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added Entry update function.

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This commit is contained in:
Jeff Baskin 2023-02-15 12:13:19 -05:00
parent ef48fde890
commit c0e4a5fad7
1 changed files with 110 additions and 20 deletions
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130
src/morethantext/cache.rs
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@ -1,10 +1,12 @@
use super::{DBError, FileData, SessionData, Store};
use async_std::{fs::{read, write}, path::Path};
use async_std::{
fs::{read, remove_file, write},
path::Path,
};
use rand::{distributions::Alphanumeric, thread_rng, Rng};
use std::{
cell::Cell,
slice,
str,
slice, str,
time::{Duration, Instant},
};
@ -50,7 +52,7 @@ impl FileData<Self> for DataType {
output.append(&mut "DBMap".as_bytes().to_vec());
output.push(0);
output.append(&mut store.to_bytes());
},
}
}
output
}
@ -73,11 +75,9 @@ impl FileData<Self> for DataType {
Err(_) => return Err(DBError::new("file corruption")),
};
match header {
"DBMap" => {
match Store::from_bytes(data) {
Ok(store) => Ok(DataType::DBMap(store)),
Err(err) => Err(err),
}
"DBMap" => match Store::from_bytes(data) {
Ok(store) => Ok(DataType::DBMap(store)),
Err(err) => Err(err),
},
_ => Err(DBError::new("file corruption")),
}
@ -120,6 +120,21 @@ impl Entry {
self.last_used.set(Instant::now());
Ok(self.data.clone())
}
async fn update(&mut self, data: DataType) -> Result<(), DBError> {
self.last_used.set(Instant::now());
let filepath = Path::new(&self.filename);
match write(filepath, data.to_bytes()).await {
Ok(_) => (),
Err(err) => {
let mut error = DBError::new("write error");
error.add_source(err);
return Err(error);
}
};
self.data = data;
Ok(())
}
}
struct Cache;
@ -194,7 +209,10 @@ mod datatype_file {
let data = dt_store.to_bytes();
let mut feed = data.iter();
let output = DataType::from_bytes(&mut feed).unwrap();
assert_eq!(dt_store.list(["database"].to_vec()).unwrap(), output.list(["database"].to_vec()).unwrap());
assert_eq!(
dt_store.list(["database"].to_vec()).unwrap(),
output.list(["database"].to_vec()).unwrap()
);
}
#[test]
@ -204,7 +222,10 @@ mod datatype_file {
let data = dt_store.to_bytes();
let mut feed = data.iter();
let output = DataType::from_bytes(&mut feed).unwrap();
assert_eq!(dt_store.list(["database"].to_vec()).unwrap(), output.list(["database"].to_vec()).unwrap());
assert_eq!(
dt_store.list(["database"].to_vec()).unwrap(),
output.list(["database"].to_vec()).unwrap()
);
}
#[test]
@ -216,7 +237,7 @@ mod datatype_file {
Err(err) => {
assert_eq!(err.to_string(), "file corruption");
Ok(())
},
}
}
}
@ -231,7 +252,7 @@ mod datatype_file {
Err(err) => {
assert_eq!(err.to_string(), "file corruption");
Ok(())
},
}
}
}
}
@ -249,9 +270,16 @@ mod entry {
let filepath = dir.path().join("count");
let filename = filepath.to_str().unwrap();
let item = Entry::new(filename.to_string(), data).await.unwrap();
assert!(Duration::from_secs(1) > item.elapsed(), "last_used should have been now.");
item.last_used.set(Instant::now() - Duration::from_secs(500));
assert!(Duration::from_secs(499) < item.elapsed(), "The duration should have increased.");
assert!(
Duration::from_secs(1) > item.elapsed(),
"last_used should have been now."
);
item.last_used
.set(Instant::now() - Duration::from_secs(500));
assert!(
Duration::from_secs(499) < item.elapsed(),
"The duration should have increased."
);
}
#[async_std::test]
@ -264,7 +292,10 @@ mod entry {
let item = Entry::new(filename.to_string(), data.clone())
.await
.unwrap();
assert!(Duration::from_secs(1) > item.elapsed(), "last_used should have been now.");
assert!(
Duration::from_secs(1) > item.elapsed(),
"last_used should have been now."
);
let output = item.get().await.unwrap();
assert_eq!(
data.list(["database"].to_vec()).unwrap(),
@ -286,7 +317,11 @@ mod entry {
Err(err) => {
assert_eq!(err.to_string(), "failed to write");
assert!(err.source().is_some(), "Must include the source error.");
assert!(err.source().unwrap().to_string().contains("could not write to file"));
assert!(err
.source()
.unwrap()
.to_string()
.contains("could not write to file"));
Ok(())
}
}
@ -320,9 +355,64 @@ mod entry {
let filepath = dir.path().join("holder");
let filename = filepath.to_str().unwrap();
let item = Entry::new(filename.to_string(), data).await.unwrap();
item.last_used.set(Instant::now() - Duration::from_secs(300));
item.last_used
.set(Instant::now() - Duration::from_secs(300));
item.get().await.unwrap();
assert!(Duration::from_secs(1) > item.elapsed(), "last_used should have been reset.");
assert!(
Duration::from_secs(1) > item.elapsed(),
"last_used should have been reset."
);
}
#[async_std::test]
async fn update_entry() {
let dir = tempdir().unwrap();
let mut data = DataType::new("store").unwrap();
let filepath = dir.path().join("changing");
let filename = filepath.to_str().unwrap();
let mut item = Entry::new(filename.to_string(), data.clone())
.await
.unwrap();
item.last_used
.set(Instant::now() - Duration::from_secs(500));
data.add("database", "new", "stuff").unwrap();
item.update(data.clone()).await.unwrap();
assert!(
Duration::from_secs(1) > item.elapsed(),
"last_used should have been reset."
);
let output = item.get().await.unwrap();
assert_eq!(
data.list(["database"].to_vec()).unwrap(),
output.list(["database"].to_vec()).unwrap()
);
let content = read(&filepath).await.unwrap();
assert_eq!(content, data.to_bytes());
}
#[async_std::test]
async fn update_write_errors() -> Result<(), DBError> {
let dir = tempdir().unwrap();
let data = DataType::new("store").unwrap();
let filepath = dir.path().join("changing");
let filename = filepath.to_str().unwrap();
let mut item = Entry::new(filename.to_string(), data.clone())
.await
.unwrap();
drop(dir);
match item.update(data).await {
Ok(_) => Err(DBError::new("file writes should return an error")),
Err(err) => {
assert_eq!(err.to_string(), "write error");
assert!(err.source().is_some(), "Must include the source error.");
assert!(err
.source()
.unwrap()
.to_string()
.contains("could not write to file"));
Ok(())
}
}
}
}