gistfile1.txt

var Domain = require('domain');
 
 
var Protect = function () {
 
    this._baseDomain = Domain.createDomain();                       // Envelope domain to force exit all nested inner domains
 
 this._baseDomain.on('error', function (err) {console.log('FLAIL', err);})
    this.domain = Domain.createDomain();
    this.domain.on('error', function (err) {
 
        console.log('protect: ' + err.message);
    });
};
 
 
Protect.prototype.run = function (next, setup) {          // setup: function (enter, exit)
 
    var self = this;
 
    var finish = function () {
        // Forces exit from this.domain along with any nested domains
        var ret = next();
        self._baseDomain.exit();
        return ret;
    };
 
    var protect = function (run) {
        self._baseDomain.enter();
        self.domain.enter();
        run();
    };
 
    setup(protect, finish);
};
 
 
var wrapped = function () {
 
    var protect = new Protect();
 
    var domain = Domain.createDomain();
    domain.once('error', function (err) {
 
        console.log('domain: ' + err.message);
    });
 
    var finish = function () {
 
        throw new Error('finish');
    };
 
    domain.run(function () {
 
        protect.run(finish, function (enter, exit) {
 
            enter(function () {
 
                setImmediate(function () {
 
                    exit();
                });
            });
        });
    });
};
 
 
var unwrapped = function () {
 
    var protect = new Protect();
 
    var finish = function () {
 
        throw new Error('finish');
    };
 
    protect.run(finish, function (enter, exit) {
 
        enter(function () {
 
            setImmediate(function () {
 
                exit();
            });
        });
    });
};
 
wrapped();
//unwrapped();