github.com/hustcat/docker@v1.3.3-0.20160314103604-901c67a8eeab/daemon/graphdriver/plugin.go (about)

     1  // +build experimental
     2  
     3  package graphdriver
     4  
     5  import (
     6  	"fmt"
     7  	"io"
     8  
     9  	"github.com/docker/docker/pkg/plugins"
    10  )
    11  
    12  type pluginClient interface {
    13  	// Call calls the specified method with the specified arguments for the plugin.
    14  	Call(string, interface{}, interface{}) error
    15  	// Stream calls the specified method with the specified arguments for the plugin and returns the response IO stream
    16  	Stream(string, interface{}) (io.ReadCloser, error)
    17  	// SendFile calls the specified method, and passes through the IO stream
    18  	SendFile(string, io.Reader, interface{}) error
    19  }
    20  
    21  func lookupPlugin(name, home string, opts []string) (Driver, error) {
    22  	pl, err := plugins.Get(name, "GraphDriver")
    23  	if err != nil {
    24  		return nil, fmt.Errorf("Error looking up graphdriver plugin %s: %v", name, err)
    25  	}
    26  	return newPluginDriver(name, home, opts, pl.Client)
    27  }
    28  
    29  func newPluginDriver(name, home string, opts []string, c pluginClient) (Driver, error) {
    30  	proxy := &graphDriverProxy{name, c}
    31  	return proxy, proxy.Init(home, opts)
    32  }