github.com/axw/juju@v0.0.0-20161005053422-4bd6544d08d4/apiserver/backups/shim.go (about)

     1  // Copyright 2014 Canonical Ltd.
     2  // Licensed under the AGPLv3, see LICENCE file for details.
     3  
     4  package backups
     5  
     6  import (
     7  	"github.com/juju/errors"
     8  	"github.com/juju/juju/apiserver/common"
     9  	"github.com/juju/juju/apiserver/facade"
    10  	"github.com/juju/juju/state"
    11  )
    12  
    13  // This file contains untested shims to let us wrap state in a sensible
    14  // interface and avoid writing tests that depend on mongodb. If you were
    15  // to change any part of it so that it were no longer *obviously* and
    16  // *trivially* correct, you would be Doing It Wrong.
    17  
    18  func init() {
    19  	common.RegisterStandardFacade("Backups", 1, newAPI)
    20  }
    21  
    22  type stateShim struct {
    23  	*state.State
    24  }
    25  
    26  // MachineSeries implements backups.Backend
    27  func (s *stateShim) MachineSeries(id string) (string, error) {
    28  	m, err := s.State.Machine(id)
    29  	if err != nil {
    30  		return "", errors.Trace(err)
    31  	}
    32  	return m.Series(), nil
    33  }
    34  
    35  func newAPI(st *state.State, resources facade.Resources, authorizer facade.Authorizer) (*API, error) {
    36  	return NewAPI(&stateShim{st}, resources, authorizer)
    37  }