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context.go
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context.go
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package workflow
import "github.com/cschleiden/go-workflows/internal/sync"
type CancelFunc = sync.CancelFunc
// WithCancel returns a copy of parent with a new Done channel. The returned
// context's Done channel is closed when the returned cancel function is called
// or when the parent context's Done channel is closed, whichever happens first.
//
// Canceling this context releases resources associated with it, so code should
// call cancel as soon as the operations running in this Context complete.
func WithCancel(parent Context) (ctx Context, cancel CancelFunc) {
return sync.WithCancel(parent)
}
// WithValue returns a copy of parent in which the value associated with key is
// val.
//
// Use context Values only for request-scoped data that transits processes and
// APIs, not for passing optional parameters to functions.
//
// The provided key must be comparable and should not be of type
// string or any other built-in type to avoid collisions between
// packages using context. Users of WithValue should define their own
// types for keys. To avoid allocating when assigning to an
// interface{}, context keys often have concrete type
// struct{}. Alternatively, exported context key variables' static
// type should be a pointer or interface.
func WithValue(parent Context, key, val interface{}) Context {
return sync.WithValue(parent, key, val)
}
// NewDisconnectedContext creates a new context that is disconnected from any parent
// context.
func NewDisconnectedContext(ctx Context) Context {
return sync.NewDisconnectedContext(ctx)
}