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github.com/pilosa/pilosa

package pilosa

v1.4.0
Latest Go to latest
Published: Sep 17, 2019 | License: Apache-2.0 | Module: github.com/pilosa/pilosa

Overview

Package pilosa implements the core of the Pilosa distributed bitmap index. It contains all the domain objects, interfaces, and logic that defines pilosa.

Index

Constants

const (

	// ClusterState represents the state returned in the /status endpoint.
	ClusterStateStarting = "STARTING"
	ClusterStateDegraded = "DEGRADED" // cluster is running but we've lost some # of hosts >0 but < replicaN
	ClusterStateNormal   = "NORMAL"
	ClusterStateResizing = "RESIZING"
)
const (
	DefaultFieldType = FieldTypeSet

	DefaultCacheType = CacheTypeRanked

	// Default ranked field cache
	DefaultCacheSize = 50000
)

Default field settings.

const (
	FieldTypeSet   = "set"
	FieldTypeInt   = "int"
	FieldTypeTime  = "time"
	FieldTypeMutex = "mutex"
	FieldTypeBool  = "bool"
)

Field types.

const (
	CacheTypeLRU    = "lru"
	CacheTypeRanked = "ranked"
	CacheTypeNone   = "none"
)

Cache types.

const (
	// ShardWidth is the number of column IDs in a shard. It must be a power of 2 greater than or equal to 16.
	// shardWidthExponent = 20 // set in shardwidthNN.go files
	ShardWidth = 1 << shardwidth.Exponent

	// HashBlockSize is the number of rows in a merkle hash block.
	HashBlockSize = 100
)
const (
	LogEntryTypeInsertColumn = 1
	LogEntryTypeInsertRow    = 2
)

Log entry type constants.

const TimeFormat = "2006-01-02T15:04"

TimeFormat is the go-style time format used to parse string dates.

Variables

var (
	ErrHostRequired = errors.New("host required")

	ErrIndexRequired = errors.New("index required")
	ErrIndexExists   = errors.New("index already exists")
	ErrIndexNotFound = errors.New("index not found")

	// ErrFieldRequired is returned when no field is specified.
	ErrFieldRequired = errors.New("field required")
	ErrFieldExists   = errors.New("field already exists")
	ErrFieldNotFound = errors.New("field not found")

	ErrBSIGroupNotFound         = errors.New("bsigroup not found")
	ErrBSIGroupExists           = errors.New("bsigroup already exists")
	ErrBSIGroupNameRequired     = errors.New("bsigroup name required")
	ErrInvalidBSIGroupType      = errors.New("invalid bsigroup type")
	ErrInvalidBSIGroupRange     = errors.New("invalid bsigroup range")
	ErrInvalidBSIGroupValueType = errors.New("invalid bsigroup value type")
	ErrBSIGroupValueTooLow      = errors.New("bsigroup value too low")
	ErrBSIGroupValueTooHigh     = errors.New("bsigroup value too high")
	ErrInvalidRangeOperation    = errors.New("invalid range operation")
	ErrInvalidBetweenValue      = errors.New("invalid value for between operation")

	ErrInvalidView      = errors.New("invalid view")
	ErrInvalidCacheType = errors.New("invalid cache type")

	ErrName  = errors.New("invalid index or field name, must match [a-z][a-z0-9_-]* and contain at most 64 characters")
	ErrLabel = errors.New("invalid row or column label, must match [A-Za-z0-9_-]")

	// ErrFragmentNotFound is returned when a fragment does not exist.
	ErrFragmentNotFound = errors.New("fragment not found")
	ErrQueryRequired    = errors.New("query required")
	ErrQueryCancelled   = errors.New("query cancelled")
	ErrQueryTimeout     = errors.New("query timeout")
	ErrTooManyWrites    = errors.New("too many write commands")

	// TODO(2.0) poorly named - used when a *node* doesn't own a shard. Probably
	// we won't need this error at all by 2.0 though.
	ErrClusterDoesNotOwnShard = errors.New("node does not own shard")

	ErrNodeIDNotExists    = errors.New("node with provided ID does not exist")
	ErrNodeNotCoordinator = errors.New("node is not the coordinator")
	ErrResizeNotRunning   = errors.New("no resize job currently running")

	ErrNotImplemented            = errors.New("not implemented")
	ErrFieldsArgumentRequired    = errors.New("fields argument required")
	ErrExpectedFieldListArgument = errors.New("expected field list argument")
)

System errors.

var (
	ErrTranslateStoreClosed       = errors.New("pilosa: translate store closed")
	ErrTranslateStoreReaderClosed = errors.New("pilosa: translate store reader closed")
	ErrReplicationNotSupported    = errors.New("pilosa: replication not supported")
	ErrTranslateStoreReadOnly     = errors.New("pilosa: translate store could not find or create key, translate store read only")
)

Translate store errors.

var BuildTime = "not recorded"
var Enterprise = "0"
var EnterpriseEnabled = false
var ErrInvalidTimeQuantum = errors.New("invalid time quantum")

ErrInvalidTimeQuantum is returned when parsing a time quantum.

var NopBroadcaster broadcaster = &nopBroadcaster{}

NopBroadcaster represents a Broadcaster that doesn't do anything.

var Version = "v0.0.0"

func DecodeAttrs

func DecodeAttrs(v []byte) (map[string]interface{}, error)

DecodeAttrs decodes a byte slice into an attribute map.

func EncodeAttrs

func EncodeAttrs(attr map[string]interface{}) ([]byte, error)

EncodeAttrs encodes an attribute map into a byte slice.

func MarshalInternalMessage

func MarshalInternalMessage(m Message, s Serializer) ([]byte, error)

MarshalInternalMessage serializes the pilosa message and adds pilosa internal type info which is used by the internal messaging stuff.

func NewRankCache

func NewRankCache(maxEntries uint32) *rankCache

NewRankCache returns a new instance of RankCache.

func OptAPIImportWorkerPoolSize

func OptAPIImportWorkerPoolSize(size int) apiOption

func OptAPIServer

func OptAPIServer(s *Server) apiOption

type API

type API struct {
	Serializer Serializer
	// contains filtered or unexported fields
}

API provides the top level programmatic interface to Pilosa. It is usually wrapped by a handler which provides an external interface (e.g. HTTP).

func NewAPI

func NewAPI(opts ...apiOption) (*API, error)

NewAPI returns a new API instance.

func (*API) ApplySchema

func (api *API) ApplySchema(ctx context.Context, s *Schema, remote bool) error

ApplySchema takes the given schema and applies it across the cluster (if remote is false), or just to this node (if remote is true). This is designed for the use case of replicating a schema from one Pilosa cluster to another which is initially empty. It is not officially supported in other scenarios and may produce surprising results.

func (*API) AvailableShardsByIndex

func (api *API) AvailableShardsByIndex(ctx context.Context) map[string]*roaring.Bitmap

AvailableShardsByIndex returns bitmaps of shards with available by index name.

func (*API) Close

func (api *API) Close() error

Close closes the api and waits for it to shutdown.

func (*API) ClusterMessage

func (api *API) ClusterMessage(ctx context.Context, reqBody io.Reader) error

ClusterMessage is for internal use. It decodes a protobuf message out of the body and forwards it to the BroadcastHandler.

func (*API) CreateField

func (api *API) CreateField(ctx context.Context, indexName string, fieldName string, opts ...FieldOption) (*Field, error)

CreateField makes the named field in the named index with the given options. This method currently only takes a single functional option, but that may be changed in the future to support multiple options.

