refactor cache
Signed-off-by: Frank Villaro-Dixon <frank@villaro-dixon.eu>
This commit is contained in:
parent
6773fee70b
commit
f34e8ba309
62
Cargo.lock
generated
62
Cargo.lock
generated
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@ -37,6 +37,8 @@ dependencies = [
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"serde",
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"serde_json",
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"tokio",
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"tower",
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"tower-http",
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"tracing",
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"tracing-subscriber",
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]
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@ -385,6 +387,12 @@ dependencies = [
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"syn",
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]
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[[package]]
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name = "futures-sink"
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version = "0.3.30"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9fb8e00e87438d937621c1c6269e53f536c14d3fbd6a042bb24879e57d474fb5"
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[[package]]
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name = "futures-task"
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version = "0.3.30"
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@ -522,6 +530,12 @@ dependencies = [
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"pin-project-lite",
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]
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[[package]]
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name = "http-range-header"
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version = "0.4.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "3ce4ef31cda248bbdb6e6820603b82dfcd9e833db65a43e997a0ccec777d11fe"
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[[package]]
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name = "httparse"
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version = "1.8.0"
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@ -658,6 +672,16 @@ version = "0.3.17"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
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[[package]]
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name = "mime_guess"
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version = "2.0.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "4192263c238a5f0d0c6bfd21f336a313a4ce1c450542449ca191bb657b4642ef"
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dependencies = [
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"mime",
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"unicase",
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]
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[[package]]
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name = "minimal-lexical"
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version = "0.2.1"
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@ -1231,6 +1255,19 @@ dependencies = [
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"syn",
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]
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[[package]]
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name = "tokio-util"
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version = "0.7.10"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5419f34732d9eb6ee4c3578b7989078579b7f039cbbb9ca2c4da015749371e15"
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dependencies = [
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"bytes",
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"futures-core",
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"futures-sink",
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"pin-project-lite",
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"tokio",
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]
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[[package]]
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name = "tower"
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version = "0.4.13"
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@ -1247,6 +1284,31 @@ dependencies = [
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"tracing",
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]
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[[package]]
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name = "tower-http"
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version = "0.5.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1e9cd434a998747dd2c4276bc96ee2e0c7a2eadf3cae88e52be55a05fa9053f5"
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dependencies = [
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"bitflags 2.5.0",
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"bytes",
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"futures-util",
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"http",
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"http-body",
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"http-body-util",
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"http-range-header",
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"httpdate",
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"mime",
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"mime_guess",
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"percent-encoding",
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"pin-project-lite",
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"tokio",
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"tokio-util",
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"tower-layer",
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"tower-service",
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"tracing",
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]
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[[package]]
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name = "tower-layer"
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version = "0.3.2"
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@ -14,5 +14,7 @@ moka = { version = "0.12.5", features = ["future"] }
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serde = { version = "1.0.197", features = ["derive"] }
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serde_json = "1.0.115"
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tokio = { version = "1.37.0", features = ["full"] }
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tower = "0.4.13"
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tower-http = { version = "0.5.2", features = ["fs"]}
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tracing = "0.1.40"
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tracing-subscriber = "0.3.18"
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@ -17,7 +17,7 @@ RUN cargo build --release --bin api-server
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# We do not need the Rust toolchain to run the binary!
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FROM debian:bookworm-slim AS runtime
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RUN apt update && apt install -y libgdal-dev
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RUN apt update && apt install -y gdal-bin
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WORKDIR /app
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COPY --from=builder /app/target/release/api-server /usr/local/bin
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ENTRYPOINT ["/usr/local/bin/api-server"]
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86
src/dem.rs
86
src/dem.rs
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@ -1,52 +1,85 @@
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use std::sync::Arc;
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use std::env;
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use gdal::errors::GdalError;
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use gdal::Dataset;
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use tracing::{info, debug_span, debug};
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use tracing::{debug, debug_span, info};
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use moka::future::Cache;
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pub struct MyDataset{pub ds: Dataset}
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unsafe impl Send for MyDataset{}
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unsafe impl Sync for MyDataset{}
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pub struct MyDataset {
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pub ds: Dataset,
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}
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unsafe impl Send for MyDataset {}
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unsafe impl Sync for MyDataset {}
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pub type DSC = Cache<String, Arc<MyDataset>>;
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pub fn new_cache(max_elems: u64) -> DSC {
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Cache::builder()
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// Up to 10,000 entries.
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.max_capacity(max_elems)
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// Create the cache.
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.build()
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pub struct DatasetRepository {
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cache: Cache<String, Arc<MyDataset>>,
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basedir: String,
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}
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pub async fn elevation_from_coordinates(dsc: DSC, lat: f64, lon: f64) -> f64 {
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unsafe impl Send for DatasetRepository {}
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unsafe impl Sync for DatasetRepository {}
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impl DatasetRepository {
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pub fn new(basedir: String) -> Self {
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let c = Cache::builder()
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.max_capacity(100)
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// Create the cache.
