updater

Documentation

Index

• func Configure(ctx context.Context, fs map[string]driver.UpdaterSetFactory, ...) error
• func Register(name string, f driver.UpdaterSetFactory)
• func Registered() map[string]driver.UpdaterSetFactory
• type Locker
• type Options
• type Store
• type Updater
  • func New(ctx context.Context, opts *Options) (*Updater, error)
  • func (u *Updater) Close() error
  • func (u *Updater) Fetch(ctx context.Context, prev io.ReaderAt, out io.Writer) error
  • func (u *Updater) Parse(ctx context.Context, in io.ReaderAt) error
  • func (u *Updater) Run(ctx context.Context, strict bool) error
• Bugs

Functions

func Configure

func Configure(ctx context.Context, fs map[string]driver.UpdaterSetFactory, cfg map[string]driver.ConfigUnmarshaler, c *http.Client) error

Configure calls the Configure method on all the passed-in UpdaterSetFactories.

Deprecated: See Updater.

func Register

func Register(name string, f driver.UpdaterSetFactory)

Register registers an UpdaterSetFactory.

Register will panic if the same name is used twice.

Deprecated: See Updater.

func Registered

func Registered() map[string]driver.UpdaterSetFactory

Registered returns a new map populated with the registered UpdaterSetFactories.

Deprecated: See Updater.

Types

type Locker

type Locker interface {
	// TryLock returns a cancelled Context if it would need to wait to acquire
	// the named lock.
	TryLock(context.Context, string) (context.Context, context.CancelFunc)
	// Lock waits to acquire the named lock. The returned Context may be
	// cancelled if the process loses confidence that the lock is valid.
	Lock(context.Context, string) (context.Context, context.CancelFunc)
}

Locker is the Context-based locking Updater expects.

type Options

type Options struct {

	// Store is the interface used to persist parsed data.
	Store Store
	// Client is the http.Client all the Updaters will use.
	Client *http.Client

	// Locker provides system-wide locks. If multiple Updater processes are
	// running, this should be backed by a distributed lock manager.
	Locker Locker
	// Configs holds configuration functions for Updaters.
	Configs driver.Configs
	// Factories is a slice of UpdaterFactories that are used to construct
	// Updaters on demand.
	Factories []driver.UpdaterFactory
	// contains filtered or unexported fields
}

Options contains the needed options for an Updater.

The Store and Client members are required. The others are optional, but should only be omitted in specific circumstances.

type Store

type Store interface {
	// UpdateEnrichments creates a new EnrichmentUpdateOperation, inserts the
	// provided EnrichmentRecord(s), and ensures enrichments from previous
	// updates are not queries by clients.
	UpdateEnrichments(ctx context.Context, ref uuid.UUID, kind string, fp driver.Fingerprint, es []driver.EnrichmentRecord) error

	// UpdateVulnerabilities creates a new UpdateOperation, inserts the provided
	// vulnerabilities, and ensures vulnerabilities from previous updates are
	// not queried by clients.
	UpdateVulnerabilities(ctx context.Context, ref uuid.UUID, updater string, fp driver.Fingerprint, vs *driver.ParsedVulnerabilities) error

	// GetLatestUpdateOperations reports the latest update operations. It must
	// report at least one per updater, if it exists.
	GetLatestUpdateOperations(ctx context.Context) ([]driver.UpdateOperation, error)
}

Store is the common interface to a data store that Updater expects.

type Updater

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

Updater coordinates running Updaters and saving the results.

Close must be called, or the program may panic.

func New

func New(ctx context.Context, opts *Options) (*Updater, error)

New returns an Updater ready to use.

None of the resources passed in the Options struct have any of their cleanup methods called, and need to be safe for use by multiple goroutines.

func (*Updater) Close

func (u *Updater) Close() error

Close releases any resources held by the Updater.

func (*Updater) Fetch

func (u *Updater) Fetch(ctx context.Context, prev io.ReaderAt, out io.Writer) error

Fetch runs only the Fetch step of the update process, writing it out to "out".

If "prev" is populated with the output of a previous run of this method, only changes since what was recorded in "prev" are written out.

func (*Updater) Parse

func (u *Updater) Parse(ctx context.Context, in io.ReaderAt) error

Parse runs the "second half" of the update process, using the contents of "in," which must have been populated by a previous call to Fetch.

The reader at "in" must have some way to detect its size.

func (*Updater) Run

func (u *Updater) Run(ctx context.Context, strict bool) error

Run constructs new updaters, runs them, and stores the results.

Errors reported from the Updater itself will return the error immediately, but errors reported from updaters are collected and reported once all updaters have run.

Run should be preferred to explicit Fetch and Parse calls, because knowing that both methods will be running in the same process allows for better resource usage.

Notes

Bugs

• The localLocker implementation does not respect the parent context cancellation when waiting for a lock.