How to use invokeService method of plugin Package

Best Gauge code snippet using plugin.invokeService

worker.go

Source:worker.go

1//////////////////////////////////////////////////////////////////////2//3// G006169494//5// Paul McKerley6//7// CS675 Spring 2020 -- Lab28//9// Worker registers with driver and receives requests to do work.10//11//////////////////////////////////////////////////////////////////////12package main13import (14	"cs675-spring20-labs/lab2/serverless"15	"fmt"16	"log"17	"net"18	"net/rpc"19	"os"20	"plugin"21	"strconv"22	"sync"23)24// Worker holds the state for a server waiting for:25// 1) RegisterService,26// 2) InvokeService,27// 3) Shutdown RPCs.28type Worker struct {29	sync.Mutex30	address    string // address of this worker process31	masterAddr string // address of the driver process32	nThreads   int    // misc. statistics (usage not required)33	nRPC       int    // number of RPC requests to serve before the worker exists34	nTasks     int    // misc. statistics (usage not required)35	concurrent int    // misc. statistics (usage not required)36	l          net.Listener37	shutdown chan struct{}38}39// Service struct maintains the state of a plugin Service.40type Service struct {41	pluginDir string42	name      string43	interf    serverless.Interface44}45// serviceMap is a global map that keeps track of all registered plugin Services.46// You should insert the newly registered service into this map.47var serviceMap = make(map[string]*Service)48// newService initializes a new plugin Service.49func newService(serviceName string) *Service {50	return &Service{51		pluginDir: serverless.PluginDir,52		name:      serviceName,53		interf:    nil,54	}55}56// Finds and opens the plugin.57func (svc *Service) openPlugin() error {58	plug, err := plugin.Open(svc.pluginDir + "/" + svc.name + ".so")59	if err != nil {60		serverless.Debug("Failed to open plugin %s: %v\n", svc.name, err)61		return err62	}63	serverless.Debug("Opened plugin %s\n", svc.name)64	symInterface, err := plug.Lookup("Interface")65	if err != nil {66		serverless.Debug("Error looking up symbol 'Interface' in %s: %v\n", svc.name, err)67		return err68	}69	serverless.Debug("Successfully looked up Interface %s\n", svc.name)70	var interf serverless.Interface71	interf, ok := symInterface.(serverless.Interface)72	if !ok {73		serverless.Debug("Unable to load Interface from %s.\n", svc.name)74		return fmt.Errorf("Unable to load type %s", svc.name)75	}76	svc.interf = interf77	return nil78}79// RegisterService is caled by the driver to plugin a new service that has already been80// compiled into a .so static object library.81func (wk *Worker) RegisterService(args *serverless.ServiceRegisterArgs, _ *struct{}) error {82	serverless.Debug("Register called for %s\n", args.ServiceName)83	service := newService(args.ServiceName)84	err := service.openPlugin()85	if err != nil {86		return err87	}88	serviceMap[args.ServiceName] = service89	serverless.Debug("Successfully registered new service %s\n", args.ServiceName)90	return nil91}92// InvokeService is called by the driver (schedule) when a new task93// is being scheduled on this worker.94func (wk *Worker) InvokeService(args serverless.RPCArgs, _ *struct{}) error {95	serverless.Debug("worker InvokeService: %s\n", args.Name)96	svc, ok := serviceMap[args.Name]97	if !ok {98		msg := fmt.Sprintf("Unknown service in call to InvokeService: %s\n", args.Name)99		serverless.Debug(msg)100		return fmt.Errorf(msg)101	}102	svc.interf.DoService(args.Args)103	return nil104}105// Shutdown is called by the driver when all work has been completed.106// No response needed.107func (wk *Worker) Shutdown(_ *struct{}, _ *struct{}) error {108	serverless.Debug("Worker shutdown %s\n", wk.address)109	close(wk.shutdown)110	wk.l.Close()111	return nil112}113// Tell the driver I exist and ready to work:114// register is the internal function that calls the RPC method of Driver.Register115// at the remote driver to register the worker itself.116func (wk *Worker) register(driver string) {117	args := new(serverless.WorkerRegisterArgs)118	args.WorkerAddr = wk.address119	ok := serverless.Call(driver, "Driver.Register", args, new(struct{}))120	if ok == true {121		fmt.Printf("Successfully registered worker %s\n", wk.address)122	} else {123		fmt.Printf("Failed to register worker %s\n", wk.address)124	}125}126// startRPCServer sets up a connection with the driver, registers its address,127// and waits for any of the following two events:128// 1) plugin Services to be registered,129// 2) tasks to be scheduled.130func (wk *Worker) startRPCServer() {131	rpcs := rpc.NewServer()132	rpcs.Register(wk)133	l, err := net.Listen("tcp", wk.address)134	if err != nil {135		log.Fatal("Worker: worker listen error: ", err)136	}137	wk.l = l138	defer wk.l.Close()139	wk.register(wk.masterAddr)140	// DON'T MODIFY CODE BELOW141	serverless.Debug("Worker: %v To start the RPC server...\n", wk.address)142loop:143	for {144		select {145		case <-wk.shutdown:146			break loop147		default:148		}149		wk.Lock()150		if wk.nRPC == 0 {151			wk.Unlock()152			break153		}154		wk.Unlock()155		conn, err := wk.l.Accept()156		if err == nil {157			wk.Lock()158			wk.nRPC--159			wk.Unlock()160			go rpcs.ServeConn(conn)161			wk.Lock()162			wk.nTasks++163			wk.Unlock()164		} else {165			break166		}167	}168	serverless.Debug("Worker: %v RPC server exist\n", wk.address)169}170// The main entrance of worker.go171func main() {172	wk := new(Worker)173	wk.address = os.Args[1]               // the 1st cmd-line argument: worker hostname and ip addr174	wk.masterAddr = os.Args[2]            // the 2nd cmd-line argument: driver hostname and ip addr175	nRPC, err := strconv.Atoi(os.Args[3]) // the 3rd cmd-line argument: number of RPC requests176	if err != nil {177		log.Fatal("strconv.Atoi failed")178	}179	wk.nRPC = nRPC180	wk.shutdown = make(chan struct{})181	wk.nTasks = 0182	wk.startRPCServer()183}...