func (*API) CreateIndex

func (api *API) CreateIndex(ctx context.Context, indexName string, options IndexOptions) (*Index, error)

CreateIndex makes a new Pilosa index.

func (*API) DeleteAvailableShard

func (api *API) DeleteAvailableShard(_ context.Context, indexName, fieldName string, shardID uint64) error

DeleteAvailableShard a shard ID from the available shard set cache.

func (*API) DeleteField

func (api *API) DeleteField(ctx context.Context, indexName string, fieldName string) error

DeleteField removes the named field from the named index. If the index is not found, an error is returned. If the field is not found, it is ignored and no action is taken.

func (*API) DeleteIndex

func (api *API) DeleteIndex(ctx context.Context, indexName string) error

DeleteIndex removes the named index. If the index is not found it does nothing and returns no error.

func (*API) DeleteView

func (api *API) DeleteView(ctx context.Context, indexName string, fieldName string, viewName string) error

DeleteView removes the given view.

func (*API) ExportCSV

func (api *API) ExportCSV(ctx context.Context, indexName string, fieldName string, shard uint64, w io.Writer) error

ExportCSV encodes the fragment designated by the index,field,shard as CSV of the form <row>,<col>

func (*API) Field

func (api *API) Field(ctx context.Context, indexName, fieldName string) (*Field, error)

Field retrieves the named field.

func (*API) FieldAttrDiff

func (api *API) FieldAttrDiff(ctx context.Context, indexName string, fieldName string, blocks []AttrBlock) (map[uint64]map[string]interface{}, error)

FieldAttrDiff determines the local row attribute data blocks which differ from those provided.

func (*API) FragmentBlockData

func (api *API) FragmentBlockData(ctx context.Context, body io.Reader) ([]byte, error)

FragmentBlockData is an endpoint for internal usage. It is not guaranteed to return anything useful. Currently it returns protobuf encoded row and column ids from a "block" which is a subdivision of a fragment.

func (*API) FragmentBlocks

func (api *API) FragmentBlocks(ctx context.Context, indexName, fieldName, viewName string, shard uint64) ([]FragmentBlock, error)

FragmentBlocks returns the checksums and block ids for all blocks in the specified fragment.

func (*API) FragmentData

func (api *API) FragmentData(ctx context.Context, indexName, fieldName, viewName string, shard uint64) (io.WriterTo, error)

FragmentData returns all data in the specified fragment.

func (*API) GetTranslateData

func (api *API) GetTranslateData(ctx context.Context, offset int64) (io.ReadCloser, error)

GetTranslateData provides a reader for key translation logs starting at offset.

func (*API) Hosts

func (api *API) Hosts(ctx context.Context) []*Node

Hosts returns a list of the hosts in the cluster including their ID, URL, and which is the coordinator.

func (*API) Import

func (api *API) Import(ctx context.Context, req *ImportRequest, opts ...ImportOption) error

Import bulk imports data into a particular index,field,shard.

func (*API) ImportRoaring

func (api *API) ImportRoaring(ctx context.Context, indexName, fieldName string, shard uint64, remote bool, req *ImportRoaringRequest) (err error)

ImportRoaring is a low level interface for importing data to Pilosa when extremely high throughput is desired. The data must be encoded in a particular way which may be unintuitive (discussed below). The data is merged with existing data.

It takes as input a roaring bitmap which it uses as the data for the indicated index, field, and shard. The bitmap may be encoded according to the official roaring spec (https://github.com/RoaringBitmap/RoaringFormatSpec), or to the pilosa roaring spec which supports 64 bit integers (https://www.pilosa.com/docs/latest/architecture/#roaring-bitmap-storage-format).

The data should be encoded the same way that Pilosa stores fragments internally. A bit "i" being set in the input bitmap indicates that the bit is set in Pilosa row "i/ShardWidth", and in column (shard*ShardWidth)+(i%ShardWidth). That is to say that "data" represents all of the rows in this shard of this field concatenated together in one long bitmap.

func (*API) ImportValue

func (api *API) ImportValue(ctx context.Context, req *ImportValueRequest, opts ...ImportOption) error

ImportValue bulk imports values into a particular field.

func (*API) Index

func (api *API) Index(ctx context.Context, indexName string) (*Index, error)

Index retrieves the named index.

func (*API) IndexAttrDiff

func (api *API) IndexAttrDiff(ctx context.Context, indexName string, blocks []AttrBlock) (map[uint64]map[string]interface{}, error)

IndexAttrDiff determines the local column attribute data blocks which differ from those provided.

func (*API) Info

func (api *API) Info() serverInfo

Info returns information about this server instance.

func (*API) LongQueryTime

func (api *API) LongQueryTime() time.Duration

LongQueryTime returns the configured threshold for logging/statting long running queries.

func (*API) MaxShards

func (api *API) MaxShards(ctx context.Context) map[string]uint64

MaxShards returns the maximum shard number for each index in a map. TODO (2.0): This method has been deprecated. Instead, use AvailableShardsByIndex.

func (*API) Node

func (api *API) Node() *Node

Node gets the ID, URI and coordinator status for this particular node.

func (*API) Query

func (api *API) Query(ctx context.Context, req *QueryRequest) (QueryResponse, error)

Query parses a PQL query out of the request and executes it.

func (*API) RecalculateCaches

func (api *API) RecalculateCaches(ctx context.Context) error

RecalculateCaches forces all TopN caches to be updated. Used mainly for integration tests.

func (*API) RemoveNode

func (api *API) RemoveNode(id string) (*Node, error)

RemoveNode puts the cluster into the "RESIZING" state and begins the job of removing the given node.

func (*API) ResizeAbort

func (api *API) ResizeAbort() error

ResizeAbort stops the current resize job.

func (*API) Schema

func (api *API) Schema(ctx context.Context) []*IndexInfo

Schema returns information about each index in Pilosa including which fields they contain.

func (*API) SetCoordinator

func (api *API) SetCoordinator(ctx context.Context, id string) (oldNode, newNode *Node, err error)

SetCoordinator makes a new Node the cluster coordinator.

func (*API) ShardNodes

func (api *API) ShardNodes(ctx context.Context, indexName string, shard uint64) ([]*Node, error)

ShardNodes returns the node and all replicas which should contain a shard's data.

func (*API) State

func (api *API) State() string

State returns the cluster state which is usually "NORMAL", but could be "STARTING", "RESIZING", or potentially others. See cluster.go for more details.

func (*API) StatsWithTags

func (api *API) StatsWithTags(tags []string) stats.StatsClient

StatsWithTags returns an instance of whatever implementation of StatsClient pilosa is using with the given tags.

func (*API) TranslateKeys

func (api *API) TranslateKeys(body io.Reader) ([]byte, error)

TranslateKeys handles a TranslateKeyRequest.

func (*API) Version

func (api *API) Version() string

Version returns the Pilosa version.

func (*API) Views

func (api *API) Views(ctx context.Context, indexName string, fieldName string) ([]*view, error)

Views returns the views in the given field.

type AttrBlock

type AttrBlock struct {
	ID       uint64 `json:"id"`
	Checksum []byte `json:"checksum"`
}

AttrBlock represents a checksummed block of the attribute store.

type AttrStore

type AttrStore interface {
	Path() string
	Open() error
	Close() error
	Attrs(id uint64) (m map[string]interface{}, err error)
	SetAttrs(id uint64, m map[string]interface{}) error
	SetBulkAttrs(m map[uint64]map[string]interface{}) error
	Blocks() ([]AttrBlock, error)
	BlockData(i uint64) (map[uint64]map[string]interface{}, error)
}

