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.. This work is licensed under a Creative Commons Attribution 4.0 International License.
.. http://creativecommons.org/licenses/by/4.0
.. Copyright (C) 2021 Pantheon.tech
.. Copyright (C) 2024 TechMahindra Ltd.
.. _cpsDeltaEndpoints:
.. toctree::
:maxdepth: 1
CPS Delta Endpoints
###################
The CPS Delta feature provides 1 endpoint:
- /v2/dataspaces/{dataspace-name}/anchors/{anchor-name}/delta
Description
-----------
The following is a Get endpoint, which allows the user to find the delta between configurations stored under two anchors within the same dataspace.
Path Parameters
---------------
The endpoint takes 2 path parameters as input:
- **dataspace-name:** name of dataspace where the 2 anchors to be used for delta generation are stored.
- **anchor-name:** the source anchor name, the data under this anchor will be the reference data for delta report generation
Query Parameters
----------------
The endpoint takes 3 query parameters as input:
- **target-anchor-name:** the data retrieved from target anchor gets compared against the data retrieved from source anchor
- **xpath:** the xpath to a particular data node, Example: /bookstore/categories[@code='1']
- **descendants:** specifies the number of descendants to query.
Sample Delta Report
-------------------
.. code-block:: json
[
{
"action": "create",
"xpath": "/bookstore/categories/[@code=3]",
"target-data": {
"code": "3,",
"name": "kidz"
}
},
{
"action": "remove",
"xpath": "/bookstore/categories/[@code=1]",
"source-data": {
"code": "1,",
"name": "Fiction"
}
},
{
"action": "replace",
"xpath": "/bookstore/categories/[@code=2]",
"source-data": {
"name": "Funny"
},
"target-data": {
"name": "Comic"
}
}
]
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