Adding OWNERS file for vSphere cloud-provider package

also updating license file for Govmomi library

vendor/github.com/vmware/govmomi/task/wait.go

@@ -0,0 +1,126 @@
+/*
+Copyright (c) 2015 VMware, Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package task
+
+import (
+	"github.com/vmware/govmomi/property"
+	"github.com/vmware/govmomi/vim25/progress"
+	"github.com/vmware/govmomi/vim25/types"
+	"golang.org/x/net/context"
+)
+
+type taskProgress struct {
+	info *types.TaskInfo
+}
+
+func (t taskProgress) Percentage() float32 {
+	return float32(t.info.Progress)
+}
+
+func (t taskProgress) Detail() string {
+	return ""
+}
+
+func (t taskProgress) Error() error {
+	if t.info.Error != nil {
+		return Error{t.info.Error}
+	}
+
+	return nil
+}
+
+type taskCallback struct {
+	ch   chan<- progress.Report
+	info *types.TaskInfo
+	err  error
+}
+
+func (t *taskCallback) fn(pc []types.PropertyChange) bool {
+	for _, c := range pc {
+		if c.Name != "info" {
+			continue
+		}
+
+		if c.Op != types.PropertyChangeOpAssign {
+			continue
+		}
+
+		if c.Val == nil {
+			continue
+		}
+
+		ti := c.Val.(types.TaskInfo)
+		t.info = &ti
+	}
+
+	pr := taskProgress{t.info}
+
+	// Store copy of error, so Wait() can return it as well.
+	t.err = pr.Error()
+
+	switch t.info.State {
+	case types.TaskInfoStateQueued, types.TaskInfoStateRunning:
+		if t.ch != nil {
+			// Don't care if this is dropped
+			select {
+			case t.ch <- pr:
+			default:
+			}
+		}
+		return false
+	case types.TaskInfoStateSuccess, types.TaskInfoStateError:
+		if t.ch != nil {
+			// Last one must always be delivered
+			t.ch <- pr
+		}
+		return true
+	default:
+		panic("unknown state: " + t.info.State)
+	}
+}
+
+// Wait waits for a task to finish with either success or failure. It does so
+// by waiting for the "info" property of task managed object to change. The
+// function returns when it finds the task in the "success" or "error" state.
+// In the former case, the return value is nil. In the latter case the return
+// value is an instance of this package's Error struct.
+//
+// Any error returned while waiting for property changes causes the function to
+// return immediately and propagate the error.
+//
+// If the progress.Sinker argument is specified, any progress updates for the
+// task are sent here. The completion percentage is passed through directly.
+// The detail for the progress update is set to an empty string. If the task
+// finishes in the error state, the error instance is passed through as well.
+// Note that this error is the same error that is returned by this function.
+//
+func Wait(ctx context.Context, ref types.ManagedObjectReference, pc *property.Collector, s progress.Sinker) (*types.TaskInfo, error) {
+	cb := &taskCallback{}
+
+	// Include progress sink if specified
+	if s != nil {
+		cb.ch = s.Sink()
+		defer close(cb.ch)
+	}
+
+	err := property.Wait(ctx, pc, ref, []string{"info"}, cb.fn)
+	if err != nil {
+		return nil, err
+	}
+
+	return cb.info, cb.err
+}