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engineimpl.go
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/
engineimpl.go
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package engine
import (
"fmt"
"github.com/qingcloudhx/core/data/property"
"strings"
"github.com/qingcloudhx/core/action"
"github.com/qingcloudhx/core/app"
"github.com/qingcloudhx/core/engine/channels"
"github.com/qingcloudhx/core/engine/runner"
"github.com/qingcloudhx/core/engine/secret"
"github.com/qingcloudhx/core/support"
"github.com/qingcloudhx/core/support/log"
"github.com/qingcloudhx/core/support/managed"
)
// engineImpl is the type for the Default Engine Implementation
type engineImpl struct {
config *Config
flogoApp *app.App
actionRunner action.Runner
serviceManager *support.ServiceManager
logger log.Logger
}
type Option func(*engineImpl)
// New creates a new Engine
func New(appConfig *app.Config, options ...Option) (Engine, error) {
if appConfig == nil {
return nil, fmt.Errorf("no App configuration provided")
}
if len(appConfig.Name) == 0 {
return nil, fmt.Errorf("no App name provided")
}
//log.Init(appConfig.Name)
if len(appConfig.Version) == 0 {
return nil, fmt.Errorf("no App version provided")
}
engine := &engineImpl{}
logger := log.ChildLogger(log.RootLogger(), "engine")
engine.logger = logger
//log.SetLogLevel(log.DebugLevel, logger)
if engine.config == nil {
config := &Config{}
config.StopEngineOnError = true
config.RunnerType = GetRunnerType()
//config.LogLevel = DefaultLogLevel
engine.config = config
}
for _, option := range options {
option(engine)
}
//add engine channels - todo should these be moved to app
channelDescriptors := appConfig.Channels
if len(channelDescriptors) > 0 {
for _, descriptor := range channelDescriptors {
name, buffSize := channels.Decode(descriptor)
logger.Debugf("Creating Engine Channel '%s'", name)
_, err := channels.New(name, buffSize)
if err != nil {
return nil, err
}
}
}
if engine.actionRunner == nil {
var actionRunner action.Runner
runnerType := engine.config.RunnerType
if strings.EqualFold(ValueRunnerTypePooled, runnerType) {
actionRunner = runner.NewPooled(NewPooledRunnerConfig())
} else if strings.EqualFold(ValueRunnerTypeDirect, runnerType) {
actionRunner = runner.NewDirect()
} else {
return nil, fmt.Errorf("unknown runner type: %s", runnerType)
}
logger.Debugf("Using '%s' Action Runner", runnerType)
engine.actionRunner = actionRunner
}
var appOptions []app.Option
if !engine.config.StopEngineOnError {
appOptions = append(appOptions, app.ContinueOnError)
}
propResolvers := GetAppPropertyValueResolvers(logger)
enablePropertiesResolution := false
if len(propResolvers) > 0 {
err := property.EnablePropertyResolvers(propResolvers)
if err != nil {
return nil, err
}
enablePropertiesResolution = true
}
// properties post processors (properties resolver if enabled, secret properties replacer)
var postProcessors []property.PostProcessor
if enablePropertiesResolution {
postProcessors = append(postProcessors, property.PropertyResolverProcessor)
}
postProcessors = append(postProcessors, secret.PropertyProcessor)
option := app.FinalizeProperties(postProcessors...)
appOptions = append(appOptions, option)
flogoApp, err := app.New(appConfig, engine.actionRunner, appOptions...)
if err != nil {
return nil, err
}
logger.Debugf("Creating app [ %s ] with version [ %s ]", appConfig.Name, appConfig.Version)
engine.flogoApp = flogoApp
engine.serviceManager = support.GetDefaultServiceManager()
return engine, nil
}
func (e *engineImpl) App() *app.App {
return e.flogoApp
}
//Start initializes and starts the Triggers and initializes the Actions
func (e *engineImpl) Start() error {
logger := e.logger
logger.Infof("Starting app [ %s ] with version [ %s ]", e.flogoApp.Name(), e.flogoApp.Version())
logger.Info("Engine Starting...")
logger.Info("Starting Services...")
actionRunner := e.actionRunner.(interface{})
if managedRunner, ok := actionRunner.(managed.Managed); ok {
_ = managed.Start("ActionRunner Service", managedRunner)
}
err := e.serviceManager.Start()
if err != nil {
logger.Error("Error Starting Services - " + err.Error())
} else {
logger.Info("Started Services")
}
if len(managedServices) > 0 {
for _, mService := range managedServices {
err = mService.Start()
if err != nil {
logger.Error("Error Starting Services - " + err.Error())
//TODO Should we exit here?
}
}
}
logger.Info("Starting Application...")
err = e.flogoApp.Start()
if err != nil {
return err
}
logger.Info("Application Started")
if channels.Count() > 0 {
logger.Info("Starting Engine Channels...")
_ = channels.Start()
logger.Info("Engine Channels Started")
}
logger.Info("Engine Started")
return nil
}
func (e *engineImpl) Stop() error {
logger := e.logger
logger.Info("Engine Stopping...")
if channels.Count() > 0 {
logger.Info("Stopping Engine Channels...")
_ = channels.Stop()
logger.Info("Engine Channels Stopped...")
}
logger.Info("Stopping Application...")
_ = e.flogoApp.Stop()
logger.Info("Application Stopped")
//TODO temporarily add services
logger.Info("Stopping Services...")
actionRunner := e.actionRunner.(interface{})
if managedRunner, ok := actionRunner.(managed.Managed); ok {
_ = managed.Stop("ActionRunner", managedRunner)
}
err := e.serviceManager.Stop()
if err != nil {
logger.Error("Error Stopping Services - " + err.Error())
} else {
logger.Info("Stopped Services")
}
if len(managedServices) > 0 {
for _, mService := range managedServices {
err = mService.Stop()
if err != nil {
logger.Error("Error Stopping Services - " + err.Error())
}
}
}
logger.Info("Engine Stopped")
log.Sync()
return nil
}