package wal

import (
	"time"
)

type Info struct {
	FirstSeqNum     int64
	LastSeqNum      int64
	LastTimestampMS int64
}

type Iterator interface {
	// Next will return false if no record is available during the timeout
	// period, or if an error is encountered. After Next returns false, the
	// caller should check the return value of the Error function.
	Next(timeout time.Duration) bool

	// Call Record after Next returns true to get the next record.
	Record() Record

	// The caller must call Close on the iterator so clean-up can be performed.
	Close()

	// Call Error to see if there was an error during the previous call to Next
	// if Next returned false.
	Error() error
}