AttrStore represents an interface for handling row/column attributes.

type BadRequestError

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

BadRequestError wraps an error value to signify that a request could not be read, decoded, or parsed such that in an HTTP scenario, http.StatusBadRequest would be returned.

func NewBadRequestError

func NewBadRequestError(err error) BadRequestError

NewBadRequestError returns err wrapped in a BadRequestError.

type Bit

type Bit struct {
	RowID     uint64
	ColumnID  uint64
	RowKey    string
	ColumnKey string
	Timestamp int64
}

Bit represents the intersection of a row and a column. It can be specified by integer ids or string keys.

type BlockDataRequest

type BlockDataRequest struct {
	Index string
	Field string
	View  string
	Shard uint64
	Block uint64
}

BlockDataRequest describes the structure of a request for fragment block data.

type BlockDataResponse

type BlockDataResponse struct {
	RowIDs    []uint64
	ColumnIDs []uint64
}

BlockDataResponse is the structured response of a block data request.

type ClusterStatus

type ClusterStatus struct {
	ClusterID string
	State     string
	Nodes     []*Node
}

ClusterStatus describes the status of the cluster including its state and node topology.

type CmdIO

type CmdIO struct {
	Stdin  io.Reader
	Stdout io.Writer
	Stderr io.Writer
}

CmdIO holds standard unix inputs and outputs.

func NewCmdIO

func NewCmdIO(stdin io.Reader, stdout, stderr io.Writer) *CmdIO

NewCmdIO returns a new instance of CmdIO with inputs and outputs set to the arguments.

type ColumnAttrSet

type ColumnAttrSet struct {
	ID    uint64                 `json:"id"`
	Key   string                 `json:"key,omitempty"`
	Attrs map[string]interface{} `json:"attrs,omitempty"`
}

ColumnAttrSet represents a set of attributes for a vertical column in an index. Can have a set of attributes attached to it.

func (ColumnAttrSet) MarshalJSON

func (cas ColumnAttrSet) MarshalJSON() ([]byte, error)

MarshalJSON marshals the ColumnAttrSet to JSON such that either a Key or an ID is included.

type ConflictError

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

ConflictError wraps an error value to signify that a conflict with an existing resource occurred such that in an HTTP scenario, http.StatusConflict would be returned.

type CreateFieldMessage

type CreateFieldMessage struct {
	Index string
	Field string
	Meta  *FieldOptions
}

CreateFieldMessage is an internal message indicating field creation.

type CreateIndexMessage

type CreateIndexMessage struct {
	Index string
	Meta  *IndexOptions
}

CreateIndexMessage is an internal message indicating index creation.

type CreateShardMessage

type CreateShardMessage struct {
	Index string
	Field string
	Shard uint64
}

CreateShardMessage is an internal message indicating shard creation.

type CreateViewMessage

type CreateViewMessage struct {
	Index string
	Field string
	View  string
}

CreateViewMessage is an internal message indicating view creation.

type DeleteAvailableShardMessage

type DeleteAvailableShardMessage struct {
	Index   string
	Field   string
	ShardID uint64
}

DeleteAvailableShardMessage is an internal message indicating available shard deletion.

type DeleteFieldMessage

type DeleteFieldMessage struct {
	Index string
	Field string
}

DeleteFieldMessage is an internal message indicating field deletion.

type DeleteIndexMessage

type DeleteIndexMessage struct {
	Index string
}

DeleteIndexMessage is an internal message indicating index deletion.

type DeleteViewMessage

type DeleteViewMessage struct {
	Index string
	Field string
	View  string
}

DeleteViewMessage is an internal message indicating view deletion.

type Field

type Field struct {
	Stats stats.StatsClient
	// contains filtered or unexported fields
}

Field represents a container for views.

func NewField

func NewField(path, index, name string, opts FieldOption) (*Field, error)

NewField returns a new instance of field.

func (*Field) AddRemoteAvailableShards

func (f *Field) AddRemoteAvailableShards(b *roaring.Bitmap) error

AddRemoteAvailableShards merges the set of available shards into the current known set and saves the set to a file.

func (*Field) AvailableShards

func (f *Field) AvailableShards() *roaring.Bitmap

AvailableShards returns a bitmap of shards that contain data.

func (*Field) CacheSize

func (f *Field) CacheSize() uint32

CacheSize returns the ranked field cache size.

func (*Field) ClearBit

func (f *Field) ClearBit(rowID, colID uint64) (changed bool, err error)

ClearBit clears a bit within the field.

func (*Field) Close

func (f *Field) Close() error

Close closes the field and its views.

func (*Field) Import

func (f *Field) Import(rowIDs, columnIDs []uint64, timestamps []*time.Time, opts ...ImportOption) error

Import bulk imports data.

func (*Field) Index

func (f *Field) Index() string

Index returns the index name the field was initialized with.

func (*Field) Max

func (f *Field) Max(filter *Row, name string) (max, count int64, err error)

Max returns the max for a field. An optional filtering row can be provided.

func (*Field) Min

func (f *Field) Min(filter *Row, name string) (min, count int64, err error)

Min returns the min for a field. An optional filtering row can be provided.

func (*Field) Name

func (f *Field) Name() string

Name returns the name the field was initialized with.

func (*Field) Open

func (f *Field) Open() error

Open opens and initializes the field.

func (*Field) Options

func (f *Field) Options() FieldOptions

Options returns all options for this field.

func (*Field) Path

func (f *Field) Path() string

Path returns the path the field was initialized with.

func (*Field) Range

func (f *Field) Range(name string, op pql.Token, predicate int64) (*Row, error)

Range performs a conditional operation on Field.

func (*Field) RemoveAvailableShard

func (f *Field) RemoveAvailableShard(v uint64) error

RemoveAvailableShard removes a shard from the bitmap cache.

NOTE: This can be overridden on the next sync so all nodes should be updated.

func (*Field) Row

func (f *Field) Row(rowID uint64) (*Row, error)

Row returns a row of the standard view. It seems this method is only being used by the test package, and the fact that it's only allowed on `set` fields is odd. This may be considered for deprecation in a future version.

func (*Field) RowAttrStore

func (f *Field) RowAttrStore() AttrStore

RowAttrStore returns the attribute storage.

func (*Field) RowTime

func (f *Field) RowTime(rowID uint64, time time.Time, quantum string) (*Row, error)

RowTime gets the row at the particular time with the granularity specified by the quantum.

func (*Field) SetBit

func (f *Field) SetBit(rowID, colID uint64, t *time.Time) (changed bool, err error)

SetBit sets a bit on a view within the field.

func (*Field) SetCacheSize

func (f *Field) SetCacheSize(v uint32) error

SetCacheSize sets the cache size for ranked fames. Persists to meta file on update. defaults to DefaultCacheSize 50000

func (*Field) SetValue

func (f *Field) SetValue(columnID uint64, value int64) (changed bool, err error)

SetValue sets a field value for a column.

func (*Field) Sum

func (f *Field) Sum(filter *Row, name string) (sum, count int64, err error)

Sum returns the sum and count for a field. An optional filtering row can be provided.

func (*Field) TimeQuantum

func (f *Field) TimeQuantum() TimeQuantum

TimeQuantum returns the time quantum for the field.

func (*Field) Type

func (f *Field) Type() string

Type returns the field type.

