Golang confab.Controller類代碼示例

func start(flagSet *flag.FlagSet, path string, controller confab.Controller, agentClient *confab.AgentClient) {
	timeout := confab.NewTimeout(time.After(time.Duration(controller.Config.Confab.TimeoutInSeconds) * time.Second))

	_, err := os.Stat(controller.Config.Path.ConsulConfigDir)
	if err != nil {
		printUsageAndExit(fmt.Sprintf("\"consul_config_dir\" %q could not be found",
			controller.Config.Path.ConsulConfigDir), flagSet)
	}

	if len(agentClient.ExpectedMembers) == 0 {
		printUsageAndExit("at least one \"expected-member\" must be provided", flagSet)
	}

	err = controller.WriteServiceDefinitions()
	if err != nil {
		stderr.Printf("error writing service definitions: %s", err)
		os.Exit(1)
	}

	err = controller.BootAgent(timeout)
	if err != nil {
		stderr.Printf("error booting consul agent: %s", err)

		// DO NOT call StopAgent:
		//   - the agent may aleady be running
		//   - the pidfile may contain the PID of another running process
		os.Exit(1)
	}

	if controller.Config.Consul.Agent.Server {
		configureServer(controller, agentClient, timeout)
	} else {
		configureClient(controller)
	}
}

func stop(path string, controller confab.Controller, agentClient *agent.Client) {
	rpcClient, err := consulagent.NewRPCClient("localhost:8400")
	if err != nil {
		stderr.Printf("error connecting to RPC server: %s", err)
		exit(controller, 1)
	}

	agentClient.ConsulRPCClient = &agent.RPCClient{*rpcClient}
	stderr.Printf("stopping agent")
	controller.StopAgent()
	stderr.Printf("stopped agent")
}

func configureServer(controller confab.Controller, agentClient *agent.Client, timeout confab.Timeout) {
	rpcClient, err := consulagent.NewRPCClient("localhost:8400")

	if err != nil {
		stderr.Printf("error connecting to RPC server: %s", err)
		exit(controller, 1)
	}

	agentClient.ConsulRPCClient = &agent.RPCClient{*rpcClient}
	err = controller.ConfigureServer(timeout)
	if err != nil {
		stderr.Printf("error configuring server: %s", err)
		exit(controller, 1)
	}
}

func start(flagSet *flag.FlagSet, path string, controller confab.Controller, agentClient *agent.Client) {
	timeout := confab.NewTimeout(time.After(time.Duration(controller.Config.Confab.TimeoutInSeconds) * time.Second))

	_, err := os.Stat(controller.Config.Path.ConsulConfigDir)
	if err != nil {
		printUsageAndExit(fmt.Sprintf("\"consul_config_dir\" %q could not be found",
			controller.Config.Path.ConsulConfigDir), flagSet)
	}

	if len(agentClient.ExpectedMembers) == 0 {
		printUsageAndExit("at least one \"expected-member\" must be provided", flagSet)
	}

	err = controller.WriteConsulConfig()
	if err != nil {
		stderr.Printf("error writing consul config file: %s", err)
		os.Exit(1)
	}

	err = controller.WriteServiceDefinitions()
	if err != nil {
		stderr.Printf("error writing service definitions: %s", err)
		os.Exit(1)
	}

	err = controller.BootAgent(timeout)
	if err != nil {
		stderr.Printf("error booting consul agent: %s", err)
		exit(controller, 1)
	}

	if controller.Config.Consul.Agent.Mode == "server" {
		configureServer(controller, agentClient, timeout)
	} else {
		configureClient(controller)
	}
}

func main() {
	flagSet := flag.NewFlagSet("flags", flag.ContinueOnError)
	flagSet.BoolVar(&isServer, "server", false, "whether to start the agent in server mode")
	flagSet.StringVar(&agentPath, "agent-path", "", "path to the on-filesystem consul `executable`")
	flagSet.StringVar(&consulConfigDir, "consul-config-dir", "", "path to consul configuration `directory`")
	flagSet.StringVar(&pidFile, "pid-file", "", "path to consul PID `file`")
	flagSet.Var(&expectedMembers, "expected-member", "address `list` of the expected members")
	flagSet.Var(&encryptionKeys, "encryption-key", "`key` used to encrypt consul traffic")

	if len(os.Args) < 2 {
		printUsageAndExit("invalid number of arguments", flagSet)
	}

	command := os.Args[1]
	if !validCommand(command) {
		printUsageAndExit(fmt.Sprintf("invalid COMMAND %q", command), flagSet)
	}

