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Example code of trkisf2/remote-collection-stream

Informations about the package remote-collection-stream

Description

Continuously streams remote collection in user defined chunks and yields them using Generators.

Usage

Use case, implementation example

Let's say we want to fully stream a bigger MySQL table (few million rows) into a messanging queue in chunks without crushing due to memory limits.

ChunksProvider looks like:

And $this->campaigns is a simple Repository fetching data from MySQL using $offset, $limit. Chunk object is just a custom DTO.

Or it could be a dummy in memory collection

Few last words about the implementation

The Stream objects fetches new collections using callable which is a bit loose as I can't enforce the callable arguments with an interface and even though it makes me feel as a JS developer, it gives the implementation side a nice advantage + there is a validation in place verifying the number of arguments passed.

The ability to combine the call with own parameters:

If Stream object would require some kind of "CollectionRepository" in the constructor then you would have to use setters, nullable attributes and other evil things in the repository in order to use additional arguments like filters in the query etc.

Tests included.

All versions of remote-collection-stream with dependencies

PHP Build Version
Package Version
Requires php Version >=7.1
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