resume-client-socket.io
Version:
Resume Client API for Socket.IO and Node.JS - Medical Speech to Summarized Text
317 lines • 30.4 kB
JavaScript
Object.defineProperty(exports, "__esModule", { value: true });
const Debug = require("debug");
const eventemitter2_1 = require("eventemitter2");
const EWMA_1 = require("./EWMA");
const histogram_1 = require("./metrics/histogram");
const fclone = (data) => JSON.parse(JSON.stringify(data));
const log = Debug('axm:features:tracing:aggregator');
class TransactionAggregator extends eventemitter2_1.EventEmitter2 {
constructor() {
super(...arguments);
this.spanTypes = ['redis', 'mysql', 'pg', 'mongo', 'outbound_http'];
this.cache = {
routes: {},
meta: {
trace_count: 0,
http_meter: new EWMA_1.default(),
db_meter: new EWMA_1.default(),
histogram: new histogram_1.default({ measurement: 'median' }),
db_histograms: {}
}
};
this.privacyRegex = /":(?!\[|{)\\"[^"]*\\"|":(["'])(?:(?=(\\?))\2.)*?\1|":(?!\[|{)[^,}\]]*|":\[[^{]*]/g;
}
init(sendInterval = 30000) {
this.worker = setInterval(_ => {
let data = this.prepareAggregationforShipping();
this.emit('packet', { data });
}, sendInterval);
}
destroy() {
if (this.worker !== undefined) {
clearInterval(this.worker);
}
this.cache.routes = {};
}
getAggregation() {
return this.cache;
}
validateData(packet) {
if (!packet) {
log('Packet malformated', packet);
return false;
}
if (!packet.spans || !packet.spans[0]) {
log('Trace without spans: %s', Object.keys(packet.data));
return false;
}
if (!packet.spans[0].labels) {
log('Trace spans without labels: %s', Object.keys(packet.spans));
return false;
}
return true;
}
aggregate(packet) {
if (this.validateData(packet) === false)
return false;
let path = packet.spans[0].labels['http/path'];
if (process.env.PM2_APM_CENSOR_SPAMS !== '0') {
this.censorSpans(packet.spans);
}
packet.spans = packet.spans.filter((span) => {
return span.endTime !== span.startTime;
});
packet.spans.forEach((span) => {
span.mean = Math.round(new Date(span.endTime).getTime() - new Date(span.startTime).getTime());
delete span.endTime;
});
packet.spans.forEach((span) => {
if (!span.name || !span.kind)
return false;
if (span.kind === 'RPC_SERVER') {
this.cache.meta.histogram.update(span.mean);
return this.cache.meta.http_meter.update(1);
}
if (span.labels && span.labels['http/method'] && span.labels['http/status_code']) {
span.labels['service'] = span.name;
span.name = 'outbound_http';
}
for (let i = 0; i < this.spanTypes.length; i++) {
if (span.name.indexOf(this.spanTypes[i]) > -1) {
this.cache.meta.db_meter.update(1);
if (!this.cache.meta.db_histograms[this.spanTypes[i]]) {
this.cache.meta.db_histograms[this.spanTypes[i]] = new histogram_1.default({ measurement: 'mean' });
}
this.cache.meta.db_histograms[this.spanTypes[i]].update(span.mean);
break;
}
}
});
this.cache.meta.trace_count++;
if (path[0] === '/' && path !== '/') {
path = path.substr(1, path.length - 1);
}
let matched = this.matchPath(path, this.cache.routes);
if (!matched) {
this.cache.routes[path] = [];
this.mergeTrace(this.cache.routes[path], packet);
}
else {
this.mergeTrace(this.cache.routes[matched], packet);
}
return this.cache;
}
mergeTrace(aggregated, trace) {
if (!aggregated || !trace)
return;
if (trace.spans.length === 0)
return;
if (!aggregated.variances)
aggregated.variances = [];
if (!aggregated.meta) {
aggregated.meta = {
histogram: new histogram_1.default({ measurement: 'median' }),
meter: new EWMA_1.default()
};
}
aggregated.meta.histogram.update(trace.spans[0].mean);
aggregated.meta.meter.update();
const merge = (variance) => {
if (variance == null) {
delete trace.projectId;
delete trace.traceId;
trace.histogram = new histogram_1.default({ measurement: 'median' });
trace.histogram.update(trace.spans[0].mean);
trace.spans.forEach((span) => {
span.histogram = new histogram_1.default({ measurement: 'median' });
span.histogram.update(span.mean);
delete span.mean;
});
aggregated.variances.push(trace);
}
else {
variance.histogram.update(trace.spans[0].mean);
this.updateSpanDuration(variance.spans, trace.spans);
trace.spans.forEach((span) => {
delete span.labels.stacktrace;
});
}
};
for (let i = 0; i < aggregated.variances.length; i++) {
if (this.compareList(aggregated.variances[i].spans, trace.spans)) {
return merge(aggregated.variances[i]);
}
}
return merge(null);
}
updateSpanDuration(spans, newSpans) {
for (let i = 0; i < spans.length; i++) {
if (!newSpans[i])
continue;
spans[i].histogram.update(newSpans[i].mean);
}
}
compareList(one, two) {