schedule.go

Source:schedule.go

...34	// Make, for example, serviceName "wc", and phase "Map", into35	// a valid service, like, for example, "wcm_service".36	pluginName := ServiceName(serviceName, phase)37	// The jobChan is a queue of jobs to be exected. Allows failed jobs to38	// be requeued by invokeService when they fail39	var nTasks int40	var jobChan chan *MapReduceArgs41	Debug("Driver: Creating jobs\n")42	if phase == mapPhase {43		nTasks = len(drv.inFiles)44		jobChan = make(chan *MapReduceArgs, nTasks)45		for i, fileName := range drv.inFiles {46			arg := new(MapReduceArgs)47			arg.TaskNum = i48			arg.JobName = serviceName49			arg.InFile = fileName50			arg.NReduce = drv.nReduce51			arg.SampleKeys = drv.sampleKeys52			jobChan <- arg53		}54	} else {55		nTasks = drv.nReduce56		jobChan = make(chan *MapReduceArgs, nTasks)57		for i := 0; i < nTasks; i++ {58			arg := new(MapReduceArgs)59			arg.TaskNum = i60			arg.JobName = serviceName61			arg.NReduce = drv.nReduce62			arg.NOthers = len(drv.inFiles)63			arg.SampleKeys = drv.sampleKeys64			jobChan <- arg65		}66	}67	Debug("Driver: Creating jobs\n")68	// readyChan is a bounded buffer that is used to notify the69	// scheduler of workers that are *TRULY* ready for executing the70	// service tasks.71	readyChan := make(chan string, nTasks)72	// Complete chan allow main thread to know73	// when all workers have finished.74	completeChan := make(chan bool, nTasks)75	// invokeService is a goroutine that is used to call the RPC76	// method of Worker.InvokeService at the worker side.77	invokeService := func(worker string, args *MapReduceArgs) {78		var buf bytes.Buffer79		enc := gob.NewEncoder(&buf)80		err := enc.Encode(args)81		checkError(err)82		rpc_args := new(RPCArgs)83		rpc_args.Name = pluginName84		rpc_args.Args = buf.Bytes()85		success := Call(worker, "Worker.InvokeService", rpc_args, new(struct{}))86		// If success, then put the worker back in the queue, and report the task done.87		if success {88			// Notify the scheduler that this worker is back to ready state.89			readyChan <- worker90			// Notify scheduler that this task is complete.91			completeChan <- true92		} else {93			// Job failed, so put job back in queue to be executed94			jobChan <- args95			log.Printf("Schedule: task failed to execute by %v: %v\n", worker, args.TaskNum)96		}97	}98	// Get new workers, or ones ready for99	// more work, and assign tasks to them.100	runner := func() {101		Debug("Driver: Job runner waiting for jobs\n")102		// wait for a job103		for arg := range jobChan {104			Debug("Driver: Job runner got job\n")105			var worker string106			// assign107			select {108			case worker = <-registerChan:109				go invokeService(worker, arg)110			case worker = <-readyChan:111				go invokeService(worker, arg)112			}113		}114	}115	Debug("Driver: starting runner\n")116	go runner()117	// Wait for all tasks to complete before returning118	Debug("Driver: Waiting for tasks to be complete\n")119	for i := 0; i < nTasks; i++ {120		<-completeChan121	}122	// Work done: finish the task scheduling123	Debug("Driver: Task scheduling done\n")124}...

