github.com/mattyw/juju@v0.0.0-20140610034352-732aecd63861/state/api/networker/networker.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package networker
     5  
     6  import (
     7  	"fmt"
     8  
     9  	"github.com/juju/juju/environs/network"
    10  	"github.com/juju/juju/state/api/base"
    11  	"github.com/juju/juju/state/api/params"
    12  )
    13  
    14  const networkerFacade = "Networker"
    15  
    16  // State provides access to an networker worker's view of the state.
    17  type State struct {
    18  	caller base.Caller
    19  }
    20  
    21  func (st *State) call(method string, params, result interface{}) error {
    22  	return st.caller.Call(networkerFacade, "", method, params, result)
    23  }
    24  
    25  // NewState creates a new client-side Machiner facade.
    26  func NewState(caller base.Caller) *State {
    27  	return &State{caller}
    28  }
    29  
    30  // MachineNetworkInfo returns information about networks to setup only for a single machine.
    31  func (st *State) MachineNetworkInfo(machineTag string) ([]network.Info, error) {
    32  	args := params.Entities{
    33  		Entities: []params.Entity{{Tag: machineTag}},
    34  	}
    35  	var results params.MachineNetworkInfoResults
    36  	err := st.call("MachineNetworkInfo", args, &results)
    37  	if err != nil {
    38  		// TODO: Not directly tested
    39  		return nil, err
    40  	}
    41  	if len(results.Results) != 1 {
    42  		// TODO: Not directly tested
    43  		err = fmt.Errorf("expected one result, got %d", len(results.Results))
    44  		return nil, err
    45  	}
    46  	return results.Results[0].Info, results.Results[0].Error
    47  }