| // Copyright 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 model |
| |
| import ( |
| "sync" |
| ) |
| |
| import ( |
| "github.com/apache/dubbo-go-pixiu/pkg/cluster" |
| ) |
| |
| // AddressMap provides a thread-safe mapping of addresses for each Kubernetes cluster. |
| type AddressMap struct { |
| // Addresses hold the underlying map. Most code should only access this through the available methods. |
| // Should only be used by tests and construction/initialization logic, where there is no concern |
| // for race conditions. |
| Addresses map[cluster.ID][]string |
| |
| // NOTE: The copystructure library is not able to copy unexported fields, so the mutex will not be copied. |
| mutex sync.RWMutex |
| } |
| |
| func (m *AddressMap) IsEmpty() bool { |
| if m == nil { |
| return true |
| } |
| m.mutex.RLock() |
| defer m.mutex.RUnlock() |
| |
| return len(m.Addresses) == 0 |
| } |
| |
| func (m *AddressMap) DeepCopy() AddressMap { |
| return AddressMap{ |
| Addresses: m.GetAddresses(), |
| } |
| } |
| |
| // GetAddresses returns the mapping of clusters to addresses. |
| func (m *AddressMap) GetAddresses() map[cluster.ID][]string { |
| if m == nil { |
| return nil |
| } |
| |
| m.mutex.RLock() |
| defer m.mutex.RUnlock() |
| |
| if m.Addresses == nil { |
| return nil |
| } |
| |
| out := make(map[cluster.ID][]string) |
| for k, v := range m.Addresses { |
| if v == nil { |
| out[k] = nil |
| } else { |
| out[k] = append([]string{}, v...) |
| } |
| } |
| return out |
| } |
| |
| // SetAddresses sets the addresses per cluster. |
| func (m *AddressMap) SetAddresses(addrs map[cluster.ID][]string) { |
| if len(addrs) == 0 { |
| addrs = nil |
| } |
| |
| m.mutex.Lock() |
| m.Addresses = addrs |
| m.mutex.Unlock() |
| } |
| |
| func (m *AddressMap) GetAddressesFor(c cluster.ID) []string { |
| if m == nil { |
| return nil |
| } |
| |
| m.mutex.RLock() |
| defer m.mutex.RUnlock() |
| |
| if m.Addresses == nil { |
| return nil |
| } |
| |
| // Copy the Addresses array. |
| return append([]string{}, m.Addresses[c]...) |
| } |
| |
| func (m *AddressMap) SetAddressesFor(c cluster.ID, addresses []string) *AddressMap { |
| m.mutex.Lock() |
| defer m.mutex.Unlock() |
| |
| if len(addresses) == 0 { |
| // Setting an empty array for the cluster. Remove the entry for the cluster if it exists. |
| if m.Addresses != nil { |
| delete(m.Addresses, c) |
| |
| // Delete the map if there's nothing left. |
| if len(m.Addresses) == 0 { |
| m.Addresses = nil |
| } |
| } |
| } else { |
| // Create the map if if doesn't already exist. |
| if m.Addresses == nil { |
| m.Addresses = make(map[cluster.ID][]string) |
| } |
| m.Addresses[c] = addresses |
| } |
| return m |
| } |
| |
| func (m *AddressMap) AddAddressesFor(c cluster.ID, addresses []string) *AddressMap { |
| if len(addresses) == 0 { |
| return m |
| } |
| |
| m.mutex.Lock() |
| defer m.mutex.Unlock() |
| |
| // Create the map if nil. |
| if m.Addresses == nil { |
| m.Addresses = make(map[cluster.ID][]string) |
| } |
| |
| m.Addresses[c] = append(m.Addresses[c], addresses...) |
| return m |
| } |
| |
| func (m *AddressMap) ForEach(fn func(c cluster.ID, addresses []string)) { |
| if m == nil { |
| return |
| } |
| |
| m.mutex.RLock() |
| defer m.mutex.RUnlock() |
| |
| if m.Addresses == nil { |
| return |
| } |
| |
| for c, addresses := range m.Addresses { |
| fn(c, addresses) |
| } |
| } |