optracker

package
v0.4.0 Latest Latest
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 Go to latest Published: May 30, 2018 License: MIT Imports: 8 Imported by: 0

Documentation

Overview

Package optracker implements functionality to track the status of pin and operations as needed by implementations of the pintracker component. It particularly allows to obtain status information for a given Cid, to skip re-tracking already ongoing operations, or to cancel ongoing operations when opposing ones arrive.

Index

Constants

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Variables

This section is empty.

Functions

This section is empty.

Types

type Operation 

type Operation struct {
	// contains filtered or unexported fields
}

Operation represents an ongoing operation involving a particular Cid. It provides the type and phase of operation and a way to mark the operation finished (also used to cancel).

func NewOperation 

func NewOperation(ctx context.Context, pin api.Pin, typ OperationType, ph Phase) *Operation

NewOperation creates a new Operation.

func (*Operation) Cancel 

func (op *Operation) Cancel()

Cancel will cancel the context associated to this operation.

func (*Operation) Cancelled 

func (op *Operation) Cancelled() bool

Cancelled returns whether the context for this operation has been cancelled.

func (*Operation) Cid 

func (op *Operation) Cid() *cid.Cid

Cid returns the Cid associated to this operation.

func (*Operation) Context 

func (op *Operation) Context() context.Context

Context returns the context associated to this operation.

func (*Operation) Error 

func (op *Operation) Error() string

Error returns any error message attached to the operation.

func (*Operation) Phase 

func (op *Operation) Phase() Phase

Phase returns the Phase.

func (*Operation) Pin 

func (op *Operation) Pin() api.Pin

Pin returns the Pin object associated to the operation.

func (*Operation) SetError 

func (op *Operation) SetError(err error)

SetError sets the phase to PhaseError along with an error message. It updates the timestamp.

func (*Operation) SetPhase 

func (op *Operation) SetPhase(ph Phase)

SetPhase changes the Phase and updates the timestamp.

func (*Operation) Timestamp 

func (op *Operation) Timestamp() time.Time

Timestamp returns the time when this operation was last modified (phase changed, error was set...)

func (*Operation) ToTrackerStatus 

func (op *Operation) ToTrackerStatus() api.TrackerStatus

ToTrackerStatus returns an api.TrackerStatus reflecting the current status of this operation. It's a translation from the Type and the Phase.

func (*Operation) Type 

func (op *Operation) Type() OperationType

Type returns the operation Type.

type OperationTracker 

type OperationTracker struct {
	// contains filtered or unexported fields
}

OperationTracker tracks and manages all inflight Operations.

func NewOperationTracker 

func NewOperationTracker(ctx context.Context, pid peer.ID) *OperationTracker

NewOperationTracker creates a new OperationTracker.

func (*OperationTracker) Clean 

func (opt *OperationTracker) Clean(op *Operation)

Clean deletes an operation from the tracker if it is the one we are tracking (compares pointers)

func (*OperationTracker) Get 

func (opt *OperationTracker) Get(c *cid.Cid) api.PinInfo

Get returns a PinInfo object for Cid.

func (*OperationTracker) GetAll 

func (opt *OperationTracker) GetAll() []api.PinInfo

GetAll returns PinInfo objets for all known operations

func (*OperationTracker) GetOpContext 

func (opt *OperationTracker) GetOpContext(c *cid.Cid) context.Context

GetOpContext gets the context of an operation, if any.

func (*OperationTracker) SetError 

func (opt *OperationTracker) SetError(c *cid.Cid, err error)

SetError transitions an operation for a Cid into PhaseError if its Status is PhaseDone. Any other phases are considered in-flight and not touched. For things already in error, the error message is updated.

func (*OperationTracker) Status 

func (opt *OperationTracker) Status(c *cid.Cid) (api.TrackerStatus, bool)

Status returns the TrackerStatus associated to the last operation known with the given Cid. It returns false if we are not tracking any operation for the given Cid.

func (*OperationTracker) TrackNewOperation 

func (opt *OperationTracker) TrackNewOperation(pin api.Pin, typ OperationType, ph Phase) *Operation

TrackNewOperation will create, track and return a new operation unless one already exists to do the same thing, in which case nil is returned.

If an operation exists it is of different type, it is cancelled and the new one replaces it in the tracker.

type OperationType 

type OperationType int

OperationType represents the kinds of operations that the PinTracker performs and the operationTracker tracks the status of. 

const (
	// OperationUnknown represents an unknown operation.
	OperationUnknown OperationType = iota
	// OperationPin represents a pin operation.
	OperationPin
	// OperationUnpin represents an unpin operation.
	OperationUnpin
	// OperationRemote represents an noop operation
	OperationRemote
)

func (OperationType) String 

func (i OperationType) String() string

type Phase 

type Phase int

Phase represents the multiple phase that an operation can be in. 

const (
	// PhaseError represents an error state.
	PhaseError Phase = iota
	// PhaseQueued represents the queued phase of an operation.
	PhaseQueued
	// PhaseInProgress represents the operation as in progress.
	PhaseInProgress
	// PhaseDone represents the operation once finished.
	PhaseDone
)

func (Phase) String 

func (i Phase) String() string

Source Files

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