You can waterfall two waterfalls
function createWaterfall(commands) {
return function(callback) {
Async.waterfall(commands, callback);
}
}
var waterfalls = [createWaterfall(readCommands),
createWaterfall(writeCommands)];
Async.waterfall(waterfalls, function(err) {
//final result
});
Something like that
> On Dec 17, 2013, at 4:42 PM, Reza Razavipour <[email protected]>
> wrote:
>
> I have a set of read commands that I have to in sequence. Any fails,
> processing stops.
>
> readCommands is an array of read functions...
> async.waterfall(readCommands, function(err) {
> if (err) {
> console.log(err);
> res.send(500, { error : err.toString() });
> return;
> }
> else {
> console.log('we determined the state to which we have to
> rollback to');
> }
> });
>
> at this point, I know what I started with. Now I want to do the write commands
>
> async.waterfall(writeCommands, function(err) {
> if (err) {
> console.log(err);
> res.send(500, { error : err.toString() });
> return;
> }
> else {
> console.log('we succeeded with all the write commands...');
> }
> });
>
> the arrays readCommands and writeCommands entries are radically different so
> very hard to combine them. But I DO for the first waterfall to finish before
> I go to the next one.
> How do I make a "waterfall" out of the existing two?
>
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