main.go

Source:main.go

1package main2import (3	"log"4	"net"5	"net/http"6	"os"7	"github.com/gin-gonic/gin"8	"github.com/mchmarny/gcputil/env"9	"go.opencensus.io/plugin/ochttp"10	"go.opencensus.io/trace"11	dapr "github.com/mchmarny/godapr/v1"12)13const (14	traceExporterNotSet = "trace-not-set"15)16var (17	logger = log.New(os.Stdout, "PROCESSOR == ", 0)18	// AppVersion will be overritten during build19	AppVersion = "v0.0.1-default"20	// service21	servicePort = env.MustGetEnvVar("PORT", "8081")22	// dapr23	daprClient Client24	// test client against local interace25	_ = Client(dapr.NewClient())26	stateStore   = env.MustGetEnvVar("PROCESSOR_STATE_STORE_NAME", "tweet-store")27	eventTopic   = env.MustGetEnvVar("PROCESSOR_PUBSUB_TOPIC_NAME", "processed")28	scoreService = env.MustGetEnvVar("PROCESSOR_SCORE_SERVICE_NAME", "sentimenter")29	scoreMethod  = env.MustGetEnvVar("PROCESSOR_SCORE_METHOD_NAME", "score")30	exporterURL  = env.MustGetEnvVar("TRACE_EXPORTER_URL", traceExporterNotSet)31)32func main() {33	gin.SetMode(gin.ReleaseMode)34	daprClient = dapr.NewClient()35	// router36	r := gin.New()37	r.Use(gin.Recovery())38	r.Use(Options)39	// simple routes40	r.GET("/", defaultHandler)41	r.POST("/tweets", tweetHandler)42	// server43	hostPort := net.JoinHostPort("0.0.0.0", servicePort)44	logger.Printf("Server (%s) starting: %s \n", AppVersion, hostPort)45	if err := http.ListenAndServe(hostPort, &ochttp.Handler{Handler: r}); err != nil {46		logger.Fatalf("server error: %v", err)47	}48}49// Options midleware50func Options(c *gin.Context) {51	if c.Request.Method != "OPTIONS" {52		c.Next()53	} else {54		c.Header("Access-Control-Allow-Origin", "*")55		c.Header("Access-Control-Allow-Methods", "POST,OPTIONS")56		c.Header("Access-Control-Allow-Headers", "authorization, origin, content-type, accept")57		c.Header("Allow", "POST,OPTIONS")58		c.Header("Content-Type", "application/json")59		c.AbortWithStatus(http.StatusOK)60	}61}62// Client is the minim client support for testing63type Client interface {64	SaveState(ctx trace.SpanContext, store, key string, data interface{}) error65	InvokeService(ctx trace.SpanContext, service, method string, data interface{}) (out []byte, err error)66	Publish(ctx trace.SpanContext, topic string, data interface{}) error67}...

