/
queries.go
85 lines (76 loc) · 2.55 KB
/
queries.go
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// Copyright 2018 Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// 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 config
// GetInstancesGroupedByHandlers queries the snapshot and returns all used instances, grouped by the handlers that will
// receive them.
func GetInstancesGroupedByHandlers(s *Snapshot) map[*HandlerStatic][]*InstanceStatic {
// There is no set in Go? map[<item>]bool to the rescue!
m := make(map[*HandlerStatic]map[*InstanceStatic]bool)
// Grovel over rules/actions and for each handler create a map entry and place all the instances in that action
// as values.
for _, r := range s.Rules {
for _, a := range r.ActionsStatic {
instances, found := m[a.Handler]
if !found {
instances = make(map[*InstanceStatic]bool)
m[a.Handler] = instances
}
for _, i := range a.Instances {
instances[i] = true
}
}
}
result := make(map[*HandlerStatic][]*InstanceStatic, len(m))
for k, v := range m {
i := 0
instances := make([]*InstanceStatic, len(v))
for instance := range v {
instances[i] = instance
i++
}
result[k] = instances
}
return result
}
// GetInstancesGroupedByHandlersDynamic queries the snapshot and returns all used instances, grouped by the handlers that will
// receive them.
func GetInstancesGroupedByHandlersDynamic(s *Snapshot) map[*HandlerDynamic][]*InstanceDynamic {
// There is no set in Go? map[<item>]bool to the rescue!
m := make(map[*HandlerDynamic]map[*InstanceDynamic]bool)
// Grovel over rules/actions and for each handler create a map entry and place all the instances in that action
// as values.
for _, r := range s.Rules {
for _, a := range r.ActionsDynamic {
instances, found := m[a.Handler]
if !found {
instances = make(map[*InstanceDynamic]bool)
m[a.Handler] = instances
}
for _, i := range a.Instances {
instances[i] = true
}
}
}
result := make(map[*HandlerDynamic][]*InstanceDynamic, len(m))
for k, v := range m {
i := 0
instances := make([]*InstanceDynamic, len(v))
for instance := range v {
instances[i] = instance
i++
}
result[k] = instances
}
return result
}