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//! JSON Export Helper
// using closures as a Result/? hack
#![allow(clippy::redundant_closure_call)]
#[macro_use]
extern crate clap;
#[macro_use]
extern crate log;
#[macro_use]
extern crate failure;
use clap::{App, Arg};
use fatcat::entity_crud::*;
use fatcat::errors::Result;
use fatcat::identifiers::FatcatId;
use fatcat::server::{self, DbConn};
use fatcat_api_spec::models::*;
use std::str::FromStr;
use uuid::Uuid;
use crossbeam_channel as channel;
use std::io::prelude::*;
use std::io::{BufReader, BufWriter};
use std::thread;
const CHANNEL_BUFFER_LEN: usize = 200;
arg_enum! {
#[derive(PartialEq, Debug, Clone, Copy)]
pub enum ExportEntityType {
Creator,
Container,
File,
Fileset,
Webcapture,
Release,
Work,
Changelog,
}
}
struct IdentRow {
ident_id: FatcatId,
rev_id: Option<Uuid>,
redirect_id: Option<FatcatId>,
index: Option<u64>,
}
macro_rules! generic_loop_work {
($fn_name:ident, $entity_model:ident) => {
fn $fn_name(
row_receiver: channel::Receiver<IdentRow>,
output_sender: channel::Sender<String>,
db_conn: &DbConn,
expand: Option<ExpandFlags>,
) {
let result: Result<()> = (|| {
for row in row_receiver {
let mut entity = $entity_model::db_get_rev(
db_conn,
row.rev_id.expect("valid, non-deleted row"),
HideFlags::none(),
)?; // .chain_err(|| "reading entity from database")?;
entity.state = Some("active".to_string()); // only active lines were passed
entity.ident = Some(row.ident_id.to_string());
if let Some(expand) = expand {
entity.db_expand(db_conn, expand)?
// chain_err(|| "expanding sub-entities from database")?;
}
output_sender.send(serde_json::to_string(&entity)?);
}
Ok(())
})();
if let Err(ref e) = result {
error!("{}", e); // e.display_chain())
}
result.unwrap()
}
};
}
generic_loop_work!(loop_work_container, ContainerEntity);
generic_loop_work!(loop_work_creator, CreatorEntity);
generic_loop_work!(loop_work_file, FileEntity);
generic_loop_work!(loop_work_fileset, FilesetEntity);
generic_loop_work!(loop_work_webcapture, WebcaptureEntity);
generic_loop_work!(loop_work_release, ReleaseEntity);
generic_loop_work!(loop_work_work, WorkEntity);
fn look_work_changelog(row_receiver: channel::Receiver<IdentRow>, output_sender: channel::Sender<String>, db_conn: &DbConn, expand: Option<ExpandFlags>) {
let result: Result<()> = (|| {
for row in row_receiver {
let cl_row: ChangelogRow = changelog::table.find(row.index.unwrap()).first(conn)?;
let editgroup =
self.get_editgroup_handler(conn, FatcatId::from_uuid(&cl_row.editgroup_id))?;
let mut entry = cl_row.into_model();
entry.editgroup = Some(editgroup);
Ok(entry)
let mut entity = ChangelogEntry::db_get_rev(
db_conn,
row.rev_id.expect("valid, non-deleted row"),
HideFlags::none(),
)?; // .chain_err(|| "reading entity from database")?;
entity.state = Some("active".to_string()); // only active lines were passed
entity.ident = Some(row.ident_id.to_string());
if let Some(expand) = expand {
entity.db_expand(db_conn, expand)?
// chain_err(|| "expanding sub-entities from database")?;
}
output_sender.send(serde_json::to_string(&entity)?);
}
Ok(())
})();
if let Err(ref e) = result {
error!("{}", e); // e.display_chain())
}
result.unwrap()
}
fn loop_printer(
output_receiver: channel::Receiver<String>,
done_sender: channel::Sender<()>,
) -> Result<()> {
let output = std::io::stdout();
// TODO: should log?
