handler_health_factory.go

/*
 * Copyright © 2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io>
 *
 * 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.
 *
 * @author		Aeneas Rekkas <aeneas+oss@aeneas.io>
 * @copyright 	2015-2018 Aeneas Rekkas <aeneas+oss@aeneas.io>
 * @license 	Apache-2.0
 */

package server

import (
	"github.com/julienschmidt/httprouter"
	"github.com/ory/herodot"
	"github.com/ory/hydra/config"
	"github.com/ory/hydra/health"
	"github.com/ory/sqlcon"
)

func newHealthHandler(c *config.Config, router *httprouter.Router) *health.Handler {
	ctx := c.Context()
	var rc health.ReadyChecker

	switch con := ctx.Connection.(type) {
	case *config.MemoryConnection:
		rc = func() error {
			return nil
		}
		break
	case *sqlcon.SQLConnection:
		expectDependency(c.GetLogger(), con.GetDatabase())
		rc = func() error {
			return con.GetDatabase().Ping()
		}
		break
	case *config.PluginConnection:
		rc = func() error {
			return con.Ping()
		}
		break
	default:
		panic("Unknown connection type.")
	}

	w := herodot.NewJSONWriter(c.GetLogger())
	w.ErrorEnhancer = writerErrorEnhancer

	h := &health.Handler{
		H:             w,
		VersionString: c.BuildVersion,
		ReadyChecks: map[string]health.ReadyChecker{
			"database": rc,
		},
	}

	h.SetRoutes(router)
	return h
}