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common.go
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common.go
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// Copyright 2017 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 (
"fmt"
"github.com/vmware/vic/lib/config/executor"
"github.com/vmware/vic/lib/migration/feature"
"github.com/vmware/vic/lib/portlayer/exec"
"github.com/vmware/vic/pkg/trace"
)
// Toggle launching of the process in the container
func toggleActive(op *trace.Operation, h interface{}, id string, active bool) (interface{}, error) {
defer trace.End(trace.Begin(id))
handle, ok := h.(*exec.Handle)
if !ok {
return nil, fmt.Errorf("Type assertion failed for %#+v", handle)
}
var task *executor.SessionConfig
if taskS, okS := handle.ExecConfig.Sessions[id]; okS {
task = taskS
} else if taskE, okE := handle.ExecConfig.Execs[id]; okE {
task = taskE
}
// if no task has been joined that can be manipulated in the container's current state
if task == nil {
// FIXME return a compatibility style error here. Propagate it back to the user.
if err := compatible(handle); err != nil {
return nil, err
}
// NOTE: this was the previous error, before merging we need to decide which one to use.
// return nil, fmt.Errorf("Cannot modify task %s in current state", id)
return nil, TaskNotFoundError{msg: fmt.Sprintf("Cannot find task %s", id)}
}
// TODO: determine if a reload is required based on current state
op.Debugf("Toggling active state of task %s (%s): %t", id, task.Cmd.Path, active)
task.Active = active
handle.Reload()
return handle, nil
}
func compatible(h interface{}) error {
if handle, ok := h.(*exec.Handle); ok {
if handle.DataVersion < feature.TasksSupportedVersion {
return fmt.Errorf("running tasks not supported for this container")
}
return nil
}
return fmt.Errorf("Type assertion failed for %#+v", h)
}