awscdk-construct-scte-scheduler
Version:
AWS CDK Construct for scheduling SCTE-35 events using the MediaLive schedule API
49 lines (48 loc) • 1.63 kB
JavaScript
import { runPolling } from "./poller";
import { validateWaiterOptions } from "./utils/validate";
import { WaiterState, waiterServiceDefaults } from "./waiter";
const abortTimeout = (abortSignal) => {
let onAbort;
const promise = new Promise((resolve) => {
onAbort = () => resolve({ state: WaiterState.ABORTED });
if (typeof abortSignal.addEventListener === "function") {
abortSignal.addEventListener("abort", onAbort);
}
else {
abortSignal.onabort = onAbort;
}
});
return {
clearListener() {
if (typeof abortSignal.removeEventListener === "function") {
abortSignal.removeEventListener("abort", onAbort);
}
},
aborted: promise,
};
};
export const createWaiter = async (options, input, acceptorChecks) => {
const params = {
...waiterServiceDefaults,
...options,
};
validateWaiterOptions(params);
const exitConditions = [runPolling(params, input, acceptorChecks)];
const finalize = [];
if (options.abortSignal) {
const { aborted, clearListener } = abortTimeout(options.abortSignal);
finalize.push(clearListener);
exitConditions.push(aborted);
}
if (options.abortController?.signal) {
const { aborted, clearListener } = abortTimeout(options.abortController.signal);
finalize.push(clearListener);
exitConditions.push(aborted);
}
return Promise.race(exitConditions).then((result) => {
for (const fn of finalize) {
fn();
}
return result;
});
};