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How to use StartPlugins method of plugin Package

Best Gauge code snippet using plugin.StartPlugins

plugins.go

Source:plugins.go

1/*2 *  Copyright 2020 F5 Networks3 *4 *  Licensed under the Apache License, Version 2.0 (the "License");5 *  you may not use this file except in compliance with the License.6 *  You may obtain a copy of the License at7 *8 *      http://www.apache.org/licenses/LICENSE-2.09 *10 *  Unless required by applicable law or agreed to in writing, software11 *  distributed under the License is distributed on an "AS IS" BASIS,12 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.13 *  See the License for the specific language governing permissions and14 *  limitations under the License.15 */16package initapp17import (18	"github.com/davecgh/go-spew/spew"19	slog "github.com/go-eden/slf4go"20	"github.com/nginxinc/nginx-wrapper/app/config"21	"github.com/nginxinc/nginx-wrapper/app/embeddedplugins"22	"github.com/nginxinc/nginx-wrapper/lib/api"23	"github.com/nginxinc/nginx-wrapper/lib/osenv"24	"github.com/pkg/errors"25	"github.com/spf13/viper"26	"os"27	"path/filepath"28	"plugin"29	"reflect"30	"strings"31)32func initPlugins(startPlugins bool, vconfig *viper.Viper) {33	initEmbeddedPlugins(startPlugins, vconfig)34	initExternalPlugins(startPlugins, vconfig)35}36func initEmbeddedPlugins(startPlugins bool, vconfig *viper.Viper) {37	embeddedplugins.LoadAll(startPlugins, vconfig)38}39func initExternalPlugins(startPlugins bool, vconfig *viper.Viper) {40	log := slog.NewLogger("init-plugins")41	pluginPath := vconfig.GetString("plugin_path")42	if pluginPath == "" {43		log.Errorf("plugin_path is blank - can't load plugins")44		return45	}46	pathInfo, statErr := os.Stat(pluginPath)47	if statErr != nil {48		log.Errorf("error reading plugin_path (%s) - can't load plugins: %v",49			pluginPath, statErr)50		return51	}52	if !pathInfo.IsDir() {53		log.Error("plugin_path is not a directory - can't load plugins")54		return55	}56	var plugins []string57	walkErr := filepath.Walk(pluginPath, func(path string, info os.FileInfo, err error) error {58		// skip directories59		// skip files without the shared object suffix60		if !info.IsDir() && strings.HasSuffix(path, osenv.SharedObjectSuffix) {61			plugins = append(plugins, path)62		}63		return nil64	})65	if walkErr != nil {66		log.Errorf("unable to traverse plugin_path - can't load plugins: %v",67			walkErr)68		return69	}70	for _, file := range plugins {71		loadPluginErr := loadPlugin(file, startPlugins, vconfig)72		if loadPluginErr != nil {73			if strings.Contains(errors.Cause(loadPluginErr).Error(),74				"plugin was built with a different version of package") {75				log.Warn(loadPluginErr)76			} else {77				log.Errorf("unable to load plugin (%s): %+v", file, loadPluginErr)78			}79		}80	}81}82func loadPlugin(file string, startPlugins bool, vconfig *viper.Viper) error {83	log := slog.NewLogger("load-plugin")84	pluginRef, pluginOpenErr := plugin.Open(file)85	if pluginOpenErr != nil {86		return errors.Wrap(pluginOpenErr, "unable to open plugin file")87	}88	metadata, loadMetadataErr := loadPluginMetadata(pluginRef, vconfig)89	if loadMetadataErr != nil {90		return errors.Wrap(loadMetadataErr, "unable to load plugin metadata")91	}92	start, loadStartFuncErr := loadPluginStartFunc(pluginRef)93	if loadStartFuncErr != nil {94		return errors.Wrap(loadStartFuncErr, "unable to load plugin Start func")95	}96	pluginName := metadata["name"].(string)97	if !isPluginEnabled(pluginName, vconfig) {98		log.Debugf("plugin [%s] was detected but not enabled - not loading", pluginName)99		return nil100	}101	configDefaults := metadata["config_defaults"].(map[string]interface{})102	// Add the defaults read from plugin so that we know what are the keys103	// used in a plugin104	config.PluginDefaults[pluginName] = configDefaults105	// Set the defaults as read from the plugin106	for k, v := range configDefaults {107		configKey := pluginName + "." + k108		vconfig.SetDefault(configKey, v)109	}110	if startPlugins {111		startErr := startPlugin(start, pluginName, vconfig)112		if startErr != nil {113			return startErr114		}115		log.Infof("started plugin: [%s]", pluginName)116	} else {117		log.Infof("loaded plugin: [%s]", pluginName)118	}119	return nil120}121func isPluginEnabled(pluginName string, vconfig *viper.Viper) bool {122	enabledPlugins := vconfig.GetStringSlice("enabled_plugins")123	found := false124	for _, p := range enabledPlugins {125		if p == pluginName {126			found = true127			break128		}129	}130	return found131}132func startPlugin(startFunc func(api.PluginStartupContext) error, pluginName string,133	vconfig api.Settings) error {134	context := api.PluginStartupContext{135		Settings: vconfig,136	}137	// It is the plugin's decision if they want to kick off138	// another go worker. However, the plugin must return139	// from the Start() function.140	startErr := startFunc(context)141	if startErr != nil {142		return errors.Wrapf(startErr, "error starting plugin (%s)", pluginName)143	}144	return nil145}146func loadPluginMetadata(pluginRef *plugin.Plugin, settings api.Settings) (map[string]interface{}, error) {147	pluginSymbol, lookupErr := pluginRef.Lookup("Metadata")148	if lookupErr != nil {149		return nil, errors.Wrapf(lookupErr, "unable to load plugin metadata (%v)", pluginRef)150	}151	metadata, ok := pluginSymbol.(func(settings api.Settings) map[string]interface{})152	if !ok {153		return nil, errors.Errorf("unable to load plugin metadata from symbol (%v).Metadata()", pluginRef)154	}155	m := metadata(settings)156	if m["name"] == nil {157		return nil, errors.WithStack(&PluginMetadataKeyMissing{KeyMissing: "name"})158	}159	if reflect.ValueOf(m["name"]).Kind() != reflect.String {160		return nil, errors.WithStack(&PluginMetadataMalformedType{161			KeyName:      "name",162			ExpectedType: reflect.String,163		})164	}165	if m["config_defaults"] == nil {166		m["config_defaults"] = map[string]interface{}{}167	}168	if reflect.ValueOf(m["config_defaults"]).Kind() != reflect.Map {169		return nil, errors.WithStack(&PluginMetadataMalformedType{170			KeyName:      "config_defaults",171			ExpectedType: reflect.Map,172		})173	}174	return m, nil175}176func loadPluginStartFunc(pluginRef *plugin.Plugin) (func(api.PluginStartupContext) error, error) {177	pluginSymbol, lookupErr := pluginRef.Lookup("Start")178	if lookupErr != nil {179		return nil, errors.Wrapf(lookupErr, "unable to load plugin start function (%v)",180			pluginRef)181	}182	start, ok := pluginSymbol.(func(api.PluginStartupContext) error)183	if !ok {184		return nil, errors.Errorf("unexpected type (%v) from start module symbol",185			spew.Sdump(start))186	}187	return start, nil188}...