func (*Field) Value

func (f *Field) Value(columnID uint64) (value int64, exists bool, err error)

Value reads a field value for a column.

type FieldInfo

type FieldInfo struct {
	Name    string       `json:"name"`
	Options FieldOptions `json:"options"`
	Views   []*ViewInfo  `json:"views,omitempty"`
}

FieldInfo represents schema information for a field.

type FieldOption

type FieldOption func(fo *FieldOptions) error

FieldOption is a functional option type for pilosa.fieldOptions.

func OptFieldKeys

func OptFieldKeys() FieldOption

OptFieldKeys is a functional option on FieldOptions used to specify whether keys are used for this field.

func OptFieldTypeBool

func OptFieldTypeBool() FieldOption

OptFieldTypeBool is a functional option on FieldOptions used to specify the field as being type `bool` and to provide any respective configuration values.

func OptFieldTypeDefault

func OptFieldTypeDefault() FieldOption

OptFieldTypeDefault is a functional option on FieldOptions used to set the field type and cache setting to the default values.

func OptFieldTypeInt

func OptFieldTypeInt(min, max int64) FieldOption

OptFieldTypeInt is a functional option on FieldOptions used to specify the field as being type `int` and to provide any respective configuration values.

func OptFieldTypeMutex

func OptFieldTypeMutex(cacheType string, cacheSize uint32) FieldOption

OptFieldTypeMutex is a functional option on FieldOptions used to specify the field as being type `mutex` and to provide any respective configuration values.

func OptFieldTypeSet

func OptFieldTypeSet(cacheType string, cacheSize uint32) FieldOption

OptFieldTypeSet is a functional option on FieldOptions used to specify the field as being type `set` and to provide any respective configuration values.

func OptFieldTypeTime

func OptFieldTypeTime(timeQuantum TimeQuantum, opt ...bool) FieldOption

OptFieldTypeTime is a functional option on FieldOptions used to specify the field as being type `time` and to provide any respective configuration values. Pass true to skip creation of the standard view.

type FieldOptions

type FieldOptions struct {
	Base           int64       `json:"base,omitempty"`
	BitDepth       uint        `json:"bitDepth,omitempty"`
	Min            int64       `json:"min,omitempty"`
	Max            int64       `json:"max,omitempty"`
	Keys           bool        `json:"keys"`
	NoStandardView bool        `json:"noStandardView,omitempty"`
	CacheSize      uint32      `json:"cacheSize,omitempty"`
	CacheType      string      `json:"cacheType,omitempty"`
	Type           string      `json:"type,omitempty"`
	TimeQuantum    TimeQuantum `json:"timeQuantum,omitempty"`
}

FieldOptions represents options to set when initializing a field.

func (*FieldOptions) MarshalJSON

func (o *FieldOptions) MarshalJSON() ([]byte, error)

MarshalJSON marshals FieldOptions to JSON such that only those attributes associated to the field type are included.

type FieldRow

type FieldRow struct {
	Field  string `json:"field"`
	RowID  uint64 `json:"rowID"`
	RowKey string `json:"rowKey,omitempty"`
}

FieldRow is used to distinguish rows in a group by result.

func (FieldRow) MarshalJSON

func (fr FieldRow) MarshalJSON() ([]byte, error)

MarshalJSON marshals FieldRow to JSON such that either a Key or an ID is included.

func (FieldRow) String

func (fr FieldRow) String() string

String is the FieldRow stringer.

type FieldStatus

type FieldStatus struct {
	Name            string
	AvailableShards *roaring.Bitmap
}

FieldStatus is an internal message representing the contents of a field.

type FieldValue

type FieldValue struct {
	ColumnID  uint64
	ColumnKey string
	Value     int64
}

FieldValue represents the value for a column within a range-encoded field.

type FragmentBlock

type FragmentBlock struct {
	ID       int    `json:"id"`
	Checksum []byte `json:"checksum"`
}

FragmentBlock represents info about a subsection of the rows in a block. This is used for comparing data in remote blocks for active anti-entropy.

type GCNotifier

type GCNotifier interface {
	Close()
	AfterGC() <-chan struct{}
}

GCNotifier represents an interface for garbage collection notificationss.

var NopGCNotifier GCNotifier = &nopGCNotifier{}

NopGCNotifier represents a GCNotifier that doesn't do anything.

type GroupCount

type GroupCount struct {
	Group []FieldRow `json:"group"`
	Count uint64     `json:"count"`
}

GroupCount represents a result item for a group by query.

func (GroupCount) Compare

func (g GroupCount) Compare(o GroupCount) int

Compare is used in ordering two GroupCount objects.

type Handler

type Handler interface {
	Serve() error
	Close() error
}

Handler is the interface for the data handler, a wrapper around Pilosa's data store.

var NopHandler Handler = nopHandler{}

NopHandler is a no-op implementation of the Handler interface.

type Hasher

type Hasher interface {
	// Hashes the key into a number between [0,N).
	Hash(key uint64, n int) int
}

Hasher represents an interface to hash integers into buckets.

type Holder

type Holder struct {
	NewPrimaryTranslateStore func(interface{}) TranslateStore

	NewAttrStore func(string) AttrStore

	// Stats
	Stats stats.StatsClient

	// Data directory path.
	Path string

	Logger logger.Logger
	// contains filtered or unexported fields
}

Holder represents a container for indexes.

func NewHolder

func NewHolder() *Holder

NewHolder returns a new instance of Holder.

func (*Holder) Close

func (h *Holder) Close() error

Close closes all open fragments.

func (*Holder) CreateIndex

func (h *Holder) CreateIndex(name string, opt IndexOptions) (*Index, error)

CreateIndex creates an index. An error is returned if the index already exists.

func (*Holder) CreateIndexIfNotExists

func (h *Holder) CreateIndexIfNotExists(name string, opt IndexOptions) (*Index, error)

CreateIndexIfNotExists returns an index by name. The index is created if it does not already exist.

func (*Holder) DeleteIndex

func (h *Holder) DeleteIndex(name string) error

DeleteIndex removes an index from the holder.

func (*Holder) Field

func (h *Holder) Field(index, name string) *Field

Field returns the field for an index and name.

func (*Holder) HasData

func (h *Holder) HasData() (bool, error)

HasData returns true if Holder contains at least one index. This is used to determine if the rebalancing of data is necessary when a node joins the cluster.

func (*Holder) Index

func (h *Holder) Index(name string) *Index

Index returns the index by name.

func (*Holder) IndexPath

func (h *Holder) IndexPath(name string) string

IndexPath returns the path where a given index is stored.

func (*Holder) Indexes

func (h *Holder) Indexes() []*Index

Indexes returns a list of all indexes in the holder.

func (*Holder) Open

func (h *Holder) Open() error

Open initializes the root data directory for the holder.

func (*Holder) Schema

func (h *Holder) Schema() []*IndexInfo

Schema returns schema information for all indexes, fields, and views.

type ImportOption

type ImportOption func(*ImportOptions) error

ImportOption is a functional option type for API.Import.

func OptImportOptionsClear

func OptImportOptionsClear(c bool) ImportOption

OptImportOptionsClear is a functional option on ImportOption used to specify whether the import is a set or clear operation.

func OptImportOptionsIgnoreKeyCheck

func OptImportOptionsIgnoreKeyCheck(b bool) ImportOption

OptImportOptionsIgnoreKeyCheck is a functional option on ImportOption used to specify whether key check should be ignored.

