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package state
import (
"context"
"github.com/moby/swarmkit/v2/api"
)
// A Change includes a version number and a set of store actions from a
// particular log entry.
type Change struct {
StoreActions []api.StoreAction
Version api.Version
}
// A Proposer can propose actions to a cluster.
type Proposer interface {
// ProposeValue adds storeAction to the distributed log. If this
// completes successfully, ProposeValue calls cb to commit the
// proposed changes. The callback is necessary for the Proposer to make
// sure that the changes are committed before it interacts further
// with the store.
ProposeValue(ctx context.Context, storeAction []api.StoreAction, cb func()) error
// GetVersion returns the monotonic index of the most recent item in
// the distributed log.
GetVersion() *api.Version
// ChangesBetween returns the changes starting after "from", up to and
// including "to". If these changes are not available because the log
// has been compacted, an error will be returned.
ChangesBetween(from, to api.Version) ([]Change, error)
}
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