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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| /******************************************************************************* | ||
| * | ||
| * Copyright 2023 SAP SE | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You should have received a copy of the License along with this | ||
| * program. If not, you may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| *******************************************************************************/ | ||
|
|
||
| package core | ||
|
|
||
| import ( | ||
| "slices" | ||
| "sort" | ||
| ) | ||
|
|
||
| // Topological is a container for data that can either be reported for | ||
| // the entire region at once, or separately by AZ. | ||
| // Exactly one field shall be non-nil. | ||
| type Topological[D TopologicalData[D]] struct { | ||
| Regional *D | ||
| PerAZ map[string]*D | ||
| } | ||
|
|
||
| // Regional is a shorthand to construct a Topological instance with the Regional member filled. | ||
| func Regional[D TopologicalData[D]](data D) Topological[D] { | ||
| return Topological[D]{Regional: &data} | ||
| } | ||
|
|
||
| // PerAZ is a shorthand to construct a Topological instance with the PerAZ member filled. | ||
| func PerAZ[D TopologicalData[D]](data map[string]*D) Topological[D] { | ||
| return Topological[D]{PerAZ: data} | ||
| } | ||
|
|
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| // Sum returns a sum of all data in this container. | ||
| // If the Regional field is filled, that data is returned directly. | ||
| // Otherwise, all entries in the PerAZ field are summed together. | ||
| func (t Topological[D]) Sum() D { | ||
| if t.PerAZ == nil { | ||
| return *t.Regional | ||
| } | ||
|
|
||
| //fold AZ data in a well-defined order for deterministic test result | ||
| azNames := make([]string, 0, len(t.PerAZ)) | ||
| for az := range t.PerAZ { | ||
| azNames = append(azNames, az) | ||
| } | ||
| sort.Strings(azNames) | ||
|
|
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| var result D | ||
| for _, az := range azNames { | ||
| result = result.add(*t.PerAZ[az]) | ||
| } | ||
| return result | ||
| } | ||
|
|
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| // TopologicalData is an interfaces for types that can be put into the Topological container. | ||
| type TopologicalData[Self any] interface { | ||
| // List of permitted types. This is required for type inference, as explained here: | ||
| // <https://stackoverflow.com/a/73851453> | ||
| UsageData | CapacityData | ||
|
|
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| // Computes the sum of this structure and `other`. | ||
| // This is used to implement Topological.Sum(). | ||
| add(other Self) Self | ||
| } | ||
|
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| // ResourceData contains quota and usage data for a single project resource. | ||
| type ResourceData struct { | ||
| Quota int64 //negative values indicate infinite quota | ||
| UsageData Topological[UsageData] | ||
| } | ||
|
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| // UsageData contains usage data for a single project resource. | ||
| // It appears in type ResourceData. | ||
| type UsageData struct { | ||
| Usage uint64 | ||
| PhysicalUsage *uint64 //only supported by some plugins | ||
| Subresources []any //only if supported by plugin and enabled in config | ||
| } | ||
|
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| // add implements the TopologicalData interface. | ||
| // | ||
| //nolint:unused // looks like a linter bug | ||
| func (d UsageData) add(other UsageData) UsageData { | ||
| result := UsageData{ | ||
| Usage: d.Usage + other.Usage, | ||
| Subresources: append(slices.Clone(d.Subresources), other.Subresources...), | ||
| } | ||
|
|
||
| //the sum can only have a PhysicalUsage value if both sides have it | ||
| if d.PhysicalUsage != nil && other.PhysicalUsage != nil { | ||
| physUsage := *d.PhysicalUsage + *other.PhysicalUsage | ||
| result.PhysicalUsage = &physUsage | ||
| } | ||
|
|
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| return result | ||
| } | ||
|
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| // CapacityData contains capacity data for a single project resource. | ||
| type CapacityData struct { | ||
| Capacity uint64 | ||
| Usage uint64 //NOTE: currently only relevant on AZ level, regional level uses the aggregation of project usages | ||
| Subcapacities []any //only if supported by plugin and enabled in config | ||
| } | ||
|
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| // add implements the TopologicalData interface. | ||
| // | ||
| //nolint:unused // looks like a linter bug | ||
| func (d CapacityData) add(other CapacityData) CapacityData { | ||
| return CapacityData{ | ||
| Capacity: d.Capacity + other.Capacity, | ||
| Usage: d.Usage + other.Usage, | ||
| Subcapacities: append(slices.Clone(d.Subcapacities), other.Subcapacities...), | ||
| } | ||
| } |
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