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anonpenguin f58fa0caf7 Add coverage prettify styles and scripts, sorting functionality, and search feature 
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2025-06-19 11:20:26 +03:00

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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">import { ShardingConfig, StoreType } from '../types/framework';
import { FrameworkOrbitDBService } from '../services/OrbitDBService';
&nbsp;
export interface ShardInfo {
name: string;
index: number;
database: any;
address: string;
}
&nbsp;
export class ShardManager {
private orbitDBService?: FrameworkOrbitDBService;
private shards: Map&lt;string, ShardInfo[]&gt; = <span class="cstat-no" title="statement not covered" >new Map();</span>
private shardConfigs: Map&lt;string, ShardingConfig&gt; = <span class="cstat-no" title="statement not covered" >new Map();</span>
&nbsp;
<span class="fstat-no" title="function not covered" > setOrbitDBService(</span>service: FrameworkOrbitDBService): void {
<span class="cstat-no" title="statement not covered" > this.orbitDBService = service;</span>
}
&nbsp;
<span class="fstat-no" title="function not covered" > async </span>createShards(
modelName: string,
config: ShardingConfig,
dbType: StoreType = <span class="branch-0 cbranch-no" title="branch not covered" >'docstore',</span>
): Promise&lt;void&gt; {
<span class="cstat-no" title="statement not covered" > if (!this.orbitDBService) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error('OrbitDB service not initialized');</span>
}
&nbsp;
<span class="cstat-no" title="statement not covered" > console.log(`🔀 Creating ${config.count} shards for model: ${modelName}`);</span>
&nbsp;
const shards: ShardInfo[] = <span class="cstat-no" title="statement not covered" >[];</span>
<span class="cstat-no" title="statement not covered" > this.shardConfigs.set(modelName, config);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > for (let i = <span class="cstat-no" title="statement not covered" >0;</span> i &lt; config.count; i++) {</span>
const shardName = <span class="cstat-no" title="statement not covered" >`${modelName.toLowerCase()}-shard-${i}`;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > try {</span>
const shard = <span class="cstat-no" title="statement not covered" >await this.createShard(shardName, i, dbType);</span>
<span class="cstat-no" title="statement not covered" > shards.push(shard);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > console.log(`✓ Created shard: ${shardName} (${shard.address})`);</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.error(`❌ Failed to create shard ${shardName}:`, error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
&nbsp;
<span class="cstat-no" title="statement not covered" > this.shards.set(modelName, shards);</span>
<span class="cstat-no" title="statement not covered" > console.log(`✅ Created ${shards.length} shards for ${modelName}`);</span>
}
&nbsp;
<span class="fstat-no" title="function not covered" > getShardForKey(</span>modelName: string, key: string): ShardInfo {
const shards = <span class="cstat-no" title="statement not covered" >this.shards.get(modelName);</span>
<span class="cstat-no" title="statement not covered" > if (!shards || shards.length === 0) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`No shards found for model ${modelName}`);</span>
}
&nbsp;
const config = <span class="cstat-no" title="statement not covered" >this.shardConfigs.get(modelName);</span>
<span class="cstat-no" title="statement not covered" > if (!config) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`No shard configuration found for model ${modelName}`);</span>
}
&nbsp;
const shardIndex = <span class="cstat-no" title="statement not covered" >this.calculateShardIndex(key, shards.length, config.strategy);</span>
<span class="cstat-no" title="statement not covered" > return shards[shardIndex];</span>
}
&nbsp;
<span class="fstat-no" title="function not covered" > getAllShards(</span>modelName: string): ShardInfo[] {
<span class="cstat-no" title="statement not covered" > return this.shards.get(modelName) || [];</span>
}
&nbsp;
<span class="fstat-no" title="function not covered" > getShardByIndex(</span>modelName: string, index: number): ShardInfo | undefined {
const shards = <span class="cstat-no" title="statement not covered" >this.shards.get(modelName);</span>
<span class="cstat-no" title="statement not covered" > if (!shards || index &lt; 0 || index &gt;= shards.length) {</span>
<span class="cstat-no" title="statement not covered" > return undefined;</span>
}
<span class="cstat-no" title="statement not covered" > return shards[index];</span>
}
&nbsp;
<span class="fstat-no" title="function not covered" > getShardCount(</span>modelName: string): number {
const shards = <span class="cstat-no" title="statement not covered" >this.shards.get(modelName);</span>
<span class="cstat-no" title="statement not covered" > return shards ? shards.length : 0;</span>
}
&nbsp;
private <span class="fstat-no" title="function not covered" >calculateShardIndex(</span>
key: string,
shardCount: number,
strategy: ShardingConfig['strategy'],
): number {
<span class="cstat-no" title="statement not covered" > switch (strategy) {</span>
case 'hash':
<span class="cstat-no" title="statement not covered" > return this.hashSharding(key, shardCount);</span>
&nbsp;
case 'range':
