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rubban.go
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rubban.go
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package rubban
import (
"context"
"fmt"
"os"
"github.com/Masterminds/semver/v3"
"github.com/sherifabdlnaby/rubban/config"
"github.com/sherifabdlnaby/rubban/log"
"github.com/sherifabdlnaby/rubban/rubban/autoindexpattern"
"github.com/sherifabdlnaby/rubban/rubban/kibana"
"github.com/sherifabdlnaby/rubban/rubban/refreshindexpattern"
)
//Rubban App Structure
type Rubban struct {
config *config.Config
logger log.Logger
semVer semver.Version
api kibana.API
scheduler scheduler
autoIndexPattern autoindexpattern.AutoIndexPattern
refreshIndexPattern refreshindexpattern.RefreshIndexPattern
mainCtx context.Context
cancel context.CancelFunc
}
//New Create new App structure
func New() *Rubban {
rootCtx, cancel := context.WithCancel(context.Background())
return &Rubban{mainCtx: rootCtx, cancel: cancel, logger: log.Default()}
}
var errFailedToInitialize = fmt.Errorf("failed to Initialize application")
//Initialize Initialize Application after Loading Configuration
func (r *Rubban) Initialize() error {
var err error
// Load config
r.config, err = config.Load("Rubban")
if err != nil {
r.logger.Fatalw("Failed to load configuration.", "error", err)
os.Exit(1)
}
// Init logger
r.logger = log.NewZapLoggerImpl("Rubban", r.config.Logging)
r.logger.Info("Successfully Loaded Configuration")
// Create scheduler
r.scheduler = *newScheduler(r.mainCtx, r.logger.Extend("scheduler"))
// Init Kibana API client
err = r.initKibanaClient(r.mainCtx)
if err != nil {
r.logger.Fatalw("Failed to initialize Kibana API", "error", err)
}
// Init Tasks
r.initTasks()
// Register Tasks
err = r.registerTasks()
if err != nil {
r.logger.Fatalw("Failed to initialize scheduler", "error", err)
}
return nil
}
//Start Start Rubban
func (r *Rubban) Start() {
r.logger.Infof("Starting Rubban...")
// Start scheduler
r.scheduler.Start()
}
//Stop Rubban (Will wait for everything to finish)
func (r *Rubban) Stop() {
r.logger.Infof("Rubban is Stopping...")
// Cancel Main Context
r.cancel()
// Stop and Wait for all running jobs to finish
r.scheduler.Stop()
r.logger.Infof("Stopped.")
r.logger.Infof("Goodbye <3")
}
func (r *Rubban) initTasks() {
if r.config.AutoIndexPattern.Enabled {
r.autoIndexPattern = *autoindexpattern.NewAutoIndexPattern(r.config.AutoIndexPattern, r.api, r.logger.Extend("autoIndexPattern"))
r.logger.Infof("Enabled %s, Loaded %d General Pattern(s)", r.autoIndexPattern.Name(), len(r.autoIndexPattern.GeneralPatterns))
}
if r.config.RefreshIndexPattern.Enabled {
r.refreshIndexPattern = *refreshindexpattern.NewRefreshIndexPattern(r.config.RefreshIndexPattern, r.api, r.logger.Extend("refreshIndexPattern"))
r.logger.Infof("Enabled %s, Refreshing %d Pattern(s)", r.refreshIndexPattern.Name(), len(r.refreshIndexPattern.Patterns))
}
// ... Init Other Tasks in future
}
func (r *Rubban) registerTasks() error {
// Register Auto Index Pattern
if r.config.AutoIndexPattern.Enabled {
err := r.scheduler.Register(r.config.AutoIndexPattern.Schedule, &r.autoIndexPattern)
if err != nil {
return fmt.Errorf("failed to register task, error: %s", err.Error())
}
}
if r.config.RefreshIndexPattern.Enabled {
err := r.scheduler.Register(r.config.RefreshIndexPattern.Schedule, &r.refreshIndexPattern)
if err != nil {
return fmt.Errorf("failed to register task, error: %s", err.Error())
}
}
// ... Register Other Tasks in future
return nil
}
func (r *Rubban) initKibanaClient(ctx context.Context) error {
r.logger.Info("Initializing Kibana API client...")
genAPI, err := kibana.NewAPIGen(r.config.Kibana, r.logger.Extend("api"))
if err != nil {
r.logger.Fatalw("Could not Initialize Kibana API client", "error", err.Error())
return errFailedToInitialize
}
// Validate Connection to General API (Not versioned yet as we don't have version)
if err = genAPI.Validate(ctx); err != nil {
r.logger.Fatalw("Cannot Initialize Rubban without an Initial Connection to Kibana API", "error", err.Error())
return errFailedToInitialize
}
r.logger.Info("Validated Initial Connection to Kibana API")
// Get Kibana Version (To Determine which set of APIs to use later)
r.semVer, err = genAPI.GuessVersion(ctx)
if err != nil {
r.logger.Fatalw("Couldn't determine kibana version", "error", err.Error())
return errFailedToInitialize
}
r.logger.Infow(fmt.Sprintf("Determined Kibana Version: %s", r.semVer.String()))
// Determine API
ver7, _ := semver.NewVersion("7.0.0")
if r.semVer.GreaterThan(ver7) || r.semVer.Equal(ver7) {
r.api, err = kibana.NewAPIVer7(r.config.Kibana, r.logger)
if err != nil {
r.logger.Fatalw("Could not Initialize Kibana API client", "error", err.Error())
return errFailedToInitialize
}
} else {
r.logger.Fatalf("Version %s is not Supported", r.semVer.String())
return errFailedToInitialize
}
return nil
}