caminho/dist/esm/operators/batch.js

Tool for creating efficient data pipelines in a JavaScript environment

import { bufferTime, filter, mergeAll, mergeMap } from 'rxjs';
import { getNewValueBag } from '../utils/valueBag';
export function batch(params, loggers) {
    const getBag = params.provides
        ? valueBagGetterBatchProvides(params.provides)
        : valueBagGetterBatchNoProvides();
    async function wrappedStep(valueBag) {
        loggers.onStepStarted(valueBag);
        const startTime = new Date();
        try {
            const values = await params.fn([...valueBag]);
            const newValueBags = getBag(valueBag, values);
            loggers.onStepFinished(newValueBags, startTime);
            return newValueBags;
        }
        catch (err) {
            loggers.onStepFinished(valueBag, startTime, err);
            throw err;
        }
    }
    return function operatorApplier(observable) {
        return observable
            .pipe(bufferTime(params.batch.timeoutMs, undefined, params.batch.maxSize))
            .pipe(filter((buffer) => buffer.length > 0))
            .pipe(mergeMap(wrappedStep, params.maxConcurrency))
            .pipe(mergeAll());
    };
}
export function valueBagGetterBatchNoProvides() {
    return function getValueBag(valueBag) {
        return valueBag;
    };
}
export function valueBagGetterBatchProvides(provides) {
    return function getValueBagWithProvides(valueBags, values) {
        return valueBags.map((valueBag, index) => getNewValueBag(valueBag, provides, values[index]));
    };
}
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