// Manifold returns a dependency manifold that runs an upgrader
// worker, using the resource names defined in the supplied config.
func Manifold(config ManifoldConfig) dependency.Manifold {
inputs := []string{
config.AgentName,
config.APICallerName,
}
// The machine agent uses these but the unit agent doesn't.
if config.UpgradeStepsGateName != "" {
inputs = append(inputs, config.UpgradeStepsGateName)
}
if config.UpgradeCheckGateName != "" {
inputs = append(inputs, config.UpgradeCheckGateName)
}
return dependency.Manifold{
Inputs: inputs,
Start: func(context dependency.Context) (worker.Worker, error) {
var agent agent.Agent
if err := context.Get(config.AgentName, &agent); err != nil {
return nil, err
}
currentConfig := agent.CurrentConfig()
var apiCaller base.APICaller
if err := context.Get(config.APICallerName, &apiCaller); err != nil {
return nil, err
}
upgraderFacade := upgrader.NewState(apiCaller)
var upgradeStepsWaiter gate.Waiter
if config.UpgradeStepsGateName == "" {
upgradeStepsWaiter = gate.NewLock()
} else {
if config.PreviousAgentVersion == version.Zero {
return nil, errors.New("previous agent version not specified")
}
if err := context.Get(config.UpgradeStepsGateName, &upgradeStepsWaiter); err != nil {
return nil, err
}
}
var initialCheckUnlocker gate.Unlocker
if config.UpgradeCheckGateName == "" {
initialCheckUnlocker = gate.NewLock()
} else {
if err := context.Get(config.UpgradeCheckGateName, &initialCheckUnlocker); err != nil {
return nil, err
}
}
return NewAgentUpgrader(
upgraderFacade,
currentConfig,
config.PreviousAgentVersion,
upgradeStepsWaiter,
initialCheckUnlocker,
)
},
}
}
// Upgrader returns access to the Upgrader API
func (st *State) Upgrader() *upgrader.State {
return upgrader.NewState(st)
}
// Note: This is really meant as a unit-test, this isn't a test that should
// need all of the setup we have for this test suite
func (s *machineUpgraderSuite) TestNew(c *gc.C) {
upgrader := upgrader.NewState(s.stateAPI)
c.Assert(upgrader, gc.NotNil)
}
"github.com/juju/juju/worker/util"
)
// ManifoldConfig defines the names of the manifolds on which a
// Manifold will depend.
type ManifoldConfig util.AgentApiManifoldConfig
// Manifold returns a dependency manifold that runs an upgrader
// worker, using the resource names defined in the supplied config.
func Manifold(config ManifoldConfig) dependency.Manifold {
return util.AgentApiManifold(util.AgentApiManifoldConfig(config), newWorker)
}
// newWorker wraps NewUpgrader for the convenience of AgentApiManifold. It should
// eventually replace NewUpgrader.
var newWorker = func(agent agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
currentConfig := agent.CurrentConfig()
upgraderFacade := upgrader.NewState(apiCaller)
return NewAgentUpgrader(
upgraderFacade,
currentConfig,
// TODO(fwereade): surely we shouldn't need both currentConfig
// *and* currentConfig.UpgradedToVersion?
currentConfig.UpgradedToVersion(),
// TODO(fwereade): these are unit-agent-specific, and very much
// unsuitable for use in a machine agent.
func() bool { return false },
make(chan struct{}),
), nil
}