open-nomad/client/state/interface.go

48 lines
1.7 KiB
Go

package state
import (
"github.com/hashicorp/nomad/client/allocrunner/taskrunner/state"
"github.com/hashicorp/nomad/nomad/structs"
)
// StateDB implementations store and load Nomad client state.
type StateDB interface {
// Name of implementation.
Name() string
// GetAllAllocations returns all valid allocations and a map of
// allocation IDs to retrieval errors.
//
// If a single error is returned then both allocations and the map will be nil.
GetAllAllocations() ([]*structs.Allocation, map[string]error, error)
// PulAllocation stores an allocation or returns an error if it could
// not be stored.
PutAllocation(*structs.Allocation) error
// GetTaskRunnerState returns the LocalState and TaskState for a
// TaskRunner. Either state may be nil if it is not found, but if an
// error is encountered only the error will be non-nil.
GetTaskRunnerState(allocID, taskName string) (*state.LocalState, *structs.TaskState, error)
// PutTaskRunnerLocalTask stores the LocalState for a TaskRunner or
// returns an error.
PutTaskRunnerLocalState(allocID, taskName string, val *state.LocalState) error
// PutTaskState stores the TaskState for a TaskRunner or returns an
// error.
PutTaskState(allocID, taskName string, state *structs.TaskState) error
// DeleteTaskBucket deletes a task's state bucket if it exists. No
// error is returned if it does not exist.
DeleteTaskBucket(allocID, taskName string) error
// DeleteAllocationBucket deletes an allocation's state bucket if it
// exists. No error is returned if it does not exist.
DeleteAllocationBucket(allocID string) error
// Close the database. Unsafe for further use after calling regardless
// of return value.
Close() error
}