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author | Christopher Speller <crspeller@gmail.com> | 2017-05-17 16:51:25 -0400 |
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committer | GitHub <noreply@github.com> | 2017-05-17 16:51:25 -0400 |
commit | d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26 (patch) | |
tree | dbde13123c6add150448f7b75753ac022d862475 /vendor/github.com/hashicorp/memberlist/event_delegate.go | |
parent | cd23b8139a9463b67e3096744321f6f4eb0ca40a (diff) | |
download | chat-d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26.tar.gz chat-d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26.tar.bz2 chat-d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26.zip |
Upgrading server dependancies (#6431)
Diffstat (limited to 'vendor/github.com/hashicorp/memberlist/event_delegate.go')
-rw-r--r-- | vendor/github.com/hashicorp/memberlist/event_delegate.go | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/vendor/github.com/hashicorp/memberlist/event_delegate.go b/vendor/github.com/hashicorp/memberlist/event_delegate.go new file mode 100644 index 000000000..35e2a56fd --- /dev/null +++ b/vendor/github.com/hashicorp/memberlist/event_delegate.go @@ -0,0 +1,61 @@ +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} +} |