Details
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Type: extRequest
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Status: Closed
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Priority: Major
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Resolution: Done
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Fix Version/s: 2021
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Component/s: FIWARE-TECH-HELP
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Labels:None
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HD-Chapter:Apps
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HD-Enabler:Wirecloud
Description
Hi,
I'm trying to use the 'ngsi-source-operator' to fetch data from 'Orion context broker' and trying to populate that data on the Map Widget.
My Orion instance is running @ http://130.206.117.237:1026 and I'm using the global instance of wirecloud.
Please suggest me, what setting should I use for NGSI-source-operator in order to fetch data.
Also while creating subscriptions, which URL should I use to send the notifications.
Another query is regarding Table Viewer widget, as it requires input points as 'Data and Structures', is there any available operator to fetch or create a dataset for this table viewer widget.
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Prashant Chauhan
Software Engineer
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Mobile : +919582019151
PC00474884@techmahindra.com<PC00474884@techmahindra.com>
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[Created via e-mail received from: Prashant Chauhan1 <PC00474884@TechMahindra.com>]
Activity
Hi Prashant,
That operator does require 2 general configs regarding URLs of the CB:
- URL of the Context Broker, that would be the one you indicate
http://130.206.117.237:1026 - URL of a proxy (so as to receive asynchronous notifications for
subscriptions), that you can leave by default on a global instance running
at https://ngsiproxy.lab.fiware.org or deploying your own one.
Besides this information, some other configs are required to address
specific information. You can indicate an ID pattern or a query, or you can
simply indicate the type of the desired entities, plus the FIWARE service
(tenant) required for accessing them, and the FIWARE service path where
that entities have been uploaded inside the CB. In case you want
subscriptions (through the proxy), and not only an initial query, you have
to indicate, coma sepparated, the list of attributes whose change would
fire a new asinchronous notifications (a new entity with that attributes
does also fires this).
And appart from that, you would want to consume the information. Operators
Entity 2 PoI (generic, does require a setting to indicate the attribute to
search for location information and an icon) or FIWARE data model 2 PoI
(based on FIWARE data models, fully automatic handling dozens of different
icons) does generate points of interest so as to easily be imported in a
map (Open Layers map is simpler since it does not require google api kkey).
You can download and analyze their code, in case you want to learn how to
handle notification events, but they are simply json objects with the data
(full query or individual objects).
Let me get more detailed information on the Table Viewer widget, since I've
not used it for long. I'll will come with further details.
Best regards,
───────────────────────────
Miguel Jiménez Gañán, PhD.
Dpto. Lenguajes y Sistemas Informáticos e Ingeniería de Software
Escuela Técnica Superior de Ingenieros Informáticos
Universidad Politécnica de Madrid (UPM)
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On Mon, May 14, 2018 at 12:18 PM, Prashant Chauhan1 <
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Hi Prashant,
Regarding Data Table Viewer Widget, we have not connected directly to NGSI
data, but to CKAN data (using CKAN Resource Selector
<https://github.com/wirecloud-fiware/ckan-resource-selector-widget> widget,
for example). Regarding NGSI it would require an operator generating the
data set structure as defined in Data Table Viewer documentarion
<https://github.com/Wirecloud/data-table-viewer-widget/blob/master/src/doc/userguide.md>
.
Best regards,
───────────────────────────
Miguel Jiménez Gañán, PhD.
Dpto. Lenguajes y Sistemas Informáticos e Ingeniería de Software
Escuela Técnica Superior de Ingenieros Informáticos
Universidad Politécnica de Madrid (UPM)
───────────────────────────
On Sun, May 20, 2018 at 7:37 AM, Prashant Chauhan1 <
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