说明
golang cause示例是从最受好评的开源项目中提取的实现代码，你可以参考下面示例的使用方式。
编程语言: Golang
命名空间/包名称: github.com/juju/errors
示例#1
文件：
local_test.go
项目：
pmatulis/juju
func (t *localServerSuite) TestAllocateAddressFailureToFindNetworkInterface(c *gc.C) {
env := t.prepareEnviron(c)
err := bootstrap.Bootstrap(envtesting.BootstrapContext(c), env, bootstrap.BootstrapParams{})
c.Assert(err, jc.ErrorIsNil)
instanceIds, err := env.StateServerInstances()
c.Assert(err, jc.ErrorIsNil)
instId := instanceIds[0]
addr := network.Address{Value: "8.0.0.4"}
// Invalid instance found
err = env.AllocateAddress(instId+"foo", "", &addr, "foo", "bar")
c.Assert(err, gc.ErrorMatches, ".*InvalidInstanceID.NotFound.*")
// No network interface
err = env.AllocateAddress(instId, "", &addr, "foo", "bar")
c.Assert(errors.Cause(err), gc.ErrorMatches, "unexpected AWS response: network interface not found")
// Nil or empty address given.
err = env.AllocateAddress(instId, "", nil, "foo", "bar")
c.Assert(errors.Cause(err), gc.ErrorMatches, "invalid address: nil or empty")
err = env.AllocateAddress(instId, "", &network.Address{Value: ""}, "foo", "bar")
c.Assert(errors.Cause(err), gc.ErrorMatches, "invalid address: nil or empty")
}示例#2
文件：
resolver.go
项目：
bac/juju
func (s *uniterResolver) nextOp(
localState resolver.LocalState,
remoteState remotestate.Snapshot,
opFactory operation.Factory,
) (operation.Operation, error) {
switch remoteState.Life {
case params.Alive:
case params.Dying:
// Normally we handle relations last, but if we're dying we
// must ensure that all relations are broken first.
op, err := s.config.Relations.NextOp(localState, remoteState, opFactory)
if errors.Cause(err) != resolver.ErrNoOperation {
return op, err
}
// We're not in a hook error and the unit is Dying,
// so we should proceed to tear down.
//
// TODO(axw) move logic for cascading destruction of
// subordinates, relation units and storage
// attachments into state, via cleanups.
if localState.Started {
return opFactory.NewRunHook(hook.Info{Kind: hooks.Stop})
}
fallthrough
case params.Dead:
// The unit is dying/dead and stopped, so tell the uniter
// to terminate.
return nil, resolver.ErrTerminate
}
// Now that storage hooks have run at least once, before anything else,
// we need to run the install hook.
// TODO(cmars): remove !localState.Started. It's here as a temporary
// measure because unit agent upgrades aren't being performed yet.
if !localState.Installed && !localState.Started {
return opFactory.NewRunHook(hook.Info{Kind: hooks.Install})
}
if charmModified(localState, remoteState) {
return opFactory.NewUpgrade(remoteState.CharmURL)
}
if localState.ConfigVersion != remoteState.ConfigVersion {
return opFactory.NewRunHook(hook.Info{Kind: hooks.ConfigChanged})
}
op, err := s.config.Relations.NextOp(localState, remoteState, opFactory)
if errors.Cause(err) != resolver.ErrNoOperation {
return op, err
}
// UpdateStatus hook runs if nothing else needs to.
if localState.UpdateStatusVersion != remoteState.UpdateStatusVersion {
return opFactory.NewRunHook(hook.Info{Kind: hooks.UpdateStatus})
}
return nil, resolver.ErrNoOperation
}示例#3
文件：
conn.go
项目：
AlexisBruemmer/juju
// newState returns a new State that uses the given environment.
// The environment must have already been bootstrapped.
func newState(environ environs.Environ, mongoInfo *mongo.MongoInfo) (*state.State, error) {
config := environ.Config()
password := config.AdminSecret()
if password == "" {
return nil, fmt.Errorf("cannot connect without admin-secret")
}
modelTag := names.NewModelTag(config.UUID())
mongoInfo.Password = password
opts := mongo.DefaultDialOpts()
st, err := state.Open(modelTag, mongoInfo, opts, environs.NewStatePolicy())
if errors.IsUnauthorized(errors.Cause(err)) {
// We try for a while because we might succeed in
// connecting to mongo before the state has been
// initialized and the initial password set.
