rpc_ts/lib/examples/server_stream/handler.js

Remote Procedure Calls in TypeScript made simple

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * Return a handler where the methods of the BankingService are actually implemented.
 *
 * We wrap it in a function to allow for closures, so that you can have variables scoped
 * to the lifetime of the server (such as the mock store `users` in this instance).
 */
exports.getNumberHandler = () => {
    return {
        async increment({ value }) {
            return { value: value + 1 };
        },
        /** Server-side streams are offered with a slightly different signature */
        async streamNumbers({ max, sleepMs }, { onReady, onMessage }) {
            // Calling 'onReady' is mandatory before any call to 'onMessage'.
            // 'onReady' allows us to pass a callback for early cancellation.
            let closed = false;
            onReady(() => {
                closed = true;
            });
            for (let counter = 0; counter < max; ++counter) {
                // If the stream has been closed, exit early
                if (closed) {
                    break;
                }
                onMessage({ counter });
                await sleep(sleepMs);
            }
        },
    };
};
/**
 * Like setTimeout but with promises
 */
async function sleep(timeInMillis) {
    return new Promise(y => setTimeout(y, timeInMillis));
}
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