vtctlclient

Documentation

Overview

Package vtctlclient contains the generic client side of the remote vtctl protocol.

Index

• func RegisterFactory(name string, factory Factory)
• func RunCommandAndWait(ctx context.Context, server string, args []string, recv func(*logutilpb.Event)) error
• func UnregisterFactoryForTest(name string)
• type Factory
• type VtctlClient
  • func New(addr string) (VtctlClient, error)

Functions

func RegisterFactory

func RegisterFactory(name string, factory Factory)

RegisterFactory allows a client implementation to register itself.

func RunCommandAndWait

func RunCommandAndWait(ctx context.Context, server string, args []string, recv func(*logutilpb.Event)) error

RunCommandAndWait executes a single command on a given vtctld and blocks until the command did return or timed out. Output from vtctld is streamed as logutilpb.Event messages which have to be consumed by the caller who has to specify a "recv" function.

func UnregisterFactoryForTest

func UnregisterFactoryForTest(name string)

UnregisterFactoryForTest allows to unregister a client implementation from the static map. This function is used by unit tests to cleanly unregister any fake implementations. This way, a test package can use the same name for different fakes and no dangling fakes are left behind in the static factories map after the test.

Types

type Factory

type Factory func(addr string) (VtctlClient, error)

Factory functions are registered by client implementations

type VtctlClient

type VtctlClient interface {
	// ExecuteVtctlCommand will execute the command remotely
	ExecuteVtctlCommand(ctx context.Context, args []string, actionTimeout time.Duration) (logutil.EventStream, error)

	// Close will terminate the connection. This object won't be
	// used after this.
	Close()
}

VtctlClient defines the interface used to send remote vtctl commands

func New

func New(addr string) (VtctlClient, error)

New allows a user of the client library to get its implementation.