32 lines
680 B
Go
32 lines
680 B
Go
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package datastore
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import (
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"code.google.com/p/go.net/context"
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)
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const reqkey = "datastore"
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// NewContext returns a Context whose Value method returns the
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// application's data storage objects.
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func NewContext(parent context.Context, ds Datastore) context.Context {
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return &wrapper{parent, ds}
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}
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type wrapper struct {
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context.Context
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ds Datastore
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}
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// Value returns the named key from the context.
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func (c *wrapper) Value(key interface{}) interface{} {
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if key == reqkey {
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return c.ds
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}
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return c.Context.Value(key)
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}
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// FromContext returns the sql.DB associated with this context.
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func FromContext(c context.Context) Datastore {
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return c.Value(reqkey).(Datastore)
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}
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