for a := redialStrategy.Start(); a.Next(); {
st, err = state.Open(modelTag, mongoInfo, opts, environs.NewStatePolicy())
if !errors.IsUnauthorized(errors.Cause(err)) {
break
}
}
if err != nil {
return nil, err
}
} else if err != nil {
return nil, err
}
if err := updateSecrets(environ, st); err != nil {
st.Close()
return nil, fmt.Errorf("unable to push secrets: %v", err)
}
return st, nil
}示例#4
文件：
admin_test.go
项目：
OSBI/juju
func (s *loginSuite) TestLoginAsDeactivatedUser(c *gc.C) {
info, cleanup := s.setupServerWithValidator(c, nil)
defer cleanup()
info.Tag = nil
info.Password = ""
st, err := api.Open(info, fastDialOpts)
c.Assert(err, jc.ErrorIsNil)
defer st.Close()
password := "password"
u := s.Factory.MakeUser(c, &factory.UserParams{Password: password, Disabled: true})
_, err = st.Client().Status([]string{})
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: `unknown object type "Client"`,
Code: "not implemented",
})
// Since these are user login tests, the nonce is empty.
err = st.Login(u.Tag(), password, "")
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: "invalid entity name or password",
Code: "unauthorized access",
})
_, err = st.Client().Status([]string{})
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: `unknown object type "Client"`,
Code: "not implemented",
})
}示例#5
文件：
admin_test.go
项目：
bac/juju
func (s *loginSuite) TestLoginAsDeactivatedUser(c *gc.C) {
info, srv := newServer(c, s.State)
defer assertStop(c, srv)
info.ModelTag = s.State.ModelTag()
st := s.openAPIWithoutLogin(c, info)
password := "password"
u := s.Factory.MakeUser(c, &factory.UserParams{Password: password, Disabled: true})
_, err := st.Client().Status([]string{})
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: `unknown object type "Client"`,
Code: "not implemented",
})
// Since these are user login tests, the nonce is empty.
err = st.Login(u.Tag(), password, "", nil)
assertInvalidEntityPassword(c, err)
_, err = st.Client().Status([]string{})
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: `unknown object type "Client"`,
Code: "not implemented",
})
}示例#6
文件：
kill.go
项目：
kat-co/juju
// Run implements Command.Run
func (c *killCommand) Run(ctx *cmd.Context) error {
controllerName := c.ControllerName()
store := c.ClientStore()
if !c.assumeYes {
if err := confirmDestruction(ctx, controllerName); err != nil {
return err
}
}
// Attempt to connect to the API.
api, err := c.getControllerAPI()
switch {
case err == nil:
defer api.Close()
case errors.Cause(err) == common.ErrPerm:
return errors.Annotate(err, "cannot destroy controller")
default:
if errors.Cause(err) != modelcmd.ErrConnTimedOut {
logger.Debugf("unable to open api: %s", err)
}
ctx.Infof("Unable to open API: %s\n", err)
api = nil
}
// Obtain controller environ so we can clean up afterwards.
controllerEnviron, err := c.getControllerEnviron(ctx, store, controllerName, api)
if err != nil {
return errors.Annotate(err, "getting controller environ")
}
// If we were unable to connect to the API, just destroy the controller through
// the environs interface.
if api == nil {
ctx.Infof("Unable to connect to the API server. Destroying through provider.")
return environs.Destroy(controllerName, controllerEnviron, store)
}
// Attempt to destroy the controller and all environments.
err = api.DestroyController(true)
if err != nil {
ctx.Infof("Unable to destroy controller through the API: %s. Destroying through provider.", err)
return environs.Destroy(controllerName, controllerEnviron, store)
}
ctx.Infof("Destroying controller %q\nWaiting for resources to be reclaimed", controllerName)
updateStatus := newTimedStatusUpdater(ctx, api, controllerEnviron.Config().UUID())
for ctrStatus, envsStatus := updateStatus(0); hasUnDeadModels(envsStatus); ctrStatus, envsStatus = updateStatus(2 * time.Second) {
ctx.Infof(fmtCtrStatus(ctrStatus))
for _, envStatus := range envsStatus {
ctx.Verbosef(fmtModelStatus(envStatus))
}
}
ctx.Infof("All hosted models reclaimed, cleaning up controller machines")
return environs.Destroy(controllerName, controllerEnviron, store)
}示例#7
文件：
admin_test.go
项目：
AlexisBruemmer/juju
func (s *loginSuite) TestBadLogin(c *gc.C) {
// Start our own server so we can control when the first login
// happens. Otherwise in JujuConnSuite.SetUpTest api.Open is
// called with user-admin permissions automatically.
info, cleanup := s.setupServerWithValidator(c, nil)
defer cleanup()
adminUser := s.AdminUserTag(c)
for i, t := range []struct {
tag names.Tag
password string
err error
code string
}{{
tag: adminUser,
password: "wrong password",
err: &rpc.RequestError{
Message: "invalid entity name or password",
Code: "unauthorized access",
},
code: params.CodeUnauthorized,
}, {
tag: names.NewUserTag("unknown"),
password: "password",
err: &rpc.RequestError{
Message: "invalid entity name or password",
Code: "unauthorized access",
},
code: params.CodeUnauthorized,
}} {
c.Logf("test %d; entity %q; password %q", i, t.tag, t.password)
func() {
// Open the API without logging in, so we can perform
// operations on the connection before calling Login.
