caminho/dist/esm5/operators/batch.js

Tool for creating efficient data pipelines in a JavaScript environment

import { __awaiter, __generator, __read, __spreadArray } from "tslib";
import { bufferTime, filter, mergeAll, mergeMap } from 'rxjs';
import { getNewValueBag } from '../utils/valueBag';
export function batch(params, loggers) {
    var getBag = params.provides
        ? valueBagGetterBatchProvides(params.provides)
        : valueBagGetterBatchNoProvides();
    function wrappedStep(valueBag) {
        return __awaiter(this, void 0, void 0, function () {
            var startTime, values, newValueBags, err_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        loggers.onStepStarted(valueBag);
                        startTime = new Date();
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 3, , 4]);
                        return [4, params.fn(__spreadArray([], __read(valueBag), false))];
                    case 2:
                        values = _a.sent();
                        newValueBags = getBag(valueBag, values);
                        loggers.onStepFinished(newValueBags, startTime);
                        return [2, newValueBags];
                    case 3:
                        err_1 = _a.sent();
                        loggers.onStepFinished(valueBag, startTime, err_1);
                        throw err_1;
                    case 4: return [2];
                }
            });
        });
    }
    return function operatorApplier(observable) {
        return observable
            .pipe(bufferTime(params.batch.timeoutMs, undefined, params.batch.maxSize))
            .pipe(filter(function (buffer) { return 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(function (valueBag, index) { return getNewValueBag(valueBag, provides, values[index]); });
    };
}
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