harness-drone/queue/queue.go
2015-05-05 01:04:20 -07:00

34 lines
1 KiB
Go

package queue
type Queue interface {
// Publish inserts work at the tail of this queue, waiting for
// space to become available if the queue is full.
Publish(*Work) error
// Remove removes the specified work item from this queue,
// if it is present.
Remove(*Work) error
// Pull retrieves and removes the head of this queue, waiting
// if necessary until work becomes available.
Pull() *Work
// PullClose retrieves and removes the head of this queue,
// waiting if necessary until work becomes available. The
// CloseNotifier should be provided to clone the channel
// if the subscribing client terminates its connection.
PullClose(CloseNotifier) *Work
// Ack acknowledges an item in the queue was processed.
Ack(*Work) error
// Items returns a slice containing all of the work in this
// queue, in proper sequence.
Items() []*Work
}
type CloseNotifier interface {
// CloseNotify returns a channel that receives a single value
// when the client connection has gone away.
CloseNotify() <-chan bool
}