st := s.openAPIWithoutLogin(c, info)
defer st.Close()
_, err := apimachiner.NewState(st).Machine(names.NewMachineTag("0"))
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: `unknown object type "Machiner"`,
Code: "not implemented",
})
// Since these are user login tests, the nonce is empty.
err = st.Login(t.tag, t.password, "", nil)
c.Assert(errors.Cause(err), gc.DeepEquals, t.err)
c.Assert(params.ErrCode(err), gc.Equals, t.code)
_, err = apimachiner.NewState(st).Machine(names.NewMachineTag("0"))
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: `unknown object type "Machiner"`,
Code: "not implemented",
})
}()
}
}示例#8
文件：
restore.go
项目：
ktsakalozos/juju
func rebootstrap(cfg *config.Config, ctx *cmd.Context, cons constraints.Value) (environs.Environ, error) {
progress("re-bootstrapping environment")
// Turn on safe mode so that the newly bootstrapped instance
// will not destroy all the instances it does not know about.
cfg, err := cfg.Apply(map[string]interface{}{
"provisioner-safe-mode": true,
})
if err != nil {
return nil, errors.Annotate(err, "cannot enable provisioner-safe-mode")
}
env, err := environs.New(cfg)
if err != nil {
return nil, err
}
instanceIds, err := env.StateServerInstances()
switch errors.Cause(err) {
case nil, environs.ErrNoInstances:
// Some providers will return a nil error even
// if there are no live state server instances.
break
case environs.ErrNotBootstrapped:
return nil, errors.Trace(err)
default:
return nil, errors.Annotate(err, "cannot determine state server instances")
}
if len(instanceIds) > 0 {
instances, err := env.Instances(instanceIds)
switch errors.Cause(err) {
case nil, environs.ErrPartialInstances:
return nil, fmt.Errorf("old bootstrap instances %q still seems to exist; will not replace", instances)
case environs.ErrNoInstances:
// No state server instances, so keep running.
break
default:
return nil, errors.Annotate(err, "cannot detect whether old instance is still running")
}
}
// Remove the storage so that we can bootstrap without the provider complaining.
if env, ok := env.(environs.EnvironStorage); ok {
if err := env.Storage().Remove(common.StateFile); err != nil {
return nil, errors.Annotate(err, fmt.Sprintf("cannot remove %q from storage", common.StateFile))
}
}
// TODO If we fail beyond here, then we won't have a state file and
// we won't be able to re-run this script because it fails without it.
// We could either try to recreate the file if we fail (which is itself
// error-prone) or we could provide a --no-check flag to make
// it go ahead anyway without the check.
args := bootstrap.BootstrapParams{Constraints: cons}
if err := bootstrap.Bootstrap(envcmd.BootstrapContextNoVerify(ctx), env, args); err != nil {
return nil, errors.Annotate(err, "cannot bootstrap new instance")
}
return env, nil
}示例#9
文件：
controller.go
项目：
bac/juju
// WaitForAgentInitialisation polls the bootstrapped controller with a read-only
// command which will fail until the controller is fully initialised.
// TODO(wallyworld) - add a bespoke command to maybe the admin facade for this purpose.
func WaitForAgentInitialisation(ctx *cmd.Context, c *modelcmd.ModelCommandBase, controllerName, hostedModelName string) error {
// TODO(katco): 2016-08-09: lp:1611427
attempts := utils.AttemptStrategy{
Min: bootstrapReadyPollCount,
Delay: bootstrapReadyPollDelay,
}
var (
apiAttempts int
err error
)
// Make a best effort to find the new controller address so we can print it.
addressInfo := ""
controller, err := c.ClientStore().ControllerByName(controllerName)
if err == nil && len(controller.APIEndpoints) > 0 {
addr, err := network.ParseHostPort(controller.APIEndpoints[0])
if err == nil {
addressInfo = fmt.Sprintf(" at %s", addr.Address.Value)
}
}
ctx.Infof("Contacting Juju controller%s to verify accessibility...", addressInfo)
apiAttempts = 1
for attempt := attempts.Start(); attempt.Next(); apiAttempts++ {
err = tryAPI(c)
if err == nil {
ctx.Infof("Bootstrap complete, %q controller now available.", controllerName)
ctx.Infof("Controller machines are in the %q model.", bootstrap.ControllerModelName)
ctx.Infof("Initial model %q added.", hostedModelName)
break
}
// As the API server is coming up, it goes through a number of steps.
// Initially the upgrade steps run, but the api server allows some
// calls to be processed during the upgrade, but not the list blocks.
// Logins are also blocked during space discovery.
