caminho/dist/cjs/operators/batch.js

Tool for creating efficient data pipelines in a JavaScript environment

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.batch = batch;
exports.valueBagGetterBatchNoProvides = valueBagGetterBatchNoProvides;
exports.valueBagGetterBatchProvides = valueBagGetterBatchProvides;
const rxjs_1 = require("rxjs");
const valueBag_1 = require("../utils/valueBag");
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((0, rxjs_1.bufferTime)(params.batch.timeoutMs, undefined, params.batch.maxSize))
            .pipe((0, rxjs_1.filter)((buffer) => buffer.length > 0))
            .pipe((0, rxjs_1.mergeMap)(wrappedStep, params.maxConcurrency))
            .pipe((0, rxjs_1.mergeAll)());
    };
}
function valueBagGetterBatchNoProvides() {
    return function getValueBag(valueBag) {
        return valueBag;
    };
}
function valueBagGetterBatchProvides(provides) {
    return function getValueBagWithProvides(valueBags, values) {
        return valueBags.map((valueBag, index) => (0, valueBag_1.getNewValueBag)(valueBag, provides, values[index]));
    };
}
//# sourceMappingURL=batch.js.map