New create a new watcher.

NewCacher create a new cache and initialize it by the given data.

NewSender create a sender and initialze it's cacher by the given data.

CONFIG represents a config watcher, watch /lain/config.

CONTAINER represents a container watcher, it's based on podgroup watcher.

DEPENDS represents a depends watcher, watch /lain/deployd/depends.

NIL represents a nil watcher, which will watch nothing.

NODES represents a node watcher, it's based on podgroup watcher.

PODGROUP represents a podgroup watcher, watch /lain/deployd/pod_groups.

BaseWatcher having a sender, store, and convert function.

Cacher is a simple cache, used to cache converted data from store.

Event represents a watcher event.

Receiver represents a receiver of sender, which can receive data from sender.

Sender having a cache, when the data in cache changed, call Broadcast() sending new data to receivers.

Status of a watcher.

ConvertFunc convert the data from store into a general type.