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use std::ops::Bound;
use tikv_util::keybuilder::KeyBuilder;
#[derive(Clone)]
pub struct ReadOptions {
fill_cache: bool,
}
impl ReadOptions {
pub fn new() -> ReadOptions {
ReadOptions::default()
}
#[inline]
pub fn fill_cache(&self) -> bool {
self.fill_cache
}
#[inline]
pub fn set_fill_cache(&mut self, v: bool) {
self.fill_cache = v;
}
}
impl Default for ReadOptions {
fn default() -> ReadOptions {
ReadOptions { fill_cache: true }
}
}
#[derive(Clone)]
pub struct WriteOptions {
sync: bool,
no_slowdown: bool,
}
impl WriteOptions {
pub fn new() -> WriteOptions {
WriteOptions {
sync: false,
no_slowdown: false,
}
}
pub fn set_sync(&mut self, sync: bool) {
self.sync = sync;
}
pub fn sync(&self) -> bool {
self.sync
}
pub fn set_no_slowdown(&mut self, no_slowdown: bool) {
self.no_slowdown = no_slowdown;
}
pub fn no_slowdown(&self) -> bool {
self.no_slowdown
}
}
impl Default for WriteOptions {
fn default() -> WriteOptions {
WriteOptions {
sync: false,
no_slowdown: false,
}
}
}
#[derive(Clone, PartialEq)]
pub enum SeekMode {
TotalOrder,
Prefix,
}
#[derive(Clone)]
pub struct IterOptions {
lower_bound: Option<KeyBuilder>,
upper_bound: Option<KeyBuilder>,
prefix_same_as_start: bool,
fill_cache: bool,
hint_min_ts: Option<u64>,
hint_max_ts: Option<u64>,
key_only: bool,
seek_mode: SeekMode,
max_skippable_internal_keys: u64,
}
impl IterOptions {
pub fn new(
lower_bound: Option<KeyBuilder>,
upper_bound: Option<KeyBuilder>,
fill_cache: bool,
) -> IterOptions {
IterOptions {
lower_bound,
upper_bound,
prefix_same_as_start: false,
fill_cache,
hint_min_ts: None,
hint_max_ts: None,
key_only: false,
seek_mode: SeekMode::TotalOrder,
max_skippable_internal_keys: 0,
}
}
#[inline]
pub fn prefix_seek_used(&self) -> bool {
self.seek_mode == SeekMode::Prefix
}
#[inline]
pub fn use_prefix_seek(&mut self) {
self.seek_mode = SeekMode::Prefix;
}
#[inline]
pub fn total_order_seek_used(&self) -> bool {
self.seek_mode == SeekMode::TotalOrder
}
#[inline]
pub fn fill_cache(&self) -> bool {
self.fill_cache
}
#[inline]
pub fn set_fill_cache(&mut self, v: bool) {
self.fill_cache = v;
}
#[inline]
pub fn set_hint_min_ts(&mut self, bound_ts: Bound<u64>) {
match bound_ts {
Bound::Included(ts) => self.hint_min_ts = Some(ts),
Bound::Excluded(ts) => self.hint_min_ts = Some(ts + 1),
Bound::Unbounded => self.hint_min_ts = None,
}
}
#[inline]
pub fn hint_min_ts(&self) -> Option<u64> {
self.hint_min_ts
}
#[inline]
pub fn hint_max_ts(&self) -> Option<u64> {
self.hint_max_ts
}
#[inline]
pub fn set_hint_max_ts(&mut self, bound_ts: Bound<u64>) {
match bound_ts {
Bound::Included(ts) => self.hint_max_ts = Some(ts),
Bound::Excluded(ts) => self.hint_max_ts = Some(ts - 1),
Bound::Unbounded => self.hint_max_ts = None,
}
}
#[inline]
pub fn key_only(&self) -> bool {
self.key_only
}
#[inline]
pub fn set_key_only(&mut self, v: bool) {
self.key_only = v;
}
#[inline]
pub fn lower_bound(&self) -> Option<&[u8]> {
self.lower_bound.as_ref().map(|v| v.as_slice())
}
#[inline]
pub fn set_lower_bound(&mut self, bound: &[u8], reserved_prefix_len: usize) {
let builder = KeyBuilder::from_slice(bound, reserved_prefix_len, 0);
self.lower_bound = Some(builder);
}
pub fn set_vec_lower_bound(&mut self, bound: Vec<u8>) {
self.lower_bound = Some(KeyBuilder::from_vec(bound, 0, 0));
}
pub fn set_lower_bound_prefix(&mut self, prefix: &[u8]) {
if let Some(ref mut builder) = self.lower_bound {
builder.set_prefix(prefix);
}
}
#[inline]
pub fn upper_bound(&self) -> Option<&[u8]> {
self.upper_bound.as_ref().map(|v| v.as_slice())
}
#[inline]
pub fn set_upper_bound(&mut self, bound: &[u8], reserved_prefix_len: usize) {
let builder = KeyBuilder::from_slice(bound, reserved_prefix_len, 0);
self.upper_bound = Some(builder);
}
pub fn set_vec_upper_bound(&mut self, bound: Vec<u8>) {
self.upper_bound = Some(KeyBuilder::from_vec(bound, 0, 0));
}
pub fn set_upper_bound_prefix(&mut self, prefix: &[u8]) {
if let Some(ref mut builder) = self.upper_bound {
builder.set_prefix(prefix);
}
}
#[inline]
pub fn build_bounds(self) -> (Option<Vec<u8>>, Option<Vec<u8>>) {
let lower = self.lower_bound.map(KeyBuilder::build);
let upper = self.upper_bound.map(KeyBuilder::build);
(lower, upper)
}
#[inline]
pub fn prefix_same_as_start(&self) -> bool {
self.prefix_same_as_start
}
#[inline]
pub fn set_prefix_same_as_start(&mut self, enable: bool) {
self.prefix_same_as_start = enable;
}
#[inline]
pub fn max_skippable_internal_keys(&self) -> u64 {
self.max_skippable_internal_keys
}
#[inline]
pub fn set_max_skippable_internal_keys(&mut self, threshold: u64) {
self.max_skippable_internal_keys = threshold;
}
}
impl Default for IterOptions {
fn default() -> IterOptions {
IterOptions {
lower_bound: None,
upper_bound: None,
prefix_same_as_start: false,
fill_cache: true,
hint_min_ts: None,
hint_max_ts: None,
key_only: false,
seek_mode: SeekMode::TotalOrder,
max_skippable_internal_keys: 0,
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::ops::Bound;
#[test]
fn test_hint_ts() {
let mut ops = IterOptions::default();
assert_eq!(ops.hint_min_ts(), None);
assert_eq!(ops.hint_max_ts(), None);
ops.set_hint_min_ts(Bound::Included(1));
ops.set_hint_max_ts(Bound::Included(10));
assert_eq!(ops.hint_min_ts(), Some(1));
assert_eq!(ops.hint_max_ts(), Some(10));
ops.set_hint_min_ts(Bound::Excluded(1));
ops.set_hint_max_ts(Bound::Excluded(10));
assert_eq!(ops.hint_min_ts(), Some(2));
assert_eq!(ops.hint_max_ts(), Some(9));
}
}