// let mut buf_output = BufWriter::new(output.lock());
let mut buf_output = BufWriter::new(output);
for line in output_receiver {
buf_output.write_all(&line.into_bytes())?;
buf_output.write_all(b"\n")?;
buf_output.flush()?;
}
drop(done_sender);
Ok(())
}
fn parse_line(s: &str) -> Result<IdentRow> {
let fields: Vec<String> = s.split('\t').map(|v| v.to_string()).collect();
if fields.len() != 3 {
bail!("Invalid input line");
}
Ok(IdentRow {
ident_id: FatcatId::from_uuid(&Uuid::from_str(&fields[0])?),
rev_id: match fields[1].as_ref() {
"" => None,
val => Some(Uuid::from_str(&val)?),
},
redirect_id: match fields[2].as_ref() {
"" => None,
val => Some(FatcatId::from_uuid(&Uuid::from_str(&val)?)),
},
index: None,
})
}
fn parse_line_changelog(s: &str) -> Result<IdentRow> {
let fields: Vec<String> = s.split('\t').map(|v| v.to_string()).collect();
if fields.len() != 3 {
bail!("Invalid input line");
}
Ok(IdentRow {
ident_id: FatcatId::from_uuid(&Uuid::from_str(&fields[1])?),
rev_id: None,
redirect_id: None,
index: fields[0].parse::<u64>()?,
})
}
#[test]
fn test_parse_line() {
assert!(parse_line(
"00000000-0000-0000-3333-000000000001\t00000000-0000-0000-3333-fff000000001\t"
)
.is_ok());
assert!(parse_line(
"00000-0000-0000-3333-000000000001\t00000000-0000-0000-3333-fff000000001\t"
)
.is_err());
assert!(
parse_line("00000-0000-0000-3333-000000000001\t00000000-0000-0000-3333-fff000000001")
.is_err()
);
assert!(parse_line("00000000-0000-0000-3333-000000000002\t00000000-0000-0000-3333-fff000000001\t00000000-0000-0000-3333-000000000001").is_ok());
}
#[test]
fn test_parse_line_changelog() {
assert!(parse_line(
"8\t94f11d0d-32c0-49fb-a71e-f3835af56582\t2019-01-23 20:51:50.321105-08"
)
.is_ok());
assert!(parse_line(
"\t94f11d0d-32c0-49fb-a71e-f3835af56582\t2019-01-23 20:51:50.321105-08"
)
.is_err());
assert!(parse_line(
"8\t94f11d0d-32c0-49fb-a71e-f3835af56582\t"
)
.is_err());
}
// Use num_cpus/2, or CLI arg for worker count
//
// 1. open buffered reader, buffered writer, and database pool. create channels
// 2. spawn workers:
// - get a database connection from database pool
// - iterate over row channel, pushing Strings to output channel
// - exit when end of rows
// 3. spawn output printer
// 4. read rows, pushing to row channel
// => every N lines, log to stderr
// 5. wait for all channels to finish, and quit
pub fn do_export(
num_workers: usize,
expand: Option<ExpandFlags>,
entity_type: ExportEntityType,
redirects: bool,
) -> Result<()> {
let db_pool = server::database_worker_pool()?;
let buf_input = BufReader::new(std::io::stdin());
let (row_sender, row_receiver) = channel::bounded(CHANNEL_BUFFER_LEN);
let (output_sender, output_receiver) = channel::bounded(CHANNEL_BUFFER_LEN);
let (done_sender, done_receiver) = channel::bounded(0);
info!("Starting an export of {} entities", entity_type);
// Start row worker threads
assert!(num_workers > 0);
for _ in 0..num_workers {
let db_conn = db_pool.get().expect("database pool");
let row_receiver = row_receiver.clone();
let output_sender = output_sender.clone();
match entity_type {
ExportEntityType::Container => thread::spawn(move || {
loop_work_container(row_receiver, output_sender, &db_conn, expand)
}),
ExportEntityType::Creator => thread::spawn(move || {
loop_work_creator(row_receiver, output_sender, &db_conn, expand)
}),
ExportEntityType::File => { thread::spawn(move ||
loop_work_file(row_receiver, output_sender, &db_conn, expand))
}
ExportEntityType::Fileset => thread::spawn(move || {
loop_work_fileset(row_receiver, output_sender, &db_conn, expand)
}),
ExportEntityType::Webcapture => thread::spawn(move || {
loop_work_webcapture(row_receiver, output_sender, &db_conn, expand)
}),
ExportEntityType::Release => thread::spawn(move || {
loop_work_release(row_receiver, output_sender, &db_conn, expand)
}),
ExportEntityType::Work => { thread::spawn(move ||
loop_work_work(row_receiver, output_sender, &db_conn, expand))
},
ExportEntityType::Release => thread::spawn(move || {
loop_work_changelog(row_receiver, output_sender, &db_conn, expand)
}),
};
}
drop(output_sender);
// Start printer thread
thread::spawn(move || loop_printer(output_receiver, done_sender).expect("printing to stdout"));
let mut count = 0;
for line in buf_input.lines() {
let line = line?;
if ExportEntityType == ExportEntityType::Changelog {
let change_row = parse_line_changelog(&line)?;
row_sender.send(change_row);
} else {
let row = parse_line(&line)?;
match (row.rev_id, row.redirect_id, redirects) {
(None, _, _, _) => (),
(Some(_), Some(_), false, None) => (),
_ => row_sender.send(row),
}
}
count += 1;
if count % 1000 == 0 {
info!("processed {} lines...", count);
}
}
drop(row_sender);
done_receiver.recv();
info!(
"Done reading ({} lines), waiting for workers to exit...",
count
);
Ok(())
}
fn main() -> Result<()> {
let m = App::new("fatcat-export")
.version(env!("CARGO_PKG_VERSION"))
.author("Bryan Newbold <bnewbold@archive.org>")
.about("Fast exports of database entities from an id list")
.arg(Arg::from_usage("<entity_type> 'what entity type the idents correspond to'")
.possible_values(&ExportEntityType::variants())
.case_insensitive(true))
.args_from_usage(
"-j --workers=[workers] 'number of threads (database connections) to use'
-q --quiet 'less status output to stderr'
--include-redirects 'include redirected idents (normally skipped)'
--expand=[expand] 'sub-entities to include in dump'")
.after_help("Reads a ident table TSV dump from stdin (aka, ident_id, rev_id, redirect_id), \
and outputs JSON (one entity per line). Database connection info read from environment \
(DATABASE_URL, same as fatcatd).")
.get_matches();
let num_workers: usize = match m.value_of("workers") {
Some(_) => value_t_or_exit!(m.value_of("workers"), usize),
None => std::cmp::min(1, num_cpus::get() / 2) as usize,
};
let expand = match m.value_of("expand") {
Some(s) => Some(ExpandFlags::from_str(&s)?),
None => None,
};
let log_level = if m.is_present("quiet") {
"warn"
} else {
"info"
};
let env = env_logger::Env::default().filter_or(env_logger::DEFAULT_FILTER_ENV, log_level);
env_logger::Builder::from_env(env).init();
do_export(
num_workers,
expand,
value_t_or_exit!(m.value_of("entity_type"), ExportEntityType),
m.is_present("include_redirects"),
)
}
|