type ImportOptions

type ImportOptions struct {
	Clear          bool
	IgnoreKeyCheck bool
}

ImportOptions holds the options for the API.Import method.

type ImportRequest

type ImportRequest struct {
	Index      string
	Field      string
	Shard      uint64
	RowIDs     []uint64
	ColumnIDs  []uint64
	RowKeys    []string
	ColumnKeys []string
	Timestamps []int64
}

ImportRequest describes the import request structure for an import.

type ImportResponse

type ImportResponse struct {
	Err string
}

ImportResponse is the structured response of an import.

type ImportRoaringRequest

type ImportRoaringRequest struct {
	Clear bool
	Views map[string][]byte
}

ImportRoaringRequest describes the import request structure for an import containing roaring-encoded data.

type ImportValueRequest

type ImportValueRequest struct {
	Index      string
	Field      string
	Shard      uint64
	ColumnIDs  []uint64
	ColumnKeys []string
	Values     []int64
}

ImportValueRequest describes the import request structure for a value (BSI) import.

type Index

type Index struct {
	Stats stats.StatsClient
	// contains filtered or unexported fields
}

Index represents a container for fields.

func NewIndex

func NewIndex(path, name string) (*Index, error)

NewIndex returns a new instance of Index.

func (*Index) AvailableShards

func (i *Index) AvailableShards() *roaring.Bitmap

AvailableShards returns a bitmap of all shards with data in the index.

func (*Index) Close

func (i *Index) Close() error

Close closes the index and its fields.

func (*Index) ColumnAttrStore

func (i *Index) ColumnAttrStore() AttrStore

ColumnAttrStore returns the storage for column attributes.

func (*Index) CreateField

func (i *Index) CreateField(name string, opts ...FieldOption) (*Field, error)

CreateField creates a field.

func (*Index) CreateFieldIfNotExists

func (i *Index) CreateFieldIfNotExists(name string, opts ...FieldOption) (*Field, error)

CreateFieldIfNotExists creates a field with the given options if it doesn't exist.

func (*Index) DeleteField

func (i *Index) DeleteField(name string) error

DeleteField removes a field from the index.

func (*Index) Field

func (i *Index) Field(name string) *Field

Field returns a field in the index by name.

func (*Index) Fields

func (i *Index) Fields() []*Field

Fields returns a list of all fields in the index.

func (*Index) Keys

func (i *Index) Keys() bool

Keys returns true if the index uses string keys.

func (*Index) Name

func (i *Index) Name() string

Name returns name of the index.

func (*Index) Open

func (i *Index) Open() error

Open opens and initializes the index.

func (*Index) Options

func (i *Index) Options() IndexOptions

Options returns all options for this index.

func (*Index) Path

func (i *Index) Path() string

Path returns the path the index was initialized with.

type IndexInfo

type IndexInfo struct {
	Name       string       `json:"name"`
	Options    IndexOptions `json:"options"`
	Fields     []*FieldInfo `json:"fields"`
	ShardWidth uint64       `json:"shardWidth"`
}

IndexInfo represents schema information for an index.

type IndexOptions

type IndexOptions struct {
	Keys           bool `json:"keys"`
	TrackExistence bool `json:"trackExistence"`
}

IndexOptions represents options to set when initializing an index.

type IndexStatus

type IndexStatus struct {
	Name   string
	Fields []*FieldStatus
}

IndexStatus is an internal message representing the contents of an index.

type InternalClient

type InternalClient interface {
	MaxShardByIndex(ctx context.Context) (map[string]uint64, error)
	Schema(ctx context.Context) ([]*IndexInfo, error)
	PostSchema(ctx context.Context, uri *URI, s *Schema, remote bool) error
	CreateIndex(ctx context.Context, index string, opt IndexOptions) error
	FragmentNodes(ctx context.Context, index string, shard uint64) ([]*Node, error)
	Nodes(ctx context.Context) ([]*Node, error)
	Query(ctx context.Context, index string, queryRequest *QueryRequest) (*QueryResponse, error)
	QueryNode(ctx context.Context, uri *URI, index string, queryRequest *QueryRequest) (*QueryResponse, error)
	Import(ctx context.Context, index, field string, shard uint64, bits []Bit, opts ...ImportOption) error
	ImportK(ctx context.Context, index, field string, bits []Bit, opts ...ImportOption) error
	EnsureIndex(ctx context.Context, name string, options IndexOptions) error
	EnsureField(ctx context.Context, indexName string, fieldName string) error
	EnsureFieldWithOptions(ctx context.Context, index, field string, opt FieldOptions) error
	ImportValue(ctx context.Context, index, field string, shard uint64, vals []FieldValue, opts ...ImportOption) error
	ImportValueK(ctx context.Context, index, field string, vals []FieldValue, opts ...ImportOption) error
	ExportCSV(ctx context.Context, index, field string, shard uint64, w io.Writer) error
	CreateField(ctx context.Context, index, field string) error
	CreateFieldWithOptions(ctx context.Context, index, field string, opt FieldOptions) error
	FragmentBlocks(ctx context.Context, uri *URI, index, field, view string, shard uint64) ([]FragmentBlock, error)
	BlockData(ctx context.Context, uri *URI, index, field, view string, shard uint64, block int) ([]uint64, []uint64, error)
	ColumnAttrDiff(ctx context.Context, uri *URI, index string, blks []AttrBlock) (map[uint64]map[string]interface{}, error)
	RowAttrDiff(ctx context.Context, uri *URI, index, field string, blks []AttrBlock) (map[uint64]map[string]interface{}, error)
	SendMessage(ctx context.Context, uri *URI, msg []byte) error
	RetrieveShardFromURI(ctx context.Context, index, field, view string, shard uint64, uri URI) (io.ReadCloser, error)
	ImportRoaring(ctx context.Context, uri *URI, index, field string, shard uint64, remote bool, req *ImportRoaringRequest) error
}

InternalClient should be implemented by any struct that enables any transport between nodes TODO: Refactor Note from Travis: Typically an interface containing more than two or three methods is an indication that something hasn't been architected correctly. While I understand that putting the entire Client behind an interface might require this many methods, I don't want to let it go unquestioned.

type InternalQueryClient

type InternalQueryClient interface {
	QueryNode(ctx context.Context, uri *URI, index string, queryRequest *QueryRequest) (*QueryResponse, error)
}

InternalQueryClient is the internal interface for querying a node.

type LogEntry

type LogEntry struct {
	Type  uint8
	Index []byte
	Field []byte

	IDs  []uint64
	Keys [][]byte

	// Length of the entry, in bytes.
	// This is only populated after ReadFrom() or WriteTo().
	Length uint64
}

LogEntry is a batch of Key/ID mappings which is replicated to other nodes for read-only key translation.

func (*LogEntry) ReadFrom

func (e *LogEntry) ReadFrom(r io.Reader) (_ int64, err error)

ReadFrom deserializes a LogEntry from r. r must be a ByteReader.

func (*LogEntry) WriteTo

func (e *LogEntry) WriteTo(w io.Writer) (_ int64, err error)

WriteTo serializes a LogEntry to w.

type Message

type Message interface{}

Message is the interface implemented by all core pilosa types which can be serialized to messages. TODO add at least a single "isMessage()" method.

type Node

type Node struct {
	ID            string `json:"id"`
	URI           URI    `json:"uri"`
	IsCoordinator bool   `json:"isCoordinator"`
	State         string `json:"state"`
}

Node represents a node in the cluster.

