66 lines
2.2 KiB
TypeScript
66 lines
2.2 KiB
TypeScript
import { getBaseClasses, ICommonObject, INode, INodeData, INodeParams } from '../../../src'
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import { BaseCache } from 'langchain/schema'
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import hash from 'object-hash'
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class InMemoryCache implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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inputs: INodeParams[]
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credential: INodeParams
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constructor() {
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this.label = 'InMemory Cache'
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this.name = 'inMemoryCache'
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this.version = 1.0
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this.type = 'InMemoryCache'
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this.description = 'Cache LLM response in memory, will be cleared once app restarted'
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this.icon = 'Memory.svg'
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this.category = 'Cache'
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this.baseClasses = [this.type, ...getBaseClasses(InMemoryCacheExtended)]
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this.inputs = []
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}
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async init(nodeData: INodeData, _: string, options: ICommonObject): Promise<any> {
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const memoryMap = options.cachePool.getLLMCache(options.chatflowid) ?? new Map()
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const inMemCache = new InMemoryCacheExtended(memoryMap)
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inMemCache.lookup = async (prompt: string, llmKey: string): Promise<any | null> => {
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const memory = options.cachePool.getLLMCache(options.chatflowid) ?? inMemCache.cache
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return Promise.resolve(memory.get(getCacheKey(prompt, llmKey)) ?? null)
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}
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inMemCache.update = async (prompt: string, llmKey: string, value: any): Promise<void> => {
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inMemCache.cache.set(getCacheKey(prompt, llmKey), value)
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options.cachePool.addLLMCache(options.chatflowid, inMemCache.cache)
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}
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return inMemCache
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}
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}
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const getCacheKey = (...strings: string[]): string => hash(strings.join('_'))
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class InMemoryCacheExtended extends BaseCache {
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cache: Map<string, any>
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constructor(map: Map<string, any>) {
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super()
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this.cache = map
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}
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lookup(prompt: string, llmKey: string): Promise<any | null> {
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return Promise.resolve(this.cache.get(getCacheKey(prompt, llmKey)) ?? null)
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}
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async update(prompt: string, llmKey: string, value: any): Promise<void> {
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this.cache.set(getCacheKey(prompt, llmKey), value)
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}
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}
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module.exports = { nodeClass: InMemoryCache }
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