/
healthcheckextension.go
88 lines (70 loc) · 2.09 KB
/
healthcheckextension.go
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// Copyright The OpenTelemetry 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 healthcheckextension
import (
"context"
"net"
"net/http"
"strconv"
"github.com/jaegertracing/jaeger/pkg/healthcheck"
"go.uber.org/zap"
"go.opentelemetry.io/collector/component"
)
type healthCheckExtension struct {
config Config
logger *zap.Logger
state *healthcheck.HealthCheck
server http.Server
}
var _ (component.PipelineWatcher) = (*healthCheckExtension)(nil)
func (hc *healthCheckExtension) Start(ctx context.Context, host component.Host) error {
hc.logger.Info("Starting health_check extension", zap.Any("config", hc.config))
// Initialize listener
portStr := ":" + strconv.Itoa(int(hc.config.Port))
ln, err := net.Listen("tcp", portStr)
if err != nil {
host.ReportFatalError(err)
return nil
}
// Mount HC handler
hc.server.Handler = hc.state.Handler()
go func() {
// The listener ownership goes to the server.
if err := hc.server.Serve(ln); err != http.ErrServerClosed && err != nil {
host.ReportFatalError(err)
}
}()
return nil
}
func (hc *healthCheckExtension) Shutdown(context.Context) error {
return hc.server.Close()
}
func (hc *healthCheckExtension) Ready() error {
hc.state.Set(healthcheck.Ready)
return nil
}
func (hc *healthCheckExtension) NotReady() error {
hc.state.Set(healthcheck.Unavailable)
return nil
}
func newServer(config Config, logger *zap.Logger) (*healthCheckExtension, error) {
hc := &healthCheckExtension{
config: config,
logger: logger,
state: healthcheck.New(),
server: http.Server{},
}
hc.state.SetLogger(logger)
return hc, nil
}