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moonfire-nvr/db/db.rs

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// This file is part of Moonfire NVR, a security camera digital video recorder.
// Copyright (C) 2016 Scott Lamb <slamb@slamb.org>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// In addition, as a special exception, the copyright holders give
// permission to link the code of portions of this program with the
// OpenSSL library under certain conditions as described in each
// individual source file, and distribute linked combinations including
// the two.
//
// You must obey the GNU General Public License in all respects for all
// of the code used other than OpenSSL. If you modify file(s) with this
// exception, you may extend this exception to your version of the
// file(s), but you are not obligated to do so. If you do not wish to do
// so, delete this exception statement from your version. If you delete
// this exception statement from all source files in the program, then
// also delete it here.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//! Database access logic for the Moonfire NVR SQLite schema.
//!
//! The SQLite schema includes everything except the actual video samples (see the `dir` module
//! for management of those). See `schema.sql` for a more detailed description.
//!
//! The `Database` struct caches data in RAM, making the assumption that only one process is
//! accessing the database at a time. Performance and efficiency notes:
//!
//! * several query operations here feature row callbacks. The callback is invoked with
//! the database lock. Thus, the callback shouldn't perform long-running operations.
//!
//! * startup may be slow, as it scans the entire index for the recording table. This seems
//! acceptable.
//!
//! * the operations used for web file serving should return results with acceptable latency.
//!
//! * however, the database lock may be held for longer than is acceptable for
//! the critical path of recording frames. The caller should preallocate sample file uuids
//! and such to avoid database operations in these paths.
//!
//! * adding and removing recordings done during normal operations use a batch interface.
//! A list of mutations is built up in-memory and occasionally flushed to reduce SSD write
//! cycles.
use base::clock::{self, Clocks};
use dir;
use failure::Error;
use fnv::{self, FnvHashMap, FnvHashSet};
use lru_cache::LruCache;
use openssl::hash;
use parking_lot::{Mutex,MutexGuard};
use raw;
use recording::{self, TIME_UNITS_PER_SEC};
use rusqlite;
use schema;
use std::collections::{BTreeMap, VecDeque};
use std::cell::RefCell;
use std::cmp;
use std::io::Write;
use std::ops::Range;
use std::mem;
use std::str;
use std::string::String;
use std::sync::Arc;
use std::vec::Vec;
use time;
use uuid::Uuid;
/// Expected schema version. See `guide/schema.md` for more information.
pub const EXPECTED_VERSION: i32 = 3;
const GET_RECORDING_PLAYBACK_SQL: &'static str = r#"
select
video_index
from
recording_playback
where
composite_id = :composite_id
"#;
const INSERT_VIDEO_SAMPLE_ENTRY_SQL: &'static str = r#"
insert into video_sample_entry (sha1, width, height, rfc6381_codec, data)
values (:sha1, :width, :height, :rfc6381_codec, :data)
"#;
const UPDATE_NEXT_RECORDING_ID_SQL: &'static str =
"update stream set next_recording_id = :next_recording_id where id = :stream_id";
pub struct FromSqlUuid(pub Uuid);
impl rusqlite::types::FromSql for FromSqlUuid {
fn column_result(value: rusqlite::types::ValueRef) -> rusqlite::types::FromSqlResult<Self> {
let uuid = Uuid::from_bytes(value.as_blob()?)
.map_err(|e| rusqlite::types::FromSqlError::Other(Box::new(e)))?;
Ok(FromSqlUuid(uuid))
}
}
struct VideoIndex(Box<[u8]>);
impl rusqlite::types::FromSql for VideoIndex {
fn column_result(value: rusqlite::types::ValueRef) -> rusqlite::types::FromSqlResult<Self> {
let blob = value.as_blob()?;
let len = blob.len();
let mut v = Vec::with_capacity(len);
unsafe { v.set_len(len) };
v.copy_from_slice(blob);
Ok(VideoIndex(v.into_boxed_slice()))
}
}
/// A concrete box derived from a ISO/IEC 14496-12 section 8.5.2 VisualSampleEntry box. Describes
/// the codec, width, height, etc.
#[derive(Debug)]
pub struct VideoSampleEntry {
pub data: Vec<u8>,
pub rfc6381_codec: String,
pub id: i32,
pub width: u16,
pub height: u16,
pub sha1: [u8; 20],
}
/// A row used in `list_recordings_by_time` and `list_recordings_by_id`.
#[derive(Debug)]
pub struct ListRecordingsRow {
pub start: recording::Time,
pub video_sample_entry_id: i32,
pub id: CompositeId,
/// This is a recording::Duration, but a single recording's duration fits into an i32.
pub duration_90k: i32,
pub video_samples: i32,
pub video_sync_samples: i32,
pub sample_file_bytes: i32,
pub run_offset: i32,
pub open_id: u32,
pub flags: i32,
}
/// A row used in `list_aggregated_recordings`.
#[derive(Clone, Debug)]
pub struct ListAggregatedRecordingsRow {
pub time: Range<recording::Time>,
pub ids: Range<i32>,
pub video_samples: i64,
pub video_sync_samples: i64,
pub sample_file_bytes: i64,
pub video_sample_entry_id: i32,
pub stream_id: i32,
pub run_start_id: i32,
pub open_id: u32,
pub first_uncommitted: Option<i32>,
pub growing: bool,
}
/// Select fields from the `recordings_playback` table. Retrieve with `with_recording_playback`.
#[derive(Debug)]
pub struct RecordingPlayback<'a> {
pub video_index: &'a [u8],
}
/// Bitmask in the `flags` field in the `recordings` table; see `schema.sql`.
pub enum RecordingFlags {
TrailingZero = 1,
// These values (starting from high bit on down) are never written to the database.
Growing = 1 << 30,
Uncommitted = 1 << 31,
}
/// A recording to pass to `insert_recording`.
#[derive(Clone, Debug, Default)]
pub struct RecordingToInsert {
pub run_offset: i32,
pub flags: i32,
pub sample_file_bytes: i32,
pub start: recording::Time,
pub duration_90k: i32, // a recording::Duration, but guaranteed to fit in i32.
pub local_time_delta: recording::Duration,
pub video_samples: i32,
pub video_sync_samples: i32,
pub video_sample_entry_id: i32,
pub video_index: Vec<u8>,
pub sample_file_sha1: [u8; 20],
}
impl RecordingToInsert {
fn to_list_row(&self, id: CompositeId, open_id: u32) -> ListRecordingsRow {
ListRecordingsRow {
start: self.start,
video_sample_entry_id: self.video_sample_entry_id,
id,
duration_90k: self.duration_90k,
video_samples: self.video_samples,
video_sync_samples: self.video_sync_samples,
sample_file_bytes: self.sample_file_bytes,
run_offset: self.run_offset,
open_id,
flags: self.flags | RecordingFlags::Uncommitted as i32,
}
}
}
/// A row used in `raw::list_oldest_recordings` and `db::delete_oldest_recordings`.
#[derive(Copy, Clone, Debug)]
pub(crate) struct ListOldestRecordingsRow {
pub id: CompositeId,
pub start: recording::Time,
pub duration: i32,
pub sample_file_bytes: i32,
}
/// A calendar day in `YYYY-mm-dd` format.
#[derive(Copy, Clone, Debug, Eq, Ord, PartialEq, PartialOrd)]
pub struct StreamDayKey([u8; 10]);
impl StreamDayKey {
fn new(tm: time::Tm) -> Result<Self, Error> {
let mut s = StreamDayKey([0u8; 10]);
write!(&mut s.0[..], "{}", tm.strftime("%Y-%m-%d")?)?;
Ok(s)
}
pub fn bounds(&self) -> Range<recording::Time> {
let mut my_tm = time::strptime(self.as_ref(), "%Y-%m-%d").expect("days must be parseable");
my_tm.tm_utcoff = 1; // to the time crate, values != 0 mean local time.
my_tm.tm_isdst = -1;
let start = recording::Time(my_tm.to_timespec().sec * recording::TIME_UNITS_PER_SEC);
my_tm.tm_hour = 0;
my_tm.tm_min = 0;
my_tm.tm_sec = 0;
my_tm.tm_mday += 1;
let end = recording::Time(my_tm.to_timespec().sec * recording::TIME_UNITS_PER_SEC);
start .. end
}
}
impl AsRef<str> for StreamDayKey {
fn as_ref(&self) -> &str { str::from_utf8(&self.0[..]).expect("days are always UTF-8") }
}
/// In-memory state about a particular camera on a particular day.
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct StreamDayValue {
/// The number of recordings that overlap with this day. Note that `adjust_day` automatically
/// prunes days with 0 recordings.
pub recordings: i64,
/// The total duration recorded on this day. This can be 0; because frames' durations are taken
/// from the time of the next frame, a recording that ends unexpectedly after a single frame
/// will have 0 duration of that frame and thus the whole recording.
pub duration: recording::Duration,
}
#[derive(Debug)]
pub struct SampleFileDir {
pub id: i32,
pub path: String,
pub uuid: Uuid,
dir: Option<Arc<dir::SampleFileDir>>,
last_complete_open: Option<Open>,
to_gc: Vec<CompositeId>,
pub(crate) garbage: FnvHashSet<CompositeId>,
}
impl SampleFileDir {
/// Returns a cloned copy of the directory, or Err if closed.
///
/// Use `LockedDatabase::open_sample_file_dirs` prior to calling this method.
pub fn get(&self) -> Result<Arc<dir::SampleFileDir>, Error> {
Ok(self.dir
.as_ref()
.ok_or_else(|| format_err!("sample file dir {} is closed", self.id))?
