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app.go
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app.go
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// Copyright 2021 MIMIRO AS
//
// 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 datahub
import (
"context"
"fmt"
"github.com/DataDog/datadog-go/v5/statsd"
"github.com/labstack/echo/v4"
"github.com/mimiro-io/datahub/internal/conf"
"github.com/mimiro-io/datahub/internal/content"
"github.com/mimiro-io/datahub/internal/jobs"
"github.com/mimiro-io/datahub/internal/security"
"github.com/mimiro-io/datahub/internal/server"
"github.com/mimiro-io/datahub/internal/web"
"go.uber.org/zap"
"os"
"os/signal"
"syscall"
)
type DatahubInstance struct {
config *conf.Config
metricsClient statsd.ClientInterface
logger *zap.SugaredLogger
eventBus server.EventBus
store *server.Store
dsManager *server.DsManager
providerManager *security.ProviderManager
tokenProviders *security.TokenProviders
runner *jobs.Runner
scheduler *jobs.Scheduler
contentService *content.Service
authorizer func(logger *zap.SugaredLogger, scopes ...string) echo.MiddlewareFunc
webService *web.WebService
middleware *web.Middleware
securityServiceCore *security.ServiceCore
gc *server.GarbageCollector
backup *server.BackupManager
}
func (dhi *DatahubInstance) Start() error {
dhi.logger.Info("Starting data hub instance")
// start web server
go func() {
err := dhi.webService.Start(context.Background())
if err != nil {
dhi.logger.Fatal(err)
}
}()
dhi.waitForStop()
return nil
}
func LoadConfig(configLocation string) (*conf.Config, error) {
return conf.LoadConfig(configLocation)
}
func Run(env *conf.Config) {
dhi, err := NewDatahubInstance(env)
if err != nil {
fmt.Println("error initialising data hub " + err.Error())
return
}
err = dhi.Start()
if err != nil {
fmt.Println("error starting data hub " + err.Error())
}
}
func (dhi *DatahubInstance) Stop(ctx context.Context) error {
dhi.logger.Info("Data hub stopping")
dhi.webService.Stop(ctx)
dhi.gc.Stop(ctx)
dhi.scheduler.Stop(ctx)
dhi.store.Close()
return nil
}
func (dhi *DatahubInstance) waitForStop() {
sigChan := make(chan os.Signal, 1)
signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)
<-sigChan
dhi.logger.Info("Data hub stopping")
shutdownCtx := context.Background()
dhi.Stop(shutdownCtx)
dhi.logger.Info("Data hub stopped")
os.Exit(0)
}
func NewDatahubInstance(config *conf.Config) (*DatahubInstance, error) {
dhi := &DatahubInstance{}
var err error
dhi.config = config
dhi.logger = conf.NewLogger(dhi.config)
dhi.metricsClient, err = conf.NewMetricsClient(dhi.config, dhi.logger)
if err != nil {
return nil, err
}
dhi.eventBus, err = server.NewBus(dhi.config)
// create store and add it to services
dhi.store = server.NewStore(dhi.config, dhi.metricsClient)
dhi.dsManager = server.NewDsManager(dhi.config, dhi.store, dhi.eventBus)
dhi.providerManager = security.NewProviderManager(dhi.config, dhi.store, dhi.logger)
dhi.securityServiceCore = security.NewServiceCore(dhi.config)
dhi.tokenProviders = security.NewTokenProviders(dhi.logger, dhi.providerManager, dhi.securityServiceCore)
dhi.runner = jobs.NewRunner(dhi.config, dhi.store, dhi.tokenProviders, dhi.eventBus, dhi.metricsClient)
dhi.scheduler = jobs.NewScheduler(dhi.config, dhi.store, dhi.dsManager, dhi.runner)
dhi.contentService = content.NewContentService(dhi.config, dhi.store, dhi.metricsClient)
dhi.authorizer = web.NewAuthorizer(dhi.config, dhi.logger, dhi.securityServiceCore)
// other core services
conf.InitNewMemoryReporter(dhi.metricsClient, dhi.logger)
dhi.backup, err = server.NewBackupManager(dhi.store, dhi.config)
if err != nil {
return nil, err
}
dhi.gc = server.NewGarbageCollector(dhi.store, dhi.config)
// dhi.gc.Start(context.Background())
// web service config from dhi (ideally we pass through the dhi here or interface)
// this approach avoids an import loop. which can also be solved by moving some code around
serviceContext := &web.ServiceContext{}
serviceContext.Env = dhi.config
serviceContext.ContentService = dhi.contentService
serviceContext.Logger = dhi.logger
serviceContext.Statsd = dhi.metricsClient
serviceContext.SecurityCore = dhi.securityServiceCore
serviceContext.JobsScheduler = dhi.scheduler
serviceContext.DatasetManager = dhi.dsManager
serviceContext.EventBus = dhi.eventBus
serviceContext.Port = dhi.config.Port
serviceContext.TokenProviders = dhi.tokenProviders
serviceContext.Store = dhi.store
dhi.webService, err = web.NewWebService(serviceContext)
// start services
return dhi, nil
}
/*func wire() *fx.App {
fxTimeout := 10 * time.Minute
// set STARTUP_TIMEOUT=120s to override the default timeout
override, found := os.LookupEnv("STARTUP_TIMEOUT")
if found {
d, err := time.ParseDuration(override)
if err == nil {
fxTimeout = d
}
}
return fx.New(
fx.Options(
fx.StartTimeout(fxTimeout),
),
fx.Provide(
conf.LoadConfig,
conf.NewMetricsClient,
conf.NewLogger,
server.NewBus,
server.NewStore,
server.NewDsManager,
security.NewProviderManager,
security.NewTokenProviders,
jobs.NewRunner,
jobs.NewScheduler,
content.NewContent,
web.NewAuthorizer,
web.NewWebService,
web.NewMiddleware,
security.NewServiceCore,
),
fx.Invoke( // no other functions are using these, so they need to be invoked to kick things off
conf.NewMemoryReporter,
// web.Register,
web.NewContentHandler,
web.NewDatasetHandler,
web.NewTxnHandler,
web.NewQueryHandler,
web.NewJobOperationHandler,
web.NewJobsHandler,
web.NewNamespaceHandler,
web.NewProviderHandler,
server.NewBackupManager,
server.NewGarbageCollector,
web.NewSecurityHandler,
),
)
}
func Start(ctx context.Context) (*fx.App, error) {
app := wire()
err := app.Start(ctx)
return app, err
} */