memory

Documentation

Index

• func New() storage.Storage

Examples

• New
• New (Other)
• New (With_metrics)

Functions

func New

func New() storage.Storage

New creates a new Storage that lives in memory.

This type of storage is intended for testing and demonstration purposes only. Although the implementation is safe for concurrent use, it is not persisted.

Example

mem := New()

mem.LoadOrStore("foo", "bar")
key, _ := mem.Resolve("bar")

fmt.Printf("Key for 'bar' is '%s'\n", key)

Output:

Key for 'bar' is 'foo'

Example (Other)

mem := New()

mem.LoadOrStore("foo", "bar")

value, loaded := mem.LoadOrStore("foo", "42")
key, _ := mem.Resolve("bar")

fmt.Printf("Value of 'foo' is '%s'\n", value)
fmt.Printf("Value of 'foo' was loaded from storage: %t\n", loaded)
fmt.Printf("Key for 'bar' is '%s'\n", key)

_, ok := mem.Resolve("42")

fmt.Printf("Key for '42' could be resolved: %t", ok)

Output:

Value of 'foo' is 'bar'
Value of 'foo' was loaded from storage: true
Key for 'bar' is 'foo'
Key for '42' could be resolved: false

Example (With_metrics)

loadOps := expvar.NewInt("loadOps")
storeOps := expvar.NewInt("storeOps")
resolveOps := expvar.NewInt("resolveOps")

memory := New()
memory.WithMetrics(&storage.Metrics{LoadOps: loadOps, StoreOps: storeOps, ResolveOps: resolveOps})

memory.LoadOrStore("foo", "bar")
fmt.Printf("Load: %d, Store: %d, Resolve: %d\n", loadOps.Value(), storeOps.Value(), resolveOps.Value())

memory.LoadOrStore("foo", "bar")
fmt.Printf("Load: %d, Store: %d, Resolve: %d\n", loadOps.Value(), storeOps.Value(), resolveOps.Value())

memory.Resolve("bar")
fmt.Printf("Load: %d, Store: %d, Resolve: %d\n", loadOps.Value(), storeOps.Value(), resolveOps.Value())

Output:

Load: 0, Store: 1, Resolve: 0
Load: 1, Store: 1, Resolve: 0
Load: 1, Store: 1, Resolve: 1