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Example code of joshdifabio/resource-pool

Informations about the package resource-pool

Resource Pool

Build Status Coverage Code Quality

Don't pwn your resources, pool them!

Introduction

Resource pools allow you to regulate the concurrency level of your asynchronous PHP components and spare your servers from excessive load. You'll find them particularly useful if your application sends HTTP requests or spawns child processes using something like ReactPHP.

Basic usage

If you aren't familiar with Promises, this section isn't going to make a lot of sense.

Consider an application which sends HTTP requests to a remote endpoint asynchronously.

How you shouldn't do it

An implementation like this could easily send 100s or even 1000s of requests within a single second, causing huge load on the remote server as it tries to serve your requests. This is essentially a DoS attack, and will make sysadmins cry, who will then make you cry.

How you should do it

Create a resource pool representing a fixed number of resources, for example five.

Before sending a request, allocate a resource from the pool. Pool::allocateOne() returns an AllocationPromise which resolves as soon as a resource becomes available.

That's it! You did it! This implementation will spawn a maximum of five concurrent requests.

Advanced usage

Advanced user? Read on.

Allocate multiple resources

Allocate all the resources

Release allocations manually

Force an allocation to resolve immediately

You can also choose to burst beyond the size of the pool for a specific allocation.

Find out when a pool is idle

Change the size of a pool

Find out how many resources are allocated

Find out how many resources are available

Installation

Install Resource Pool using composer.

License

Resource Pool is released under the MIT license.

All versions of resource-pool with dependencies

PHP Build Version
Package Version
Requires php Version >=5.4
react/promise Version ^2.0
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