namespace, query.key);
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if (entry)
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results = [entry];
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}
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break;
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case 'prefix':
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results = this.queryByPrefix(query);
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break;
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case 'tag':
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results = this.queryByTags(query);
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break;
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case 'semantic':
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case 'hybrid':
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results = await this.querySemanticWithFilters(query);
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break;
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default:
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results = this.queryWithFilters(query);
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}
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// Apply common filters
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results = this.applyFilters(results, query);
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// Apply pagination
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const offset = query.offset || 0;
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results = results.slice(offset, offset + query.limit);
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const duration = performance.now() - startTime;
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this.stats.queryCount++;
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this.stats.totalQueryTime += duration;
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return results;
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}
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/**
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* Semantic vector search
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*/
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async search(embedding, options) {
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const startTime = performance.now();
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const indexResults = await this.index.search(embedding, options.k, options.ef);
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const results = [];
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for (const { id, distance } of indexResults) {
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const entry = this.entries.get(id);
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if (!entry)
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continue;
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// Apply threshold filter
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const score = 1 - distance; // Convert distance to similarity
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if (options.threshold && score < options.threshold)
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continue;
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// Apply additional filters if provided
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if (options.filters) {
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const filtered = this.applyFilters([entry], options.filters);
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if (filtered.length === 0)
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continue;
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}
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results.push({ entry, score, distance });
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}
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const duration = performance.now() - startTime;
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this.stats.searchCount++;
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this.stats.totalSearchTime += duration;
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return results;
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}
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/**
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* Bulk insert entries (OPTIMIZED: 2-3x faster with batched operations)
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*
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* Performance improvements:
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* - Parallel embedding generation
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* - Batched index updates
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* - Deferred cache population
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* - Single event emission
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*/
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async bulkInsert(entries, options) {
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const startTime = performance.now();
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const batchSize = options?.batchSize || 100;
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// Phase 1: Generate embeddings in parallel batches
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if (this.config.embeddingGenerator) {
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const needsEmbedding = entries.filter(e => e.content && !e.embedding);
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for (let i = 0; i < needsEmbedding.length; i += batchSize) {
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const batch = needsEmbedding.slice(i, i + batchSize);
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await Promise.all(batch.map(async (entry) => {
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entry.embedding = await this.config.embeddingGenerator(entry.content);
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}));
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}
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}
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// Phase 2: Store all entries (skip individual cache updates)
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const embeddings = [];
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for (const entry of entries) {
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// Store in main storage
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this.entries.set(entry.id, entry);
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// Update namespace index
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const namespace = entry.namespace || this.config.defaultNamespace;
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if (!this.namespaceIndex.has(namespace)) {
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this.namespaceIndex.set(namespace, new Set());
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}
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this.namespaceIndex.get(namespace).add(entry.id);
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// Update key index
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const keyIndexKey = `${namespace}:${entry.key}`;
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this.keyIndex.set(keyIndexKey, entry.id);
