I'm currently using a class Block from 'control-block' package (
https://github.com/AlexeyKupershtokh/control-block or npm install
control-block).
This module allows to do almost the same as domains. And it supports
nesting of blocks. Throwing an error in nested block's error handler will
route the error to parent's block error handler.
Though I should admit that I haven't tested it under really heavy load so
it's possible it has some memory leaks.
пятница, 13 июля 2012 г., 4:45:05 UTC+7 пользователь Mike Schilling написал:
>
> I wrote a simple test of nested domains which looks like this:
>
> var topDomain = domain.create();
> var subDomain = domain.create();
> topDomain.add(subDomain);
>
> topDomain.on("error", function(err) {
> console.log("Top saw an error: " + err.message);
> });
>
> subDomain.on("error", function(err) {
> console.log("Sub saw an error: " + err.message);
>
> throw new Error("bar")
> });
>
> topDomain.run( function() {
> subDomain.run(function() {
> throw new Error("foo");
> });
> });
>
> What I was expecting to happen is
>
> 1. subDomain catches the first error (foo) and prints a message
> 2. Since subDomain is a member of topDomain, topDomain catches the
> second error (bar), which is thrown from a subDomain event. Now topDomain
> prints out a message.
> 3. Done
> 4. That is, the output should look like:
>
> Sub saw an error: foo
>
> Top saw an error: bar
>
>
> That's what happens when I run node under the IntelliJ debugger (no
> breakpoints set, just run it to completion.) But if I run node without
> the debugger, either under IntelliJ or directly from the command line, the
> output is
>
>
> Sub saw an error: foo
>
>
> /Users/mike/Documents/workspace-sts-2.9.0.RELEASE/mms/src/js/scripts/testDomains.js:107
>
> throw new Error("bar")
>
> ^
>
> Error: bar
>
> at Domain.<anonymous>
> (/Users/mike/Documents/workspace-sts-2.9.0.RELEASE/mms/src/js/scripts/testDomains.js:107:11)
>
> at Domain.EventEmitter.emit (events.js:88:17)
>
> at process.uncaughtHandler (domain.js:60:20)
>
> at process.EventEmitter.emit (events.js:115:20)
>
>
> That is, the first error is caught but not the second one. This
> is v0.8.1 on Mac.
>
>
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