stream-pipeline
v0.0.4
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Efficient way of connecting disparate streams
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pipeline
Efficient way of connecting disparate streams
When you want to connect several disparate pipes in a configuration driven way use this tool. Disparate here means pipes that at the end should buffer completely.
a => b => c wait for c to end then c => d => e wait for e to end then e => f => g
How to.
Create a config and pass it in to pipline.
var pipeline = new Pipeline(
[
{
pipes: [
through(function(d) {
d.newData = 1;//Math.random();
this.queue(d);
}),
JSONStream.stringify(),
]
},
{
pipes: [
JSONStream.parse(),
JSONStream.stringify()
]
},
{
pipes: [
JSONStream.parse()
]
}
]
);
Pipeline exposes the 'in' stream and 'out' stream through two properties.
process.stdout.pipe(pipeline.out);
pipeline.in.write("hello");
The above will break because pipeline.out in the above example is objects. but add in another JSONStream.stringify and you will have a working pipeline.
Pipelines are executed in the array order they are provided.
Please look at the Test file for examples.