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//! Different aggregators for output.
//!
//! An aggregator is something that "controls the order" of the output. Aggregators can either save
//! all items that they're and output them once the search is finished, or write them straight
//! to the output stream.
//!
//! Aggregators must be shareable across threads, as the search will be multi-threaded. This is why
//! an Aggregator must make sure that the data is protected by a mutex or similar.
use super::{super::LogResult, formats::Format};
use std::{io::Write, sync::Mutex};
pub trait Aggregator: Sync {
fn push_item(&self, item: &LogResult, format: &Format, stream: &mut Write);
fn finish(self, format: &Format, stream: &mut Write);
}
/// An aggregator that just pushes through each item to the output stream without any sorting or
/// whatsoever.
pub struct WriteThrough;
impl Aggregator for WriteThrough {
fn push_item(&self, item: &LogResult, format: &Format, stream: &mut Write) {
let text = format.format_result(item);
println!("Aggregator::push_item {:?}", text);
stream.write_all(text.as_bytes()).unwrap();
}
fn finish(self, format: &Format, stream: &mut Write) {}
}
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