| // 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 loadbalancer |
| |
| import ( |
| mesh2 "github.com/apache/dubbo-go-pixiu/pkg/test/loadbalancersim/mesh" |
| network2 "github.com/apache/dubbo-go-pixiu/pkg/test/loadbalancersim/network" |
| "github.com/apache/dubbo-go-pixiu/pkg/test/loadbalancersim/timeseries" |
| ) |
| |
| type WeightedConnection struct { |
| network2.Connection |
| Weight uint32 |
| } |
| |
| type weightedConnections struct { |
| conns []*WeightedConnection |
| helper *network2.ConnectionHelper |
| } |
| |
| func newLBConnection(name string, conns []*WeightedConnection) *weightedConnections { |
| return &weightedConnections{ |
| conns: conns, |
| helper: network2.NewConnectionHelper(name), |
| } |
| } |
| |
| func (lb *weightedConnections) AllWeightsEqual() bool { |
| if len(lb.conns) == 0 { |
| return true |
| } |
| |
| weight := lb.conns[0].Weight |
| for _, conn := range lb.conns { |
| if conn.Weight != weight { |
| return false |
| } |
| } |
| return true |
| } |
| |
| func (lb *weightedConnections) get(index int) *WeightedConnection { |
| return lb.conns[index] |
| } |
| |
| func (lb *weightedConnections) doRequest(c *WeightedConnection, onDone func()) { |
| lb.helper.Request(c.Request, onDone) |
| } |
| |
| func (lb *weightedConnections) Name() string { |
| return lb.helper.Name() |
| } |
| |
| func (lb *weightedConnections) TotalRequests() uint64 { |
| return lb.helper.TotalRequests() |
| } |
| |
| func (lb *weightedConnections) ActiveRequests() uint64 { |
| return lb.helper.ActiveRequests() |
| } |
| |
| func (lb *weightedConnections) Latency() *timeseries.Instance { |
| return lb.helper.Latency() |
| } |
| |
| type WeightedConnectionFactory func(src *mesh2.Client, n *mesh2.Node) *WeightedConnection |
| |
| func EquallyWeightedConnectionFactory() WeightedConnectionFactory { |
| return func(src *mesh2.Client, dest *mesh2.Node) *WeightedConnection { |
| return &WeightedConnection{ |
| Connection: src.Mesh().NewConnection(src, dest), |
| Weight: 1, |
| } |
| } |
| } |
| |
| func PriorityWeightedConnectionFactory(selectPriority PrioritySelector, priorityWeightMap map[uint32]uint32) WeightedConnectionFactory { |
| return func(src *mesh2.Client, dest *mesh2.Node) *WeightedConnection { |
| // Select the priority for this node. |
| priority := selectPriority(src, dest) |
| |
| // Get the weight for the priority. |
| weight := uint32(1) |
| if priorityWeightMap != nil { |
| if w := priorityWeightMap[priority]; w > 0 { |
| weight = w |
| } |
| } |
| |
| return &WeightedConnection{ |
| Connection: src.Mesh().NewConnection(src, dest), |
| Weight: weight, |
| } |
| } |
| } |