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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 | import { ShardingConfig, StoreType } from '../types/framework'; import { FrameworkOrbitDBService } from '../services/OrbitDBService'; export interface ShardInfo { name: string; index: number; database: any; address: string; } export class ShardManager { private orbitDBService?: FrameworkOrbitDBService; private shards: Map<string, ShardInfo[]> = new Map(); private shardConfigs: Map<string, ShardingConfig> = new Map(); setOrbitDBService(service: FrameworkOrbitDBService): void { this.orbitDBService = service; } async createShards( modelName: string, config: ShardingConfig, dbType: StoreType = 'docstore', ): Promise<void> { if (!this.orbitDBService) { throw new Error('OrbitDB service not initialized'); } console.log(`🔀 Creating ${config.count} shards for model: ${modelName}`); const shards: ShardInfo[] = []; this.shardConfigs.set(modelName, config); for (let i = 0; i < config.count; i++) { const shardName = `${modelName.toLowerCase()}-shard-${i}`; try { const shard = await this.createShard(shardName, i, dbType); shards.push(shard); console.log(`✓ Created shard: ${shardName} (${shard.address})`); } catch (error) { console.error(`❌ Failed to create shard ${shardName}:`, error); throw error; } } this.shards.set(modelName, shards); console.log(`✅ Created ${shards.length} shards for ${modelName}`); } getShardForKey(modelName: string, key: string): ShardInfo { const shards = this.shards.get(modelName); if (!shards || shards.length === 0) { throw new Error(`No shards found for model ${modelName}`); } const config = this.shardConfigs.get(modelName); if (!config) { throw new Error(`No shard configuration found for model ${modelName}`); } const shardIndex = this.calculateShardIndex(key, shards.length, config.strategy); return shards[shardIndex]; } getAllShards(modelName: string): ShardInfo[] { return this.shards.get(modelName) || []; } getShardByIndex(modelName: string, index: number): ShardInfo | undefined { const shards = this.shards.get(modelName); if (!shards || index < 0 || index >= shards.length) { return undefined; } return shards[index]; } getShardCount(modelName: string): number { const shards = this.shards.get(modelName); return shards ? shards.length : 0; } private calculateShardIndex( key: string, shardCount: number, strategy: ShardingConfig['strategy'], ): number { switch (strategy) { case 'hash': return this.hashSharding(key, shardCount); case 'range': return this.rangeSharding(key, shardCount); case 'user': return this.userSharding(key, shardCount); default: throw new Error(`Unsupported sharding strategy: ${strategy}`); } } private hashSharding(key: string, shardCount: number): number { // Consistent hash-based sharding let hash = 0; for (let i = 0; i < key.length; i++) { hash = ((hash << 5) - hash + key.charCodeAt(i)) & 0xffffffff; } return Math.abs(hash) % shardCount; } private rangeSharding(key: string, shardCount: number): number { // Range-based sharding (alphabetical) const firstChar = key.charAt(0).toLowerCase(); const charCode = firstChar.charCodeAt(0); // Map a-z (97-122) to shard indices const normalizedCode = Math.max(97, Math.min(122, charCode)); const range = (normalizedCode - 97) / 25; // 0-1 range return Math.floor(range * shardCount); } private userSharding(key: string, shardCount: number): number { // User-based sharding - similar to hash but optimized for user IDs return this.hashSharding(key, shardCount); } private async createShard( shardName: string, index: number, dbType: StoreType, ): Promise<ShardInfo> { if (!this.orbitDBService) { throw new Error('OrbitDB service not initialized'); } const database = await this.orbitDBService.openDatabase(shardName, dbType); return { name: shardName, index, database, address: database.address.toString(), }; } // Global indexing support async createGlobalIndex(modelName: string, indexName: string): Promise<void> { if (!this.orbitDBService) { throw new Error('OrbitDB service not initialized'); } console.log(`📇 Creating global index: ${indexName} for model: ${modelName}`); // Create sharded global index const INDEX_SHARD_COUNT = 4; // Configurable const indexShards: ShardInfo[] = []; for (let i = 0; i < INDEX_SHARD_COUNT; i++) { const indexShardName = `${indexName}-shard-${i}`; try { const shard = await this.createShard(indexShardName, i, 'keyvalue'); indexShards.push(shard); console.log(`✓ Created index shard: ${indexShardName}`); } catch (error) { console.error(`❌ Failed to create index shard ${indexShardName}:`, error); throw error; } } // Store index shards this.shards.set(indexName, indexShards); console.log(`✅ Created global index ${indexName} with ${indexShards.length} shards`); } async addToGlobalIndex(indexName: string, key: string, value: any): Promise<void> { const indexShards = this.shards.get(indexName); if (!indexShards) { throw new Error(`Global index ${indexName} not found`); } // Determine which shard to use for this key const shardIndex = this.hashSharding(key, indexShards.length); const shard = indexShards[shardIndex]; try { // For keyvalue stores, we use set await shard.database.set(key, value); } catch (error) { console.error(`Failed to add to global index ${indexName}:`, error); throw error; } } async getFromGlobalIndex(indexName: string, key: string): Promise<any> { const indexShards = this.shards.get(indexName); if (!indexShards) { throw new Error(`Global index ${indexName} not found`); } // Determine which shard contains this key const shardIndex = this.hashSharding(key, indexShards.length); const shard = indexShards[shardIndex]; try { return await shard.database.get(key); } catch (error) { console.error(`Failed to get from global index ${indexName}:`, error); return null; } } async removeFromGlobalIndex(indexName: string, key: string): Promise<void> { const indexShards = this.shards.get(indexName); if (!indexShards) { throw new Error(`Global index ${indexName} not found`); } // Determine which shard contains this key const shardIndex = this.hashSharding(key, indexShards.length); const shard = indexShards[shardIndex]; try { await shard.database.del(key); } catch (error) { console.error(`Failed to remove from global index ${indexName}:`, error); throw error; } } // Query all shards for a model async queryAllShards( modelName: string, queryFn: (database: any) => Promise<any[]>, ): Promise<any[]> { const shards = this.shards.get(modelName); if (!shards) { throw new Error(`No shards found for model ${modelName}`); } const results: any[] = []; // Query all shards in parallel const promises = shards.map(async (shard) => { try { return await queryFn(shard.database); } catch (error) { console.warn(`Query failed on shard ${shard.name}:`, error); return []; } }); const shardResults = await Promise.all(promises); // Flatten results for (const shardResult of shardResults) { results.push(...shardResult); } return results; } // Statistics and monitoring getShardStatistics(modelName: string): any { const shards = this.shards.get(modelName); if (!shards) { return null; } return { modelName, shardCount: shards.length, shards: shards.map((shard) => ({ name: shard.name, index: shard.index, address: shard.address, })), }; } getAllModelsWithShards(): string[] { return Array.from(this.shards.keys()); } // Cleanup async stop(): Promise<void> { console.log('🛑 Stopping ShardManager...'); this.shards.clear(); this.shardConfigs.clear(); console.log('✅ ShardManager stopped'); } } |