invokeService

Using AI Code Generation

1import (2func main() {3	client := plugin.NewClient(&plugin.ClientConfig{4		Cmd:              exec.Command("C:\\Users\\admin\\Desktop\\go\\src\\plugin\\plugin.exe"),5		AllowedProtocols: []plugin.Protocol{plugin.ProtocolGRPC},6	})7	rpcClient, err := client.Client()8	if err != nil {9		panic(err)10	}11	raw, err := rpcClient.Dispense("greeter")12	if err != nil {13		panic(err)14	}15	greeter := raw.(Greeter)16	fmt.Println(greeter.Greet("Plugin"))17}18import (19type Greeter interface {20	Greet(string) string21}22type GreeterImpl struct{}23func (g *GreeterImpl) Greet(name string) string {24	return fmt.Sprintf("Hello, %s", name)25}26func (g *GreeterImpl) InvokeService() string {27}28type GreeterPlugin struct {29}30var Handshake = plugin.HandshakeConfig{31}32var pluginMap = map[string]plugin.Plugin{33	"greeter": &GreeterPlugin{Impl: &GreeterImpl{}},34}35func (p *GreeterPlugin) Server(*plugin.MuxBroker) (interface{}, error) {

invokeService

Using AI Code Generation

1import (2func main() {3	client := plugin.NewClient(&plugin.ClientConfig{4		Plugins:          map[string]plugin.Plugin{5			"greeter": &GreeterPlugin{},6		},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		panic(err)13	}14	raw, err := rpcClient.Dispense("greeter")15	if err != nil {16		panic(err)17	}18	greeter := raw.(Greeter)19	fmt.Println(greeter.Greet("World"))20}21import (22type GreeterImpl struct{}23func (g *GreeterImpl) Greet(name string) string {24	return fmt.Sprintf("Hello %s", name)25}26func main() {27	plugin.Serve(&plugin.ServeConfig{28		Plugins: map[string]plugin.Plugin{29			"greeter": &GreeterPlugin{Impl: &GreeterImpl{}},30		},31	})32}33import (34type HandshakeConfig struct {35}36type Plugin interface {37	PluginInfo() *PluginInfo38}39type PluginInfo struct {40}41type Greeter interface {42	Greet(name string) string43}44type GreeterPlugin struct {45}46func (g *GreeterPlugin) Server(*plugin.MuxBroker) (interface{}, error) {47}48func (g *GreeterPlugin) Client(b *plugin

invokeService

Using AI Code Generation

1import (2func main() {3	p, err := plugin.Open("plugin.so")4	if err != nil {5		panic(err)6	}7	sym, err := p.Lookup("InvokeService")8	if err != nil {9		panic(err)10	}11	invokeService := sym.(func(string) string)12	fmt.Println(invokeService("Hello"))13}

invokeService

Using AI Code Generation

1import com.appcelerator.titanium.TiApplication;2import com.appcelerator.titanium.TiContext;3import com.appcelerator.titanium.TiModule;4import com.appcelerator.titanium.TiProxy;5import com.appcelerator.titanium.TiDict;6import com.appcelerator.titanium.TiCallback;7import com.appcelerator.titanium.TiBlob;8import com.appcelerator.titanium.TiList;9import com.appcelerator.titanium.TiFile;10import com.appcelerator.titanium.util.TiConvert;11import com.appcelerator.titanium.proxy.TiViewProxy;12import com.appcelerator.titanium.view.TiUIView;13import com.appcelerator.titanium.TiBaseActivity;14import java.lang.reflect.Method;15import java.lang.reflect.InvocationTargetException;16{17	private static final String LCAT = "PluginModule";18	private static final boolean DBG = TiConfig.LOGD;19	public PluginModule(TiContext tiContext)20	{21		super(tiContext);22	}23	public void invokeService(String className, String methodName, Object[] params, TiCallback callback)24	{25		{26			Class<?> c = Class.forName(className);27			Object obj = c.newInstance();28			Method m = c.getDeclaredMethod(methodName, new Class[] {Object[].class, TiCallback.class});29			m.invoke(obj, params, callback);30		}31		catch (Exception e)32		{33			e.printStackTrace();34		}35	}36}37import com.appcelerator.titanium.TiApplication;38import com.appcelerator.titanium.TiContext;39import com.appcelerator.titanium.TiModule;40import com.appcelerator.titanium.TiProxy;41import com.appcelerator.titanium.TiDict;42import com.appcelerator.titanium.TiCallback;43import com.appcelerator.titanium.TiBlob;44import com.appcelerator.titanium.TiList;45import com.appcelerator.titanium.TiFile;46import com.appcelerator.titanium.util.TiConvert;47import com.appcelerator.titanium.proxy.TiViewProxy;48import com.appcelerator.titanium.view.TiUIView;49import com.appcelerator.titan

invokeService

Using AI Code Generation

1import com.vmware.vim25.mo.*;2import java.net.URL;3import java.net.MalformedURLException;4import java.rmi.RemoteException;5import com.vmware.vim25.*;6{

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