caching

package

v0.3.0 Latest Latest Go to latest Published: Nov 19, 2024 License: MIT Imports: 7 Imported by: 0

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Valid go.mod file
Redistributable license
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Repository

github.com/Azure/iot-operations-sdks

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Documentation ¶

Overview ¶

Copyright (c) Microsoft Corporation. Licensed under the MIT License.

Index ¶

Constants
type Cache
- func New(clock Clock, ttl time.Duration, requestTopic string) *Cache
- func (c *Cache) Exec(req *mqtt.Message, cb Callback) (*mqtt.Message, error)
type Callback
type Clock

Constants ¶

View Source

const (
	// TODO: Verify where these values come from?
	FixedProcessingOverheadMs = 10
	FixedStorageOverheadBytes = 100
	MaxEntryCount             = 10000
	MaxAggregatePayloadBytes  = 10000000
)

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type Cache ¶

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

func New ¶

func New(clock Clock, ttl time.Duration, requestTopic string) *Cache

New creates a new cache.

func (*Cache) Exec ¶ added in v0.1.1

func (c *Cache) Exec(req *mqtt.Message, cb Callback) (*mqtt.Message, error)

Exec will return the cached response message, executing the provided function to produce it if necessary. A nil message with no error indicates that the request should be dropped, e.g. if it has expired or a duplicate request is already in-flight.

type Callback ¶ added in v0.1.1

type Callback = func() (*mqtt.Message, error)

type Clock ¶ added in v0.1.1

type Clock interface {
	Now() time.Time
}

Clock used for test dependency injection.

Source Files ¶

View all Source files

cache.go

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