// It is also possible that the underlying database causes connections
// to be dropped as it is initialising, or reconfiguring. These can
// lead to EOF or "connection is shut down" error messages. We skip
// these too, hoping that things come back up before the end of the
// retry poll count.
errorMessage := errors.Cause(err).Error()
switch {
case errors.Cause(err) == io.EOF,
strings.HasSuffix(errorMessage, "connection is shut down"),
strings.HasSuffix(errorMessage, "no api connection available"),
strings.Contains(errorMessage, "spaces are still being discovered"):
ctx.Verbosef("Still waiting for API to become available")
continue
case params.ErrCode(err) == params.CodeUpgradeInProgress:
ctx.Verbosef("Still waiting for API to become available: %v", err)
continue
}
break
}
return errors.Annotatef(err, "unable to contact api server after %d attempts", apiAttempts)
}示例#10
文件：
kill.go
项目：
bac/juju
// Run implements Command.Run
func (c *killCommand) Run(ctx *cmd.Context) error {
controllerName := c.ControllerName()
store := c.ClientStore()
if !c.assumeYes {
if err := confirmDestruction(ctx, controllerName); err != nil {
return err
}
}
// Attempt to connect to the API.
api, err := c.getControllerAPI()
switch {
case err == nil:
defer api.Close()
case errors.Cause(err) == common.ErrPerm:
return errors.Annotate(err, "cannot destroy controller")
default:
if errors.Cause(err) != modelcmd.ErrConnTimedOut {
logger.Debugf("unable to open api: %s", err)
}
ctx.Infof("Unable to open API: %s\n", err)
api = nil
}
// Obtain controller environ so we can clean up afterwards.
controllerEnviron, err := c.getControllerEnviron(ctx, store, controllerName, api)
if err != nil {
return errors.Annotate(err, "getting controller environ")
}
// If we were unable to connect to the API, just destroy the controller through
// the environs interface.
if api == nil {
ctx.Infof("Unable to connect to the API server, destroying through provider")
return environs.Destroy(controllerName, controllerEnviron, store)
}
// Attempt to destroy the controller and all environments.
err = api.DestroyController(true)
if err != nil {
ctx.Infof("Unable to destroy controller through the API: %s\nDestroying through provider", err)
return environs.Destroy(controllerName, controllerEnviron, store)
}
ctx.Infof("Destroying controller %q\nWaiting for resources to be reclaimed", controllerName)
uuid := controllerEnviron.Config().UUID()
if err := c.WaitForModels(ctx, api, uuid); err != nil {
c.DirectDestroyRemaining(ctx, api)
}
return environs.Destroy(controllerName, controllerEnviron, store)
}示例#11
文件：
utils.go
项目：
qgweb/go-hbase
// TODO: The following functions can be moved later.
// ErrorEqual returns a boolean indicating whether err1 is equal to err2.
func ErrorEqual(err1, err2 error) bool {
e1 := errors.Cause(err1)
e2 := errors.Cause(err2)
if e1 == e2 {
return true
}
if e1 == nil || e2 == nil {
return e1 == e2
}
return e1.Error() == e2.Error()
}示例#12
文件：
filesystem_ops.go
项目：
ktsakalozos/juju
// filesystemParamsBySource separates the filesystem parameters by filesystem source.
func filesystemParamsBySource(
environConfig *config.Config,
baseStorageDir string,
params []storage.FilesystemParams,
managedFilesystemSource storage.FilesystemSource,
) (map[string][]storage.FilesystemParams, map[string]storage.FilesystemSource, error) {
// TODO(axw) later we may have multiple instantiations (sources)
// for a storage provider, e.g. multiple Ceph installations. For
// now we assume a single source for each provider type, with no
// configuration.
filesystemSources := make(map[string]storage.FilesystemSource)
for _, params := range params {
sourceName := string(params.Provider)
if _, ok := filesystemSources[sourceName]; ok {
continue
}
if params.Volume != (names.VolumeTag{}) {
filesystemSources[sourceName] = managedFilesystemSource
continue
}
filesystemSource, err := filesystemSource(
environConfig, baseStorageDir, sourceName, params.Provider,
)
if errors.Cause(err) == errNonDynamic {
filesystemSource = nil
} else if err != nil {
return nil, nil, errors.Annotate(err, "getting filesystem source")
}
filesystemSources[sourceName] = filesystemSource
}
paramsBySource := make(map[string][]storage.FilesystemParams)
for _, params := range params {
sourceName := string(params.Provider)
filesystemSource := filesystemSources[sourceName]
if filesystemSource == nil {
// Ignore nil filesystem sources; this means that the
// filesystem should be created by the machine-provisioner.