.clone())
}
/// Returns expected existing metadata when opening this directory.
fn meta(&self, db_uuid: &Uuid) -> schema::DirMeta {
let mut meta = schema::DirMeta::default();
meta.db_uuid.extend_from_slice(&db_uuid.as_bytes()[..]);
meta.dir_uuid.extend_from_slice(&self.uuid.as_bytes()[..]);
if let Some(o) = self.last_complete_open {
let open = meta.mut_last_complete_open();
open.id = o.id;
open.uuid.extend_from_slice(&o.uuid.as_bytes()[..]);
}
meta
}
}
/// In-memory state about a camera.
#[derive(Debug)]
pub struct Camera {
pub id: i32,
pub uuid: Uuid,
pub short_name: String,
pub description: String,
pub host: String,
pub username: String,
pub password: String,
pub streams: [Option<i32>; 2],
}
#[derive(Copy, Clone, Debug)]
pub enum StreamType { MAIN, SUB }
impl StreamType {
pub fn from_index(i: usize) -> Option<Self> {
match i {
0 => Some(StreamType::MAIN),
1 => Some(StreamType::SUB),
_ => None,
}
}
pub fn index(self) -> usize {
match self {
StreamType::MAIN => 0,
StreamType::SUB => 1,
}
}
pub fn as_str(self) -> &'static str {
match self {
StreamType::MAIN => "main",
StreamType::SUB => "sub",
}
}
pub fn parse(type_: &str) -> Option<Self> {
match type_ {
"main" => Some(StreamType::MAIN),
"sub" => Some(StreamType::SUB),
_ => None,
}
}
}
impl ::std::fmt::Display for StreamType {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
f.write_str(self.as_str())
}
}
pub const ALL_STREAM_TYPES: [StreamType; 2] = [StreamType::MAIN, StreamType::SUB];
#[derive(Clone, Debug)]
pub struct Stream {
pub id: i32,
pub camera_id: i32,
pub sample_file_dir_id: Option<i32>,
pub type_: StreamType,
pub rtsp_path: String,
pub retain_bytes: i64,
pub flush_if_sec: i64,
/// The time range of recorded data associated with this stream (minimum start time and maximum
/// end time). `None` iff there are no recordings for this camera.
pub range: Option<Range<recording::Time>>,
pub sample_file_bytes: i64,
/// On flush, delete the following recordings. Note they must be the oldest recordings.
to_delete: Vec<ListOldestRecordingsRow>,
/// The total bytes to delete with the next flush.
pub bytes_to_delete: i64,
/// The total bytes to add with the next flush. (`mark_synced` has already been called on these
/// recordings.)
pub bytes_to_add: i64,
/// The total duration of recorded data. This may not be `range.end - range.start` due to
/// gaps and overlap.
pub duration: recording::Duration,
/// Mapping of calendar day (in the server's time zone) to a summary of recordings on that day.
pub days: BTreeMap<StreamDayKey, StreamDayValue>,
pub record: bool,
/// The `next_recording_id` currently committed to the database.
pub(crate) next_recording_id: i32,
/// The recordings which have been added via `LockedDatabase::add_recording` but have yet to
/// committed to the database.
///
/// `uncommitted[i]` uses sample filename `CompositeId::new(id, next_recording_id + 1)`;
/// `next_recording_id` should be advanced when one is committed to maintain this invariant.
///
/// TODO: alter the serving path to show these just as if they were already committed.
uncommitted: VecDeque<Arc<Mutex<RecordingToInsert>>>,
/// The number of recordings in `uncommitted` which are synced and ready to commit.
synced_recordings: usize,
}
#[derive(Clone, Debug, Default)]
pub struct StreamChange {
pub sample_file_dir_id: Option<i32>,
pub rtsp_path: String,
pub record: bool,
pub flush_if_sec: i64,
}
/// Information about a camera, used by `add_camera` and `update_camera`.
#[derive(Clone, Debug)]
pub struct CameraChange {
pub short_name: String,
pub description: String,
pub host: String,
pub username: String,
pub password: String,
/// `StreamType t` is represented by `streams[t.index()]`. A default StreamChange will
/// correspond to no stream in the database, provided there are no existing recordings for that
/// stream.
pub streams: [StreamChange; 2],
}
/// Adds non-zero `delta` to the day represented by `day` in the map `m`.
/// Inserts a map entry if absent; removes the entry if it has 0 entries on exit.
fn adjust_day(day: StreamDayKey, delta: StreamDayValue,
m: &mut BTreeMap<StreamDayKey, StreamDayValue>) {
use ::std::collections::btree_map::Entry;
match m.entry(day) {
Entry::Vacant(e) => { e.insert(delta); },
Entry::Occupied(mut e) => {
let remove = {
let v = e.get_mut();
v.recordings += delta.recordings;
v.duration += delta.duration;
v.recordings == 0
};
if remove {
e.remove_entry();
}
},
}
}
/// Adjusts the day map `m` to reflect the range of the given recording.
/// Note that the specified range may span two days. It will never span more because the maximum
/// length of a recording entry is less than a day (even a 23-hour "spring forward" day).
///
/// This function swallows/logs date formatting errors because they shouldn't happen and there's
/// not much that can be done about them. (The database operation has already gone through.)
fn adjust_days(r: Range<recording::Time>, sign: i64,
m: &mut BTreeMap<StreamDayKey, StreamDayValue>) {
// Find first day key.
let mut my_tm = time::at(time::Timespec{sec: r.start.unix_seconds(), nsec: 0});
let day = match StreamDayKey::new(my_tm) {
Ok(d) => d,
Err(ref e) => {
error!("Unable to fill first day key from {:?}: {}; will ignore.", my_tm, e);
return;
}
};
// Determine the start of the next day.
// Use mytm to hold a non-normalized representation of the boundary.
my_tm.tm_isdst = -1;
my_tm.tm_hour = 0;
my_tm.tm_min = 0;
my_tm.tm_sec = 0;
my_tm.tm_mday += 1;
let boundary = my_tm.to_timespec();
let boundary_90k = boundary.sec * TIME_UNITS_PER_SEC;
// Adjust the first day.
let first_day_delta = StreamDayValue{
recordings: sign,
duration: recording::Duration(sign * (cmp::min(r.end.0, boundary_90k) - r.start.0)),
};
adjust_day(day, first_day_delta, m);
if r.end.0 <= boundary_90k {
return;
}
// Fill day with the second day. This requires a normalized representation so recalculate.
// (The C mktime(3) already normalized for us once, but .to_timespec() discarded that result.)
let my_tm = time::at(boundary);
let day = match StreamDayKey::new(my_tm) {
Ok(d) => d,
Err(ref e) => {
error!("Unable to fill second day key from {:?}: {}; will ignore.", my_tm, e);
return;
}
};
let second_day_delta = StreamDayValue{
recordings: sign,
duration: recording::Duration(sign * (r.end.0 - boundary_90k)),
};
adjust_day(day, second_day_delta, m);
}
impl Stream {
/// Adds a single recording with the given properties to the in-memory state.
fn add_recording(&mut self, r: Range<recording::Time>, sample_file_bytes: i32) {
self.range = Some(match self.range {
Some(ref e) => cmp::min(e.start, r.start) .. cmp::max(e.end, r.end),
None => r.start .. r.end,
});
self.duration += r.end - r.start;
self.sample_file_bytes += sample_file_bytes as i64;
adjust_days(r, 1, &mut self.days);
}
}
/// Initializes the recordings associated with the given camera.
fn init_recordings(conn: &mut rusqlite::Connection, stream_id: i32, camera: &Camera,
stream: &mut Stream)
-> Result<(), Error> {
info!("Loading recordings for camera {} stream {:?}", camera.short_name, stream.type_);
let mut stmt = conn.prepare(r#"
select
recording.start_time_90k,
recording.duration_90k,
recording.sample_file_bytes
from
recording
where
stream_id = :stream_id
"#)?;
let mut rows = stmt.query_named(&[(":stream_id", &stream_id)])?;
let mut i = 0;
while let Some(row) = rows.next() {
let row = row?;
let start = recording::Time(row.get_checked(0)?);
let duration = recording::Duration(row.get_checked(1)?);
let bytes = row.get_checked(2)?;
stream.add_recording(start .. start + duration, bytes);
i += 1;
}
info!("Loaded {} recordings for camera {} stream {:?}", i, camera.short_name, stream.type_);
Ok(())
}
pub struct LockedDatabase {
conn: rusqlite::Connection,
uuid: Uuid,
/// If the database is open in read-write mode, the information about the current Open row.
open: Option<Open>,
/// The monotonic time when the database was opened (whether in read-write mode or read-only
/// mode).
open_monotonic: recording::Time,
sample_file_dirs_by_id: BTreeMap<i32, SampleFileDir>,
cameras_by_id: BTreeMap<i32, Camera>,
streams_by_id: BTreeMap<i32, Stream>,
cameras_by_uuid: BTreeMap<Uuid, i32>, // values are ids.
video_sample_entries_by_id: BTreeMap<i32, Arc<VideoSampleEntry>>,
video_index_cache: RefCell<LruCache<i64, Box<[u8]>, fnv::FnvBuildHasher>>,
on_flush: Vec<Box<Fn() + Send>>,
}
/// Represents a row of the `open` database table.
