Cloned from launchpad blueprint https://blueprints.launchpad.net/horizon/+spec/ceilometer-api-enhancements.

Description:

API in horizon for ceilometer

- Class wrappers of each Ceilometer entity
- Function wrappers for ceilometer queries

- High level wrappers for important table statistics and time series data, for Resources and Resource Aggregates (containing multiple resources)

- Optimization of high level wrappers:
1. Multithreading ( will get eventually replaced by Ceilometer API optimizations below )
2. Implementing Group-by ( https://blueprints.launchpad.net/ceilometer/+spec/api-group-by )
3. Removing the constraint, that there have to be only one meter per statistic request. (https://blueprints.launchpad.net/ceilometer/+spec/sample-api)
- there will have to be probably a separate Group By for sample api (should be implicitly part of 3)
- there will probably have to be a Group By by metadata, if meter name will be stored in metadata (https://wiki.openstack.org/wiki/Ceilometer/blueprints/multi-dimensions, should be implicitly part of 3)
4. Ordering and limit of statistics, eg. top5 cpu consumers (https://blueprints.launchpad.net/ceilometer/+spec/statistics-order-by-and-limit-for-grouped-query)


Specification URL (additional information):

None