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use std::sync::Arc;
use file_system::{get_io_rate_limiter, get_io_type, IOOp, IORateLimiter};
pub trait FileSystemInspector: Sync + Send {
fn read(&self, len: usize) -> Result<usize, String>;
fn write(&self, len: usize) -> Result<usize, String>;
}
pub struct EngineFileSystemInspector {
limiter: Option<Arc<IORateLimiter>>,
}
impl EngineFileSystemInspector {
#[allow(dead_code)]
pub fn new() -> Self {
EngineFileSystemInspector {
limiter: get_io_rate_limiter(),
}
}
pub fn from_limiter(limiter: Option<Arc<IORateLimiter>>) -> Self {
EngineFileSystemInspector { limiter }
}
}
impl FileSystemInspector for EngineFileSystemInspector {
fn read(&self, len: usize) -> Result<usize, String> {
if let Some(limiter) = &self.limiter {
let io_type = get_io_type();
Ok(limiter.request(io_type, IOOp::Read, len))
} else {
Ok(len)
}
}
fn write(&self, len: usize) -> Result<usize, String> {
if let Some(limiter) = &self.limiter {
let io_type = get_io_type();
Ok(limiter.request(io_type, IOOp::Write, len))
} else {
Ok(len)
}
}
}