30 lines
829 B
JavaScript
30 lines
829 B
JavaScript
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"use strict";
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var utils = require("../utils");
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var GenericWorker = require("./GenericWorker");
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/**
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* A worker which calculate the total length of the data flowing through.
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* @constructor
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* @param {String} propName the name used to expose the length
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*/
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function DataLengthProbe(propName) {
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GenericWorker.call(this, "DataLengthProbe for " + propName);
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this.propName = propName;
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this.withStreamInfo(propName, 0);
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}
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utils.inherits(DataLengthProbe, GenericWorker);
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/**
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* @see GenericWorker.processChunk
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*/
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DataLengthProbe.prototype.processChunk = function (chunk) {
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if(chunk) {
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var length = this.streamInfo[this.propName] || 0;
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this.streamInfo[this.propName] = length + chunk.data.length;
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}
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GenericWorker.prototype.processChunk.call(this, chunk);
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};
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module.exports = DataLengthProbe;
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