@fluent-org/logger
Version:
A node fluent protocol compatible logger
84 lines • 2.5 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/**
* TS/JS representation of the [Fluentd EventTime](https://github.com/fluent/fluentd/wiki/Forward-Protocol-Specification-v1#eventtime-ext-format) type
*/
class EventTime {
/**
* Creates a new EventTime object
* @param epoch The epoch (seconds since midnight, Jan 1st, 1970)
* @param nano The nano part (epoch + nano = timestamp)
*/
constructor(epoch, nano) {
this._epoch = epoch;
this._nano = nano;
}
/**
* The epoch of this EventTime (seconds since midnight, Jan 1st, 1970)
*/
get epoch() {
return this._epoch;
}
/**
* The nano part of this EventTime (epoch + nano = timestamp nanos)
*/
get nano() {
return this._nano;
}
/**
* Packs the `EventTime` into a buffer
* @internal
* @param eventTime The `EventTime` object to pack
* @returns The serialized `EventTime`
*/
static pack(eventTime) {
const b = Buffer.allocUnsafe(8);
b.writeUInt32BE(eventTime.epoch, 0);
b.writeUInt32BE(eventTime.nano, 4);
return b;
}
/**
* Unpacks an `EventTime` from a buffer
* @internal
* @param buffer The buffer to read the `EventTime` from
* @returns The deserialized `EventTime`.
*/
static unpack(buffer) {
const e = buffer.readUInt32BE(0);
const n = buffer.readUInt32BE(4);
return new EventTime(e, n);
}
/**
* Returns the current timestamp as an `EventTime`
*
* Similar to `Date.now()`
* @returns The EventTime representation of the current timestamp
*/
static now() {
const now = Date.now();
return EventTime.fromTimestamp(now);
}
/**
* Converts a `Date` to an `EventTime`.
*
* @param date The `Date` object to convert
* @returns The equivalent `EventTime`.
*/
static fromDate(date) {
const t = date.getTime();
return EventTime.fromTimestamp(t);
}
/**
* Creates a new `EventTime` from a numeric timestamp
*
* @param t The numeric timestamp to convert to an EventTime
* @returns The EventTime representation of the timestamp
*/
static fromTimestamp(t) {
const epoch = Math.floor(t / 1000);
const nano = (t % 1000) * 1000000;
return new EventTime(epoch, nano);
}
}
exports.default = EventTime;
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