server.go

Source:server.go

...59	s.mux.Handle(path, s.handlers[path])60}61// ListenAndServe starts all plugins before starting the block Server62func (s *Server) ListenAndServe() error {63	if err := s.StartPlugins(); err != nil {64		return err65	}66	lis, err := net.Listen(s.network, fmt.Sprintf("%s:%d", s.Addr, s.Port))67	if err != nil {68		return err69	}70	defer func(lis net.Listener) {71		if err = lis.Close(); err != nil {72			log.Fatalln(err)73		}74	}(lis)75	return s.Serve(lis)76}77func (s *Server) Serve(lis net.Listener) error {78	s.s.Handler = s.mux79	return s.s.Serve(lis)80}81// Shutdown gracefully shutsdown the http server before killing all child processes82func (s *Server) Shutdown() error {83	s.cancel() // kill the server context to allow everything to stop84	ctx, cancel := context.WithTimeout(context.Background(), s.shutdownDuration)85	defer cancel()86	// stop new requests from coming in and shut down the external server87	if err := s.s.Shutdown(ctx); err != nil {88		return err89	}90	// kill each sub process91	for path := range s.handlers {92		if err := s.handlers[path].Kill(); err != nil {93			log.Println(err)94		}95	}96	return nil97}98// StartPlugins launches all plugins as child processes99func (s *Server) StartPlugins() error {100	for path := range s.handlers {101		if err := s.handlers[path].Start(s.config.ConfigPath); err != nil {102			log.WithError(err).Error("s.Handlers[path].Start")103			return err104		}105	}106	return nil107}...

