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go-cache
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Fixed widths in top section of cache.go

This commit is contained in:
Patrick Mylund Nielsen 2012-01-15 12:16:10 -06:00
parent a4f5f9088b
commit d05b5eb27a
1 changed files with 32 additions and 29 deletions
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61
cache.go
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@ -1,32 +1,26 @@
package cache
import (
"fmt"
"reflect"
"runtime"
"sync"
"time"
)
// go-cache is an in-memory key:value store/cache similar to memcached that is suitable for
// applications running on a single machine. Any object can be stored, for a given duration
// or forever, and the cache can be used safely by multiple goroutines.
// go-cache is an in-memory key:value store/cache similar to memcached that is
// suitable for applications running on a single machine. Any object can be stored,
// for a given duration or forever, and the cache can be used safely by multiple
// goroutines.
//
// Installation:
// == Installation
// goinstall github.com/pmylund/go-cache
//
// Usage:
// == Usage
// import "github.com/pmylund/go-cache"
//
// // Create a cache with a default expiration time of 5 minutes, and which purges
// // expired items every 30 seconds
// // Create a cache with a default expiration time of 5 minutes, and which
// // purges expired items every 30 seconds
// c := cache.New(5*time.Minute, 30*time.Second)
//
// // Set the value of the key "foo" to "bar", with the default expiration time
// c.Set("foo", "bar", 0)
//
// // Set the value of the key "baz" to "yes", with no expiration time (the item
// // won't be removed until it is re-set, or removed using c.Delete("baz")
// // Set the value of the key "baz" to "yes", with no expiration time
// // (the item won't be removed until it is re-set, or removed using
// // c.Delete("baz")
// c.Set("baz", "yes", -1)
//
// // Get the string associated with the key "foo" from the cache
@ -35,17 +29,18 @@ import (
// fmt.Println(foo)
// }
//
// // Since Go is statically typed, and cache values can be anything, type assertion
// // is needed when values are being passed to functions that don't take arbitrary types,
// // (i.e. interface{}). The simplest way to do this for values which will only be used
// // once--e.g. for passing to another function--is:
// // Since Go is statically typed, and cache values can be anything, type
// // assertion is needed when values are being passed to functions that don't
// // take arbitrary types, (i.e. interface{}). The simplest way to do this for
// // values which will only be used once--e.g. for passing to another
// // function--is:
// foo, found := c.Get("foo")
// if found {
// MyFunction(foo.(string))
// }
//
// // This gets tedious if the value is used several times in the same function. You
// // might do either of the following instead:
// // This gets tedious if the value is used several times in the same function.
// // You might do either of the following instead:
// if x, found := c.Get("foo"); found {
// foo := x.(string)
// ...
@ -65,11 +60,11 @@ import (
// ...
// }
//
// If you store a reference type like a pointer, slice, map or channel, you do not need to
// run Set if you modify the underlying data. The cache does not serialize its data, so if
// you modify a struct whose pointer you've stored in the cache, retrieving that pointer
// with Get will point you to the same data:
//
// // If you store a reference type like a pointer, slice, map or channel, you
// // do not need to run Set if you modify the underlying data. The cache does
// // not serialize its data, so if you modify a struct whose pointer you've
// // stored in the cache, retrieving that pointer with Get will point you to
// // the same data:
// foo := &MyStruct{Num: 1}
// c.Set("foo", foo, 0)
// ...
@ -83,10 +78,18 @@ import (
// foo := x.(*MyStruct)
// foo.Println(foo.Num)
//
// will print:
// // will print:
// 1
// 2
import (
"fmt"
"reflect"
"runtime"
"sync"
"time"
)
type Cache struct {
*cache
// If this is confusing, see the comment at the bottom of the New() function