awscdk-construct-pipeline-pause-scheduler
Version:
CDK Construct for toggling MediaLive pipeline pause/unpause
54 lines (53 loc) • 1.81 kB
JavaScript
export const createIsIdentityExpiredFunction = (expirationMs) => (identity) => doesIdentityRequireRefresh(identity) && identity.expiration.getTime() - Date.now() < expirationMs;
export const EXPIRATION_MS = 300000;
export const isIdentityExpired = createIsIdentityExpiredFunction(EXPIRATION_MS);
export const doesIdentityRequireRefresh = (identity) => identity.expiration !== undefined;
export const memoizeIdentityProvider = (provider, isExpired, requiresRefresh) => {
if (provider === undefined) {
return undefined;
}
const normalizedProvider = typeof provider !== "function" ? async () => Promise.resolve(provider) : provider;
let resolved;
let pending;
let hasResult;
let isConstant = false;
const coalesceProvider = async (options) => {
if (!pending) {
pending = normalizedProvider(options);
}
try {
resolved = await pending;
hasResult = true;
isConstant = false;
}
finally {
pending = undefined;
}
return resolved;
};
if (isExpired === undefined) {
return async (options) => {
if (!hasResult || options?.forceRefresh) {
resolved = await coalesceProvider(options);
}
return resolved;
};
}
return async (options) => {
if (!hasResult || options?.forceRefresh) {
resolved = await coalesceProvider(options);
}
if (isConstant) {
return resolved;
}
if (!requiresRefresh(resolved)) {
isConstant = true;
return resolved;
}
if (isExpired(resolved)) {
await coalesceProvider(options);
return resolved;
}
return resolved;
};
};