continue
}
err := filesystemSource.ValidateFilesystemParams(params)
switch errors.Cause(err) {
case nil:
paramsBySource[sourceName] = append(paramsBySource[sourceName], params)
default:
return nil, nil, errors.Annotatef(err, "invalid parameters for filesystem %s", params.Tag.Id())
}
}
return paramsBySource, filesystemSources, nil
}示例#13
文件：
local_test.go
项目：
claudiu-coblis/juju
func (t *localServerSuite) TestAllocateAddressIPAddressInUseOrEmpty(c *gc.C) {
env, instId := t.setUpInstanceWithDefaultVpc(c)
addr := network.Address{Value: "8.0.0.4"}
mockAssign := func(ec2Inst *amzec2.EC2, netId string, addr network.Address) error {
return &amzec2.Error{Code: "InvalidParameterValue"}
}
t.PatchValue(&ec2.AssignPrivateIPAddress, mockAssign)
err := env.AllocateAddress(instId, "", addr, "foo", "bar")
c.Assert(errors.Cause(err), gc.Equals, environs.ErrIPAddressUnavailable)
err = env.AllocateAddress(instId, "", network.Address{}, "foo", "bar")
c.Assert(errors.Cause(err), gc.Equals, environs.ErrIPAddressUnavailable)
}示例#14
文件：
rpc_test.go
项目：
AlexisBruemmer/juju
func (*rpcSuite) TestTransformErrors(c *gc.C) {
root := &Root{
errorInst: &ErrorMethods{&codedError{"message", "code"}},
}
tfErr := func(err error) error {
c.Check(err, gc.NotNil)
if e, ok := err.(*codedError); ok {
return &codedError{
m: "transformed: " + e.m,
code: "transformed: " + e.code,
}
}
return fmt.Errorf("transformed: %v", err)
}
client, srvDone, _, _ := newRPCClientServer(c, root, tfErr, false)
defer closeClient(c, client, srvDone)
// First, we don't transform methods we can't find.
err := client.Call(rpc.Request{"foo", 0, "", "bar"}, nil, nil)
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: `unknown object type "foo"`,
Code: rpc.CodeNotImplemented,
})
err = client.Call(rpc.Request{"ErrorMethods", 0, "", "NoMethod"}, nil, nil)
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: "no such request - method ErrorMethods.NoMethod is not implemented",
Code: rpc.CodeNotImplemented,
})
// We do transform any errors that happen from calling the RootMethod
// and beyond.
err = client.Call(rpc.Request{"ErrorMethods", 0, "", "Call"}, nil, nil)
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: "transformed: message",
Code: "transformed: code",
})
root.errorInst.err = nil
err = client.Call(rpc.Request{"ErrorMethods", 0, "", "Call"}, nil, nil)
c.Assert(err, jc.ErrorIsNil)
root.errorInst = nil
err = client.Call(rpc.Request{"ErrorMethods", 0, "", "Call"}, nil, nil)
c.Assert(errors.Cause(err), gc.DeepEquals, &rpc.RequestError{
Message: "transformed: no error methods",
})
}示例#15
文件：
status.go
项目：
claudiu-coblis/juju
// setStatus inteprets the supplied params as documented on the type.
func setStatus(st *State, params setStatusParams) (err error) {
defer errors.DeferredAnnotatef(&err, "cannot set status")
// TODO(fwereade): this can/should probably be recording the time the
// status was *set*, not the time it happened to arrive in state.
// We should almost certainly be accepting StatusInfo in the exposed
// SetStatus methods, for symetry with the Status methods.
now := time.Now().UnixNano()
doc := statusDoc{
Status: params.status,
StatusInfo: params.message,
StatusData: escapeKeys(params.rawData),
Updated: now,
}
probablyUpdateStatusHistory(st, params.globalKey, doc)
// Set the authoritative status document, or fail trying.
buildTxn := updateStatusSource(st, params.globalKey, doc)
if params.token != nil {
buildTxn = buildTxnWithLeadership(buildTxn, params.token)
}
err = st.run(buildTxn)
if cause := errors.Cause(err); cause == mgo.ErrNotFound {
return errors.NotFoundf(params.badge)
}
return errors.Trace(err)
}示例#16
文件：
relations_test.go
项目：
kat-co/juju
func (s *relationsSuite) TestNextOpNothing(c *gc.C) {
unitTag := names.NewUnitTag("wordpress/0")
abort := make(chan struct{})
var numCalls int32
unitEntity := params.Entities{Entities: []params.Entity{params.Entity{Tag: "unit-wordpress-0"}}}
apiCaller := mockAPICaller(c, &numCalls,
uniterApiCall("Life", unitEntity, params.LifeResults{Results: []params.LifeResult{{Life: params.Alive}}}, nil),
uniterApiCall("JoinedRelations", unitEntity, params.StringsResults{Results: []params.StringsResult{{Result: []string{}}}}, nil),
uniterApiCall("GetPrincipal", unitEntity, params.StringBoolResults{Results: []params.StringBoolResult{{Result: "", Ok: false}}}, nil),
)
st := uniter.NewState(apiCaller, unitTag)
r, err := relation.NewRelations(st, unitTag, s.stateDir, s.relationsDir, abort)
c.Assert(err, jc.ErrorIsNil)
assertNumCalls(c, &numCalls, 2)
localState := resolver.LocalState{
State: operation.State{
Kind: operation.Continue,
},
}
remoteState := remotestate.Snapshot{}
relationsResolver := relation.NewRelationsResolver(r)
_, err = relationsResolver.NextOp(localState, remoteState, &mockOperations{})
c.Assert(errors.Cause(err), gc.Equals, resolver.ErrNoOperation)
}示例#17
文件：
apiclient.go
项目：
bac/juju
// APICall places a call to the remote machine.