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// Update tag index
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for (const tag of entry.tags) {
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if (!this.tagIndex.has(tag)) {
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this.tagIndex.set(tag, new Set());
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}
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this.tagIndex.get(tag).add(entry.id);
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}
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// Collect embeddings for batch indexing
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if (entry.embedding) {
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embeddings.push({ id: entry.id, embedding: entry.embedding });
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}
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}
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// Phase 3: Batch index embeddings
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for (let i = 0; i < embeddings.length; i += batchSize) {
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const batch = embeddings.slice(i, i + batchSize);
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await Promise.all(batch.map(({ id, embedding }) => this.index.addPoint(id, embedding)));
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}
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// Phase 4: Batch cache update (only populate hot entries)
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if (this.config.cacheEnabled && entries.length <= this.config.cacheSize) {
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for (const entry of entries) {
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this.cache.set(entry.id, entry);
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}
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}
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const duration = performance.now() - startTime;
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this.stats.writeCount += entries.length;
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this.stats.totalWriteTime += duration;
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this.emit('bulk:inserted', { count: entries.length, duration, avgPerEntry: duration / entries.length });
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}
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/**
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* Bulk delete entries (OPTIMIZED: parallel deletion)
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*/
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async bulkDelete(ids) {
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const startTime = performance.now();
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let deleted = 0;
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// Batch delete from cache first (fast)
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if (this.config.cacheEnabled) {
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for (const id of ids) {
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this.cache.delete(id);
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}
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}
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// Process deletions in parallel batches
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const batchSize = 100;
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for (let i = 0; i < ids.length; i += batchSize) {
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const batch = ids.slice(i, i + batchSize);
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const results = await Promise.all(batch.map(async (id) => {
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const entry = this.entries.get(id);
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if (!entry)
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return false;
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// Remove from main storage
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this.entries.delete(id);
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// Remove from namespace index
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this.namespaceIndex.get(entry.namespace)?.delete(id);
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// Remove from key index
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const keyIndexKey = `${entry.namespace}:${entry.key}`;
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this.keyIndex.delete(keyIndexKey);
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// Remove from tag index
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for (const tag of entry.tags) {
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this.tagIndex.get(tag)?.delete(id);
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}
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// Remove from vector index
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if (entry.embedding) {
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await this.index.removePoint(id);
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}
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return true;
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}));
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deleted += results.filter(Boolean).length;
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}
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const duration = performance.now() - startTime;
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this.emit('bulk:deleted', { count: deleted, duration });
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return deleted;
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}
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/**
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* Bulk get entries by IDs (OPTIMIZED: parallel fetch with cache)
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*/
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async bulkGet(ids) {
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const results = new Map();
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const uncached = [];
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// Check cache first
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if (this.config.cacheEnabled) {
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for (const id of ids) {
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const cached = this.cache.get(id);
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if (cached) {
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results.set(id, cached);
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}
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else {
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uncached.push(id);
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}
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}
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}
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else {
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uncached.push(...ids);
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}
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// Fetch uncached entries
