proxmox-rrd: move RRDMap into extra file
This commit is contained in:
Dietmar Maurer
parent
f84304235b
commit
45700e2ecf
@ -1,6 +1,5 @@
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use std::fs::File;
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use std::path::{Path, PathBuf};
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use std::collections::HashMap;
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use std::sync::{Arc, RwLock};
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use std::io::{BufRead, BufReader};
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use std::time::SystemTime;
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@ -15,6 +14,9 @@ use crate::rrd::{DST, CF, RRD, RRA};
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mod journal;
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use journal::*;
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mod rrd_map;
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use rrd_map::*;
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/// RRD cache - keep RRD data in RAM, but write updates to disk
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///
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/// This cache is designed to run as single instance (no concurrent
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@ -32,95 +34,6 @@ pub(crate) struct CacheConfig {
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dir_options: CreateOptions,
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}
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struct RRDMap {
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config: Arc<CacheConfig>,
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map: HashMap<String, RRD>,
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load_rrd_cb: fn(path: &Path, rel_path: &str, dst: DST) -> RRD,
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}
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impl RRDMap {
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fn new(
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config: Arc<CacheConfig>,
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load_rrd_cb: fn(path: &Path, rel_path: &str, dst: DST) -> RRD,
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) -> Self {
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Self {
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config,
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map: HashMap::new(),
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load_rrd_cb,
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}
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}
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fn update(
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&mut self,
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rel_path: &str,
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time: f64,
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value: f64,
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dst: DST,
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new_only: bool,
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) -> Result<(), Error> {
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if let Some(rrd) = self.map.get_mut(rel_path) {
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if !new_only || time > rrd.last_update() {
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rrd.update(time, value);
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}
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} else {
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let mut path = self.config.basedir.clone();
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path.push(rel_path);
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create_path(
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path.parent().unwrap(),
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Some(self.config.dir_options.clone()),
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Some(self.config.dir_options.clone()),
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)?;
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let mut rrd = (self.load_rrd_cb)(&path, rel_path, dst);
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if !new_only || time > rrd.last_update() {
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rrd.update(time, value);
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}
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self.map.insert(rel_path.to_string(), rrd);
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}
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Ok(())
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}
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fn flush_rrd_files(&self) -> Result<usize, Error> {
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let mut rrd_file_count = 0;
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let mut errors = 0;
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for (rel_path, rrd) in self.map.iter() {
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rrd_file_count += 1;
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let mut path = self.config.basedir.clone();
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path.push(&rel_path);
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if let Err(err) = rrd.save(&path, self.config.file_options.clone()) {
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errors += 1;
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log::error!("unable to save {:?}: {}", path, err);
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}
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}
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if errors != 0 {
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bail!("errors during rrd flush - unable to commit rrd journal");
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}
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Ok(rrd_file_count)
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}
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fn extract_cached_data(
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&self,
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base: &str,
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name: &str,
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cf: CF,
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resolution: u64,
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start: Option<u64>,
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end: Option<u64>,
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) -> Result<Option<(u64, u64, Vec<Option<f64>>)>, Error> {
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match self.map.get(&format!("{}/{}", base, name)) {
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Some(rrd) => Ok(Some(rrd.extract_data(cf, resolution, start, end)?)),
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None => Ok(None),
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}
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}
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}
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impl RRDCache {
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100
proxmox-rrd/src/cache/rrd_map.rs
vendored
Normal file
100
proxmox-rrd/src/cache/rrd_map.rs
vendored
Normal file
@ -0,0 +1,100 @@
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use std::path::Path;
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use std::sync::Arc;
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use std::collections::HashMap;
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use anyhow::{bail, Error};
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use proxmox::tools::fs::create_path;
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use crate::rrd::{CF, DST, RRD};
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use super::CacheConfig;
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pub struct RRDMap {
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config: Arc<CacheConfig>,
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map: HashMap<String, RRD>,
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load_rrd_cb: fn(path: &Path, rel_path: &str, dst: DST) -> RRD,
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}
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impl RRDMap {
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pub(crate) fn new(
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config: Arc<CacheConfig>,
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load_rrd_cb: fn(path: &Path, rel_path: &str, dst: DST) -> RRD,
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) -> Self {
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Self {
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config,
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map: HashMap::new(),
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load_rrd_cb,
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}
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}
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pub fn update(
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&mut self,
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rel_path: &str,
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time: f64,
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value: f64,
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dst: DST,
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new_only: bool,
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) -> Result<(), Error> {
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if let Some(rrd) = self.map.get_mut(rel_path) {
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if !new_only || time > rrd.last_update() {
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rrd.update(time, value);
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}
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} else {
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let mut path = self.config.basedir.clone();
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path.push(rel_path);
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create_path(
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path.parent().unwrap(),
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Some(self.config.dir_options.clone()),
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Some(self.config.dir_options.clone()),
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)?;
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let mut rrd = (self.load_rrd_cb)(&path, rel_path, dst);
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if !new_only || time > rrd.last_update() {
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rrd.update(time, value);
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}
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self.map.insert(rel_path.to_string(), rrd);
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}
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Ok(())
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}
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pub fn flush_rrd_files(&self) -> Result<usize, Error> {
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let mut rrd_file_count = 0;
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let mut errors = 0;
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for (rel_path, rrd) in self.map.iter() {
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rrd_file_count += 1;
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let mut path = self.config.basedir.clone();
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path.push(&rel_path);
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if let Err(err) = rrd.save(&path, self.config.file_options.clone()) {
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errors += 1;
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log::error!("unable to save {:?}: {}", path, err);
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}
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}
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if errors != 0 {
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bail!("errors during rrd flush - unable to commit rrd journal");
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}
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Ok(rrd_file_count)
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}
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pub fn extract_cached_data(
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&self,
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base: &str,
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name: &str,
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cf: CF,
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resolution: u64,
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start: Option<u64>,
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end: Option<u64>,
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) -> Result<Option<(u64, u64, Vec<Option<f64>>)>, Error> {
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match self.map.get(&format!("{}/{}", base, name)) {
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Some(rrd) => Ok(Some(rrd.extract_data(cf, resolution, start, end)?)),
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None => Ok(None),
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}
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}
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}
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