Zend Framework 3 integration

ZEUS for PHP is highly integrated with _Zend Framework 3_ (ZF3) services such as ServiceManager and EventManager. Thus, most of ZEUS components and classes are declared as ZF3 services and service factories.

Any custom integration with ZEUS should therefore be performed through ZF3 Service Manager and its configuration.

ZEUS layers

ZEUS Runtime Environment consists of two layers: user and kernel:

Kernel Mode

This is a low level set of features needed to implement any multi-tasking service.

Kernel consists of the following components: Process Scheduler and its Processes.

User Mode

This is a higher-level ZEUS layer which provides specific services implementation by using the low level Kernel functionality.

It contains the following components: Event logger, Server Service Manager and its Server Services.

Event driven lifecycle

ZEUS for PHP incorporates and utilizes a custom Zend event implementation - Zeus\Kernel\ProcessManager\SchedulerEvent throughout its entire life-cycle process.

Access to this event is public and can be used to fully customize ZEUS for PHP behaviour.

_By default, the following ZEUS event flow is in effect (events are colored yellow and light-blue):_

Both Scheduler and Process instances are isolated from each other and can share their data only through the _Inter-Process Communication_ messages. The same applies to ZEUS events: Scheduler events (yellow color) can't be intercepted by the Process instances, as well as Process events (light-blue) by a Scheduler instance.