actions.go

Source:actions.go

...37}38func getInstalledPlugins(config *config.Config) (installedPlugins []installedPlugin, err error) {39	var startPlugins []installedPlugin40	var optPlugins []installedPlugin41	startPlugins, err = getInstalledStartPlugins(config)42	optPlugins, err = getInstalledOptPlugins(config)43	installedPlugins = append(startPlugins, optPlugins...)44	return45}46func getInstalledOptPlugins(config *config.Config) ([]installedPlugin, error) {47	installedOptPlugins := make([]installedPlugin, 0)48	var plugins []os.DirEntry49	var err error50	if plugins, err = os.ReadDir(config.PluginOptDir); err != nil {51		return nil, err52	}53	for _, p := range plugins {54		installedOptPlugins = append(installedOptPlugins, installedPlugin{55			Basename: p.Name(),56			FullPath: filepath.Join(config.PluginOptDir, p.Name()),57			Opt:      true,58		})59	}60	return installedOptPlugins, nil61}62func getInstalledStartPlugins(config *config.Config) ([]installedPlugin, error) {63	installedStartPlugins := make([]installedPlugin, 0)64	var plugins []os.DirEntry65	var err error66	if plugins, err = os.ReadDir(config.PluginStartDir); err != nil {67		return nil, err68	}69	for _, p := range plugins {70		installedStartPlugins = append(installedStartPlugins, installedPlugin{71			Basename: p.Name(),72			FullPath: filepath.Join(config.PluginStartDir, p.Name()),73			Opt:      false,74		})75	}76	return installedStartPlugins, nil77}...

StartPlugins

Using AI Code Generation

1import (2func main() {3	p, err := plugin.Open("plugin.so")4	if err != nil {5		panic(err)6	}7	symPlugin, err := p.Lookup("Plugin")8	if err != nil {9		panic(err)10	}11	plugin, ok := symPlugin.(*Plugin)12	if !ok {13		panic("unexpected type from module symbol")14	}15	plugin.StartPlugins()16}17import (18type Plugin struct {19}20func (p *Plugin) StartPlugins() {21	fmt.Println("Plugin started")22}

StartPlugins

Using AI Code Generation

1import (2func main() {3p, _ := plugin.Open("plugin.so")4start, _ := p.Lookup("StartPlugins")5start.(func())()6}7import (8func main() {9p, _ := plugin.Open("plugin.so")10stop, _ := p.Lookup("StopPlugins")11stop.(func())()12}13import (14func main() {15p, _ := plugin.Open("plugin.so")16do, _ := p.Lookup("DoPlugins")17do.(func())()18}19import (20func StartPlugins() {21fmt.Println("StartPlugins")22}23func StopPlugins() {24fmt.Println("StopPlugins")25}26func DoPlugins() {27fmt.Println("DoPlugins")28}29func main() {30}

StartPlugins

Using AI Code Generation

1import (2func main() {3	p, err := plugin.Open("plugin.so")4	if err != nil {5		panic(err)6	}7	symGreeter, err := p.Lookup("Greeter")8	if err != nil {9		panic(err)10	}11	greeter, ok := symGreeter.(GreeterType)12	if !ok {13		panic("unexpected type from module symbol")14	}15	greeter.Greet()16}17import (18func main() {19	p, err := plugin.Open("plugin.so")20	if err != nil {21		panic(err)22	}23	symGreeter, err := p.Lookup("Greeter")24	if err != nil {25		panic(err)26	}27	greeter, ok := symGreeter.(GreeterType)28	if !ok {29		panic("unexpected type from module symbol")30	}31	greeter.Greet()32}33import (34func main() {35	p, err := plugin.Open("plugin.so")36	if err != nil {37		panic(err)38	}39	symGreeter, err := p.Lookup("Greeter")40	if err != nil {41		panic(err)42	}

