72 lines
3.3 KiB
JavaScript
72 lines
3.3 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const Histogram_1 = require("./Histogram");
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const encoding_1 = require("./encoding");
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const formatters_1 = require("./formatters");
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const HISTOGRAM_LOG_FORMAT_VERSION = "1.3";
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const timeFormatter = formatters_1.floatFormatter(5, 3);
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class HistogramLogWriter {
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constructor(log) {
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this.log = log;
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/**
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* Base time to subtract from supplied histogram start/end timestamps when
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* logging based on histogram timestamps.
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* Base time is expected to be in msec since the epoch, as histogram start/end times
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* are typically stamped with absolute times in msec since the epoch.
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*/
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this.baseTime = 0;
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}
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/**
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* Output an interval histogram, with the given timestamp information and the [optional] tag
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* associated with the histogram, using a configurable maxValueUnitRatio. (note that the
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* specified timestamp information will be used, and the timestamp information in the actual
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* histogram will be ignored).
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* The max value reported with the interval line will be scaled by the given maxValueUnitRatio.
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* @param startTimeStampSec The start timestamp to log with the interval histogram, in seconds.
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* @param endTimeStampSec The end timestamp to log with the interval histogram, in seconds.
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* @param histogram The interval histogram to log.
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* @param maxValueUnitRatio The ratio by which to divide the histogram's max value when reporting on it.
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*/
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outputIntervalHistogram(histogram, startTimeStampSec = (histogram.startTimeStampMsec - this.baseTime) / 1000, endTimeStampSec = (histogram.endTimeStampMsec - this.baseTime) / 1000, maxValueUnitRatio = 1000) {
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const base64 = encoding_1.encodeIntoCompressedBase64(histogram);
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const start = timeFormatter(startTimeStampSec);
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const duration = timeFormatter(endTimeStampSec - startTimeStampSec);
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const max = timeFormatter(histogram.maxValue / maxValueUnitRatio);
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const lineContent = `${start},${duration},${max},${base64}\n`;
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if (histogram.tag && histogram.tag !== Histogram_1.NO_TAG) {
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this.log(`Tag=${histogram.tag},${lineContent}`);
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}
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else {
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this.log(lineContent);
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}
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}
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/**
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* Log a comment to the log.
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* Comments will be preceded with with the '#' character.
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* @param comment the comment string.
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*/
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outputComment(comment) {
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this.log(`#${comment}\n`);
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}
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/**
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* Log a start time in the log.
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* @param startTimeMsec time (in milliseconds) since the absolute start time (the epoch)
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*/
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outputStartTime(startTimeMsec) {
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this.outputComment(`[StartTime: ${formatters_1.floatFormatter(5, 3)(startTimeMsec / 1000)} (seconds since epoch), ${new Date(startTimeMsec)}]\n`);
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}
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/**
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* Output a legend line to the log.
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*/
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outputLegend() {
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this.log('"StartTimestamp","Interval_Length","Interval_Max","Interval_Compressed_Histogram"\n');
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}
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/**
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* Output a log format version to the log.
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*/
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outputLogFormatVersion() {
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this.outputComment("[Histogram log format version " + HISTOGRAM_LOG_FORMAT_VERSION + "]");
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}
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}
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exports.default = HistogramLogWriter;
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//# sourceMappingURL=HistogramLogWriter.js.map
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