@glue42/bbg-market-data/dist/es2015/seq.js

A high-level API that wraps existing Glue42 Bloomberg Bridge Market Data interop methods. The API is based on the jBloomberg open source wrapper.

import { __awaiter } from "tslib";
export const createSequence = () => {
    const queue = [];
    let isExecuting = false;
    let isRun = false;
    const run = () => __awaiter(void 0, void 0, void 0, function* () {
        if (isExecuting) {
            return;
        }
        isExecuting = true;
        while (queue.length > 0) {
            const nextItem = queue.shift();
            if (typeof nextItem === "undefined") {
                break;
            }
            if (!isRun) {
                break;
            }
            const { action, resolve, reject } = nextItem;
            try {
                const result = yield action();
                resolve(result);
            }
            catch (error) {
                reject(error);
            }
        }
        isExecuting = false;
    });
    const enqueue = (action) => __awaiter(void 0, void 0, void 0, function* () {
        return new Promise((resolve, reject) => {
            queue.push({ action, resolve, reject });
            if (isRun) {
                run();
            }
        });
    });
    const clear = () => {
        isExecuting = false;
        isRun = false;
        queue.splice(0, queue.length);
    };
    return {
        run: () => {
            isRun = true;
            run();
        },
        enqueue,
        clear,
    };
};