StartPlugins

Using AI Code Generation

1func main() {2    plugin.StartPlugins()3}4func main() {5    plugin.StartPlugins()6}7func main() {8    plugin.StartPlugins()9}10func main() {11    plugin.StartPlugins()12}13func main() {14    plugin.StartPlugins()15}16func main() {17    plugin.StartPlugins()18}19func main() {20    plugin.StartPlugins()21}22func main() {23    plugin.StartPlugins()24}25func main() {26    plugin.StartPlugins()27}28func main() {29    plugin.StartPlugins()30}31func main() {32    plugin.StartPlugins()33}34func main() {35    plugin.StartPlugins()36}37func main() {38    plugin.StartPlugins()39}40func main() {41    plugin.StartPlugins()42}43func main() {44    plugin.StartPlugins()45}46func main()

StartPlugins

Using AI Code Generation

1import (2func main() {3    p, err := plugin.Open("1.so")4    if err != nil {5        fmt.Println(err)6    }7    start, err := p.Lookup("StartPlugins")8    if err != nil {9        fmt.Println(err)10    }11    start.(func())()12}

StartPlugins

Using AI Code Generation

1import (2func main() {3	var pluginMap = map[string]plugin.Plugin{4		"plugin": &Plugin{},5	}6	client := plugin.NewClient(&plugin.ClientConfig{7		Cmd:              exec.Command("sh", "-c", "go run 2.go"),8		AllowedProtocols: []plugin.Protocol{plugin.ProtocolGRPC},9	})10	rpcClient, err := client.Client()11	if err != nil {12		logrus.Fatal(err)13	}14	raw, err := rpcClient.Dispense("plugin")15	if err != nil {16		logrus.Fatal(err)17	}18	plugin := raw.(PluginInterface)19	fmt.Println(plugin.SayHello())20}21import (22type Plugin struct{}23func (p *Plugin) SayHello() string {24}25func main() {26	var pluginMap = map[string]plugin.Plugin{27		"plugin": &Plugin{},28	}29	plugin.Serve(&plugin.ServeConfig{30	})31}

StartPlugins

Using AI Code Generation

1import (2var logger = logrus.New()3func main() {4	logger.SetFormatter(&logrus.JSONFormatter{})5	logger.SetLevel(logrus.DebugLevel)6	logger.SetOutput(os.Stdout)7	client := plugin.NewClient(&plugin.ClientConfig{8		HandshakeConfig: plugin.HandshakeConfig{9		},10		Plugins: map[string]plugin.Plugin{11			"plugin": &plugin.PluginImpl{},12		},13		AllowedProtocols: []plugin.Protocol{plugin.ProtocolGRPC},14	})15	rpcClient, err := client.Client()16	if err != nil {17		logger.Fatal(err)18	}19	raw, err := rpcClient.Dispense("plugin")20	if err != nil {21		logger.Fatal(err)22	}23	plugin := raw.(plugin.Plugin)24	logger.Info("Plugin started")25	plugin.StartPlugins()26	sigChan := make(chan os.Signal, 1)27	signal.Notify(sigChan, os.Interrupt, syscall.SIGTERM)28	plugin.StopPlugins()29}30import (

StartPlugins

Using AI Code Generation

1import (2func main() {3	plugins := golplugin.NewPlugins()4	plugins.Add("plugin1", "plugin1.so")5	plugins.Add("plugin2", "plugin2.so")6	plugins.StartPlugins()7	fmt.Println("plugins started")8}9import (10type plugin1 struct{}11func (p *plugin1) Init() {12	fmt.Println("plugin1 initialized")13}14func (p *plugin1) Start() {15	fmt.Println("plugin1 started")16}17func (p *plugin1) Stop() {18	fmt.Println("plugin1 stopped")19}20func init() {21	golplugin.Register("plugin1", &plugin1{})22}23import (24type plugin2 struct{}25func (p *plugin2) Init() {26	fmt.Println("plugin2 initialized")27}28func (p *plugin2) Start() {29	fmt.Println("plugin2 started")30}31func (p *plugin2) Stop() {32	fmt.Println("plugin2 stopped")33}34func init() {35	golplugin.Register("plugin2", &plugin2{})36}

StartPlugins

Using AI Code Generation

1import (2func main() {3	fmt.Println("main")4}5import (6func main() {7	fmt.Println("main")8}9import (10func main() {11	fmt.Println("main")12}13import (14func main() {15	fmt.Println("main")16}17import (18func main() {19	fmt.Println("main")20}21import (22func main() {23	fmt.Println("main")24}

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