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In this tutorial we are going to use commands from "resources" and "protocols" namespaces.
OpenNaaS concepts
OpenNaaS is a framework which is based on the OSGi technology. OSGi consists of a set of components (named bundles) which provide required logic. OpenNaaS includes many bundles providing resources and capabilities abstraction (see System Architecture section). When running OpenNaaS (see Getting started section), all its bundles are loaded and exported functionality is available through the command line.
Creating resources
First step in OpenNaaS is registering existing infrastructure. For this tutorial, there is a single router device to be registered.
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Note: For this guide, we used a router descriptor, specifying junos20 as name.
Registering protocol contexts
Each resource can use many different protocols to communicate with the physical device it represents. Required protocols are determined by the driver in use. For a resource to be able to use a required protocol, a Protocol Context is needed. Protocol Context stores all required information to communicate with the device using a protocol known to OpenNaaS.
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Notice that only one context per protocol type is registered in a resource. Last one lasts.
Starting resources
A resource will populate its model and enable all its capabilities when started. Hence, in order to operate with it using opennaas, it must be started.
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| Code Block |
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resource:start router:junos20 |
Doing operations with resources
A resource includes a set of capabilities or features. These capabilities determine the set of available operations for this resource.
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Please, remember that capabilities to load for a particular resource are specified in the resource descriptor.
Removing resources
Finally, if the resource isn't needed anymore, it can be stopped and removed. First, we stop it:
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