58 lines
1.4 KiB
TypeScript
58 lines
1.4 KiB
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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* Copyright 2022 Wormhole Project Contributors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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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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