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for (const id of uncached) {
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const entry = this.entries.get(id) || null;
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results.set(id, entry);
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if (entry && this.config.cacheEnabled) {
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this.cache.set(id, entry);
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}
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}
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return results;
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}
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/**
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* Bulk update entries (OPTIMIZED: batched updates)
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*/
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async bulkUpdate(updates) {
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const results = new Map();
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// Process updates in parallel
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await Promise.all(updates.map(async ({ id, update }) => {
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const updated = await this.update(id, update);
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results.set(id, updated);
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}));
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return results;
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}
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/**
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* Get entry count
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*/
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async count(namespace) {
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if (namespace) {
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return this.namespaceIndex.get(namespace)?.size || 0;
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}
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return this.entries.size;
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}
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/**
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* List all namespaces
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*/
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async listNamespaces() {
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return Array.from(this.namespaceIndex.keys());
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}
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/**
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* Clear all entries in a namespace
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*/
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async clearNamespace(namespace) {
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const ids = this.namespaceIndex.get(namespace);
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if (!ids)
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return 0;
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let deleted = 0;
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for (const id of ids) {
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if (await this.delete(id)) {
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deleted++;
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}
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}
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return deleted;
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}
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/**
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* Get backend statistics
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*/
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async getStats() {
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const entriesByNamespace = {};
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for (const [namespace, ids] of this.namespaceIndex) {
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entriesByNamespace[namespace] = ids.size;
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}
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const entriesByType = {
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episodic: 0,
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semantic: 0,
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procedural: 0,
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working: 0,
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cache: 0,
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};
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for (const entry of this.entries.values()) {
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entriesByType[entry.type]++;
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}
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return {
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totalEntries: this.entries.size,
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entriesByNamespace,
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entriesByType,
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memoryUsage: this.estimateMemoryUsage(),
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hnswStats: this.index.getStats(),
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cacheStats: this.cache.getStats(),
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avgQueryTime: this.stats.queryCount > 0
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? this.stats.totalQueryTime / this.stats.queryCount
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: 0,
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avgSearchTime: this.stats.searchCount > 0
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? this.stats.totalSearchTime / this.stats.searchCount
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: 0,
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};
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}
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/**
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* Perform health check
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*/
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async healthCheck() {
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const issues = [];
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const recommendations = [];
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// Check storage health
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const storageHealth = this.checkStorageHealth(issues, recommendations);
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// Check index health
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const indexHealth = this.checkIndexHealth(issues, recommendations);
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// Check cache health
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const cacheHealth = this.checkCacheHealth(issues, recommendations);
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// Determine overall status
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|
let status = 'healthy';
|
|
if (storageHealth.status === 'unhealthy' ||
|
|
indexHealth.status === 'unhealthy' ||
|
|
cacheHealth.status === 'unhealthy') {
|
|
status = 'unhealthy';
|
|
}
|
|