#[derive(Copy, Clone, Debug)]
pub(crate) struct Open {
pub(crate) id: u32,
pub(crate) uuid: Uuid,
}
#[derive(Copy, Clone, Debug, Eq, Hash, PartialEq)]
pub struct CompositeId(pub i64);
impl CompositeId {
pub fn new(stream_id: i32, recording_id: i32) -> Self {
CompositeId((stream_id as i64) << 32 | recording_id as i64)
}
pub fn stream(self) -> i32 { (self.0 >> 32) as i32 }
pub fn recording(self) -> i32 { self.0 as i32 }
}
impl ::std::fmt::Display for CompositeId {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
write!(f, "{}/{}", self.stream(), self.recording())
}
}
/// Inserts, updates, or removes streams in the `State` object to match a set of `StreamChange`
/// structs.
struct StreamStateChanger {
sids: [Option<i32>; 2],
streams: Vec<(i32, Option<Stream>)>,
}
impl StreamStateChanger {
/// Performs the database updates (guarded by the given transaction) and returns the state
/// change to be applied on successful commit.
fn new(tx: &rusqlite::Transaction, camera_id: i32, existing: Option<&Camera>,
streams_by_id: &BTreeMap<i32, Stream>, change: &mut CameraChange)
-> Result<Self, Error> {
let mut sids = [None; 2];
let mut streams = Vec::with_capacity(2);
let existing_streams = existing.map(|e| e.streams).unwrap_or_default();
for (i, ref mut sc) in change.streams.iter_mut().enumerate() {
let mut have_data = false;
if let Some(sid) = existing_streams[i] {
let s = streams_by_id.get(&sid).unwrap();
if s.range.is_some() {
have_data = true;
if let (Some(d), false) = (s.sample_file_dir_id,
s.sample_file_dir_id == sc.sample_file_dir_id) {
bail!("can't change sample_file_dir_id {:?}->{:?} for non-empty stream {}",
d, sc.sample_file_dir_id, sid);
}
}
if !have_data && sc.rtsp_path.is_empty() && sc.sample_file_dir_id.is_none() &&
!sc.record {
// Delete stream.
let mut stmt = tx.prepare_cached(r#"
delete from stream where id = ?
"#)?;
if stmt.execute(&[&sid])? != 1 {
bail!("missing stream {}", sid);
}
streams.push((sid, None));
} else {
// Update stream.
let mut stmt = tx.prepare_cached(r#"
update stream set
rtsp_path = :rtsp_path,
record = :record,
flush_if_sec = :flush_if_sec,
sample_file_dir_id = :sample_file_dir_id
where
id = :id
"#)?;
let rows = stmt.execute_named(&[
(":rtsp_path", &sc.rtsp_path),
(":record", &sc.record),
(":flush_if_sec", &sc.flush_if_sec),
(":sample_file_dir_id", &sc.sample_file_dir_id),
(":id", &sid),
])?;
if rows != 1 {
bail!("missing stream {}", sid);
}
sids[i] = Some(sid);
let s = (*s).clone();
streams.push((sid, Some(Stream {
sample_file_dir_id: sc.sample_file_dir_id,
rtsp_path: mem::replace(&mut sc.rtsp_path, String::new()),
record: sc.record,
flush_if_sec: sc.flush_if_sec,
..s
})));
}
} else {
if sc.rtsp_path.is_empty() && sc.sample_file_dir_id.is_none() && !sc.record {
// Do nothing; there is no record and we want to keep it that way.
continue;
}
// Insert stream.
let mut stmt = tx.prepare_cached(r#"
insert into stream (camera_id, sample_file_dir_id, type, rtsp_path, record,
retain_bytes, flush_if_sec, next_recording_id)
values (:camera_id, :sample_file_dir_id, :type, :rtsp_path, :record,
0, :flush_if_sec, 1)
"#)?;
let type_ = StreamType::from_index(i).unwrap();
stmt.execute_named(&[
(":camera_id", &camera_id),
(":sample_file_dir_id", &sc.sample_file_dir_id),
(":type", &type_.as_str()),
(":rtsp_path", &sc.rtsp_path),
(":record", &sc.record),
(":flush_if_sec", &sc.flush_if_sec),
])?;
let id = tx.last_insert_rowid() as i32;
sids[i] = Some(id);
streams.push((id, Some(Stream {
id,
type_,
camera_id,
sample_file_dir_id: sc.sample_file_dir_id,
rtsp_path: mem::replace(&mut sc.rtsp_path, String::new()),
retain_bytes: 0,
flush_if_sec: sc.flush_if_sec,
range: None,
sample_file_bytes: 0,
to_delete: Vec::new(),
bytes_to_delete: 0,
bytes_to_add: 0,
duration: recording::Duration(0),
days: BTreeMap::new(),
record: sc.record,
next_recording_id: 1,
uncommitted: VecDeque::new(),
synced_recordings: 0,
})));
}
}
Ok(StreamStateChanger {
sids,
streams,
})
}
/// Applies the change to the given `streams_by_id`. The caller is expected to set
/// `Camera::streams` to the return value.
fn apply(mut self, streams_by_id: &mut BTreeMap<i32, Stream>) -> [Option<i32>; 2] {
for (id, mut stream) in self.streams.drain(..) {
use ::std::collections::btree_map::Entry;
match (streams_by_id.entry(id), stream) {
(Entry::Vacant(mut e), Some(new)) => { e.insert(new); },
(Entry::Vacant(_), None) => {},
(Entry::Occupied(mut e), Some(new)) => { e.insert(new); },
(Entry::Occupied(mut e), None) => { e.remove(); },
};
}
self.sids
}
}
/// A retention change as expected by `LockedDatabase::update_retention`.
pub struct RetentionChange {
pub stream_id: i32,
pub new_record: bool,
pub new_limit: i64,
}
impl LockedDatabase {
/// Returns an immutable view of the cameras by id.
pub fn cameras_by_id(&self) -> &BTreeMap<i32, Camera> { &self.cameras_by_id }
pub fn sample_file_dirs_by_id(&self) -> &BTreeMap<i32, SampleFileDir> {
&self.sample_file_dirs_by_id
}
/// Adds a placeholder for an uncommitted recording.
/// The caller should write samples and fill the returned `RecordingToInsert` as it goes
/// (noting that while holding the lock, it should not perform I/O or acquire the database
/// lock). Then it should sync to permanent storage and call `mark_synced`. The data will
/// be written to the database on the next `flush`.
pub(crate) fn add_recording(&mut self, stream_id: i32, r: RecordingToInsert)
-> Result<(CompositeId, Arc<Mutex<RecordingToInsert>>), Error> {
let stream = match self.streams_by_id.get_mut(&stream_id) {
None => bail!("no such stream {}", stream_id),
Some(s) => s,
};
let id = CompositeId::new(stream_id,
stream.next_recording_id + (stream.uncommitted.len() as i32));
let recording = Arc::new(Mutex::new(r));
stream.uncommitted.push_back(Arc::clone(&recording));
Ok((id, recording))
}
/// Marks the given uncomitted recording as synced and ready to flush.
/// This must be the next unsynced recording.
pub(crate) fn mark_synced(&mut self, id: CompositeId) -> Result<(), Error> {
let stream = match self.streams_by_id.get_mut(&id.stream()) {
None => bail!("no stream for recording {}", id),
Some(s) => s,
};
let next_unsynced = stream.next_recording_id + (stream.synced_recordings as i32);
if id.recording() != next_unsynced {
bail!("can't sync {} when next unsynced recording is {} (next unflushed is {})",
id, next_unsynced, stream.next_recording_id);
}
if stream.synced_recordings == stream.uncommitted.len() {
bail!("can't sync un-added recording {}", id);
}
let l = stream.uncommitted[stream.synced_recordings].lock();
stream.bytes_to_add += l.sample_file_bytes as i64;
stream.synced_recordings += 1;
Ok(())
}
pub(crate) fn delete_garbage(&mut self, dir_id: i32, ids: &mut Vec<CompositeId>)
-> Result<(), Error> {
let dir = match self.sample_file_dirs_by_id.get_mut(&dir_id) {
None => bail!("no such dir {}", dir_id),
Some(d) => d,
};
dir.to_gc.append(ids);
Ok(())
}
/// Helper for `DatabaseGuard::flush()` and `Database::drop()`.
///
/// The public API is in `DatabaseGuard::flush()`; it supplies the `Clocks` to this function.
fn flush<C: Clocks>(&mut self, clocks: &C, reason: &str) -> Result<(), Error> {
let o = match self.open.as_ref() {
None => bail!("database is read-only"),
Some(o) => o,
};
let tx = self.conn.transaction()?;
let mut new_ranges = FnvHashMap::with_capacity_and_hasher(self.streams_by_id.len(),
Default::default());
{
let mut stmt = tx.prepare_cached(UPDATE_NEXT_RECORDING_ID_SQL)?;
for (&stream_id, s) in &self.streams_by_id {
// Process additions.
for i in 0..s.synced_recordings {
let l = s.uncommitted[i].lock();
raw::insert_recording(
&tx, o, CompositeId::new(stream_id, s.next_recording_id + i as i32), &l)?;
}
if s.synced_recordings > 0 {
new_ranges.entry(stream_id).or_insert(None);
stmt.execute_named(&[
(":stream_id", &stream_id),
(":next_recording_id", &(s.next_recording_id + s.synced_recordings as i32)),
])?;
}
// Process deletions.
if let Some(l) = s.to_delete.last() {
new_ranges.entry(stream_id).or_insert(None);
let dir = match s.sample_file_dir_id {
None => bail!("stream {} has no directory!", stream_id),
Some(d) => d,
};
let start = CompositeId::new(stream_id, 0);
let end = CompositeId(l.id.0 + 1);
let n = raw::delete_recordings(&tx, dir, start .. end)? as usize;
if n != s.to_delete.len() {
bail!("Found {} rows in {} .. {}, expected {}: {:?}",
n, start, end, s.to_delete.len(), &s.to_delete);
}
}
}
}
for dir in self.sample_file_dirs_by_id.values() {
raw::mark_sample_files_deleted(&tx, &dir.to_gc)?;
}
for (&stream_id, mut r) in &mut new_ranges {
*r = raw::get_range(&tx, stream_id)?;
}
{
let mut stmt = tx.prepare_cached(
r"update open set duration_90k = ?, end_time_90k = ? where id = ?")?;
let rows = stmt.execute(&[
&(recording::Time::new(clocks.monotonic()) - self.open_monotonic).0,
&recording::Time::new(clocks.realtime()).0,
&o.id,
])?;
if rows != 1 {
bail!("unable to find current open {}", o.id);
}
}
tx.commit()?;
// Process delete_garbage.
