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//
// ============LICENSE_START=======================================================
//  Copyright (C) 2016-2018 Ericsson. All rights reserved.
// ================================================================================
// This file is licensed under the CREATIVE COMMONS ATTRIBUTION 4.0 INTERNATIONAL LICENSE
// Full license text at https://creativecommons.org/licenses/by/4.0/legalcode
// 
// SPDX-License-Identifier: CC-BY-4.0
// ============LICENSE_END=========================================================
//
// @author Sven van der Meer (sven.van.der.meer@ericsson.com)
//

== Flexible Deployment

APEX can be deployed in various ways.
The following figure shows a few of these deployment options.
Engine and (policy) executors are named UPe (universal policy engine, APEX engine) and UPx (universal policy executor, the APEX internal state machine executor).

.APEX Deployment Options
image::apex-intro/UpeeDeploymentOptions.png[APEX Deployment Options]

[loweralpha]
. For an interface or class
	* Either UPx or UPe as association
. For an application
	* UPx as object for single policies
	* UPe as object for multiple policies
. For a component (as service)
	* UPe as service for requests
	* UPec as service for requests
. As a service (PolaS)
	* One or more UPe with service i/f
	* One or more Upec/UPec with service i/f
	* One or more Upec/UPec with service i/f
. In a control loop
	* UPe as decision making part
	* UPec as decision making part
. On cloud compute nodes
	* Nodes with only UPe or Upec
	* Nodes with any combination of UPe, UPec
. A cloud example
	* Left: 2 UPec managing several UPe on different cloud nodes
	* Right: 2 large UPec with different UPe/UPec deployments