In order to get the correlation between different alarms with the help of the topological information provided by A&AI. Holmes needs to call the A&AI APIs. Generally, we have to query the information of VNFs, VMs and the corresponding relation between resources from different layers. The following APIs are invoked by Holmes.
#. Query a VNF by name:
+
``/aai/v11/network/generic-vnfs/generic-vnf?vnf-name={vnf-name}``
#. Query a VNF by ID:
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``/aai/v11/network/generic-vnfs/generic-vnf?vnf-id={vnf-id}``
#. Query a VM by name:
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``/aai/v11/search/nodes-query?search-node-type=vserver&filter=vserver-name:EQUALS:{vserver-name}``
#. Query a VM by ID:
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``/aai/v11/search/nodes-query?search-node-type=vserver&filter=vserver-id:EQUALS:{vserver-id}``
More details could be found at `A&AI APIs <https://wiki.onap.org/pages/viewpage.action?pageId=13598793>`_.
Holmes fetches VES data from DMaaP and publishes the control loop event back to DMaaP. The related APIs are:
#. Subscribing:
- ``events/{topic}/{consumergroup}/{consumerid}``
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+ ``/events/{topic}/{consumergroup}/{consumerid}``
#. Publishing:
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``/events/{topic}``
More details could be found at `DMaaP APIs <https://wiki.onap.org/display/DW/DMaaP+API>`_.