let mut gced = 0;
for dir in self.sample_file_dirs_by_id.values_mut() {
gced += dir.to_gc.len();
for id in dir.to_gc.drain(..) {
dir.garbage.remove(&id);
}
}
let mut added = 0;
let mut deleted = 0;
for (stream_id, new_range) in new_ranges.drain() {
let s = self.streams_by_id.get_mut(&stream_id).unwrap();
let d = self.sample_file_dirs_by_id.get_mut(&s.sample_file_dir_id.unwrap()).unwrap();
// Process delete_oldest_recordings.
deleted += s.to_delete.len();
s.sample_file_bytes -= s.bytes_to_delete;
s.bytes_to_delete = 0;
for row in s.to_delete.drain(..) {
d.garbage.insert(row.id);
let d = recording::Duration(row.duration as i64);
s.duration -= d;
adjust_days(row.start .. row.start + d, -1, &mut s.days);
}
// Process add_recordings.
s.next_recording_id += s.synced_recordings as i32;
added += s.synced_recordings;
s.bytes_to_add = 0;
for _ in 0..s.synced_recordings {
let u = s.uncommitted.pop_front().unwrap();
let l = u.lock();
let end = l.start + recording::Duration(l.duration_90k as i64);
s.add_recording(l.start .. end, l.sample_file_bytes);
}
s.synced_recordings = 0;
// Fix the range.
s.range = new_range;
}
info!("Flush (why: {}): added {} recordings, deleted {}, marked {} files GCed.",
reason, added, deleted, gced);
for cb in &self.on_flush {
cb();
}
Ok(())
}
/// Sets a watcher which will receive an (empty) event on successful flush.
/// The lock will be held while this is run, so it should not do any I/O.
pub(crate) fn on_flush(&mut self, run: Box<Fn() + Send>) {
self.on_flush.push(run);
}
// TODO: find a cleaner way to do this. Seems weird for src/cmds/run.rs to clear the on flush
// handlers given that it didn't add them.
pub fn clear_on_flush(&mut self) {
self.on_flush.clear();
}
/// Opens the given sample file directories.
///
/// `ids` is implicitly de-duplicated.
///
/// When the database is in read-only mode, this simply opens all the directories after
/// locking and verifying their metadata matches the database state. In read-write mode, it
/// performs a single database transaction to update metadata for all dirs, then performs a like
/// update to the directories' on-disk metadata.
///
/// Note this violates the principle of never accessing disk while holding the database lock.
/// Currently this only happens at startup (or during configuration), so this isn't a problem
/// in practice.
pub fn open_sample_file_dirs(&mut self, ids: &[i32]) -> Result<(), Error> {
let mut in_progress = FnvHashMap::with_capacity_and_hasher(ids.len(), Default::default());
for &id in ids {
let e = in_progress.entry(id);
use ::std::collections::hash_map::Entry;
let e = match e {
Entry::Occupied(_) => continue, // suppress duplicate.
Entry::Vacant(e) => e,
};
let dir = self.sample_file_dirs_by_id
.get_mut(&id)
.ok_or_else(|| format_err!("no such dir {}", id))?;
if dir.dir.is_some() { continue }
let mut meta = dir.meta(&self.uuid);
if let Some(o) = self.open.as_ref() {
let open = meta.mut_in_progress_open();
open.id = o.id;
open.uuid.extend_from_slice(&o.uuid.as_bytes()[..]);
}
let d = dir::SampleFileDir::open(&dir.path, &meta)?;
if self.open.is_none() { // read-only mode; it's already fully opened.
dir.dir = Some(d);
} else { // read-write mode; there are more steps to do.
e.insert((meta, d));
}
}
let o = match self.open.as_ref() {
None => return Ok(()), // read-only mode; all done.
Some(o) => o,
};
let tx = self.conn.transaction()?;
{
let mut stmt = tx.prepare_cached(r#"
update sample_file_dir set last_complete_open_id = ? where id = ?
"#)?;
for &id in in_progress.keys() {
if stmt.execute(&[&o.id, &id])? != 1 {
bail!("unable to update dir {}", id);
}
}
}
tx.commit()?;
for (id, (mut meta, d)) in in_progress.drain() {
let dir = self.sample_file_dirs_by_id.get_mut(&id).unwrap();
meta.last_complete_open.clear();
mem::swap(&mut meta.last_complete_open, &mut meta.in_progress_open);
d.write_meta(&meta)?;
dir.dir = Some(d);
}
Ok(())
}
pub fn streams_by_id(&self) -> &BTreeMap<i32, Stream> { &self.streams_by_id }
/// Returns an immutable view of the video sample entries.
pub fn video_sample_entries_by_id(&self) -> &BTreeMap<i32, Arc<VideoSampleEntry>> {
&self.video_sample_entries_by_id
}
/// Gets a given camera by uuid.
pub fn get_camera(&self, uuid: Uuid) -> Option<&Camera> {
match self.cameras_by_uuid.get(&uuid) {
Some(id) => Some(self.cameras_by_id.get(id).expect("uuid->id requires id->cam")),
None => None,
}
}
/// Lists the specified recordings, passing them to a supplied function. Given that the
/// function is called with the database lock held, it should be quick.
///
/// Note that at present, the returned recordings are _not_ completely ordered by start time.
/// Uncommitted recordings are returned id order after the others.
pub fn list_recordings_by_time(
&self, stream_id: i32, desired_time: Range<recording::Time>,
f: &mut FnMut(ListRecordingsRow) -> Result<(), Error>) -> Result<(), Error> {
let s = match self.streams_by_id.get(&stream_id) {
None => bail!("no such stream {}", stream_id),
Some(s) => s,
};
raw::list_recordings_by_time(&self.conn, stream_id, desired_time.clone(), f)?;
for (i, u) in s.uncommitted.iter().enumerate() {
let row = {
let l = u.lock();
if l.video_samples > 0 {
let end = l.start + recording::Duration(l.duration_90k as i64);
if l.start > desired_time.end || end < desired_time.start {
continue; // there's no overlap with the requested range.
}
l.to_list_row(CompositeId::new(stream_id, s.next_recording_id + i as i32),
self.open.unwrap().id)
} else {
continue;
}
};
f(row)?;
}
Ok(())
}
/// Lists the specified recordings in ascending order by id.
pub fn list_recordings_by_id(
&self, stream_id: i32, desired_ids: Range<i32>,
f: &mut FnMut(ListRecordingsRow) -> Result<(), Error>) -> Result<(), Error> {
let s = match self.streams_by_id.get(&stream_id) {
None => bail!("no such stream {}", stream_id),
Some(s) => s,
};
if desired_ids.start < s.next_recording_id {
raw::list_recordings_by_id(&self.conn, stream_id, desired_ids.clone(), f)?;
}
if desired_ids.end > s.next_recording_id {
let start = cmp::max(0, desired_ids.start - s.next_recording_id) as usize;
let end = cmp::min((desired_ids.end - s.next_recording_id) as usize,
s.uncommitted.len());
for i in start .. end {
let row = {
let l = s.uncommitted[i].lock();
if l.video_samples > 0 {
l.to_list_row(CompositeId::new(stream_id, s.next_recording_id + i as i32),
self.open.unwrap().id)
} else {
continue;
}
};
f(row)?;
}
}
Ok(())
}
/// Calls `list_recordings_by_time` and aggregates consecutive recordings.
/// Rows are given to the callback in arbitrary order. Callers which care about ordering
/// should do their own sorting.
pub fn list_aggregated_recordings(
&self, stream_id: i32, desired_time: Range<recording::Time>,
forced_split: recording::Duration,
f: &mut FnMut(&ListAggregatedRecordingsRow) -> Result<(), Error>)
-> Result<(), Error> {
// Iterate, maintaining a map from a recording_id to the aggregated row for the latest
// batch of recordings from the run starting at that id. Runs can be split into multiple
// batches for a few reasons:
//
// * forced split (when exceeding a duration limit)
// * a missing id (one that was deleted out of order)
// * video_sample_entry mismatch (if the parameters changed during a RTSP session)
//
// This iteration works because in a run, the start_time+duration of recording id r
// is equal to the start_time of recording id r+1. Thus ascending times guarantees
// ascending ids within a run. (Different runs, however, can be arbitrarily interleaved if
// their timestamps overlap. Tracking all active runs prevents that interleaving from
// causing problems.) list_recordings_by_time also returns uncommitted recordings in
// ascending order by id, and after any committed recordings with lower ids.
