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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,201 +1,31 @@ | ||
| const ReflectApply = Reflect.apply; | ||
| const PromiseReject = Promise.reject; | ||
| const PromiseResolve = Promise.resolve; | ||
| const PromisePrototypeThen = Promise.prototype.then; | ||
| const ArrayPrototypeSplice = Array.prototype.splice; | ||
|
|
||
| const { ERR_INVALID_ARG_TYPE } = require('./errors.js'); | ||
| const checks = require('./checks.js'); | ||
|
|
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| if (checks.hasFullSupport()) { | ||
| module.exports = require('node:diagnostics_channel'); | ||
| return | ||
| return; | ||
| } | ||
|
|
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| // TODO: everything else | ||
|
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| let dc; | ||
| let channel_registry; | ||
| // TODO: global symbol channel registry when building from scratch | ||
|
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| if (checks.providesDiagnosticsChannel()) { | ||
| dc = require('diagnostics_channel'); | ||
| } else { | ||
| // TODO | ||
| channel_registry = Symbol.for('dc-polyfill'); | ||
| dc = require('./reimplementation.js'); | ||
| } | ||
| const dc = checks.hasDiagnosticsChannel() | ||
| ? require('diagnostics_channel') | ||
| : require('./reimplementation.js'); | ||
|
|
||
| if (checks.hasZeroSubscribersBug()) { | ||
| require('./patch-zero-subscriber-bug.js')(dc); | ||
| } | ||
|
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| if (!checks.providesTopSubscribeUnsubscribe()) { | ||
| dc.subscribe = (channel, cb) => { | ||
| return dc.channel(channel).subscribe(cb); | ||
| }; | ||
| dc.unsubscribe = (channel, cb) => { | ||
| if (dc.channel(channel).hasSubscribers) { | ||
| return dc.channel(channel).unsubscribe(cb); | ||
| } | ||
| }; | ||
| if (!checks.hasTopSubscribeUnsubscribe()) { | ||
| require('./patch-top-subscribe-unsubscribe.js')(dc); | ||
| } | ||
|
|
||
| if (!checks.providesTracingChannel()) { | ||
| dc.tracingChannel = tracingChannel; | ||
| if (!checks.hasChUnsubscribeReturn()) { | ||
| require('./patch-channel-unsubscribe-return.js')(dc); | ||
| } | ||
|
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| module.exports = dc; | ||
|
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| class TracingChannel { | ||
| constructor(nameOrChannels) { | ||
| if (typeof nameOrChannels === 'string') { | ||
| this.start = channel(`tracing:${nameOrChannels}:start`); | ||
| this.end = channel(`tracing:${nameOrChannels}:end`); | ||
| this.asyncStart = channel(`tracing:${nameOrChannels}:asyncStart`); | ||
| this.asyncEnd = channel(`tracing:${nameOrChannels}:asyncEnd`); | ||
| this.error = channel(`tracing:${nameOrChannels}:error`); | ||
| } else if (typeof nameOrChannels === 'object') { | ||
| const { start, end, asyncStart, asyncEnd, error } = nameOrChannels; | ||
|
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| // assertChannel(start, 'nameOrChannels.start'); | ||
| // assertChannel(end, 'nameOrChannels.end'); | ||
| // assertChannel(asyncStart, 'nameOrChannels.asyncStart'); | ||
| // assertChannel(asyncEnd, 'nameOrChannels.asyncEnd'); | ||
| // assertChannel(error, 'nameOrChannels.error'); | ||
|
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| this.start = start; | ||
| this.end = end; | ||
| this.asyncStart = asyncStart; | ||
| this.asyncEnd = asyncEnd; | ||
| this.error = error; | ||
| } else { | ||
| throw new ERR_INVALID_ARG_TYPE('nameOrChannels', | ||
| ['string', 'object', 'Channel'], | ||
| nameOrChannels); | ||
| } | ||
| } | ||
|
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| subscribe(handlers) { | ||
| for (const name of traceEvents) { | ||
| if (!handlers[name]) continue; | ||
|
|
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| if (this[name]) this[name].subscribe(handlers[name]); | ||
| } | ||
| } | ||
|
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| unsubscribe(handlers) { | ||
| let done = true; | ||
|
|
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| for (const name of traceEvents) { | ||
| if (!handlers[name]) continue; | ||
|
|
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| if (!(this[name] && this[name].unsubscribe(handlers[name]))) { | ||