if (one.length !== two.length)
return false;
for (let i = 0; i < one.length; i++) {
if (one[i].name !== two[i].name)
return false;
if (one[i].kind !== two[i].kind)
return false;
if (!one[i].labels && two[i].labels)
return false;
if (one[i].labels && !two[i].labels)
return false;
if (one[i].labels.length !== two[i].labels.length)
return false;
}
return true;
}
matchPath(path, routes) {
if (!path || !routes)
return false;
if (path === '/')
return routes[path] ? path : null;
if (path[path.length - 1] === '/') {
path = path.substr(0, path.length - 1);
}
path = path.split('/');
if (path.length === 1)
return routes[path[0]] ? routes[path[0]] : null;
let keys = Object.keys(routes);
for (let i = 0; i < keys.length; i++) {
let route = keys[i];
let segments = route.split('/');
if (segments.length !== path.length)
continue;
for (let j = path.length - 1; j >= 0; j--) {
if (path[j] !== segments[j]) {
if (this.isIdentifier(path[j]) && segments[j] === '*' && path[j - 1] === segments[j - 1]) {
return segments.join('/');
}
else if (path[j - 1] !== undefined && path[j - 1] === segments[j - 1] && this.isIdentifier(path[j]) && this.isIdentifier(segments[j])) {
segments[j] = '*';
routes[segments.join('/')] = routes[route];
delete routes[keys[i]];
return segments.join('/');
}
else {
break;
}
}
if (j === 0)
return segments.join('/');
}
}
}
prepareAggregationforShipping() {
let routes = this.cache.routes;
const normalized = {
routes: [],
meta: {
trace_count: this.cache.meta.trace_count,
http_meter: Math.round(this.cache.meta.http_meter.rate(1000) * 100) / 100,
db_meter: Math.round(this.cache.meta.db_meter.rate(1000) * 100) / 100,
http_percentiles: {
median: this.cache.meta.histogram.percentiles([0.5])[0.5],
p95: this.cache.meta.histogram.percentiles([0.95])[0.95],
p99: this.cache.meta.histogram.percentiles([0.99])[0.99]
},
db_percentiles: {}
}
};
this.spanTypes.forEach((name) => {
let histogram = this.cache.meta.db_histograms[name];
if (!histogram)
return;
normalized.meta.db_percentiles[name] = histogram.percentiles([0.5])[0.5];
});
Object.keys(routes).forEach((path) => {
let data = routes[path];
if (!data.variances || data.variances.length === 0)
return;
const variances = data.variances.sort((a, b) => {
return b.count - a.count;
}).slice(0, 5);
let routeCopy = {
path: path === '/' ? '/' : '/' + path,
meta: {
min: data.meta.histogram.getMin(),
max: data.meta.histogram.getMax(),
count: data.meta.histogram.getCount(),
meter: Math.round(data.meta.meter.rate(1000) * 100) / 100,
median: data.meta.histogram.percentiles([0.5])[0.5],
p95: data.meta.histogram.percentiles([0.95])[0.95]
},
variances: []
};
variances.forEach((variance) => {
if (!variance.spans || variance.spans.length === 0)
return;
let tmp = {
spans: [],
count: variance.histogram.getCount(),
min: variance.histogram.getMin(),
max: variance.histogram.getMax(),
median: variance.histogram.percentiles([0.5])[0.5],
p95: variance.histogram.percentiles([0.95])[0.95]
};
variance.spans.forEach((oldSpan) => {
const span = fclone({
name: oldSpan.name,
labels: oldSpan.labels,
kind: oldSpan.kind,
startTime: oldSpan.startTime,
min: oldSpan.histogram ? oldSpan.histogram.getMin() : undefined,
max: oldSpan.histogram ? oldSpan.histogram.getMax() : undefined,
median: oldSpan.histogram ? oldSpan.histogram.percentiles([0.5])[0.5] : undefined
});
tmp.spans.push(span);
});
routeCopy.variances.push(tmp);
});
normalized.routes.push(routeCopy);
});
log(`sending formatted trace to remote endpoint`);
return normalized;
}
isIdentifier(id) {
id = typeof (id) !== 'string' ? id + '' : id;
if (id.match(/[0-9a-f]{8}-[0-9a-f]{4}-[14][0-9a-f]{3}-[0-9a-f]{4}-[0-9a-f]{12}|[0-9a-f]{12}[14][0-9a-f]{19}/i)) {
return true;
}
else if (id.match(/\d+/)) {
return true;
}
else if (id.match(/[0-9]+[a-z]+|[a-z]+[0-9]+/)) {
return true;
}
else if (id.match(/((?:[0-9a-zA-Z]+[@\-_.][0-9a-zA-Z]+|[0-9a-zA-Z]+[@\-_.]|[@\-_.][0-9a-zA-Z]+)+)/)) {
return true;
}
return false;
}
censorSpans(spans) {
if (!spans)
return log('spans is null');
spans.forEach((span) => {
if (!span.labels)
return;
delete span.labels.results;
delete span.labels.result;
delete span.spanId;
delete span.parentSpanId;
delete span.labels.values;
delete span.labels.stacktrace;
Object.keys(span.labels).forEach((key) => {
if (typeof (span.labels[key]) === 'string' && key !== 'stacktrace') {
span.labels[key] = span.labels[key].replace(this.privacyRegex, '\": \"?\"');
}
});
});
}
}
exports.TransactionAggregator = TransactionAggregator;
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