continuous_querier

type Config struct {
	// Enables logging in CQ service to display when CQ's are processed and how many points are wrote.
	LogEnabled bool `toml:"log-enabled"`

	// If this flag is set to false, both the brokers and data nodes should ignore any CQ processing.
	Enabled bool `toml:"enabled"`

	// when continuous queries are run we'll automatically recompute previous intervals
	// in case lagged data came in. Set to zero if you never have lagged data. We do
	// it this way because invalidating previously computed intervals would be insanely hard
	// and expensive.
	RecomputePreviousN int `toml:"recompute-previous-n"`

	// The RecomputePreviousN setting provides guidance for how far back to recompute, the RecomputeNoOlderThan
	// setting sets a ceiling on how far back in time it will go. For example, if you have 2 PreviousN
	// and have this set to 10m, then we'd only compute the previous two intervals for any
	// CQs that have a group by time <= 5m. For all others, we'd only recompute the previous window
	RecomputeNoOlderThan toml.Duration `toml:"recompute-no-older-than"`

	// ComputeRunsPerInterval will determine how many times the current and previous N intervals
	// will be computed. The group by time will be divided by this and it will get computed  this many times:
	// group by time seconds / runs per interval
	// This will give partial results for current group by intervals and will determine how long it will
	// be until lagged data is recomputed. For example, if this number is 10 and the group by time is 10m, it
	// will be a minute past the previous 10m bucket of time before lagged data is picked up
	ComputeRunsPerInterval int `toml:"compute-runs-per-interval"`

	// ComputeNoMoreThan paired with the RunsPerInterval will determine the ceiling of how many times smaller
	// group by times will be computed. For example, if you have RunsPerInterval set to 10 and this setting
	// to 1m. Then for a group by time(1m) will actually only get computed once per interval (and once per PreviousN).
	// If you have a group by time(5m) then you'll get five computes per interval. Any group by time window larger
	// than 10m will get computed 10 times for each interval.
	ComputeNoMoreThan toml.Duration `toml:"compute-no-more-than"`
}

type ContinuousQuerier interface {
	// Run executes the named query in the named database.  Blank database or name matches all.
	Run(database, name string, t time.Time) error
}

type ContinuousQuery struct {
	Database string
	Info     *meta.ContinuousQueryInfo
	LastRun  time.Time
	// contains filtered or unexported fields
}

type RunRequest struct {
	// Now tells the CQ serivce what the current time is.
	Now time.Time
	// CQs tells the CQ service which queries to run.
	// If nil, all queries will be run.
	CQs []string
}

type Service struct {
	MetaStore     metaStore
	QueryExecutor queryExecutor
	PointsWriter  pointsWriter
	Config        *Config
	RunInterval   time.Duration
	// RunCh can be used by clients to signal service to run CQs.
	RunCh  chan *RunRequest
	Logger *log.Logger
	// contains filtered or unexported fields
}