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cluster_operation_instance.go
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/
cluster_operation_instance.go
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// Copyright 2015, Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package automation
import (
"github.com/golang/protobuf/proto"
pb "github.com/youtube/vitess/go/vt/proto/automation"
)
// ClusterOperationInstance is a runtime type which enhances the protobuf message "ClusterOperation" with runtime specific data.
// Unlike the protobuf message, the additional runtime data will not be part of a checkpoint.
// Methods of this struct are not thread-safe.
type ClusterOperationInstance struct {
pb.ClusterOperation
taskIDGenerator *IDGenerator
}
// NewClusterOperationInstance creates a new cluster operation instance with one initial task.
func NewClusterOperationInstance(clusterOpID string, initialTask *pb.TaskContainer, taskIDGenerator *IDGenerator) ClusterOperationInstance {
c := ClusterOperationInstance{
pb.ClusterOperation{
Id: clusterOpID,
SerialTasks: []*pb.TaskContainer{},
State: pb.ClusterOperationState_CLUSTER_OPERATION_NOT_STARTED,
},
taskIDGenerator,
}
c.InsertTaskContainers([]*pb.TaskContainer{initialTask}, 0)
return c
}
// InsertTaskContainers inserts "newTaskContainers" at pos in the current list of task containers. Existing task containers will be moved after the new task containers.
func (c *ClusterOperationInstance) InsertTaskContainers(newTaskContainers []*pb.TaskContainer, pos int) {
AddMissingTaskID(newTaskContainers, c.taskIDGenerator)
newSerialTasks := make([]*pb.TaskContainer, len(c.SerialTasks)+len(newTaskContainers))
copy(newSerialTasks, c.SerialTasks[:pos])
copy(newSerialTasks[pos:], newTaskContainers)
copy(newSerialTasks[pos+len(newTaskContainers):], c.SerialTasks[pos:])
c.SerialTasks = newSerialTasks
}
// Clone creates a deep copy of the inner protobuf.
// Other elements e.g. taskIDGenerator are not deep-copied.
func (c ClusterOperationInstance) Clone() ClusterOperationInstance {
var clone = c
clone.ClusterOperation = *(proto.Clone(&c.ClusterOperation).(*pb.ClusterOperation))
return clone
}