handler

package
Version: v0.14.0 Latest Latest
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Published: Oct 15, 2019 License: Apache-2.0 Imports: 19 Imported by: 35

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Index

Constants

View Source
const (
	// StepParam is the step parameter.
	StepParam = "step"
	// LookbackParam is the lookback parameter.
	LookbackParam = "lookback"
)
View Source
const (
	// WarningsHeader is the M3 warnings header when to display a warning to a user.
	WarningsHeader = "M3-Warnings"

	// RetryHeader is the M3 retry header to display when it is safe to retry.
	RetryHeader = "M3-Retry"

	// ServedByHeader is the M3 query storage execution breakdown.
	ServedByHeader = "M3-Storage-By"

	// DeprecatedHeader is the M3 deprecated header.
	DeprecatedHeader = "M3-Deprecated"

	// LimitMaxSeriesHeader is the M3 limit timeseries header that limits
	// the number of time series returned by each storage node.
	LimitMaxSeriesHeader = "M3-Limit-Max-Series"

	// MetricsTypeHeader sets the write or read metrics type to restrict
	// metrics to.
	// Valid values are "unaggregated" or "aggregated".
	MetricsTypeHeader = "M3-Metrics-Type"

	// MetricsStoragePolicyHeader specifies the resolution and retention of
	// metrics being written or read.
	// In the form of a storage policy string, e.g. "1m:14d".
	// Only required if the metrics type header does not specify unaggregated
	// metrics type.
	MetricsStoragePolicyHeader = "M3-Storage-Policy"

	// UnaggregatedStoragePolicy specifies the unaggregated storage policy.
	UnaggregatedStoragePolicy = "unaggregated"

	// DefaultServiceEnvironment is the default service ID environment.
	DefaultServiceEnvironment = "default_env"
	// DefaultServiceZone is the default service ID zone.
	DefaultServiceZone = "embedded"

	// HeaderClusterEnvironmentName is the header used to specify the environment
	// name.
	HeaderClusterEnvironmentName = "Cluster-Environment-Name"
	// HeaderClusterZoneName is the header used to specify the zone name.
	HeaderClusterZoneName = "Cluster-Zone-Name"
	// HeaderDryRun is the header used to specify whether this should be a dry
	// run.
	HeaderDryRun = "Dry-Run"
	// HeaderForce is the header used to specify whether this should be a forced operation.
	HeaderForce = "Force"

	// LimitHeader is the header added when returned series are limited.
	LimitHeader = "M3-Results-Limited"

	// LimitHeaderSeriesLimitApplied is the header applied when fetch results are
	// maxed.
	LimitHeaderSeriesLimitApplied = "max_fetch_series_limit_applied"
)
View Source
const (
	// M3DBServiceName is the service name for M3DB.
	M3DBServiceName = "m3db"
	// M3AggregatorServiceName is the service name for M3Aggregator.
	M3AggregatorServiceName = "m3aggregator"
	// M3CoordinatorServiceName is the service name for M3Coordinator.
	M3CoordinatorServiceName = "m3coordinator"
)
View Source
const (
	// SearchURL is the url to search for metric ids
	SearchURL = "/search"

	// SearchHTTPMethod is the HTTP method used with this resource.
	SearchHTTPMethod = http.MethodPost
)

Variables

This section is empty.

Functions

func AddWarningHeaders added in v0.14.0

func AddWarningHeaders(w http.ResponseWriter, meta block.ResultMetadata)

AddWarningHeaders adds any warning headers present in the result's metadata. No-op if no warnings encountered.

func AllowedServices added in v0.7.0

func AllowedServices() []string

AllowedServices returns the list of valid M3 services.

func CloseWatcher

func CloseWatcher(
	ctx context.Context,
	cancel context.CancelFunc,
	w http.ResponseWriter,
	instrumentOpts instrument.Options,
)

CloseWatcher watches for CloseNotify and context timeout. It is best effort and may sometimes not close the channel relying on gc

func IsAllowedService added in v0.7.0

func IsAllowedService(svc string) bool

IsAllowedService returns whether a service name is a valid M3 service.

