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session.go
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session.go
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package signalfx
import (
"context"
"fmt"
google_rpc "github.com/gogo/googleapis/google/rpc"
"github.com/golang/glog"
"github.com/signalfx/signalfx-istio-adapter/signalfx/config"
mixer_v1beta1 "istio.io/api/mixer/adapter/model/v1beta1"
)
var _ mixer_v1beta1.InfrastructureBackendServer = &Adapter{}
// Validate is called by the mixer to ensure that the config is valid
func (s *Adapter) Validate(ctx context.Context, req *mixer_v1beta1.ValidateRequest) (*mixer_v1beta1.ValidateResponse, error) {
conf, err := parseConfig(req.AdapterConfig)
if err != nil {
glog.Errorf("Error parsing adapter config: %s", err.Error())
return nil, fmt.Errorf("could not parse adapter config: %s", err.Error())
}
if err := config.Validate(conf); err != nil {
return nil, err
}
return &mixer_v1beta1.ValidateResponse{
Status: &google_rpc.Status{
Code: int32(google_rpc.OK),
},
}, nil
}
// CreateSession is called when the mixer wants a new session.
func (s *Adapter) CreateSession(ctx context.Context, req *mixer_v1beta1.CreateSessionRequest) (*mixer_v1beta1.CreateSessionResponse, error) {
conf, err := parseConfig(req.AdapterConfig)
if err != nil {
glog.Errorf("Error parsing adapter config: %v", err)
return nil, fmt.Errorf("could not parse adapter config: %v", err)
}
sessID, err := randomHex(16)
if err != nil {
return nil, err
}
metricHandlerInst, err := createMetricHandler(conf)
if err != nil {
return nil, err
}
traceSpanHandlerInst, err := createTracingHandler(conf)
if err != nil {
return nil, err
}
s.metricHandlers[sessionID(sessID)] = metricHandlerInst
s.traceSpanHandlers[sessionID(sessID)] = traceSpanHandlerInst
glog.Infof("Creating session %s", sessID)
return &mixer_v1beta1.CreateSessionResponse{
SessionId: sessID,
Status: &google_rpc.Status{
Code: int32(google_rpc.OK),
},
}, nil
}
// CloseSession is called by the mixer when a session is done and should be
// cleaned up
func (s *Adapter) CloseSession(ctx context.Context, req *mixer_v1beta1.CloseSessionRequest) (*mixer_v1beta1.CloseSessionResponse, error) {
sessID := sessionID(req.GetSessionId())
if h, ok := s.metricHandlers[sessID]; ok {
h.Shutdown()
delete(s.metricHandlers, sessID)
}
if h, ok := s.traceSpanHandlers[sessID]; ok {
h.Shutdown()
delete(s.traceSpanHandlers, sessID)
}
glog.Infof("Closed session %s", sessID)
return &mixer_v1beta1.CloseSessionResponse{
Status: &google_rpc.Status{
Code: int32(google_rpc.OK),
},
}, nil
}