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factory.go
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factory.go
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// Copyright (c) 2021 The Houyi 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 houyi
import (
"fmt"
"github.com/houyi-tracing/houyi/pkg/routing"
"github.com/opentracing/opentracing-go"
"github.com/spf13/viper"
"go.uber.org/zap"
"io"
)
type Factory interface {
InitFromViper(*viper.Viper)
CreateTracer(serviceName string, logger *zap.Logger) (opentracing.Tracer, io.Closer)
}
type tracerFactory struct {
Options
}
func NewTracerFactory() Factory {
return &tracerFactory{}
}
func (f *tracerFactory) InitFromViper(v *viper.Viper) {
f.Options.InitFromViper(v)
}
func (f *tracerFactory) CreateTracer(serviceName string, logger *zap.Logger) (opentracing.Tracer, io.Closer) {
sampler := f.createSampler(serviceName, logger)
reporter, err := f.createReporter(logger)
if err != nil {
logger.Fatal("Failed to create reporter", zap.Error(err))
return nil, nil
}
tracer := NewTracer(serviceName, &TracerParams{
Logger: logger,
Reporter: reporter,
Sampler: sampler,
})
return tracer, tracer
}
func (f *tracerFactory) createSampler(serviceName string, logger *zap.Logger) Sampler {
return NewRemoteSampler(&RemoteSamplerParams{
Logger: logger,
ServiceName: serviceName,
PullInterval: f.PullStrategiesInterval,
AgentEndpoint: routing.Endpoint{
Addr: f.AgentAddr,
Port: f.AgentPort,
},
})
}
func (f *tracerFactory) createReporter(logger *zap.Logger) (Reporter, error) {
switch f.ReporterType {
case ReporterType_Null:
return NewNullReporter(), nil
case ReporterType_Logging:
return NewLogReporter(logger), nil
case ReporterType_Remote:
transport := NewTransport(&TransportParams{
Logger: logger,
MaxBufferedSize: f.MaxBufferedSize,
AgentEndpoint: routing.Endpoint{
Addr: f.AgentAddr,
Port: f.AgentPort,
},
})
return NewRemoteReporter(&RemoteReporterParams{
Logger: logger,
QueueSize: f.QueueSize,
Interval: f.BufferRefreshInterval,
Transport: transport,
}), nil
default:
return nil, fmt.Errorf("unsupportted type of reporter: %s", f.ReporterType)
}
}