workflow-4-node/lib/es5/activities/cancellationScope.js

Workflow 4 Node is a .NET Workflow Foundation like framework for Node.js. The goal is to reach feature equivalence and beyond.

"use strict";

var Activity = require("./activity");
var util = require("util");
var errors = require("../common/errors");
var Block = require("./block");

function CancellationScope() {
    Activity.call(this);

    this.cancelled = null;
    this.arrayProperties.add("cancelled");
}

util.inherits(CancellationScope, Activity);

CancellationScope.prototype.initializeStructure = function () {
    this._body = new Block();
    this._body.args = this.args;
    this.args = null;
    if (this.cancelled) {
        var prev = this.cancelled;
        this.cancelled = new Block();
        this.cancelled.args = prev;
    }
};

CancellationScope.prototype.run = function (callContext, args) {
    callContext.schedule(this._body, "_bodyFinished");
};

CancellationScope.prototype._bodyFinished = function (callContext, reason, result) {
    if (this.cancelled && (reason === Activity.states.cancel || reason === Activity.states.fail && result instanceof errors.Cancelled)) {
        callContext.schedule(this.cancelled);
    } else {
        callContext.end(reason, result);
    }
};

module.exports = CancellationScope;
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