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103 lines
4.7 KiB
Go
103 lines
4.7 KiB
Go
package storage_ng
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import (
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clientmodel "github.com/prometheus/client_golang/model"
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"github.com/prometheus/prometheus/storage/metric"
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"github.com/prometheus/prometheus/utility"
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)
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type Storage interface {
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// AppendSamples stores a group of new samples. Multiple samples for the same
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// fingerprint need to be submitted in chronological order, from oldest to
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// newest (both in the same call to AppendSamples and across multiple calls).
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AppendSamples(clientmodel.Samples)
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// NewPreloader returns a new Preloader which allows preloading and pinning
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// series data into memory for use within a query.
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NewPreloader() Preloader
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// Get all of the metric fingerprints that are associated with the
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// provided label matchers.
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GetFingerprintsForLabelMatchers(metric.LabelMatchers) clientmodel.Fingerprints
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// Get all of the label values that are associated with a given label name.
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GetLabelValuesForLabelName(clientmodel.LabelName) clientmodel.LabelValues
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// Get the metric associated with the provided fingerprint.
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GetMetricForFingerprint(clientmodel.Fingerprint) clientmodel.Metric
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// Get all label values that are associated with a given label name.
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GetAllValuesForLabel(clientmodel.LabelName) clientmodel.LabelValues
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// Construct an iterator for a given fingerprint.
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NewIterator(clientmodel.Fingerprint) SeriesIterator
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// Run the request-serving and maintenance loop.
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Serve(started chan<- bool)
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// Close the MetricsStorage and releases all resources.
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Close() error
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}
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type SeriesIterator interface {
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// Get the two values that are immediately adjacent to a given time.
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GetValueAtTime(clientmodel.Timestamp) metric.Values
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// Get the boundary values of an interval: the first value older than
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// the interval start, and the first value younger than the interval
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// end.
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GetBoundaryValues(metric.Interval) metric.Values
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// Get all values contained within a provided interval.
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GetRangeValues(metric.Interval) metric.Values
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}
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// A Persistence stores samples persistently across restarts.
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type Persistence interface {
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// PersistChunk persists a single chunk of a series.
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PersistChunk(clientmodel.Fingerprint, chunk) error
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// PersistIndexes persists a Prometheus server's timeseries indexes. It
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// is the caller's responsibility to not modify indexes while persisting
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// is underway, and to not call this method multiple times concurrently.
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PersistIndexes(i *Indexes) error
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// PersistHeads persists all open (non-full) head chunks.
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PersistHeads(map[clientmodel.Fingerprint]*memorySeries) error
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// DropChunks deletes all chunks from a timeseries whose last sample time is
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// before beforeTime.
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DropChunks(fp clientmodel.Fingerprint, beforeTime clientmodel.Timestamp) error
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// LoadChunks loads a group of chunks of a timeseries by their index. The
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// chunk with the earliest time will have index 0, the following ones will
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// have incrementally larger indexes.
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LoadChunks(fp clientmodel.Fingerprint, indexes []int) (chunks, error)
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// LoadChunkDescs loads chunkDescs for a series up until a given time.
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LoadChunkDescs(fp clientmodel.Fingerprint, beforeTime clientmodel.Timestamp) (chunkDescs, error)
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// LoadHeads loads all open (non-full) head chunks.
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LoadHeads(map[clientmodel.Fingerprint]*memorySeries) error
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// LoadIndexes loads and returns all timeseries indexes. It is the
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// caller's responsibility to not modify indexes while loading is
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// underway, and to not call this method multiple times concurrently.
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LoadIndexes() (*Indexes, error)
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}
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// A Preloader preloads series data necessary for a query into memory and pins
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// them until released via Close().
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type Preloader interface {
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PreloadRange(fp clientmodel.Fingerprint, from clientmodel.Timestamp, through clientmodel.Timestamp) error
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/*
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// GetMetricAtTime loads and pins samples around a given time.
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GetMetricAtTime(clientmodel.Fingerprint, clientmodel.Timestamp) error
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// GetMetricAtInterval loads and pins samples at intervals.
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GetMetricAtInterval(fp clientmodel.Fingerprint, from, through clientmodel.Timestamp, interval time.Duration) error
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// GetMetricRange loads and pins a given range of samples.
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GetMetricRange(fp clientmodel.Fingerprint, from, through clientmodel.Timestamp) error
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// GetMetricRangeAtInterval loads and pins sample ranges at intervals.
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GetMetricRangeAtInterval(fp clientmodel.Fingerprint, from, through clientmodel.Timestamp, interval, rangeDuration time.Duration) error
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*/
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// Close unpins any previously requested series data from memory.
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Close()
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}
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type Closer interface {
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// Close cleans up any used resources.
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Close()
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}
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type Indexes struct {
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FingerprintToSeries map[clientmodel.Fingerprint]*memorySeries
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LabelPairToFingerprints map[metric.LabelPair]utility.Set
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LabelNameToLabelValues map[clientmodel.LabelName]utility.Set
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}
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