	flagSet.Parse(os.Args[2:])

	path, err := exec.LookPath(agentPath)
	if err != nil {
		printUsageAndExit(fmt.Sprintf("\"agent-path\" %q cannot be found", agentPath), flagSet)
	}

	if len(pidFile) == 0 {
		printUsageAndExit("\"pid-file\" cannot be empty", flagSet)
	}

	if command == "start" {
		_, err = os.Stat(consulConfigDir)
		if err != nil {
			printUsageAndExit(fmt.Sprintf("\"consul-config-dir\" %q could not be found", consulConfigDir), flagSet)
		}

		if len(expectedMembers) == 0 {
			printUsageAndExit("at least one \"expected-member\" must be provided", flagSet)
		}

		agentRunner := confab.AgentRunner{
			Path:      path,
			PIDFile:   pidFile,
			ConfigDir: consulConfigDir,
			Stdout:    os.Stdout,
			Stderr:    os.Stderr,
		}
		consulAPIClient, err := api.NewClient(api.DefaultConfig())
		if err != nil {
			panic(err) // not tested, NewClient never errors
		}

		agentClient := confab.AgentClient{
			ExpectedMembers: expectedMembers,
			ConsulAPIAgent:  consulAPIClient.Agent(),
			ConsulRPCClient: nil,
		}

		controller := confab.Controller{
			AgentRunner:    &agentRunner,
			AgentClient:    &agentClient,
			MaxRetries:     10,
			SyncRetryDelay: 1 * time.Second,
			SyncRetryClock: clock.NewClock(),
			EncryptKeys:    encryptionKeys,
			SSLDisabled:    false,
			Logger:         stdout,
		}

		err = controller.BootAgent()
		if err != nil {
			stderr.Printf("error booting consul agent: %s", err)
			os.Exit(1)
		}

		if !isServer {
			return
		}
		rpcClient, err := agent.NewRPCClient("localhost:8400")
		if err != nil {
			stderr.Printf("error connecting to RPC server: %s", err)
			os.Exit(1)
		}
		agentClient.ConsulRPCClient = &confab.RPCClient{
			*rpcClient,
		}

		err = controller.ConfigureServer()
		if err != nil {
			stderr.Printf("error connecting to RPC server: %s", err)
			os.Exit(1) // not tested; it is challenging with the current fake agent.
		}
	}

	if command == "stop" {
		agentRunner := confab.AgentRunner{
			Path:      path,
			PIDFile:   pidFile,
			ConfigDir: "",
			Stdout:    os.Stdout,
			Stderr:    os.Stderr,
//.........這裏部分代碼省略.........

	"bytes"
	"confab"
	"confab/fakes"
	"errors"
	"log"
	"time"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
)

var _ = Describe("controller", func() {
	var (
		clock       *fakes.Clock
		agentRunner *fakes.AgentRunner
		agentClient *fakes.AgentClient
		controller  confab.Controller
		logBuffer   *bytes.Buffer
	)

	BeforeEach(func() {
		clock = &fakes.Clock{}

		agentClient = &fakes.AgentClient{}
		agentClient.VerifyJoinedCalls.Returns.Errors = []error{nil}
		agentClient.VerifySyncedCalls.Returns.Errors = []error{nil}

		agentRunner = &fakes.AgentRunner{}
		agentRunner.RunCalls.Returns.Errors = []error{nil}

		logBuffer = &bytes.Buffer{}

	"confab"
	"confab/fakes"
	"errors"
	"time"

	"github.com/pivotal-golang/lager"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
)

var _ = Describe("Controller", func() {
	var (
		clock          *fakes.Clock
		agentRunner    *fakes.AgentRunner
		agentClient    *fakes.AgentClient
		controller     confab.Controller
		logger         *fakes.Logger
		serviceDefiner *fakes.ServiceDefiner
	)

	BeforeEach(func() {
		clock = &fakes.Clock{}
		logger = &fakes.Logger{}

		agentClient = &fakes.AgentClient{}
		agentClient.VerifyJoinedCalls.Returns.Errors = []error{nil}
		agentClient.VerifySyncedCalls.Returns.Errors = []error{nil}

		agentRunner = &fakes.AgentRunner{}
		agentRunner.RunCalls.Returns.Errors = []error{nil}

func exit(controller confab.Controller, code int) {
	controller.StopAgent()
	os.Exit(code)
}

func configureClient(controller confab.Controller) {
	if err := controller.ConfigureClient(); err != nil {
		stderr.Printf("error configuring client: %s", err)
		exit(controller, 1)
	}
}