let mut aggs: BTreeMap<i32, ListAggregatedRecordingsRow> = BTreeMap::new();
self.list_recordings_by_time(stream_id, desired_time, &mut |row| {
let recording_id = row.id.recording();
let run_start_id = recording_id - row.run_offset;
let needs_flush = if let Some(a) = aggs.get(&run_start_id) {
let new_dur = a.time.end - a.time.start +
recording::Duration(row.duration_90k as i64);
a.ids.end != recording_id || row.video_sample_entry_id != a.video_sample_entry_id ||
new_dur >= forced_split
} else {
false
};
if needs_flush {
let a = aggs.remove(&run_start_id).expect("needs_flush when agg is None");
f(&a)?;
}
let uncommitted = (row.flags & RecordingFlags::Uncommitted as i32) != 0;
let growing = (row.flags & RecordingFlags::Growing as i32) != 0;
use std::collections::btree_map::Entry;
match aggs.entry(run_start_id) {
Entry::Occupied(mut e) => {
let a = e.get_mut();
if a.time.end != row.start {
bail!("stream {} recording {} ends at {}; {} starts at {}; expected same",
stream_id, a.ids.end - 1, a.time.end, row.id, row.start);
}
if a.open_id != row.open_id {
bail!("stream {} recording {} has open id {}; {} has {}; expected same",
stream_id, a.ids.end - 1, a.open_id, row.id, row.open_id);
}
a.time.end.0 += row.duration_90k as i64;
a.ids.end = recording_id + 1;
a.video_samples += row.video_samples as i64;
a.video_sync_samples += row.video_sync_samples as i64;
a.sample_file_bytes += row.sample_file_bytes as i64;
if uncommitted {
a.first_uncommitted = a.first_uncommitted.or(Some(recording_id));
}
a.growing = growing;
},
Entry::Vacant(e) => {
e.insert(ListAggregatedRecordingsRow {
time: row.start .. recording::Time(row.start.0 + row.duration_90k as i64),
ids: recording_id .. recording_id+1,
video_samples: row.video_samples as i64,
video_sync_samples: row.video_sync_samples as i64,
sample_file_bytes: row.sample_file_bytes as i64,
video_sample_entry_id: row.video_sample_entry_id,
stream_id,
run_start_id,
open_id: row.open_id,
first_uncommitted: if uncommitted { Some(recording_id) } else { None },
growing,
});
},
};
Ok(())
})?;
for a in aggs.values() {
f(a)?;
}
Ok(())
}
/// Calls `f` with a single `recording_playback` row.
/// Note the lock is held for the duration of `f`.
/// This uses a LRU cache to reduce the number of retrievals from the database.
pub fn with_recording_playback<R>(&self, id: CompositeId,
f: &mut FnMut(&RecordingPlayback) -> Result<R, Error>)
-> Result<R, Error> {
// Check for uncommitted path.
let s = self.streams_by_id
.get(&id.stream())
.ok_or_else(|| format_err!("no stream for {}", id))?;
if s.next_recording_id <= id.recording() {
let i = id.recording() - s.next_recording_id;
if i as usize >= s.uncommitted.len() {
bail!("no such recording {}; latest committed is {}, latest is {}",
id, s.next_recording_id, s.next_recording_id + s.uncommitted.len() as i32);
}
let l = s.uncommitted[i as usize].lock();
return f(&RecordingPlayback { video_index: &l.video_index });
}
// Committed path.
let mut cache = self.video_index_cache.borrow_mut();
if let Some(video_index) = cache.get_mut(&id.0) {
trace!("cache hit for recording {}", id);
return f(&RecordingPlayback { video_index });
}
trace!("cache miss for recording {}", id);
let mut stmt = self.conn.prepare_cached(GET_RECORDING_PLAYBACK_SQL)?;
let mut rows = stmt.query_named(&[(":composite_id", &id.0)])?;
if let Some(row) = rows.next() {
let row = row?;
let video_index: VideoIndex = row.get_checked(0)?;
let result = f(&RecordingPlayback { video_index: &video_index.0[..] });
cache.insert(id.0, video_index.0);
return result;
}
Err(format_err!("no such recording {}", id))
}
/// Deletes the oldest recordings that aren't already queued for deletion.
/// `f` should return true for each row that should be deleted.
pub(crate) fn delete_oldest_recordings(
&mut self, stream_id: i32, f: &mut FnMut(&ListOldestRecordingsRow) -> bool)
-> Result<(), Error> {
let s = match self.streams_by_id.get_mut(&stream_id) {
None => bail!("no stream {}", stream_id),
Some(s) => s,
};
let end = match s.to_delete.last() {
None => 0,
Some(row) => row.id.recording() + 1,
};
raw::list_oldest_recordings(&self.conn, CompositeId::new(stream_id, end), &mut |r| {
if f(&r) {
s.to_delete.push(r);
s.bytes_to_delete += r.sample_file_bytes as i64;
return true;
}
false
})
}
/// Initializes the video_sample_entries. To be called during construction.
fn init_video_sample_entries(&mut self) -> Result<(), Error> {
info!("Loading video sample entries");
let mut stmt = self.conn.prepare(r#"
select
id,
sha1,
width,
height,
rfc6381_codec,
data
from
video_sample_entry
"#)?;
let mut rows = stmt.query(&[])?;
while let Some(row) = rows.next() {
let row = row?;
let id = row.get_checked(0)?;
let mut sha1 = [0u8; 20];
let sha1_vec: Vec<u8> = row.get_checked(1)?;
if sha1_vec.len() != 20 {
bail!("video sample entry id {} has sha1 {} of wrong length", id, sha1_vec.len());
}
sha1.copy_from_slice(&sha1_vec);
let data: Vec<u8> = row.get_checked(5)?;
self.video_sample_entries_by_id.insert(id, Arc::new(VideoSampleEntry {
id: id as i32,
width: row.get_checked::<_, i32>(2)? as u16,
height: row.get_checked::<_, i32>(3)? as u16,
sha1,
data,
rfc6381_codec: row.get_checked(4)?,
}));
}
info!("Loaded {} video sample entries",
self.video_sample_entries_by_id.len());
Ok(())
}
/// Initializes the sample file dirs.
/// To be called during construction.
fn init_sample_file_dirs(&mut self) -> Result<(), Error> {
info!("Loading sample file dirs");
let mut stmt = self.conn.prepare(r#"
select
d.id,
d.path,
d.uuid,
d.last_complete_open_id,
o.uuid
from
sample_file_dir d left join open o on (d.last_complete_open_id = o.id);
"#)?;
let mut rows = stmt.query(&[])?;
while let Some(row) = rows.next() {
let row = row?;
let id = row.get_checked(0)?;
let dir_uuid: FromSqlUuid = row.get_checked(2)?;
let open_id: Option<u32> = row.get_checked(3)?;
let open_uuid: Option<FromSqlUuid> = row.get_checked(4)?;
let last_complete_open = match (open_id, open_uuid) {
(Some(id), Some(uuid)) => Some(Open { id, uuid: uuid.0, }),
(None, None) => None,
_ => bail!("open table missing id {}", id),
};
self.sample_file_dirs_by_id.insert(id, SampleFileDir {
id,
uuid: dir_uuid.0,
path: row.get_checked(1)?,
dir: None,
last_complete_open,
to_gc: Vec::new(),
garbage: raw::list_garbage(&self.conn, id)?,
});
}
info!("Loaded {} sample file dirs", self.sample_file_dirs_by_id.len());
Ok(())
}
/// Initializes the cameras, but not their matching recordings.
/// To be called during construction.
fn init_cameras(&mut self) -> Result<(), Error> {
info!("Loading cameras");
let mut stmt = self.conn.prepare(r#"
select
id,
uuid,
short_name,
description,
host,
username,
password
from
camera;
"#)?;
let mut rows = stmt.query(&[])?;
while let Some(row) = rows.next() {
let row = row?;
let id = row.get_checked(0)?;
let uuid: FromSqlUuid = row.get_checked(1)?;
self.cameras_by_id.insert(id, Camera {
id: id,
uuid: uuid.0,
short_name: row.get_checked(2)?,
description: row.get_checked(3)?,
host: row.get_checked(4)?,
username: row.get_checked(5)?,
password: row.get_checked(6)?,
streams: Default::default(),
});
self.cameras_by_uuid.insert(uuid.0, id);
}
info!("Loaded {} cameras", self.cameras_by_id.len());
Ok(())
}
/// Initializes the streams, but not their matching recordings.
/// To be called during construction.
fn init_streams(&mut self) -> Result<(), Error> {
info!("Loading streams");
let mut stmt = self.conn.prepare(r#"
select
id,
type,
camera_id,
sample_file_dir_id,
rtsp_path,
retain_bytes,
flush_if_sec,
next_recording_id,
record
from
stream;
"#)?;
let mut rows = stmt.query(&[])?;
while let Some(row) = rows.next() {
let row = row?;
let id = row.get_checked(0)?;
let type_: String = row.get_checked(1)?;
let type_ = StreamType::parse(&type_).ok_or_else(
|| format_err!("no such stream type {}", type_))?;
let camera_id = row.get_checked(2)?;
let c = self
.cameras_by_id
.get_mut(&camera_id)
.ok_or_else(|| format_err!("missing camera {} for stream {}",
camera_id, id))?;
let flush_if_sec = row.get_checked(6)?;
self.streams_by_id.insert(id, Stream {
id,
type_,
camera_id,
sample_file_dir_id: row.get_checked(3)?,
rtsp_path: row.get_checked(4)?,
retain_bytes: row.get_checked(5)?,
flush_if_sec,
range: None,
sample_file_bytes: 0,
to_delete: Vec::new(),
bytes_to_delete: 0,
bytes_to_add: 0,
duration: recording::Duration(0),
days: BTreeMap::new(),
next_recording_id: row.get_checked(7)?,
record: row.get_checked(8)?,
uncommitted: VecDeque::new(),
synced_recordings: 0,
});
c.streams[type_.index()] = Some(id);
}
info!("Loaded {} streams", self.streams_by_id.len());
Ok(())
}
/// Inserts the specified video sample entry if absent.
/// On success, returns the id of a new or existing row.
pub fn insert_video_sample_entry(&mut self, width: u16, height: u16, data: Vec<u8>,
rfc6381_codec: String) -> Result<i32, Error> {
let sha1 = hash::hash(hash::MessageDigest::sha1(), &data)?;
let mut sha1_bytes = [0u8; 20];
sha1_bytes.copy_from_slice(&sha1);
// Check if it already exists.
