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pkg/storage: introduce storage.Backend Watch method (#1135)

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Currently, we're doing "sync" in databroker server. If we're going to
support multiple databroker servers instance, this mechanism won't work.

This commit moves the "sync" to storage backend, by adding new Watch
method. The Watch method will return a channel for the caller. Everytime
something happens inside the storage, we notify the caller by sending a
message to this channel.
This commit is contained in:
Cuong Manh Le 2020-07-27 21:10:47 +07:00 • committed by GitHub
parent d9711c8055
commit a7bd2caae9
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10 changed files with 204 additions and 44 deletions
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5
pkg/storage/storage.go
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@ -29,4 +29,9 @@ type Backend interface {
// ClearDeleted is used clear marked delete records.
ClearDeleted(ctx context.Context, cutoff time.Time)
// Watch returns a channel to the caller. The channel is used to notify
// about changes that happen in storage. When ctx is finished, Watch will close
// the channel.
Watch(ctx context.Context) chan struct{}
}