| done = false; | ||
| } | ||
| } | ||
|
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| return done; | ||
| } | ||
|
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| traceSync(fn, context = {}, thisArg, ...args) { | ||
| const { start, end, error } = this; | ||
|
|
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| return start.runStores(context, () => { | ||
| try { | ||
| const result = ReflectApply(fn, thisArg, args); | ||
| context.result = result; | ||
| return result; | ||
| } catch (err) { | ||
| context.error = err; | ||
| error.publish(context); | ||
| throw err; | ||
| } finally { | ||
| end.publish(context); | ||
| } | ||
| }); | ||
| } | ||
|
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| tracePromise(fn, context = {}, thisArg, ...args) { | ||
| const { start, end, asyncStart, asyncEnd, error } = this; | ||
|
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| function reject(err) { | ||
| context.error = err; | ||
| error.publish(context); | ||
| asyncStart.publish(context); | ||
| // TODO: Is there a way to have asyncEnd _after_ the continuation? | ||
| asyncEnd.publish(context); | ||
| return PromiseReject(err); | ||
| } | ||
|
|
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| function resolve(result) { | ||
| context.result = result; | ||
| asyncStart.publish(context); | ||
| // TODO: Is there a way to have asyncEnd _after_ the continuation? | ||
| asyncEnd.publish(context); | ||
| return result; | ||
| } | ||
|
|
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| return start.runStores(context, () => { | ||
| try { | ||
| let promise = ReflectApply(fn, thisArg, args); | ||
| // Convert thenables to native promises | ||
| if (!(promise instanceof Promise)) { | ||
| promise = PromiseResolve(promise); | ||
| } | ||
| return PromisePrototypeThen(promise, resolve, reject); | ||
| } catch (err) { | ||
| context.error = err; | ||
| error.publish(context); | ||
| throw err; | ||
| } finally { | ||
| end.publish(context); | ||
| } | ||
| }); | ||
| } | ||
|
|
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| traceCallback(fn, position = -1, context = {}, thisArg, ...args) { | ||
| const { start, end, asyncStart, asyncEnd, error } = this; | ||
|
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| function wrappedCallback(err, res) { | ||
| if (err) { | ||
| context.error = err; | ||
| error.publish(context); | ||
| } else { | ||
| context.result = res; | ||
| } | ||
|
|
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| // Using runStores here enables manual context failure recovery | ||
| asyncStart.runStores(context, () => { | ||
| try { | ||
| if (callback) { | ||
| return ReflectApply(callback, this, arguments); | ||
| } | ||
| } finally { | ||
| asyncEnd.publish(context); | ||
| } | ||
| }); | ||
| } | ||
|
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| const callback = ArrayPrototypeAt(args, position); | ||
| if (typeof callback !== 'function') { | ||
| throw new ERR_INVALID_ARG_TYPE('callback', ['function'], callback); | ||
| } | ||
| ArrayPrototypeSplice(args, position, 1, wrappedCallback); | ||
|
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| return start.runStores(context, () => { | ||
| try { | ||
| return ReflectApply(fn, thisArg, args); | ||
| } catch (err) { | ||
| context.error = err; | ||
| error.publish(context); | ||
| throw err; | ||
| } finally { | ||
| end.publish(context); | ||
| } | ||
| }); | ||
| } | ||
| if (!checks.hasTracingChannel()) { | ||
| require('./patch-tracing-channel.js')(dc); | ||
| } | ||
|
|
||
| function tracingChannel(nameOrChannels) { | ||
| return new TracingChannel(nameOrChannels); | ||
| } | ||
| module.exports = dc; | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| // @see https://github.com/nodejs/node/pull/40433 | ||
| module.exports = function (dc) { | ||
| // TODO | ||
| }; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| module.exports = function (dc) { | ||
| dc.subscribe = (channel, cb) => { | ||
| return dc.channel(channel).subscribe(cb); | ||
| }; | ||
| dc.unsubscribe = (channel, cb) => { | ||
| if (dc.channel(channel).hasSubscribers) { | ||
| return dc.channel(channel).unsubscribe(cb); | ||
| } | ||
| }; | ||
| }; |
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