self

Documentation

Overview

Package self contains codes for recording expvastic's own metrics.

Collected metrics

This list will grow in time:

ElasticSearch Var Name    | expvastic var name
----------------------------------------------
Readers                   | expReaders
Read Jobs                 | readJobs
Record Jobs               | recordJobs
Records Distributed       | recordsDistributed
DataType Objects          | datatypeObjs
DataType Objects Errors   | datatypeErrs
Unidentified JSON Count   | unidentifiedJSON
StringType Count          | stringTypeCount
FloatType Count           | floatTypeCount
GCListType Count          | gcListTypeCount
ByteType Count            | byteTypeCount
Expvar Reads              | expvarReads
ElasticSearch Records     | elasticsearchRecords

Index

• type Config
  • func FromViper(v *viper.Viper, log internal.FieldLogger, name, key string) (*Config, error)
  • func (c *Config) Backoff() int
  • func (c *Config) Endpoint() string
  • func (c *Config) Interval() time.Duration
  • func (c *Config) Logger() internal.FieldLogger
  • func (c *Config) Name() string
  • func (c *Config) NewInstance(ctx context.Context) (reader.DataReader, error)
  • func (c *Config) RoutePath() string
  • func (c *Config) Timeout() time.Duration
  • func (c *Config) TypeName() string
• type Reader
  • func New(log internal.FieldLogger, endpoint string, mapper datatype.Mapper, ...) (*Reader, error)
  • func (r *Reader) Interval() time.Duration
  • func (r *Reader) Mapper() datatype.Mapper
  • func (r *Reader) Name() string
  • func (r *Reader) Ping() error
  • func (r *Reader) Read(job *token.Context) (*reader.Result, error)
  • func (r *Reader) SetTestMode()
  • func (r *Reader) Timeout() time.Duration
  • func (r *Reader) TypeName() string

Types

type Config

type Config struct {
	SelfTypeName string `mapstructure:"type_name"`
	SelfInterval string `mapstructure:"interval"`
	SelfBackoff  int    `mapstructure:"backoff"`
	SelfEndpoint string // this is for testing purposes and you are not supposed to set it
	// contains filtered or unexported fields
}

Config holds the necessary configuration for setting up an self reading facility.

func FromViper

func FromViper(v *viper.Viper, log internal.FieldLogger, name, key string) (*Config, error)

FromViper constructs the necessary configuration for bootstrapping the expvar reader

func (*Config) Backoff

func (c *Config) Backoff() int

Backoff returns the backoff

func (*Config) Endpoint

func (c *Config) Endpoint() string

Endpoint returns the endpoint

func (*Config) Interval

func (c *Config) Interval() time.Duration

Interval returns the interval

func (*Config) Logger

func (c *Config) Logger() internal.FieldLogger

Logger returns the logger

func (*Config) Name

func (c *Config) Name() string

Name returns the name

func (*Config) NewInstance

func (c *Config) NewInstance(ctx context.Context) (reader.DataReader, error)

NewInstance instantiates a SelfReader

func (*Config) RoutePath

func (c *Config) RoutePath() string

RoutePath returns the routepath

func (*Config) Timeout

func (c *Config) Timeout() time.Duration

Timeout returns the timeout

func (*Config) TypeName

func (c *Config) TypeName() string

TypeName returns the typename

type Reader

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

Reader reads from expvastic own application's metric information. It implements DataReader interface.

func New

func New(log internal.FieldLogger, endpoint string, mapper datatype.Mapper, name, typeName string, interval time.Duration, timeout time.Duration, backoff int) (*Reader, error)

New exposes expvastic's own metrics. It returns and error on the following occasions:

Condition        |  Error
-----------------|-------------
name == ""       | ErrEmptyName
endpoint == ""   | ErrEmptyEndpoint
Invalid Endpoint | ErrInvalidEndpoint
typeName == ""   | ErrEmptyTypeName
backoff < 5      | ErrLowBackoffValue

func (*Reader) Interval

func (r *Reader) Interval() time.Duration

Interval returns the interval

func (*Reader) Mapper

func (r *Reader) Mapper() datatype.Mapper

Mapper returns the mapper object

func (*Reader) Name

func (r *Reader) Name() string

Name shows the name identifier for this reader

func (*Reader) Ping

func (r *Reader) Ping() error

Ping pings the endpoint and return nil if was successful. It returns an error if the endpoint is not available.

func (*Reader) Read

func (r *Reader) Read(job *token.Context) (*reader.Result, error)

Read send the metrics back. The error is usually nil.

func (*Reader) SetTestMode

func (r *Reader) SetTestMode()

SetTestMode sets the mode to testing for testing purposes This is because the way self works

func (*Reader) Timeout

func (r *Reader) Timeout() time.Duration

Timeout returns the timeout

func (*Reader) TypeName

func (r *Reader) TypeName() string

TypeName shows the typeName the recorder should record as