// There shouldn't be too many entries, so it's fine to enumerate everything.
for (&id, v) in &self.video_sample_entries_by_id {
if v.sha1 == sha1_bytes {
// The width and height should match given that they're also specified within data
// and thus included in the just-compared hash.
if v.width != width || v.height != height {
bail!("database entry for {:?} is {}x{}, not {}x{}",
&sha1[..], v.width, v.height, width, height);
}
return Ok(id);
}
}
let mut stmt = self.conn.prepare_cached(INSERT_VIDEO_SAMPLE_ENTRY_SQL)?;
stmt.execute_named(&[
(":sha1", &&sha1_bytes[..]),
(":width", &(width as i64)),
(":height", &(height as i64)),
(":rfc6381_codec", &rfc6381_codec),
(":data", &data),
])?;
let id = self.conn.last_insert_rowid() as i32;
self.video_sample_entries_by_id.insert(id, Arc::new(VideoSampleEntry {
id,
width,
height,
sha1: sha1_bytes,
data,
rfc6381_codec,
}));
Ok(id)
}
pub fn add_sample_file_dir(&mut self, path: String) -> Result<i32, Error> {
let mut meta = schema::DirMeta::default();
let uuid = Uuid::new_v4();
let uuid_bytes = &uuid.as_bytes()[..];
let o = self.open
.as_ref()
.ok_or_else(|| format_err!("database is read-only"))?;
// Populate meta.
{
meta.db_uuid.extend_from_slice(&self.uuid.as_bytes()[..]);
meta.dir_uuid.extend_from_slice(uuid_bytes);
let open = meta.mut_in_progress_open();
open.id = o.id;
open.uuid.extend_from_slice(&o.uuid.as_bytes()[..]);
}
let dir = dir::SampleFileDir::create(&path, &meta)?;
self.conn.execute(r#"
insert into sample_file_dir (path, uuid, last_complete_open_id)
values (?, ?, ?)
"#, &[&path, &uuid_bytes, &o.id])?;
let id = self.conn.last_insert_rowid() as i32;
use ::std::collections::btree_map::Entry;
let e = self.sample_file_dirs_by_id.entry(id);
let d = match e {
Entry::Vacant(e) => e.insert(SampleFileDir {
id,
path,
uuid,
dir: Some(dir),
last_complete_open: None,
to_gc: Vec::new(),
garbage: FnvHashSet::default(),
}),
Entry::Occupied(_) => Err(format_err!("duplicate sample file dir id {}", id))?,
};
d.last_complete_open = Some(*o);
mem::swap(&mut meta.last_complete_open, &mut meta.in_progress_open);
d.dir.as_ref().unwrap().write_meta(&meta)?;
Ok(id)
}
pub fn delete_sample_file_dir(&mut self, dir_id: i32) -> Result<(), Error> {
for (&id, s) in self.streams_by_id.iter() {
if s.sample_file_dir_id == Some(dir_id) {
bail!("can't delete dir referenced by stream {}", id);
}
}
let mut d = match self.sample_file_dirs_by_id.entry(dir_id) {
::std::collections::btree_map::Entry::Occupied(e) => e,
_ => bail!("no such dir {} to remove", dir_id),
};
if !d.get().garbage.is_empty() {
bail!("must collect garbage before deleting directory {}", d.get().path);
}
let dir = match d.get_mut().dir.take() {
None => dir::SampleFileDir::open(&d.get().path, &d.get().meta(&self.uuid))?,
Some(arc) => match Arc::strong_count(&arc) {
1 => {
d.get_mut().dir = Some(arc); // put it back.
bail!("can't delete in-use directory {}", dir_id);
},
_ => arc,
},
};
if !dir::SampleFileDir::is_empty(&d.get().path)? {
bail!("Can't delete sample file directory {} which still has files", &d.get().path);
}
let mut meta = d.get().meta(&self.uuid);
meta.in_progress_open = mem::replace(&mut meta.last_complete_open,
::protobuf::singular::SingularPtrField::none());
dir.write_meta(&meta)?;
if self.conn.execute("delete from sample_file_dir where id = ?", &[&dir_id])? != 1 {
bail!("missing database row for dir {}", dir_id);
}
d.remove_entry();
Ok(())
}
/// Adds a camera.
pub fn add_camera(&mut self, mut camera: CameraChange) -> Result<i32, Error> {
let uuid = Uuid::new_v4();
let uuid_bytes = &uuid.as_bytes()[..];
let tx = self.conn.transaction()?;
let streams;
let camera_id;
{
let mut stmt = tx.prepare_cached(r#"
insert into camera (uuid, short_name, description, host, username, password)
values (:uuid, :short_name, :description, :host, :username, :password)
"#)?;
stmt.execute_named(&[
(":uuid", &uuid_bytes),
(":short_name", &camera.short_name),
(":description", &camera.description),
(":host", &camera.host),
(":username", &camera.username),
(":password", &camera.password),
])?;
camera_id = tx.last_insert_rowid() as i32;
streams = StreamStateChanger::new(&tx, camera_id, None, &self.streams_by_id,
&mut camera)?;
}
tx.commit()?;
let streams = streams.apply(&mut self.streams_by_id);
self.cameras_by_id.insert(camera_id, Camera {
id: camera_id,
uuid,
short_name: camera.short_name,
description: camera.description,
host: camera.host,
username: camera.username,
password: camera.password,
streams,
});
self.cameras_by_uuid.insert(uuid, camera_id);
Ok(camera_id)
}
/// Updates a camera.
pub fn update_camera(&mut self, camera_id: i32, mut camera: CameraChange) -> Result<(), Error> {
let tx = self.conn.transaction()?;
let streams;
let c = self
.cameras_by_id
.get_mut(&camera_id)
.ok_or_else(|| format_err!("no such camera {}", camera_id))?;
{
streams = StreamStateChanger::new(&tx, camera_id, Some(c), &self.streams_by_id,
&mut camera)?;
let mut stmt = tx.prepare_cached(r#"
update camera set
short_name = :short_name,
description = :description,
host = :host,
username = :username,
password = :password
where
id = :id
"#)?;
let rows = stmt.execute_named(&[
(":id", &camera_id),
(":short_name", &camera.short_name),
(":description", &camera.description),
(":host", &camera.host),
(":username", &camera.username),
(":password", &camera.password),
])?;
if rows != 1 {
bail!("Camera {} missing from database", camera_id);
}
}
tx.commit()?;
c.short_name = camera.short_name;
c.description = camera.description;
c.host = camera.host;
c.username = camera.username;
c.password = camera.password;
c.streams = streams.apply(&mut self.streams_by_id);
Ok(())
}
/// Deletes a camera and its streams. The camera must have no recordings.
pub fn delete_camera(&mut self, id: i32) -> Result<(), Error> {
let uuid = self.cameras_by_id.get(&id)
.map(|c| c.uuid)
.ok_or_else(|| format_err!("No such camera {} to remove", id))?;
let mut streams_to_delete = Vec::new();
let tx = self.conn.transaction()?;
{
let mut stream_stmt = tx.prepare_cached(r"delete from stream where id = :id")?;
for (stream_id, stream) in &self.streams_by_id {
if stream.camera_id != id { continue };
if stream.range.is_some() {
bail!("Can't remove camera {}; has recordings.", id);
}
let rows = stream_stmt.execute_named(&[(":id", stream_id)])?;
if rows != 1 {
bail!("Stream {} missing from database", id);
}
streams_to_delete.push(*stream_id);
}
let mut cam_stmt = tx.prepare_cached(r"delete from camera where id = :id")?;
let rows = cam_stmt.execute_named(&[(":id", &id)])?;
if rows != 1 {
bail!("Camera {} missing from database", id);
}
}
tx.commit()?;
for id in streams_to_delete {
self.streams_by_id.remove(&id);
}
self.cameras_by_id.remove(&id);
self.cameras_by_uuid.remove(&uuid);
return Ok(())
}
pub fn update_retention(&mut self, changes: &[RetentionChange]) -> Result<(), Error> {
let tx = self.conn.transaction()?;
{
let mut stmt = tx.prepare_cached(r#"
update stream
set
record = :record,
retain_bytes = :retain
where
id = :id
"#)?;
for c in changes {
if c.new_limit < 0 {
bail!("can't set limit for stream {} to {}; must be >= 0",
c.stream_id, c.new_limit);
}
let rows = stmt.execute_named(&[
(":record", &c.new_record),
(":retain", &c.new_limit),
(":id", &c.stream_id),
])?;
if rows != 1 {
bail!("no such stream {}", c.stream_id);
}
}
}
tx.commit()?;
for c in changes {
let s = self.streams_by_id.get_mut(&c.stream_id).expect("stream in db but not state");
s.record = c.new_record;
s.retain_bytes = c.new_limit;
}
Ok(())
}
}
/// Initializes a database.
/// Note this doesn't set journal options, so that it can be used on in-memory databases for
/// test code.
pub fn init(conn: &mut rusqlite::Connection) -> Result<(), Error> {
let tx = conn.transaction()?;
tx.execute_batch(include_str!("schema.sql"))?;
{
let uuid = ::uuid::Uuid::new_v4();
let uuid_bytes = &uuid.as_bytes()[..];
tx.execute("insert into meta (uuid) values (?)", &[&uuid_bytes])?;
}
tx.commit()?;
Ok(())
}
/// Gets the schema version from the given database connection.