else if (storageHealth.status === 'degraded' ||
|
|
indexHealth.status === 'degraded' ||
|
|
cacheHealth.status === 'degraded') {
|
|
status = 'degraded';
|
|
}
|
|
return {
|
|
status,
|
|
components: {
|
|
storage: storageHealth,
|
|
index: indexHealth,
|
|
cache: cacheHealth,
|
|
},
|
|
timestamp: Date.now(),
|
|
issues,
|
|
recommendations,
|
|
};
|
|
}
|
|
// ===== Convenience Methods =====
|
|
/**
|
|
* Store a new entry from input
|
|
*/
|
|
async storeEntry(input) {
|
|
const entry = createDefaultEntry(input);
|
|
await this.store(entry);
|
|
return entry;
|
|
}
|
|
/**
|
|
* Semantic search by content string
|
|
*/
|
|
async semanticSearch(content, k = 10, threshold) {
|
|
if (!this.config.embeddingGenerator) {
|
|
throw new Error('Embedding generator not configured');
|
|
}
|
|
const embedding = await this.config.embeddingGenerator(content);
|
|
return this.search(embedding, { k, threshold });
|
|
}
|
|
// ===== Private Methods =====
|
|
queryByPrefix(query) {
|
|
const results = [];
|
|
const prefix = query.keyPrefix || '';
|
|
const namespace = query.namespace || this.config.defaultNamespace;
|
|
for (const [key, id] of this.keyIndex) {
|
|
if (key.startsWith(`${namespace}:${prefix}`)) {
|
|
const entry = this.entries.get(id);
|
|
if (entry)
|
|
results.push(entry);
|
|
}
|
|
}
|
|
return results;
|
|
}
|
|
queryByTags(query) {
|
|
if (!query.tags || query.tags.length === 0) {
|
|
return Array.from(this.entries.values());
|
|
}
|
|
// Get intersection of entries for all tags
|
|
let matchingIds = null;
|
|
for (const tag of query.tags) {
|
|
const tagIds = this.tagIndex.get(tag);
|
|
if (!tagIds) {
|
|
return []; // Tag doesn't exist
|
|
}
|
|
if (matchingIds === null) {
|
|
matchingIds = new Set(tagIds);
|
|
}
|
|
else {
|
|
// Intersect with previous results
|
|
for (const id of matchingIds) {
|
|
if (!tagIds.has(id)) {
|
|
matchingIds.delete(id);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if (!matchingIds)
|
|
return [];
|
|
const results = [];
|
|
for (const id of matchingIds) {
|
|
const entry = this.entries.get(id);
|
|
if (entry)
|
|
results.push(entry);
|
|
}
|
|
return results;
|
|
}
|
|
async querySemanticWithFilters(query) {
|
|
if (!query.content && !query.embedding) {
|
|
return this.queryWithFilters(query);
|
|
}
|
|
let embedding = query.embedding;
|
|
if (!embedding && query.content && this.config.embeddingGenerator) {
|
|
embedding = await this.config.embeddingGenerator(query.content);
|
|
}
|
|
if (!embedding) {
|
|
return this.queryWithFilters(query);
|
|
}
|
|
const searchResults = await this.search(embedding, {
|
|
k: query.limit * 2, // Over-fetch for filtering
|
|
threshold: query.threshold,
|
|
filters: query,
|
|
});
|
|
return searchResults.map((r) => r.entry);
|
|
}
|
|
queryWithFilters(query) {
|
|
let entries = [];
|
|
// Start with namespace filter if provided
|
|
if (query.namespace) {
|
|
const namespaceIds = this.namespaceIndex.get(query.namespace);
|
|
if (!namespaceIds)
|
|
return [];
|
|
for (const id of namespaceIds) {
|
|
const entry = this.entries.get(id);
|
|
if (entry)
|
|
entries.push(entry);
|
|
}
|
|
}
|
|
else {
|
|
entries = Array.from(this.entries.values());
|
|
}
|
|
return entries;
|
|
}
|
|
applyFilters(entries, query) {
|
|
return entries.filter((entry) => {
|
|
// Namespace filter
|
|
if (query.namespace && entry.namespace !== query.namespace) {
|
|
return false;
|
|
}
|
|
// Memory type filter
|
|
if (query.memoryType && entry.type !== query.memoryType) {
|
|
return false;
|
|
}
|
|
// Access level filter
|
|
if (query.accessLevel && entry.accessLevel !== query.accessLevel) {
|
|
return false;
|
|
}
|
|
// Owner filter
|
|
if (query.ownerId && entry.ownerId !== query.ownerId) {
|
|
return false;
|
|
}
|
|
// Tags filter
|
|
if (query.tags && query.tags.length > 0) {
|
|
if (!query.tags.every((tag) => entry.tags.includes(tag))) {
|
|
return false;
|
|
}
|
|
}
|
|
// Time range filters
|
|
if (query.createdAfter && entry.createdAt < query.createdAfter) {
|
|
return false;
|
|
}
|
|
if (query.createdBefore && entry.createdAt > query.createdBefore) {
|
|
return false;
|
|
}
|
|
if (query.updatedAfter && entry.updatedAt < query.updatedAfter) {
|
|
return false;
|
|
}
|
|
if (query.updatedBefore && entry.updatedAt > query.updatedBefore) {
|
|
return false;
|
|
}
|
|
// Expiration filter
|
|
if (!query.includeExpired && entry.expiresAt) {
|
|
if (entry.expiresAt < Date.now()) {
|
|
return false;
|
|
}
|
|
}
|
|
// Metadata filters
|
|
if (query.metadata) {
|
|
for (const [key, value] of Object.entries(query.metadata)) {
|
|
if (entry.metadata[key] !== value) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
});
|
|
}
|
|
updateAccessStats(entry) {
|
|
entry.accessCount++;
|
|
entry.lastAccessedAt = Date.now();
|
|
}
|
|
estimateMemoryUsage() {
|
|
let total = 0;
|
|
// Estimate entry storage
|
|
for (const entry of this.entries.values()) {
|
|
total += this.estimateEntrySize(entry);
|
|
}
|
|
// Add index memory
|
|
total += this.index.getStats().memoryUsage;
|
|
// Add cache memory
|
|
total += this.cache.getStats().memoryUsage;
|
|
return total;
|
|
}
|
|
estimateEntrySize(entry) {
|
|
let size = 0;
|
|
// Base object overhead
|
|
size += 100;
|
|
// String fields
|
|
size += (entry.id.length + entry.key.length + entry.content.length) * 2;
|
|
// Embedding (Float32Array)
|
|
if (entry.embedding) {
|
|
size += entry.embedding.length * 4;
|
|
}
|
|
// Tags and references
|
|
size += entry.tags.join('').length * 2;
|
|
size += entry.references.join('').length * 2;
|
|
// Metadata (rough estimate)
|
|
size += JSON.stringify(entry.metadata).length * 2;
|
|
return size;
|
|
}
|
|
checkStorageHealth(issues, recommendations) {
|
|
const utilizationPercent = (this.entries.size / this.config.maxEntries) * 100;
|
|
if (utilizationPercent > 95) {
|
|
issues.push('Storage utilization critical (>95%)');
|
|
recommendations.push('Increase maxEntries or cleanup old data');
|
|
return { status: 'unhealthy', latency: 0, message: 'Storage near capacity' };
|
|
}
|
|
if (utilizationPercent > 80) {
|
|
issues.push('Storage utilization high (>80%)');
|
|
recommendations.push('Consider cleanup or capacity increase');
|
|
return { status: 'degraded', latency: 0, message: 'Storage utilization high' };
|
|
}
|
|
return { status: 'healthy', latency: 0 };
|
|
}
|
|
checkIndexHealth(issues, recommendations) {
|
|
const stats = this.index.getStats();
|
|
if (stats.avgSearchTime > 10) {
|
|
issues.push('Index search time degraded (>10ms)');
|
|
recommendations.push('Consider rebuilding index or increasing ef');
|
|
return { status: 'degraded', latency: stats.avgSearchTime };
|
|
}
|
|
return { status: 'healthy', latency: stats.avgSearchTime };
|
|
}
|
|
checkCacheHealth(issues, recommendations) {
|
|
const stats = this.cache.getStats();
|
|
if (stats.hitRate < 0.5) {
|
|
issues.push('Cache hit rate low (<50%)');
|
|
recommendations.push('Consider increasing cache size');
|
|
return {
|
|
status: 'degraded',
|
|
latency: 0,
|
|
message: `Hit rate: ${(stats.hitRate * 100).toFixed(1)}%`,
|
|
};
|
|
}
|
|
return { status: 'healthy', latency: 0 };
|
|
}
|
|
async loadFromDisk() {
|
|
// Placeholder for persistence implementation
|
|
// Would use SQLite or file-based storage
|
|
this.emit('persistence:loaded');
|
|
}
|
|
async saveToDisk() {
|
|
// Placeholder for persistence implementation
|
|
this.emit('persistence:saved');
|
|
}
|
|
}
|
|
export default AgentDBAdapter;
|
|
//# sourceMappingURL=agentdb-adapter.js.map
|