func NewSearchHandler

func NewSearchHandler(
	storage storage.Storage,
	fetchOptionsBuilder FetchOptionsBuilder,
	instrumentOpts instrument.Options,
) http.Handler

NewSearchHandler returns a new instance of handler

func ParseDuration added in v0.11.0

func ParseDuration(r *http.Request, key string) (time.Duration, error)

ParseDuration parses a duration HTTP parameter. nolint: unparam

func ParseLimit added in v0.14.0

func ParseLimit(req *http.Request, defaultLimit int) (int, error)

ParseLimit parses request limit from either header or query string.

func ParseLookbackDuration added in v0.11.0

func ParseLookbackDuration(r *http.Request) (time.Duration, bool, error)

ParseLookbackDuration parses a lookback duration for an HTTP request.

func ParseStep added in v0.11.0

func ParseStep(r *http.Request) (time.Duration, bool, error)

ParseStep parses the step duration for an HTTP request.

Types

type FetchOptionsBuilder added in v0.9.2

type FetchOptionsBuilder interface {
	// NewFetchOptions parses an http request into fetch options.
	NewFetchOptions(req *http.Request) (*storage.FetchOptions, *xhttp.ParseError)
}

FetchOptionsBuilder builds fetch options based on a request and default config.

func NewFetchOptionsBuilder added in v0.9.2

func NewFetchOptionsBuilder(
	opts FetchOptionsBuilderOptions,
) FetchOptionsBuilder

NewFetchOptionsBuilder returns a new fetch options builder.

type FetchOptionsBuilderOptions added in v0.9.2

type FetchOptionsBuilderOptions struct {
	Limit int
}

FetchOptionsBuilderOptions provides options to use when creating a fetch options builder.

type HeaderKeyType added in v0.4.5

type HeaderKeyType int

HeaderKeyType is the type for the header key

const (
	// HeaderKey is the key which headers will be added to in the request context
	HeaderKey HeaderKeyType = iota

	// RoutePrefixV1 is the v1 prefix for all coordinator routes
	RoutePrefixV1 = "/api/v1"
)

type M3AggServiceOptions added in v0.7.0

type M3AggServiceOptions struct {
	MaxAggregationWindowSize time.Duration
	WarmupDuration           time.Duration
}

M3AggServiceOptions contains the service options that are specific to the M3Agg service.

type SearchHandler

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

SearchHandler represents a handler for the search endpoint

func (*SearchHandler) ServeHTTP

func (h *SearchHandler) ServeHTTP(w http.ResponseWriter, r *http.Request)

type ServiceNameAndDefaults added in v0.14.0

type ServiceNameAndDefaults struct {
	ServiceName string
	Defaults    []ServiceOptionsDefault
}

ServiceNameAndDefaults is the params used when identifying a service and it's service option defaults.

type ServiceOptions added in v0.7.0

type ServiceOptions struct {
	ServiceName        string
	ServiceEnvironment string
	ServiceZone        string

	M3Agg *M3AggServiceOptions

	DryRun bool
	Force  bool
}

ServiceOptions are the options for Service.

func NewServiceOptions added in v0.7.0

func NewServiceOptions(
	service ServiceNameAndDefaults,
	headers http.Header,
	m3AggOpts *M3AggServiceOptions,
) ServiceOptions

NewServiceOptions returns a ServiceOptions based on the provided values.

func (*ServiceOptions) ServiceID added in v0.7.0

func (opts *ServiceOptions) ServiceID() services.ServiceID

ServiceID constructs a cluster services ID from the options.

func (*ServiceOptions) Validate added in v0.7.0

func (opts *ServiceOptions) Validate() error

Validate ensures the service options are valid.

type ServiceOptionsDefault added in v0.14.0

type ServiceOptionsDefault func(o ServiceOptions) ServiceOptions

ServiceOptionsDefault is a default to apply to service options.

func WithDefaultServiceEnvironment added in v0.14.0

func WithDefaultServiceEnvironment(env string) ServiceOptionsDefault

WithDefaultServiceEnvironment returns the default service environment.

func WithDefaultServiceZone added in v0.14.0

func WithDefaultServiceZone(zone string) ServiceOptionsDefault

WithDefaultServiceZone returns the default service zone.

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