46 lines
874 B
TypeScript
46 lines
874 B
TypeScript
/**
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* Pricecaster Service.
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*
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* Fetcher backend component.
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*
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* (c) 2021 Randlabs, Inc.
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*/
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import { PriceTicker } from '../common/priceTicker'
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import { IStrategy } from './strategy'
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/**
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* A base class for queue-based buffer strategies
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*/
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export abstract class StrategyBase implements IStrategy {
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protected buffer!: PriceTicker[]
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protected bufSize!: number
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constructor (bufSize: number = 10) {
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this.createBuffer(bufSize)
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}
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createBuffer (maxSize: number): void {
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this.buffer = []
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this.bufSize = maxSize
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}
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clearBuffer (): void {
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this.buffer.length = 0
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}
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bufferCount (): number {
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return this.buffer.length
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}
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put (ticker: PriceTicker): boolean {
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if (this.buffer.length === this.bufSize) {
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this.buffer.shift()
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}
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this.buffer.push(ticker)
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return true
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}
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abstract getPrice(): PriceTicker | undefined
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}
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