//
// This fills out the rpc.Request on the given facade, version for a given
// object id, and the specific RPC method. It marshalls the Arguments, and will
// unmarshall the result into the response object that is supplied.
func (s *state) APICall(facade string, version int, id, method string, args, response interface{}) error {
retrySpec := retry.CallArgs{
Func: func() error {
return s.client.Call(rpc.Request{
Type: facade,
Version: version,
Id: id,
Action: method,
}, args, response)
},
IsFatalError: func(err error) bool {
err = errors.Cause(err)
ec, ok := err.(hasErrorCode)
if !ok {
return true
}
return ec.ErrorCode() != params.CodeRetry
},
Delay: 100 * time.Millisecond,
MaxDelay: 1500 * time.Millisecond,
MaxDuration: 10 * time.Second,
BackoffFunc: retry.DoubleDelay,
Clock: s.clock,
}
err := retry.Call(retrySpec)
return errors.Trace(err)
}示例#18
文件：
logstream_test.go
项目：
bac/juju
func (s *LogReaderSuite) TestNextError(c *gc.C) {
cUUID := "feebdaed-2f18-4fd2-967d-db9663db7bea"
stub := &testing.Stub{}
conn := &mockConnector{stub: stub}
jsonReader := mockStream{stub: stub}
conn.ReturnConnectStream = jsonReader
failure := errors.New("an error")
stub.SetErrors(nil, failure)
var cfg params.LogStreamConfig
stream, err := logstream.Open(conn, cfg, cUUID)
c.Assert(err, gc.IsNil)
var nextErr error
done := make(chan struct{})
go func() {
_, nextErr = stream.Next()
c.Check(errors.Cause(nextErr), gc.Equals, failure)
close(done)
}()
select {
case <-done:
case <-time.After(coretesting.LongWait):
c.Errorf("timed out waiting for record")
}
stub.CheckCallNames(c, "ConnectStream", "ReadJSON")
}示例#19
文件：
machine_test.go
项目：
AlexisBruemmer/juju
func (s *machineSuite) TestEntitySetPassword(c *gc.C) {
entity, err := apiagent.NewState(s.st).Entity(s.machine.Tag())
c.Assert(err, jc.ErrorIsNil)
err = entity.SetPassword("foo")
c.Assert(err, gc.ErrorMatches, "password is only 3 bytes long, and is not a valid Agent password")
err = entity.SetPassword("foo-12345678901234567890")
c.Assert(err, jc.ErrorIsNil)
err = entity.ClearReboot()
c.Assert(err, jc.ErrorIsNil)
err = s.machine.Refresh()
c.Assert(err, jc.ErrorIsNil)
c.Assert(s.machine.PasswordValid("bar"), jc.IsFalse)
c.Assert(s.machine.PasswordValid("foo-12345678901234567890"), jc.IsTrue)
// Check that we cannot log in to mongo with the correct password.
// This is because there's no mongo password set for s.machine,
// which has JobHostUnits
info := s.MongoInfo(c)
// TODO(dfc) this entity.Tag should return a Tag
tag, err := names.ParseTag(entity.Tag())
c.Assert(err, jc.ErrorIsNil)
info.Tag = tag
info.Password = "foo-12345678901234567890"
err = tryOpenState(s.State.ModelTag(), info)
c.Assert(errors.Cause(err), jc.Satisfies, errors.IsUnauthorized)
}示例#20
文件：
utils.go
项目：
bac/juju
// FingerprintMatches determines whether or not the identified file's
// fingerprint matches the expected fingerprint.
func (fpm FingerprintMatcher) FingerprintMatches(filename string, expected charmresource.Fingerprint) (bool, error) {
open := fpm.Open
if open == nil {
open = func(filename string) (io.ReadCloser, error) { return os.Open(filename) }
}
generateFingerprint := fpm.GenerateFingerprint
if generateFingerprint == nil {
generateFingerprint = charmresource.GenerateFingerprint
}
file, err := open(filename)
if os.IsNotExist(errors.Cause(err)) {
return false, nil
}
if err != nil {
return false, errors.Trace(err)
}
defer file.Close()
fp, err := generateFingerprint(file)
if err != nil {
return false, errors.Trace(err)
}
matches := (fp.String() == expected.String())
return matches, nil
}示例#21
文件：
open.go
项目：
zhouqt/juju
// Prepare prepares a new environment based on the provided configuration.