/// A fully initialized database will return `Ok(Some(version))` where `version` is an integer that
/// can be compared to `EXPECTED_VERSION`. An empty database will return `Ok(None)`. A partially
/// initialized database (in particular, one without a version row) will return some error.
pub fn get_schema_version(conn: &rusqlite::Connection) -> Result<Option<i32>, Error> {
let ver_tables: i32 = conn.query_row_and_then(
"select count(*) from sqlite_master where name = 'version'",
&[], |row| row.get_checked(0))?;
if ver_tables == 0 {
return Ok(None);
}
Ok(Some(conn.query_row_and_then("select max(id) from version", &[], |row| row.get_checked(0))?))
}
/// The recording database. Abstracts away SQLite queries. Also maintains in-memory state
/// (loaded on startup, and updated on successful commit) to avoid expensive scans over the
/// recording table on common queries.
pub struct Database<C: Clocks + Clone = clock::RealClocks> {
/// This is wrapped in an `Option` to allow the `Drop` implementation and `close` to coexist.
db: Option<Mutex<LockedDatabase>>,
/// This is kept separately from the `LockedDatabase` to allow the `lock()` operation itself to
/// access it. It doesn't need a `Mutex` anyway; it's `Sync`, and all operations work on
/// `&self`.
clocks: C,
}
impl<C: Clocks + Clone> Drop for Database<C> {
fn drop(&mut self) {
if ::std::thread::panicking() {
return; // don't flush while panicking.
}
if let Some(m) = self.db.take() {
if let Err(e) = m.into_inner().flush(&self.clocks, "drop") {
error!("Final database flush failed: {}", e);
}
}
}
}
// Helpers for Database::lock(). Closures don't implement Fn.
fn acquisition() -> &'static str { "database lock acquisition" }
fn operation() -> &'static str { "database operation" }
impl<C: Clocks + Clone> Database<C> {
/// Creates the database from a caller-supplied SQLite connection.
pub fn new(clocks: C, conn: rusqlite::Connection,
read_write: bool) -> Result<Database<C>, Error> {
conn.execute("pragma foreign_keys = on", &[])?;
{
let ver = get_schema_version(&conn)?.ok_or_else(|| format_err!(
"no such table: version. \
\
If you are starting from an \
empty database, see README.md to complete the \
installation. If you are starting from a database \
that predates schema versioning, see guide/schema.md."))?;
if ver < EXPECTED_VERSION {
bail!("Database schema version {} is too old (expected {}); \
see upgrade instructions in guide/upgrade.md.",
ver, EXPECTED_VERSION);
} else if ver > EXPECTED_VERSION {
bail!("Database schema version {} is too new (expected {}); \
must use a newer binary to match.", ver,
EXPECTED_VERSION);
}
}
// Note: the meta check comes after the version check to improve the error message when
// trying to open a version 0 or version 1 database (which lacked the meta table).
let uuid = raw::get_db_uuid(&conn)?;
let open_monotonic = recording::Time::new(clocks.monotonic());
let open = if read_write {
let real = recording::Time::new(clocks.realtime());
let mut stmt = conn.prepare(" insert into open (uuid, start_time_90k) values (?, ?)")?;
let uuid = Uuid::new_v4();
let uuid_bytes = &uuid.as_bytes()[..];
stmt.execute(&[&uuid_bytes, &real.0])?;
Some(Open {
id: conn.last_insert_rowid() as u32,
uuid,
})
} else { None };
let db = Database {
db: Some(Mutex::new(LockedDatabase {
conn,
uuid,
open,
open_monotonic,
sample_file_dirs_by_id: BTreeMap::new(),
cameras_by_id: BTreeMap::new(),
cameras_by_uuid: BTreeMap::new(),
streams_by_id: BTreeMap::new(),
video_sample_entries_by_id: BTreeMap::new(),
video_index_cache: RefCell::new(LruCache::with_hasher(1024, Default::default())),
on_flush: Vec::new(),
})),
clocks,
};
{
let l = &mut *db.lock();
l.init_video_sample_entries()?;
l.init_sample_file_dirs()?;
l.init_cameras()?;
l.init_streams()?;
for (&stream_id, ref mut stream) in &mut l.streams_by_id {
// TODO: we could use one thread per stream if we had multiple db conns.
let camera = l.cameras_by_id.get(&stream.camera_id).unwrap();
init_recordings(&mut l.conn, stream_id, camera, stream)?;
}
}
Ok(db)
}
#[inline(always)]
pub fn clocks(&self) -> C { self.clocks.clone() }
/// Locks the database; the returned reference is the only way to perform (read or write)
/// operations.
pub fn lock(&self) -> DatabaseGuard<C> {
let timer = clock::TimerGuard::new(&self.clocks, acquisition);
let db = self.db.as_ref().unwrap().lock();
drop(timer);
let _timer = clock::TimerGuard::<C, &'static str, fn() -> &'static str>::new(
&self.clocks, operation);
DatabaseGuard {
clocks: &self.clocks,
db,
_timer,
}
}
/// For testing: closes the database (without flushing) and returns the connection.
/// This allows verification that a newly opened database is in an acceptable state.
#[cfg(test)]
fn close(mut self) -> rusqlite::Connection {
self.db.take().unwrap().into_inner().conn
}
}
pub struct DatabaseGuard<'db, C: Clocks> {
clocks: &'db C,
db: MutexGuard<'db, LockedDatabase>,
_timer: clock::TimerGuard<'db, C, &'static str, fn() -> &'static str>,
}
impl<'db, C: Clocks + Clone> DatabaseGuard<'db, C> {
/// Tries to flush unwritten changes from the stream directories.
///
/// * commits any recordings added with `add_recording` that have since been marked as
/// synced.
/// * moves old recordings to the garbage table as requested by `delete_oldest_recordings`.
/// * removes entries from the garbage table as requested by `mark_sample_files_deleted`.
///
/// On success, for each affected sample file directory with a flush watcher set, sends a
/// `Flush` event.
pub(crate) fn flush(&mut self, reason: &str) -> Result<(), Error> {
self.db.flush(self.clocks, reason)
}
}
impl<'db, C: Clocks + Clone> ::std::ops::Deref for DatabaseGuard<'db, C> {
type Target = LockedDatabase;
fn deref(&self) -> &LockedDatabase { &*self.db }
}
impl<'db, C: Clocks + Clone> ::std::ops::DerefMut for DatabaseGuard<'db, C> {
fn deref_mut(&mut self) -> &mut LockedDatabase { &mut *self.db }
}
#[cfg(test)]
mod tests {
extern crate tempdir;
use base::clock;
use recording::{self, TIME_UNITS_PER_SEC};
use rusqlite::Connection;
use std::collections::BTreeMap;
use testutil;
use super::*;
use super::adjust_days; // non-public.
use uuid::Uuid;
fn setup_conn() -> Connection {
let mut conn = Connection::open_in_memory().unwrap();
super::init(&mut conn).unwrap();
conn
}
fn assert_no_recordings(db: &Database, uuid: Uuid) {
let mut rows = 0;
let mut camera_id = -1;
{
let db = db.lock();
for row in db.cameras_by_id().values() {
rows += 1;
camera_id = row.id;
assert_eq!(uuid, row.uuid);
assert_eq!("test-camera", row.host);
assert_eq!("foo", row.username);
assert_eq!("bar", row.password);
//assert_eq!("/main", row.main_rtsp_path);
//assert_eq!("/sub", row.sub_rtsp_path);
//assert_eq!(42, row.retain_bytes);
//assert_eq!(None, row.range);
//assert_eq!(recording::Duration(0), row.duration);
//assert_eq!(0, row.sample_file_bytes);
}
}
assert_eq!(1, rows);
let stream_id = camera_id; // TODO
rows = 0;
{
let db = db.lock();
let all_time = recording::Time(i64::min_value()) .. recording::Time(i64::max_value());
db.list_recordings_by_time(stream_id, all_time, &mut |_row| {
rows += 1;
Ok(())
}).unwrap();
}
assert_eq!(0, rows);
}
fn assert_single_recording(db: &Database, stream_id: i32, r: &RecordingToInsert) {
{
let db = db.lock();
let stream = db.streams_by_id().get(&stream_id).unwrap();
let dur = recording::Duration(r.duration_90k as i64);
assert_eq!(Some(r.start .. r.start + dur), stream.range);
assert_eq!(r.sample_file_bytes as i64, stream.sample_file_bytes);
assert_eq!(dur, stream.duration);
db.cameras_by_id().get(&stream.camera_id).unwrap();
}
// TODO(slamb): test that the days logic works correctly.
let mut rows = 0;
let mut recording_id = None;
{
let db = db.lock();
let all_time = recording::Time(i64::min_value()) .. recording::Time(i64::max_value());
db.list_recordings_by_time(stream_id, all_time, &mut |row| {
rows += 1;
recording_id = Some(row.id);
assert_eq!(r.start, row.start);
assert_eq!(r.duration_90k, row.duration_90k);
assert_eq!(r.video_samples, row.video_samples);
assert_eq!(r.video_sync_samples, row.video_sync_samples);
assert_eq!(r.sample_file_bytes, row.sample_file_bytes);
let vse = db.video_sample_entries_by_id().get(&row.video_sample_entry_id).unwrap();
assert_eq!(vse.rfc6381_codec, "avc1.4d0029");
Ok(())
}).unwrap();
}
assert_eq!(1, rows);
rows = 0;
raw::list_oldest_recordings(&db.lock().conn, CompositeId::new(stream_id, 0), &mut |row| {
rows += 1;
assert_eq!(recording_id, Some(row.id));
assert_eq!(r.start, row.start);
assert_eq!(r.duration_90k, row.duration);
assert_eq!(r.sample_file_bytes, row.sample_file_bytes);
true
}).unwrap();
assert_eq!(1, rows);
// TODO: list_aggregated_recordings.
