dependencystore

Documentation

Index

• type Dependency
  • func (d *Dependency) MarshalUDT(name string, info gocql.TypeInfo) ([]byte, error)
  • func (d *Dependency) UnmarshalUDT(name string, info gocql.TypeInfo, data []byte) error
• type DependencyStore
  • func NewDependencyStore(session cassandra.Session, metricsFactory metrics.Factory, logger *zap.Logger, ...) (*DependencyStore, error)
  • func (s *DependencyStore) GetDependencies(_ context.Context, endTs time.Time, lookback time.Duration) ([]model.DependencyLink, error)
  • func (s *DependencyStore) WriteDependencies(ts time.Time, dependencies []model.DependencyLink) error
• type Version
  • func GetDependencyVersion(s cassandra.Session) Version
  • func (i Version) IsValid() bool

Types

type Dependency

type Dependency struct {
	Parent    string `cql:"parent"`
	Child     string `cql:"child"`
	CallCount int64  `cql:"call_count"` // always unsigned, but we cannot explicitly read uint64 from Cassandra
	Source    string `cql:"source"`
}

Dependency is the UDT representation of a Jaeger Dependency.

func (*Dependency) MarshalUDT

func (d *Dependency) MarshalUDT(name string, info gocql.TypeInfo) ([]byte, error)

MarshalUDT handles marshalling a Dependency.

func (*Dependency) UnmarshalUDT

func (d *Dependency) UnmarshalUDT(name string, info gocql.TypeInfo, data []byte) error

UnmarshalUDT handles unmarshalling a Dependency.

type DependencyStore

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

DependencyStore handles all queries and insertions to Cassandra dependencies

func NewDependencyStore

func NewDependencyStore(
	session cassandra.Session,
	metricsFactory metrics.Factory,
	logger *zap.Logger,
	version Version,
) (*DependencyStore, error)

NewDependencyStore returns a DependencyStore

func (*DependencyStore) GetDependencies

func (s *DependencyStore) GetDependencies(_ context.Context, endTs time.Time, lookback time.Duration) ([]model.DependencyLink, error)

GetDependencies returns all interservice dependencies

func (*DependencyStore) WriteDependencies

func (s *DependencyStore) WriteDependencies(ts time.Time, dependencies []model.DependencyLink) error

WriteDependencies implements dependencystore.Writer#WriteDependencies.

type Version

type Version int

Version determines which version of the dependencies table to use.

const (
	// V1 is used when the dependency table is SASI indexed.
	V1 Version = iota

	// V2 is used when the dependency table is NOT SASI indexed.
	V2
)

func GetDependencyVersion

func GetDependencyVersion(s cassandra.Session) Version

GetDependencyVersion attempts to determine the version of the dependencies table. TODO: Remove this once we've migrated to V2 permanently. https://github.com/jaegertracing/jaeger/issues/1344

func (Version) IsValid

func (i Version) IsValid() bool

IsValid returns true if the Version is a valid one.