Introduction to Multistream

Multistream is a powerful tool for streaming data from multiple sources seamlessly. This guide will introduce you to the core concepts of multistream and provide dozens of useful API examples to help you get started. Let’s dive in!

Creating a Basic Multistream

The simplest way to create a multistream is to use the basic createMultistream function. Here’s an example:

  const { createMultistream } = require('multistream-library'); const stream1 = getStreamFromSource1(); const stream2 = getStreamFromSource2(); const combinedStream = createMultistream([stream1, stream2]);  

Handling Data Events

Once you have created a multistream, you can handle data events like this:

  combinedStream.on('data', (chunk) => {
    console.log('Received chunk:', chunk);
});  

Handling Errors

To handle errors from any of the streams, attach an error listener:

  combinedStream.on('error', (error) => {
    console.error('Stream error:', error);
});  

Ending the Stream

To end the multistream, simply call the end method:

  combinedStream.end();  

Combining More Streams

You can combine more than two streams. Here is an example of combining four streams:

  const stream3 = getStreamFromSource3(); const stream4 = getStreamFromSource4(); const multiStream = createMultistream([stream1, stream2, stream3, stream4]);  

App Example Using Multistream APIs

Here is a complete example of an app that uses the Multistream APIs to read from multiple sources and log the data:

  const { createMultistream } = require('multistream-library');
function getStreamFromSource1() {
    // implementation details...
}
function getStreamFromSource2() {
    // implementation details...
}
function getStreamFromSource3() {
    // implementation details...
}
function getStreamFromSource4() {
    // implementation details...
}
const stream1 = getStreamFromSource1(); const stream2 = getStreamFromSource2(); const stream3 = getStreamFromSource3(); const stream4 = getStreamFromSource4();
const combinedStream = createMultistream([stream1, stream2, stream3, stream4]);
combinedStream.on('data', (chunk) => {
    console.log('Received chunk:', chunk);
});
combinedStream.on('error', (error) => {
    console.error('Stream error:', error);
});
combinedStream.on('end', () => {
    console.log('Stream ended');
});
combinedStream.end();  

With these APIs, you can effectively manage and handle multiple streams in your application, making data processing much easier and more efficient.

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