/usr/share/gocode/src/github.com/hashicorp/serf/vendor/github.com/hashicorp/memberlist/event_delegate.go is in golang-github-hashicorp-serf-dev 0.8.1+git20171021.c20a0b1~ds1-4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | package memberlist
// EventDelegate is a simpler delegate that is used only to receive
// notifications about members joining and leaving. The methods in this
// delegate may be called by multiple goroutines, but never concurrently.
// This allows you to reason about ordering.
type EventDelegate interface {
// NotifyJoin is invoked when a node is detected to have joined.
// The Node argument must not be modified.
NotifyJoin(*Node)
// NotifyLeave is invoked when a node is detected to have left.
// The Node argument must not be modified.
NotifyLeave(*Node)
// NotifyUpdate is invoked when a node is detected to have
// updated, usually involving the meta data. The Node argument
// must not be modified.
NotifyUpdate(*Node)
}
// ChannelEventDelegate is used to enable an application to receive
// events about joins and leaves over a channel instead of a direct
// function call.
//
// Care must be taken that events are processed in a timely manner from
// the channel, since this delegate will block until an event can be sent.
type ChannelEventDelegate struct {
Ch chan<- NodeEvent
}
// NodeEventType are the types of events that can be sent from the
// ChannelEventDelegate.
type NodeEventType int
const (
NodeJoin NodeEventType = iota
NodeLeave
NodeUpdate
)
// NodeEvent is a single event related to node activity in the memberlist.
// The Node member of this struct must not be directly modified. It is passed
// as a pointer to avoid unnecessary copies. If you wish to modify the node,
// make a copy first.
type NodeEvent struct {
Event NodeEventType
Node *Node
}
func (c *ChannelEventDelegate) NotifyJoin(n *Node) {
c.Ch <- NodeEvent{NodeJoin, n}
}
func (c *ChannelEventDelegate) NotifyLeave(n *Node) {
c.Ch <- NodeEvent{NodeLeave, n}
}
func (c *ChannelEventDelegate) NotifyUpdate(n *Node) {
c.Ch <- NodeEvent{NodeUpdate, n}
}
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