// If the environment is already prepared, it behaves like New.
func Prepare(cfg *config.Config, ctx BootstrapContext, store configstore.Storage) (Environ, error) {
if p, err := Provider(cfg.Type()); err != nil {
return nil, err
} else if info, err := store.ReadInfo(cfg.Name()); errors.IsNotFound(errors.Cause(err)) {
info = store.CreateInfo(cfg.Name())
if env, err := prepare(ctx, cfg, info, p); err == nil {
return env, decorateAndWriteInfo(info, env.Config())
} else {
if err := info.Destroy(); err != nil {
logger.Warningf("cannot destroy newly created environment info: %v", err)
}
return nil, err
}
} else if err != nil {
return nil, errors.Annotatef(err, "error reading environment info %q", cfg.Name())
} else if !info.Initialized() {
return nil,
errors.Errorf(
"found uninitialized environment info for %q; environment preparation probably in progress or interrupted",
cfg.Name(),
)
} else if len(info.BootstrapConfig()) == 0 {
return nil, errors.New("found environment info but no bootstrap config")
} else {
cfg, err = config.New(config.NoDefaults, info.BootstrapConfig())
if err != nil {
return nil, errors.Annotate(err, "cannot parse bootstrap config")
}
return New(cfg)
}
}示例#22
文件：
manifold.go
项目：
imoapps/juju
func (w *collect) do() error {
logger.Tracef("recording metrics")
config := w.agent.CurrentConfig()
tag := config.Tag()
unitTag, ok := tag.(names.UnitTag)
if !ok {
return errors.Errorf("expected a unit tag, got %v", tag)
}
paths := uniter.NewWorkerPaths(config.DataDir(), unitTag, "metrics-collect")
recorder, err := newRecorder(unitTag, paths, w.unitCharmLookup, w.metricFactory)
if errors.Cause(err) == errMetricsNotDefined {
logger.Tracef("%v", err)
return nil
} else if err != nil {
return errors.Annotate(err, "failed to instantiate metric recorder")
}
ctx := newHookContext(unitTag.String(), recorder)
err = ctx.addJujuUnitsMetric()
if err != nil {
return errors.Annotatef(err, "error adding 'juju-units' metric")
}
r := runner.NewRunner(ctx, paths)
err = r.RunHook(string(hooks.CollectMetrics))
if err != nil {
return errors.Annotatef(err, "error running 'collect-metrics' hook")
}
return nil
}示例#23
文件：
leadership.go
项目：
felicianotech/juju
// ClaimLeadership is part of the leadership.Claimer interface.
func (m leadershipClaimer) ClaimLeadership(serviceName, unitName string, duration time.Duration) error {
err := m.manager.Claim(serviceName, unitName, duration)
if errors.Cause(err) == corelease.ErrClaimDenied {
return leadership.ErrClaimDenied
}
return errors.Trace(err)
}示例#24
文件：
leadership.go
项目：
felicianotech/juju
// Check is part of the leadership.Token interface.
func (t leadershipToken) Check(out interface{}) error {
err := t.token.Check(out)
if errors.Cause(err) == corelease.ErrNotHeld {
return errors.Errorf("%q is not leader of %q", t.unitName, t.serviceName)
}
return errors.Trace(err)
}示例#25
文件：
service_windows.go
项目：
claudiu-coblis/juju
// ChangeServicePassword can change the password of a service
// as long as it belongs to the user defined in this package
func (s *SvcManager) ChangeServicePassword(svcName, newPassword string) error {
currentConfig, err := s.Config(svcName)
if err != nil {
// If access is denied when accessing the service it means
// we can't own it, so there's no reason to return an error
// since we only want to change the password on services started
// by us.
if errors.Cause(err) == syscall.ERROR_ACCESS_DENIED {
return nil
}
return errors.Trace(err)
}
if currentConfig.ServiceStartName == jujudUser {
currentConfig.Password = newPassword
service, err := s.getService(svcName)
if err != nil {
return errors.Trace(err)
}
defer service.Close()
err = service.UpdateConfig(currentConfig)
if err != nil {
return errors.Trace(err)
}
}
if err != nil {
return errors.Trace(err)
}
return nil
}示例#26
文件：
restorer.go
项目：
marete/restic
func (res *Restorer) restoreNodeTo(node *Node, dir string, dst string) error {
debug.Log("Restorer.restoreNodeTo", "node %v, dir %v, dst %v", node.Name, dir, dst)
dstPath := filepath.Join(dst, dir, node.Name)
err := node.CreateAt(dstPath, res.repo)
if err != nil {
debug.Log("Restorer.restoreNodeTo", "node.CreateAt(%s) error %v", dstPath, err)
}
// Did it fail because of ENOENT?