// TODO: with_recording_playback.
}
#[test]
fn test_adjust_days() {
testutil::init();
let mut m = BTreeMap::new();
// Create a day.
let test_time = recording::Time(130647162600000i64); // 2015-12-31 23:59:00 (Pacific).
let one_min = recording::Duration(60 * TIME_UNITS_PER_SEC);
let two_min = recording::Duration(2 * 60 * TIME_UNITS_PER_SEC);
let three_min = recording::Duration(3 * 60 * TIME_UNITS_PER_SEC);
let four_min = recording::Duration(4 * 60 * TIME_UNITS_PER_SEC);
let test_day1 = &StreamDayKey(*b"2015-12-31");
let test_day2 = &StreamDayKey(*b"2016-01-01");
adjust_days(test_time .. test_time + one_min, 1, &mut m);
assert_eq!(1, m.len());
assert_eq!(Some(&StreamDayValue{recordings: 1, duration: one_min}), m.get(test_day1));
// Add to a day.
adjust_days(test_time .. test_time + one_min, 1, &mut m);
assert_eq!(1, m.len());
assert_eq!(Some(&StreamDayValue{recordings: 2, duration: two_min}), m.get(test_day1));
// Subtract from a day.
adjust_days(test_time .. test_time + one_min, -1, &mut m);
assert_eq!(1, m.len());
assert_eq!(Some(&StreamDayValue{recordings: 1, duration: one_min}), m.get(test_day1));
// Remove a day.
adjust_days(test_time .. test_time + one_min, -1, &mut m);
assert_eq!(0, m.len());
// Create two days.
adjust_days(test_time .. test_time + three_min, 1, &mut m);
assert_eq!(2, m.len());
assert_eq!(Some(&StreamDayValue{recordings: 1, duration: one_min}), m.get(test_day1));
assert_eq!(Some(&StreamDayValue{recordings: 1, duration: two_min}), m.get(test_day2));
// Add to two days.
adjust_days(test_time .. test_time + three_min, 1, &mut m);
assert_eq!(2, m.len());
assert_eq!(Some(&StreamDayValue{recordings: 2, duration: two_min}), m.get(test_day1));
assert_eq!(Some(&StreamDayValue{recordings: 2, duration: four_min}), m.get(test_day2));
// Subtract from two days.
adjust_days(test_time .. test_time + three_min, -1, &mut m);
assert_eq!(2, m.len());
assert_eq!(Some(&StreamDayValue{recordings: 1, duration: one_min}), m.get(test_day1));
assert_eq!(Some(&StreamDayValue{recordings: 1, duration: two_min}), m.get(test_day2));
// Remove two days.
adjust_days(test_time .. test_time + three_min, -1, &mut m);
assert_eq!(0, m.len());
}
#[test]
fn test_day_bounds() {
testutil::init();
assert_eq!(StreamDayKey(*b"2017-10-10").bounds(), // normal day (24 hrs)
recording::Time(135685692000000) .. recording::Time(135693468000000));
assert_eq!(StreamDayKey(*b"2017-03-12").bounds(), // spring forward (23 hrs)
recording::Time(134037504000000) .. recording::Time(134044956000000));
assert_eq!(StreamDayKey(*b"2017-11-05").bounds(), // fall back (25 hrs)
recording::Time(135887868000000) .. recording::Time(135895968000000));
}
#[test]
fn test_no_meta_or_version() {
testutil::init();
let e = Database::new(clock::RealClocks {}, Connection::open_in_memory().unwrap(),
false).err().unwrap();
assert!(e.to_string().starts_with("no such table"), "{}", e);
}
#[test]
fn test_version_too_old() {
testutil::init();
let c = setup_conn();
c.execute_batch("delete from version; insert into version values (2, 0, '');").unwrap();
let e = Database::new(clock::RealClocks {}, c, false).err().unwrap();
assert!(e.to_string().starts_with(
"Database schema version 2 is too old (expected 3)"), "got: {:?}", e);
}
#[test]
fn test_version_too_new() {
testutil::init();
let c = setup_conn();
c.execute_batch("delete from version; insert into version values (4, 0, '');").unwrap();
let e = Database::new(clock::RealClocks {}, c, false).err().unwrap();
assert!(e.to_string().starts_with(
"Database schema version 4 is too new (expected 3)"), "got: {:?}", e);
}
/// Basic test of running some queries on a fresh database.
#[test]
fn test_fresh_db() {
testutil::init();
let conn = setup_conn();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
let db = db.lock();
assert_eq!(0, db.cameras_by_id().values().count());
}
/// Basic test of the full lifecycle of recording. Does not exercise error cases.
#[test]
fn test_full_lifecycle() {
testutil::init();
let conn = setup_conn();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
let tmpdir = tempdir::TempDir::new("moonfire-nvr-test").unwrap();
let path = tmpdir.path().to_str().unwrap().to_owned();
let sample_file_dir_id = { db.lock() }.add_sample_file_dir(path).unwrap();
let mut c = CameraChange {
short_name: "testcam".to_owned(),
description: "".to_owned(),
host: "test-camera".to_owned(),
username: "foo".to_owned(),
password: "bar".to_owned(),
streams: [
StreamChange {
sample_file_dir_id: Some(sample_file_dir_id),
rtsp_path: "/main".to_owned(),
record: false,
flush_if_sec: 1,
},
StreamChange {
sample_file_dir_id: Some(sample_file_dir_id),
rtsp_path: "/sub".to_owned(),
record: true,
flush_if_sec: 1,
},
],
};
let camera_id = db.lock().add_camera(c.clone()).unwrap();
let (main_stream_id, sub_stream_id);
{
let mut l = db.lock();
{
let c = l.cameras_by_id().get(&camera_id).unwrap();
main_stream_id = c.streams[0].unwrap();
sub_stream_id = c.streams[1].unwrap();
}
l.update_retention(&[super::RetentionChange {
stream_id: main_stream_id,
new_record: true,
new_limit: 42,
}]).unwrap();
{
let main = l.streams_by_id().get(&main_stream_id).unwrap();
assert!(main.record);
assert_eq!(main.retain_bytes, 42);
assert_eq!(main.flush_if_sec, 1);
}
assert_eq!(l.streams_by_id().get(&sub_stream_id).unwrap().flush_if_sec, 1);
c.streams[1].flush_if_sec = 2;
l.update_camera(camera_id, c).unwrap();
assert_eq!(l.streams_by_id().get(&sub_stream_id).unwrap().flush_if_sec, 2);
}
let camera_uuid = { db.lock().cameras_by_id().get(&camera_id).unwrap().uuid };
assert_no_recordings(&db, camera_uuid);
// Closing and reopening the database should present the same contents.
let conn = db.close();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
assert_eq!(db.lock().streams_by_id().get(&sub_stream_id).unwrap().flush_if_sec, 2);
assert_no_recordings(&db, camera_uuid);
// TODO: assert_eq!(db.lock().list_garbage(sample_file_dir_id).unwrap(), &[]);
let vse_id = db.lock().insert_video_sample_entry(
1920, 1080, include_bytes!("testdata/avc1").to_vec(),
"avc1.4d0029".to_owned()).unwrap();
assert!(vse_id > 0, "vse_id = {}", vse_id);
// Inserting a recording should succeed and advance the next recording id.
let start = recording::Time(1430006400 * TIME_UNITS_PER_SEC);
let recording = RecordingToInsert {
sample_file_bytes: 42,
run_offset: 0,
flags: 0,
start,
duration_90k: TIME_UNITS_PER_SEC as i32,
local_time_delta: recording::Duration(0),
video_samples: 1,
video_sync_samples: 1,
video_sample_entry_id: vse_id,
video_index: [0u8; 100].to_vec(),
sample_file_sha1: [0u8; 20],
};
let id = {
let mut db = db.lock();
let (id, _) = db.add_recording(main_stream_id, recording.clone()).unwrap();
db.mark_synced(id).unwrap();
db.flush("add test").unwrap();
id
};
assert_eq!(db.lock().streams_by_id().get(&main_stream_id).unwrap().next_recording_id, 2);
// Queries should return the correct result (with caches update on insert).
assert_single_recording(&db, main_stream_id, &recording);
// Queries on a fresh database should return the correct result (with caches populated from
// existing database contents rather than built on insert).
let conn = db.close();
let db = Database::new(clock::RealClocks {}, conn, true).unwrap();
assert_single_recording(&db, main_stream_id, &recording);
// Deleting a recording should succeed, update the min/max times, and mark it as garbage.
{
let mut db = db.lock();
let mut n = 0;
db.delete_oldest_recordings(main_stream_id, &mut |_| { n += 1; true }).unwrap();
assert_eq!(n, 1);
{
let s = db.streams_by_id().get(&main_stream_id).unwrap();
assert_eq!(s.sample_file_bytes, 42);
assert_eq!(s.bytes_to_delete, 42);
}
n = 0;
// A second run
db.delete_oldest_recordings(main_stream_id, &mut |_| { n += 1; true }).unwrap();
assert_eq!(n, 0);
assert_eq!(db.streams_by_id().get(&main_stream_id).unwrap().bytes_to_delete, 42);
db.flush("delete test").unwrap();
let s = db.streams_by_id().get(&main_stream_id).unwrap();
assert_eq!(s.sample_file_bytes, 0);
assert_eq!(s.bytes_to_delete, 0);
}
assert_no_recordings(&db, camera_uuid);
let g: Vec<_> = db.lock()
.sample_file_dirs_by_id()
.get(&sample_file_dir_id)
.unwrap()
.garbage
.iter()
.map(|&id| id)
.collect();
assert_eq!(&g, &[id]);
}
}
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