func (Node) String

func (n Node) String() string

type NodeEvent

type NodeEvent struct {
	Event NodeEventType
	Node  *Node
}

NodeEvent is a single event related to node activity in the cluster.

type NodeEventType

type NodeEventType int

NodeEventType are the types of node events.

const (
	NodeJoin NodeEventType = iota
	NodeLeave
	NodeUpdate
)

Constant node event types.

type NodeStateMessage

type NodeStateMessage struct {
	NodeID string `protobuf:"bytes,1,opt,name=NodeID,proto3" json:"NodeID,omitempty"`
	State  string `protobuf:"bytes,2,opt,name=State,proto3" json:"State,omitempty"`
}

NodeStateMessage is an internal message for broadcasting a node's state.

type NodeStatus

type NodeStatus struct {
	Node    *Node
	Indexes []*IndexStatus
	Schema  *Schema
}

NodeStatus is an internal message representing the contents of a node.

type Nodes

type Nodes []*Node

Nodes represents a list of nodes.

func (Nodes) Clone

func (a Nodes) Clone() []*Node

Clone returns a shallow copy of nodes.

func (Nodes) Contains

func (a Nodes) Contains(n *Node) bool

Contains returns true if a node exists in the list.

func (Nodes) ContainsID

func (a Nodes) ContainsID(id string) bool

ContainsID returns true if host matches one of the node's id.

func (Nodes) Filter

func (a Nodes) Filter(n *Node) []*Node

Filter returns a new list of nodes with node removed.

func (Nodes) FilterID

func (a Nodes) FilterID(id string) []*Node

FilterID returns a new list of nodes with ID removed.

func (Nodes) FilterURI

func (a Nodes) FilterURI(uri URI) []*Node

FilterURI returns a new list of nodes with URI removed.

func (Nodes) IDs

func (a Nodes) IDs() []string

IDs returns a list of all node IDs.

func (Nodes) URIs

func (a Nodes) URIs() []URI

URIs returns a list of all uris.

type NotFoundError

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

NotFoundError wraps an error value to signify that a resource was not found such that in an HTTP scenario, http.StatusNotFound would be returned.

type Pair

type Pair struct {
	ID    uint64 `json:"id"`
	Key   string `json:"key,omitempty"`
	Count uint64 `json:"count"`
}

Pair holds an id/count pair.

type Pairs

type Pairs []Pair

Pairs is a sortable slice of Pair objects.

func (Pairs) Add

func (p Pairs) Add(other []Pair) []Pair

Add merges other into p and returns a new slice.

func (Pairs) Keys

func (p Pairs) Keys() []uint64

Keys returns a slice of all keys in p.

func (Pairs) Len

func (p Pairs) Len() int

func (Pairs) Less

func (p Pairs) Less(i, j int) bool

func (*Pairs) Pop

func (p *Pairs) Pop() interface{}

Pop removes the minimum element from the Pair slice.

func (*Pairs) Push

func (p *Pairs) Push(x interface{})

Push appends the element onto the Pair slice.

func (Pairs) String

func (p Pairs) String() string

func (Pairs) Swap

func (p Pairs) Swap(i, j int)

type QueryRequest

type QueryRequest struct {
	// Index to execute query against.
	Index string

	// The query string to parse and execute.
	Query string

	// The shards to include in the query execution.
	// If empty, all shards are included.
	Shards []uint64

	// Return column attributes, if true.
	ColumnAttrs bool

	// Do not return row attributes, if true.
	ExcludeRowAttrs bool

	// Do not return columns, if true.
	ExcludeColumns bool

	// If true, indicates that query is part of a larger distributed query.
	// If false, this request is on the originating node.
	Remote bool
}

QueryRequest represent a request to process a query.

type QueryResponse

type QueryResponse struct {
	// Result for each top-level query call.
	// Can be a Bitmap, Pairs, or uint64.
	Results []interface{}

	// Set of column attribute objects matching IDs returned in Result.
	ColumnAttrSets []*ColumnAttrSet

	// Error during parsing or execution.
	Err error
}

QueryResponse represent a response from a processed query.

func (*QueryResponse) MarshalJSON

func (resp *QueryResponse) MarshalJSON() ([]byte, error)

MarshalJSON marshals QueryResponse into a JSON-encoded byte slice

type RecalculateCaches

type RecalculateCaches struct{}

RecalculateCaches is an internal message for recalculating all caches within a holder.

type ResizeInstruction

type ResizeInstruction struct {
	JobID         int64
	Node          *Node
	Coordinator   *Node
	Sources       []*ResizeSource
	NodeStatus    *NodeStatus
	ClusterStatus *ClusterStatus
}

ResizeInstruction contains the instruction provided to a node during a cluster resize operation.

type ResizeInstructionComplete

type ResizeInstructionComplete struct {
	JobID int64
	Node  *Node
	Error string
}

ResizeInstructionComplete is an internal message to the coordinator indicating that the resize instructions performed on a single node have completed.

type ResizeSource

type ResizeSource struct {
	Node  *Node  `protobuf:"bytes,1,opt,name=Node" json:"Node,omitempty"`
	Index string `protobuf:"bytes,2,opt,name=Index,proto3" json:"Index,omitempty"`
	Field string `protobuf:"bytes,3,opt,name=Field,proto3" json:"Field,omitempty"`
	View  string `protobuf:"bytes,4,opt,name=View,proto3" json:"View,omitempty"`
	Shard uint64 `protobuf:"varint,5,opt,name=Shard,proto3" json:"Shard,omitempty"`
}

ResizeSource is the source of data for a node acting on a ResizeInstruction.

type Row

type Row struct {

	// String keys translated to/from segment columns.
	Keys []string

	// Attributes associated with the row.
	Attrs map[string]interface{}
	// contains filtered or unexported fields
}

Row is a set of integers (the associated columns), and attributes which are arbitrary key/value pairs storing metadata about what the row represents.

func NewRow

func NewRow(columns ...uint64) *Row

NewRow returns a new instance of Row.

func (*Row) Any

func (r *Row) Any() bool

Any returns true if row contains any bits.

func (*Row) Columns

func (r *Row) Columns() []uint64

Columns returns the columns in r as a slice of ints.

func (*Row) Count

func (r *Row) Count() uint64

Count returns the number of columns in the row.

func (*Row) Difference

func (r *Row) Difference(other *Row) *Row

Difference returns the diff of r and other.

func (*Row) Freeze

func (r *Row) Freeze()

func (*Row) Intersect

func (r *Row) Intersect(other *Row) *Row

Intersect returns the itersection of r and other.

func (*Row) IsEmpty

func (r *Row) IsEmpty() bool

IsEmpty returns true if the row doesn't contain any set bits.

func (*Row) MarshalJSON

func (r *Row) MarshalJSON() ([]byte, error)

MarshalJSON returns a JSON-encoded byte slice of r.

func (*Row) Merge

func (r *Row) Merge(other *Row)

Merge merges data from other into r.

func (*Row) Segments

func (r *Row) Segments() []rowSegment

Segments returns a list of all segments in the row.

func (*Row) SetBit

func (r *Row) SetBit(i uint64) (changed bool)

SetBit sets the i-th column of the row.

func (*Row) Shift

func (r *Row) Shift(n int64) (*Row, error)

Shift returns the bitwise shift of r by n bits. Currently only positive shift values are supported.

func (*Row) Union

func (r *Row) Union(others ...*Row) *Row

Union returns the bitwise union of r and other.