<span class="cstat-no" title="statement not covered" > return this.rangeSharding(key, shardCount);</span>
&nbsp;
case 'user':
<span class="cstat-no" title="statement not covered" > return this.userSharding(key, shardCount);</span>
&nbsp;
default:
<span class="cstat-no" title="statement not covered" > throw new Error(`Unsupported sharding strategy: ${strategy}`);</span>
}
}
&nbsp;
private <span class="fstat-no" title="function not covered" >hashSharding(</span>key: string, shardCount: number): number {
// Consistent hash-based sharding
let hash = <span class="cstat-no" title="statement not covered" >0;</span>
<span class="cstat-no" title="statement not covered" > for (let i = <span class="cstat-no" title="statement not covered" >0;</span> i &lt; key.length; i++) {</span>
<span class="cstat-no" title="statement not covered" > hash = ((hash &lt;&lt; 5) - hash + key.charCodeAt(i)) &amp; 0xffffffff;</span>
}
<span class="cstat-no" title="statement not covered" > return Math.abs(hash) % shardCount;</span>
}
&nbsp;
private <span class="fstat-no" title="function not covered" >rangeSharding(</span>key: string, shardCount: number): number {
// Range-based sharding (alphabetical)
const firstChar = <span class="cstat-no" title="statement not covered" >key.charAt(0).toLowerCase();</span>
const charCode = <span class="cstat-no" title="statement not covered" >firstChar.charCodeAt(0);</span>
&nbsp;
// Map a-z (97-122) to shard indices
const normalizedCode = <span class="cstat-no" title="statement not covered" >Math.max(97, Math.min(122, charCode));</span>
const range = <span class="cstat-no" title="statement not covered" >(normalizedCode - 97) / 25;</span> // 0-1 range
&nbsp;
<span class="cstat-no" title="statement not covered" > return Math.floor(range * shardCount);</span>
}
&nbsp;
private <span class="fstat-no" title="function not covered" >userSharding(</span>key: string, shardCount: number): number {
// User-based sharding - similar to hash but optimized for user IDs
<span class="cstat-no" title="statement not covered" > return this.hashSharding(key, shardCount);</span>
}
&nbsp;
private <span class="fstat-no" title="function not covered" >async </span>createShard(
shardName: string,
index: number,
dbType: StoreType,
): Promise&lt;ShardInfo&gt; {
<span class="cstat-no" title="statement not covered" > if (!this.orbitDBService) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error('OrbitDB service not initialized');</span>
}
&nbsp;
const database = <span class="cstat-no" title="statement not covered" >await this.orbitDBService.openDatabase(shardName, dbType);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > return {</span>
name: shardName,
index,
database,
address: database.address.toString(),
};
}
&nbsp;
// Global indexing support
<span class="fstat-no" title="function not covered" > async </span>createGlobalIndex(modelName: string, indexName: string): Promise&lt;void&gt; {
<span class="cstat-no" title="statement not covered" > if (!this.orbitDBService) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error('OrbitDB service not initialized');</span>
}
&nbsp;
<span class="cstat-no" title="statement not covered" > console.log(`📇 Creating global index: ${indexName} for model: ${modelName}`);</span>
&nbsp;
// Create sharded global index
const INDEX_SHARD_COUNT = <span class="cstat-no" title="statement not covered" >4;</span> // Configurable
const indexShards: ShardInfo[] = <span class="cstat-no" title="statement not covered" >[];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > for (let i = <span class="cstat-no" title="statement not covered" >0;</span> i &lt; INDEX_SHARD_COUNT; i++) {</span>
const indexShardName = <span class="cstat-no" title="statement not covered" >`${indexName}-shard-${i}`;</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > try {</span>
const shard = <span class="cstat-no" title="statement not covered" >await this.createShard(indexShardName, i, 'keyvalue');</span>
<span class="cstat-no" title="statement not covered" > indexShards.push(shard);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > console.log(`✓ Created index shard: ${indexShardName}`);</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.error(`❌ Failed to create index shard ${indexShardName}:`, error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
&nbsp;
// Store index shards
<span class="cstat-no" title="statement not covered" > this.shards.set(indexName, indexShards);</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > console.log(`✅ Created global index ${indexName} with ${indexShards.length} shards`);</span>
}
&nbsp;
<span class="fstat-no" title="function not covered" > async </span>addToGlobalIndex(indexName: string, key: string, value: any): Promise&lt;void&gt; {
const indexShards = <span class="cstat-no" title="statement not covered" >this.shards.get(indexName);</span>
<span class="cstat-no" title="statement not covered" > if (!indexShards) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`Global index ${indexName} not found`);</span>
}
&nbsp;
// Determine which shard to use for this key
const shardIndex = <span class="cstat-no" title="statement not covered" >this.hashSharding(key, indexShards.length);</span>
const shard = <span class="cstat-no" title="statement not covered" >indexShards[shardIndex];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > try {</span>
// For keyvalue stores, we use set
