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fda720b880
issue: #33285 - add two grpc resolver (by session and by streaming coord assignment service) - add one grpc balancer (by serverID and roundrobin) - add lazy conn to avoid block by first service discovery - add some utility function for streaming service Signed-off-by: chyezh <chyezh@outlook.com>
51 lines
1.6 KiB
Go
51 lines
1.6 KiB
Go
/*
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*
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* Copyright 2017 gRPC authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Modified by github.com/milvus-io/milvus, @chyezh
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* - Only keep modified struct `PickerBuildInfo`, `PickerBuilder`, remove unmodified struct.
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*
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*/
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package balancer
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import (
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"google.golang.org/grpc/balancer"
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"google.golang.org/grpc/balancer/base"
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)
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type PickerBuildInfo struct {
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// ReadySCs is a map from all ready SubConns to the Addresses can be used.
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ReadySCs map[balancer.SubConn]base.SubConnInfo
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// UnReadySCs is a map from all unready SubConns to the Addresses can be used.
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UnReadySCs map[balancer.SubConn]base.SubConnInfo
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}
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// PickerBuilder creates balancer.Picker.
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type PickerBuilder interface {
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// Build returns a picker that will be used by gRPC to pick a SubConn.
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Build(info PickerBuildInfo) balancer.Picker
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}
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// NewBalancerBuilder returns a base balancer builder configured by the provided config.
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func NewBalancerBuilder(name string, pb PickerBuilder, config base.Config) balancer.Builder {
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return &baseBuilder{
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name: name,
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pickerBuilder: pb,
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config: config,
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}
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}
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