func (*Row) Xor

func (r *Row) Xor(other *Row) *Row

Xor returns the xor of r and other.

type RowIDs

type RowIDs []uint64

RowIDs is a query return type for just uint64 row ids. It should only be used internally (since RowIdentifiers is the external return type), but it is exported because the proto package needs access to it.

type RowIdentifiers

type RowIdentifiers struct {
	Rows []uint64 `json:"rows"`
	Keys []string `json:"keys,omitempty"`
}

RowIdentifiers is a return type for a list of row ids or row keys. The names `Rows` and `Keys` are meant to follow the same convention as the Row query which returns `Columns` and `Keys`. TODO: Rename this to something better. Anything.

type Schema

type Schema struct {
	Indexes []*IndexInfo
}

Schema contains information about indexes and their configuration.

type Serializer

type Serializer interface {
	Marshal(Message) ([]byte, error)
	Unmarshal([]byte, Message) error
}

Serializer is an interface for serializing pilosa types to bytes and back.

type Server

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

Server represents a holder wrapped by a running HTTP server.

func NewServer

func NewServer(opts ...ServerOption) (*Server, error)

NewServer returns a new instance of Server.

func (*Server) Close

func (s *Server) Close() error

Close closes the server and waits for it to shutdown.

func (*Server) Holder

func (s *Server) Holder() *Holder

Holder returns the holder for server. TODO: have this return an interface for Holder instead of concrete object?

func (*Server) NodeID

func (s *Server) NodeID() string

NodeID returns the server's node id.

func (*Server) Open

func (s *Server) Open() error

Open opens and initializes the server.

func (*Server) SendAsync

func (s *Server) SendAsync(m Message) error

SendAsync represents an implementation of Broadcaster.

func (*Server) SendSync

func (s *Server) SendSync(m Message) error

SendSync represents an implementation of Broadcaster.

func (*Server) SendTo

func (s *Server) SendTo(to *Node, m Message) error

SendTo represents an implementation of Broadcaster.

func (*Server) SyncData

func (s *Server) SyncData() error

SyncData manually invokes the anti entropy process which makes sure that this node has the data from all replicas across the cluster.

func (*Server) UpAndDown

func (s *Server) UpAndDown() error

UpAndDown brings the server up minimally and shuts it down again; basically, it exists for testing holder open and close.

type ServerOption

type ServerOption func(s *Server) error

ServerOption is a functional option type for pilosa.Server

func OptServerAntiEntropyInterval

func OptServerAntiEntropyInterval(interval time.Duration) ServerOption

OptServerAntiEntropyInterval is a functional option on Server used to set the anti-entropy interval.

func OptServerAttrStoreFunc

func OptServerAttrStoreFunc(af func(string) AttrStore) ServerOption

OptServerAttrStoreFunc is a functional option on Server used to provide the function to use to generate a new attribute store.

func OptServerClusterDisabled

func OptServerClusterDisabled(disabled bool, hosts []string) ServerOption

OptServerClusterDisabled tells the server whether to use a static cluster with the defined hosts. Mostly used for testing.

func OptServerClusterHasher

func OptServerClusterHasher(h Hasher) ServerOption

OptServerClusterHasher is a functional option on Server used to specify the consistent hash algorithm for data location within the cluster.

func OptServerDataDir

func OptServerDataDir(dir string) ServerOption

OptServerDataDir is a functional option on Server used to set the data directory.

func OptServerDiagnosticsInterval

func OptServerDiagnosticsInterval(dur time.Duration) ServerOption

OptServerDiagnosticsInterval is a functional option on Server used to specify the duration between diagnostic checks.

func OptServerExecutorPoolSize

func OptServerExecutorPoolSize(size int) ServerOption

func OptServerGCNotifier

func OptServerGCNotifier(gcn GCNotifier) ServerOption

OptServerGCNotifier is a functional option on Server used to set the garbage collection notification source.

func OptServerInternalClient

func OptServerInternalClient(c InternalClient) ServerOption

OptServerInternalClient is a functional option on Server used to set the implementation of InternalClient.

func OptServerIsCoordinator

func OptServerIsCoordinator(is bool) ServerOption

OptServerIsCoordinator is a functional option on Server used to specify whether or not this server is the coordinator.

func OptServerLogger

func OptServerLogger(l logger.Logger) ServerOption

OptServerLogger is a functional option on Server used to set the logger.

func OptServerLongQueryTime

func OptServerLongQueryTime(dur time.Duration) ServerOption

OptServerLongQueryTime is a functional option on Server used to set long query duration.

func OptServerMaxWritesPerRequest

func OptServerMaxWritesPerRequest(n int) ServerOption

OptServerMaxWritesPerRequest is a functional option on Server used to set the maximum number of writes allowed per request.

func OptServerMetricInterval

func OptServerMetricInterval(dur time.Duration) ServerOption

OptServerMetricInterval is a functional option on Server used to set the interval between metric samples.

func OptServerNodeID

func OptServerNodeID(nodeID string) ServerOption

OptServerNodeID is a functional option on Server used to set the server node ID.

func OptServerPrimaryTranslateStore

func OptServerPrimaryTranslateStore(store TranslateStore) ServerOption

OptServerPrimaryTranslateStore has been deprecated.

func OptServerPrimaryTranslateStoreFunc

func OptServerPrimaryTranslateStoreFunc(tf func(interface{}) TranslateStore) ServerOption

OptServerPrimaryTranslateStoreFunc is a functional option on Server used to specify the function used to create a new primary translate store.

func OptServerReplicaN

func OptServerReplicaN(n int) ServerOption

OptServerReplicaN is a functional option on Server used to set the number of replicas.

func OptServerSerializer

func OptServerSerializer(ser Serializer) ServerOption

OptServerSerializer is a functional option on Server used to set the serializer.

func OptServerStatsClient

func OptServerStatsClient(sc stats.StatsClient) ServerOption

OptServerStatsClient is a functional option on Server used to specify the stats client.

func OptServerSystemInfo

func OptServerSystemInfo(si SystemInfo) ServerOption

OptServerSystemInfo is a functional option on Server used to set the system information source.

func OptServerTranslateFileMapSize

func OptServerTranslateFileMapSize(mapSize int) ServerOption

OptServerTranslateFileMapSize is a functional option on Server used to specify the size of the translate file.

func OptServerURI

func OptServerURI(uri *URI) ServerOption

OptServerURI is a functional option on Server used to set the server URI.

type SetCoordinatorMessage

type SetCoordinatorMessage struct {
	New *Node
}

SetCoordinatorMessage is an internal message instructing nodes to honor a new coordinator.

type SystemInfo

type SystemInfo interface {
	Uptime() (uint64, error)
	Platform() (string, error)
	Family() (string, error)
	OSVersion() (string, error)
	KernelVersion() (string, error)
	MemFree() (uint64, error)
	MemTotal() (uint64, error)
	MemUsed() (uint64, error)
	CPUModel() string
	CPUCores() (physical int, logical int, err error)
	CPUMHz() (int, error)
	CPUArch() string
}

SystemInfo collects information about the host OS.

type TimeQuantum

type TimeQuantum string

TimeQuantum represents a time granularity for time-based bitmaps.

func (TimeQuantum) HasDay

func (q TimeQuantum) HasDay() bool

HasDay returns true if the quantum contains a 'D' unit.

func (TimeQuantum) HasHour

func (q TimeQuantum) HasHour() bool

HasHour returns true if the quantum contains a 'H' unit.

