forked from jaegertracing/jaeger
/
collector_proxy.go
77 lines (68 loc) · 2.71 KB
/
collector_proxy.go
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// Copyright (c) 2018 The Jaeger 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 grpc
import (
"errors"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"google.golang.org/grpc"
"google.golang.org/grpc/balancer/roundrobin"
"google.golang.org/grpc/resolver"
"google.golang.org/grpc/resolver/manual"
"github.com/jaegertracing/jaeger/cmd/agent/app/configmanager"
grpcManager "github.com/jaegertracing/jaeger/cmd/agent/app/configmanager/grpc"
aReporter "github.com/jaegertracing/jaeger/cmd/agent/app/reporter"
)
// ProxyBuilder holds objects communicating with collector
type ProxyBuilder struct {
reporter aReporter.Reporter
manager configmanager.ClientConfigManager
conn *grpc.ClientConn
}
// NewCollectorProxy creates ProxyBuilder
func NewCollectorProxy(o *Options, mFactory metrics.Factory, logger *zap.Logger) (*ProxyBuilder, error) {
if len(o.CollectorHostPort) == 0 {
return nil, errors.New("could not create collector proxy, address is missing")
}
var conn *grpc.ClientConn
if len(o.CollectorHostPort) > 1 {
r, _ := manual.GenerateAndRegisterManualResolver()
var resolvedAddrs []resolver.Address
for _, addr := range o.CollectorHostPort {
resolvedAddrs = append(resolvedAddrs, resolver.Address{Addr: addr})
}
r.InitialAddrs(resolvedAddrs)
conn, _ = grpc.Dial(r.Scheme()+":///round_robin", grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
} else {
// It does not return error if the collector is not running
conn, _ = grpc.Dial(o.CollectorHostPort[0], grpc.WithInsecure(), grpc.WithBalancerName(roundrobin.Name))
}
grpcMetrics := mFactory.Namespace(metrics.NSOptions{Name: "", Tags: map[string]string{"protocol": "grpc"}})
return &ProxyBuilder{
conn: conn,
reporter: aReporter.WrapWithMetrics(NewReporter(conn, logger), grpcMetrics),
manager: configmanager.WrapWithMetrics(grpcManager.NewConfigManager(conn), grpcMetrics)}, nil
}
// GetReporter returns Reporter
func (b ProxyBuilder) GetReporter() aReporter.Reporter {
return b.reporter
}
// GetManager returns manager
func (b ProxyBuilder) GetManager() configmanager.ClientConfigManager {
return b.manager
}
// Close closes connections used by proxy.
func (b ProxyBuilder) Close() error {
return b.conn.Close()
}