if err != nil && os.IsNotExist(errors.Cause(err)) {
debug.Log("Restorer.restoreNodeTo", "create intermediate paths")
// Create parent directories and retry
err = os.MkdirAll(filepath.Dir(dstPath), 0700)
if err == nil || err == os.ErrExist {
err = node.CreateAt(dstPath, res.repo)
}
}
if err != nil {
debug.Log("Restorer.restoreNodeTo", "error %v", err)
err = res.Error(dstPath, node, errors.Annotate(err, "create node"))
if err != nil {
return err
}
}
debug.Log("Restorer.restoreNodeTo", "successfully restored %v", node.Name)
return nil
}示例#27
文件：
http_test.go
项目：
kat-co/juju
func (s *httpSuite) TestHTTPClient(c *gc.C) {
var handler http.HandlerFunc
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
handler(w, req)
}))
defer srv.Close()
s.client.BaseURL = srv.URL
for i, test := range httpClientTests {
c.Logf("test %d: %s", i, test.about)
handler = test.handler
var resp interface{}
if test.expectResponse != nil {
resp = reflect.New(reflect.TypeOf(test.expectResponse).Elem()).Interface()
}
err := s.client.Get("/", resp)
if test.expectError != "" {
c.Check(err, gc.ErrorMatches, test.expectError)
c.Check(params.ErrCode(err), gc.Equals, test.expectErrorCode)
if err, ok := errors.Cause(err).(*params.Error); ok {
c.Check(err.Info, jc.DeepEquals, test.expectErrorInfo)
} else if test.expectErrorInfo != nil {
c.Fatalf("no error info found in error")
}
continue
}
c.Check(err, gc.IsNil)
c.Check(resp, jc.DeepEquals, test.expectResponse)
}
}示例#28
文件：
helpers_test.go
项目：
OSBI/juju
func (helpersSuite) TestAPIResult2ServiceResourcesFailure(c *gc.C) {
apiRes := api.Resource{
CharmResource: api.CharmResource{
Name: "spam",
Type: "file",
Path: "spam.tgz",
Origin: "upload",
Revision: 1,
Fingerprint: []byte(fingerprint),
Size: 10,
},
ID: "a-service/spam",
ServiceID: "a-service",
}
failure := errors.New("<failure>")
_, err := api.APIResult2ServiceResources(api.ResourcesResult{
ErrorResult: params.ErrorResult{
Error: ¶ms.Error{
Message: failure.Error(),
},
},
Resources: []api.Resource{
apiRes,
},
})
c.Check(err, gc.ErrorMatches, "<failure>")
c.Check(errors.Cause(err), gc.Not(gc.Equals), failure)
}示例#29
文件：
managedstorage_test.go
项目：
juju/blobstore
func (s *managedStorageSuite) TestPutPendingUpload(c *gc.C) {
// Manually set up a scenario where there's a resource recorded
// but the upload has not occurred.
rc := blobstore.GetResourceCatalog(s.managedStorage)
hash := "cb00753f45a35e8bb5a03d699ac65007272c32ab0eded1631a8b605a43ff5bed8086072ba1e7cc2358baeca134c825a7"
id, path, err := rc.Put(hash, 3)
c.Assert(err, gc.IsNil)
c.Assert(path, gc.Equals, "")
managedResource := blobstore.ManagedResource{
EnvUUID: "env",
User: "user",
Path: "environs/env/path/to/blob",
}
c.Assert(err, gc.IsNil)
_, err = blobstore.PutManagedResource(s.managedStorage, managedResource, id)
_, _, err = s.managedStorage.GetForEnvironment("env", "/path/to/blob")
c.Assert(errors.Cause(err), gc.Equals, blobstore.ErrUploadPending)
// Despite the upload being pending, a second concurrent upload will succeed.
rdr := bytes.NewReader([]byte("abc"))
err = s.managedStorage.PutForEnvironment("env", "/path/to/blob", rdr, 3)
c.Assert(err, gc.IsNil)
s.assertGet(c, "/path/to/blob", []byte("abc"))
}示例#30
文件：
charmstore.go
项目：
Pankov404/juju
// StoreCharmArchive stores a charm archive in environment storage.
func StoreCharmArchive(st *state.State, curl *charm.URL, ch charm.Charm, r io.Reader, size int64, sha256 string) error {
storage := newStateStorage(st.EnvironUUID(), st.MongoSession())
storagePath, err := charmArchiveStoragePath(curl)
if err != nil {
return errors.Annotate(err, "cannot generate charm archive name")
}
if err := storage.Put(storagePath, r, size); err != nil {
return errors.Annotate(err, "cannot add charm to storage")
}
// Now update the charm data in state and mark it as no longer pending.
_, err = st.UpdateUploadedCharm(ch, curl, storagePath, sha256)
if err != nil {
alreadyUploaded := err == state.ErrCharmRevisionAlreadyModified ||
errors.Cause(err) == state.ErrCharmRevisionAlreadyModified ||
state.IsCharmAlreadyUploadedError(err)
if err := storage.Remove(storagePath); err != nil {
if alreadyUploaded {
logger.Errorf("cannot remove duplicated charm archive from storage: %v", err)
} else {
logger.Errorf("cannot remove unsuccessfully recorded charm archive from storage: %v", err)
}
}
if alreadyUploaded {
// Somebody else managed to upload and update the charm in
// state before us. This is not an error.
return nil
}
}
return nil
}