func (TimeQuantum) HasMonth

func (q TimeQuantum) HasMonth() bool

HasMonth returns true if the quantum contains a 'M' unit.

func (TimeQuantum) HasYear

func (q TimeQuantum) HasYear() bool

HasYear returns true if the quantum contains a 'Y' unit.

func (*TimeQuantum) Set

func (q *TimeQuantum) Set(value string) error

Set sets the time quantum value.

func (TimeQuantum) String

func (q TimeQuantum) String() string

func (TimeQuantum) Type

func (q TimeQuantum) Type() string

Type returns the type of a time quantum value.

func (TimeQuantum) Valid

func (q TimeQuantum) Valid() bool

Valid returns true if q is a valid time quantum value.

type Topology

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

Topology represents the list of hosts in the cluster.

func (*Topology) ContainsID

func (t *Topology) ContainsID(id string) bool

ContainsID returns true if id matches one of the topology's IDs.

type TranslateFile

type TranslateFile struct {
	Path string

	// If non-nil, data is streamed from a primary and this is a read-only store.
	PrimaryTranslateStore TranslateStore
	// contains filtered or unexported fields
}

TranslateFile is an on-disk storage engine for translating string-to-uint64 values.

func NewTranslateFile

func NewTranslateFile(opts ...TranslateFileOption) *TranslateFile

NewTranslateFile returns a new instance of TranslateFile.

func (*TranslateFile) Close

func (s *TranslateFile) Close() (err error)

Close closes the translate file.

func (*TranslateFile) Closing

func (s *TranslateFile) Closing() <-chan struct{}

Closing returns a channel that is closed when the store is closed.

func (*TranslateFile) Open

func (s *TranslateFile) Open() (err error)

Open opens the translate file.

func (*TranslateFile) Reader

func (s *TranslateFile) Reader(ctx context.Context, offset int64) (io.ReadCloser, error)

Reader returns a reader that streams the underlying data file.

func (*TranslateFile) SetPrimaryStore

func (s *TranslateFile) SetPrimaryStore(id string, ts TranslateStore)

SetPrimaryStore sets the translate files's primary translate store. The id value is used to determine whether the primary needs to be changed from the current value (i.e. calling this multiple times with the same input values will no-op on all subsequent calls).

func (*TranslateFile) TranslateColumnToString

func (s *TranslateFile) TranslateColumnToString(index string, value uint64) (string, error)

TranslateColumnToString converts a uint64 id to its associated string value. If the id is not associated with a string value then a blank string is returned.

func (*TranslateFile) TranslateColumnsToUint64

func (s *TranslateFile) TranslateColumnsToUint64(index string, values []string) ([]uint64, error)

TranslateColumnsToUint64 converts values to a uint64 id. If value does not have an associated id then one is created.

func (*TranslateFile) TranslateRowToString

func (s *TranslateFile) TranslateRowToString(index, field string, id uint64) (string, error)

TranslateRowToString translates a row ID to a string key.

func (*TranslateFile) TranslateRowsToUint64

func (s *TranslateFile) TranslateRowsToUint64(index, field string, values []string) ([]uint64, error)

TranslateRowsToUint64 converts a slice of row keys to a slice of row IDs.

func (*TranslateFile) WriteNotify

func (s *TranslateFile) WriteNotify() <-chan struct{}

WriteNotify returns a channel that is closed when a new entry is written.

type TranslateFileOption

type TranslateFileOption func(f *TranslateFile) error

TranslateFileOption is a functional option type for pilosa.TranslateFile

func OptTranslateFileLogger

func OptTranslateFileLogger(l logger.Logger) TranslateFileOption

OptTranslateFileLogger is a functional option on TranslateFile used to set the file logger.

func OptTranslateFileMapSize

func OptTranslateFileMapSize(mapSize int) TranslateFileOption

OptTranslateFileMapSize is a functional option on TranslateFile used to set the map size.

type TranslateKeysRequest

type TranslateKeysRequest struct {
	Index string
	Field string
	Keys  []string
}

TranslateKeysRequest describes the structure of a request for a batch of key translations.

type TranslateKeysResponse

type TranslateKeysResponse struct {
	IDs []uint64
}

TranslateKeysResponse is the structured response of a key translation request.

type TranslateStore

type TranslateStore interface {
	TranslateColumnsToUint64(index string, values []string) ([]uint64, error)
	TranslateColumnToString(index string, values uint64) (string, error)

	TranslateRowsToUint64(index, field string, values []string) ([]uint64, error)
	TranslateRowToString(index, field string, values uint64) (string, error)

	// Returns a reader from the given offset of the raw data file.
	// The returned reader must be closed by the caller when done.
	Reader(ctx context.Context, off int64) (io.ReadCloser, error)
}

TranslateStore is the storage for translation string-to-uint64 values.

type URI

type URI struct {
	Scheme string `json:"scheme"`
	Host   string `json:"host"`
	Port   uint16 `json:"port"`
}

URI represents a Pilosa URI. A Pilosa URI consists of three parts: 1) Scheme: Protocol of the URI. Default: http. 2) Host: Hostname or IP URI. Default: localhost. IPv6 addresses should be written in brackets, e.g., `[fd42:4201:f86b:7e09:216:3eff:fefa:ed80]`. 3) Port: Port of the URI. Default: 10101.

All parts of the URI are optional. The following are equivalent:

http://localhost:10101
http://localhost
http://:10101
localhost:10101
localhost
:10101

func AddressWithDefaults

func AddressWithDefaults(addr string) (*URI, error)

AddressWithDefaults converts addr into a valid address, using defaults when necessary.

func NewURIFromAddress

func NewURIFromAddress(address string) (*URI, error)

NewURIFromAddress parses the passed address and returns a URI.

func NewURIFromHostPort

func NewURIFromHostPort(host string, port uint16) (*URI, error)

NewURIFromHostPort returns a URI with specified host and port.

func (*URI) HostPort

func (u *URI) HostPort() string

HostPort returns `Host:Port`

func (*URI) MarshalJSON

func (u *URI) MarshalJSON() ([]byte, error)

MarshalJSON marshals URI into a JSON-encoded byte slice.

func (*URI) Path

func (u *URI) Path(path string) string

Path returns URI with path

func (*URI) Set

func (u *URI) Set(value string) error

Set sets the uri value.

func (*URI) SetPort

func (u *URI) SetPort(port uint16)

SetPort sets the port of this URI.

func (URI) String

func (u URI) String() string

String returns the address as a string.

func (URI) Type

func (u URI) Type() string

Type returns the type of a uri.

func (*URI) UnmarshalJSON

func (u *URI) UnmarshalJSON(b []byte) error

UnmarshalJSON unmarshals a byte slice to a URI.

type URIs

type URIs []URI

URIs is a convenience type representing a slice of URI.

func (URIs) HostPortStrings

func (u URIs) HostPortStrings() []string

HostPortStrings returns a slice of host:port strings based on the slice of URI.

type UpdateCoordinatorMessage

type UpdateCoordinatorMessage struct {
	New *Node
}

UpdateCoordinatorMessage is an internal message for reassigning the coordinator.

type ValCount

type ValCount struct {
	Val   int64 `json:"value"`
	Count int64 `json:"count"`
}

ValCount represents a grouping of sum & count for Sum() and Average() calls.

type ViewInfo

type ViewInfo struct {
	Name string `json:"name"`
}

ViewInfo represents schema information for a view.

Documentation was rendered with GOOS=linux and GOARCH=amd64.

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