39 lines
1.4 KiB
Go
39 lines
1.4 KiB
Go
package batch
|
|
|
|
import "github.com/lightningnetwork/lnd/channeldb/kvdb"
|
|
|
|
// Request defines an operation that can be batched into a single bbolt
|
|
// transaction.
|
|
type Request struct {
|
|
// Reset is called before each invocation of Update and is used to clear
|
|
// any possible modifications to local state as a result of previous
|
|
// calls to Update that were not committed due to a concurrent batch
|
|
// failure.
|
|
//
|
|
// NOTE: This field is optional.
|
|
Reset func()
|
|
|
|
// Update is applied alongside other operations in the batch.
|
|
//
|
|
// NOTE: This method MUST NOT acquire any mutexes.
|
|
Update func(tx kvdb.RwTx) error
|
|
|
|
// OnCommit is called if the batch or a subset of the batch including
|
|
// this request all succeeded without failure. The passed error should
|
|
// contain the result of the transaction commit, as that can still fail
|
|
// even if none of the closures returned an error.
|
|
//
|
|
// NOTE: This field is optional.
|
|
OnCommit func(commitErr error) error
|
|
}
|
|
|
|
// Scheduler abstracts a generic batching engine that accumulates an incoming
|
|
// set of Requests, executes them, and returns the error from the operation.
|
|
type Scheduler interface {
|
|
// Execute schedules a Request for execution with the next available
|
|
// batch. This method blocks until the the underlying closure has been
|
|
// run against the databse. The resulting error is returned to the
|
|
// caller.
|
|
Execute(req *Request) error
|
|
}
|