<span class="cstat-no" title="statement not covered" > await shard.database.set(key, value);</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.error(`Failed to add to global index ${indexName}:`, error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
&nbsp;
<span class="fstat-no" title="function not covered" > async </span>getFromGlobalIndex(indexName: string, key: string): Promise&lt;any&gt; {
const indexShards = <span class="cstat-no" title="statement not covered" >this.shards.get(indexName);</span>
<span class="cstat-no" title="statement not covered" > if (!indexShards) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`Global index ${indexName} not found`);</span>
}
&nbsp;
// Determine which shard contains this key
const shardIndex = <span class="cstat-no" title="statement not covered" >this.hashSharding(key, indexShards.length);</span>
const shard = <span class="cstat-no" title="statement not covered" >indexShards[shardIndex];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > try {</span>
<span class="cstat-no" title="statement not covered" > return await shard.database.get(key);</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.error(`Failed to get from global index ${indexName}:`, error);</span>
<span class="cstat-no" title="statement not covered" > return null;</span>
}
}
&nbsp;
<span class="fstat-no" title="function not covered" > async </span>removeFromGlobalIndex(indexName: string, key: string): Promise&lt;void&gt; {
const indexShards = <span class="cstat-no" title="statement not covered" >this.shards.get(indexName);</span>
<span class="cstat-no" title="statement not covered" > if (!indexShards) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`Global index ${indexName} not found`);</span>
}
&nbsp;
// Determine which shard contains this key
const shardIndex = <span class="cstat-no" title="statement not covered" >this.hashSharding(key, indexShards.length);</span>
const shard = <span class="cstat-no" title="statement not covered" >indexShards[shardIndex];</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > try {</span>
<span class="cstat-no" title="statement not covered" > await shard.database.del(key);</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.error(`Failed to remove from global index ${indexName}:`, error);</span>
<span class="cstat-no" title="statement not covered" > throw error;</span>
}
}
&nbsp;
// Query all shards for a model
<span class="fstat-no" title="function not covered" > async </span>queryAllShards(
modelName: string,
queryFn: (database: any) =&gt; Promise&lt;any[]&gt;,
): Promise&lt;any[]&gt; {
const shards = <span class="cstat-no" title="statement not covered" >this.shards.get(modelName);</span>
<span class="cstat-no" title="statement not covered" > if (!shards) {</span>
<span class="cstat-no" title="statement not covered" > throw new Error(`No shards found for model ${modelName}`);</span>
}
&nbsp;
const results: any[] = <span class="cstat-no" title="statement not covered" >[];</span>
&nbsp;
// Query all shards in parallel
const promises = <span class="cstat-no" title="statement not covered" >shards.map(<span class="fstat-no" title="function not covered" >async </span>(shard) =&gt; {</span>
<span class="cstat-no" title="statement not covered" > try {</span>
<span class="cstat-no" title="statement not covered" > return await queryFn(shard.database);</span>
} catch (error) {
<span class="cstat-no" title="statement not covered" > console.warn(`Query failed on shard ${shard.name}:`, error);</span>
<span class="cstat-no" title="statement not covered" > return [];</span>
}
});
&nbsp;
const shardResults = <span class="cstat-no" title="statement not covered" >await Promise.all(promises);</span>
&nbsp;
// Flatten results
<span class="cstat-no" title="statement not covered" > for (const shardResult of shardResults) {</span>
<span class="cstat-no" title="statement not covered" > results.push(...shardResult);</span>
}
&nbsp;
<span class="cstat-no" title="statement not covered" > return results;</span>
}
&nbsp;
// Statistics and monitoring
<span class="fstat-no" title="function not covered" > getShardStatistics(</span>modelName: string): any {
const shards = <span class="cstat-no" title="statement not covered" >this.shards.get(modelName);</span>
<span class="cstat-no" title="statement not covered" > if (!shards) {</span>
<span class="cstat-no" title="statement not covered" > return null;</span>
}
&nbsp;
<span class="cstat-no" title="statement not covered" > return {</span>
modelName,
shardCount: shards.length,
shards: shards.map(<span class="fstat-no" title="function not covered" >(s</span>hard) =&gt; (<span class="cstat-no" title="statement not covered" >{</span>
name: shard.name,
index: shard.index,
address: shard.address,
})),
};
}
&nbsp;
<span class="fstat-no" title="function not covered" > getAllModelsWithShards(</span>): string[] {
<span class="cstat-no" title="statement not covered" > return Array.from(this.shards.keys());</span>
}
&nbsp;
// Cleanup
<span class="fstat-no" title="function not covered" > async </span>stop(): Promise&lt;void&gt; {
<span class="cstat-no" title="statement not covered" > console.log('🛑 Stopping ShardManager...');</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > this.shards.clear();</span>
<span class="cstat-no" title="statement not covered" > this.shardConfigs.clear();</span>
&nbsp;
<span class="cstat-no" title="statement not covered" > console.log('✅ ShardManager stopped');</span>
}
}
&nbsp;</pre></td></tr></table></pre>
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