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.build();
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DatasetRepository { cache: c, basedir }
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}
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async fn get(&self, filename: String) -> Arc<MyDataset> {
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let full_filename = format!("{}/{filename}", self.basedir);
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if !self.cache.contains_key(&full_filename) {
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info!("Will open {full_filename} because not in cache!");
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let ds = Arc::new(MyDataset {
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ds: Dataset::open(full_filename.clone()).unwrap(),
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});
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self.cache.insert(full_filename.clone(), ds).await;
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}
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match self.cache.get(&full_filename).await {
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Some(dataset_arc) => dataset_arc,
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None => panic!("foo")
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}
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}
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}
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impl Clone for DatasetRepository {
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fn clone(&self) -> Self {
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Self {
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basedir: self.basedir.clone(),
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cache: self.cache.clone(),
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}
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}
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}
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pub async fn elevation_from_coordinates(dr: DatasetRepository, lat: f64, lon: f64) -> f64 {
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let span = debug_span!("req", lat=%lat, lon=%lon);
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let _guard = span.enter();
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let filename = get_filename_from_latlon(lat, lon);
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debug!(filename, "filename");
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if !dsc.contains_key(&filename) {
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info!("Will open {filename} because not in cache!");
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let ds = Arc::new(MyDataset{ds:Dataset::open(filename.clone()).unwrap()});
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dsc.insert(filename.clone(), ds).await;
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}
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let ds = &dsc.get(&filename).await.unwrap().ds;
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let ds = &dr.get(filename).await.ds;
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let (px, py) = geo_to_pixel(ds, lat, lon).unwrap();
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let raster_band = ds.rasterband(1).unwrap();
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let raster_value = raster_band.read_as::<f64>((px, py), (1, 1), (1, 1), None).unwrap();
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let raster_value = raster_band
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.read_as::<f64>((px, py), (1, 1), (1, 1), None)
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.unwrap();
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raster_value.data[0]
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}
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fn get_filename_from_latlon(lat: f64, lon: f64) -> String {
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// Calculate the rounded values for latitude and longitude
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// Calculate the rounded values for latitude and longitude
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let rounded_lat = lat.floor();
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let rounded_lon = lon.floor();
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@ -58,16 +91,13 @@ fn get_filename_from_latlon(lat: f64, lon: f64) -> String {
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let lat_prefix = if rounded_lat >= 0.0 { "N" } else { "S" };
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let lon_prefix = if rounded_lon >= 0.0 { "E" } else { "W" };
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let filename_prefix = env::var("DEM_LOCATION").unwrap_or("/data".to_string());
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// Construct the filename
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let filename = format!(
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"{filename_prefix}/Copernicus_DSM_30_{}{}_00_{}{}_00_DEM.tif",
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"Copernicus_DSM_30_{}{}_00_{}{}_00_DEM.tif",
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lat_prefix, lat_deg, lon_prefix, lon_deg
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);
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filename
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}
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fn geo_to_pixel(dataset: &Dataset, lat: f64, lon: f64) -> Result<(isize, isize), GdalError> {
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49
src/main.rs
49
src/main.rs
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@ -1,47 +1,64 @@
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mod dem;
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use std::env;
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use axum_macros::debug_handler;
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use axum::{
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extract::{Path, State}, routing::{get}, Router
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extract::{Path, State},
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routing::get,
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Router,
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};
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use dem::{DSC, new_cache};
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use axum_macros::debug_handler;
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use std::env;
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use tower_http::services::ServeDir;
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use dem::DatasetRepository;
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use tracing::info;
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const DEFAULT_DATA_DIR: &str = "/data";
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const DEFAULT_PORT: &str = "3000";
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#[tokio::main(flavor = "current_thread")]
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//#[tokio::main(flavor = "current_thread")]
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#[tokio::main]
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async fn main() {
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// initialize tracing
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tracing_subscriber::fmt::init();
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let cache = new_cache(1000);
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let config = load_config().unwrap();
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let cache = DatasetRepository::new(config.basedir);
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let serve_dir = ServeDir::new("assets");
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// build our application with a route
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let app = Router::new()
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.route("/elevation/:lat/:lon", get(get_elevation))
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.nest_service("/", serve_dir)
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.with_state(cache);
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let port = env::var("HTTP_PORT").unwrap_or("3000".to_string());
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let host = format!("[::]:{port}");
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let host = format!("[::]:{}", config.port);
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info!("Will start server on {host}");
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let listener = tokio::net::TcpListener::bind(host).await.unwrap();
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axum::serve(listener, app).await.unwrap();
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}
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#[debug_handler]
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async fn get_elevation(State(shared): State<DSC>, Path((lat, lon)): Path<(f64, f64)>) -> String{
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let ele = dem::elevation_from_coordinates(shared, lat, lon);
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async fn get_elevation(State(dsr): State<DatasetRepository>, Path((lat, lon)): Path<(f64, f64)>) -> String {
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let ele = dem::elevation_from_coordinates(dsr, lat, lon);
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let myele = ele.await;
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format!("{myele}")
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}
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fn load_config() -> Result<Config, env::VarError> {
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Ok(Config {
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basedir: env::var("DEM_LOCATION").unwrap_or_else(|_| DEFAULT_DATA_DIR.to_string()),
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port: env::var("HTTP_PORT").unwrap_or_else(|_| DEFAULT_PORT.to_string()),
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})
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}
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struct Config {
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basedir: String,
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port: String,
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}
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