forked from mirrors/jj
f1666375bd
I want to keep the index updated within the transaction. I tried doing that by adding a `trait Index`, implemented by `ReadonlyIndex` and `MutableIndex`. However, `ReadonlyRepo::index` is of type `Mutex<Option<Arc<IndexFile>>>` (because it is lazily initialized), and we cannot get a `&dyn Index` that lives long enough to be returned from a `Repo::index()` from that. It seems the best solution is to instead create an `Index` enum (instead of a trait), with one readonly and one mutable variant. This commit starts the migration to that design by replacing the `Repo` trait by an enum. I never intended for there there to be more implementations of `Repo` than `ReadonlyRepo` and `MutableRepo` anyway.
104 lines
3.7 KiB
Rust
104 lines
3.7 KiB
Rust
// Copyright 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use std::thread;
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use jujube_lib::dag_walk;
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use jujube_lib::repo::ReadonlyRepo;
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use jujube_lib::testutils;
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use jujube_lib::view::View;
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use std::sync::Arc;
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use test_case::test_case;
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fn count_non_merge_operations(repo: &ReadonlyRepo) -> u32 {
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let view = repo.view();
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let op_store = view.op_store();
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let op_head_id = view.base_op_head_id().clone();
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let mut num_ops = 0;
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for op_id in dag_walk::bfs(
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vec![op_head_id],
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Box::new(|op_id| op_id.clone()),
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Box::new(|op_id| op_store.read_operation(&op_id).unwrap().parents),
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) {
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if op_store.read_operation(&op_id).unwrap().parents.len() <= 1 {
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num_ops += 1;
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}
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}
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num_ops
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}
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#[test_case(false ; "local store")]
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#[test_case(true ; "git store")]
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fn test_commit_parallel(use_git: bool) {
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// This loads a Repo instance and creates and commits many concurrent
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// transactions from it. It then reloads the repo. That should merge all the
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// operations and all commits should be visible.
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let settings = testutils::user_settings();
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let (_temp_dir, mut repo) = testutils::init_repo(&settings, use_git);
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let mut threads = vec![];
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for _ in 0..100 {
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let settings = settings.clone();
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let repo = repo.clone();
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let handle = thread::spawn(move || {
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testutils::create_random_commit(&settings, &repo)
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.write_to_new_transaction(&repo, "test");
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});
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threads.push(handle);
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}
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for thread in threads {
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thread.join().ok().unwrap();
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}
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Arc::get_mut(&mut repo).unwrap().reload();
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// One commit per thread plus the commit from the initial checkout on top of the
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// root commit
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assert_eq!(repo.view().heads().len(), 101);
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// One operation for initializing the repo (containing the root id and the
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// initial working copy commit).
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assert_eq!(count_non_merge_operations(&repo), 101);
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}
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#[test_case(false ; "local store")]
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#[test_case(true ; "git store")]
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fn test_commit_parallel_instances(use_git: bool) {
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// Like the test above but creates a new repo instance for every thread, which
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// makes it behave very similar to separate processes.
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let settings = testutils::user_settings();
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let (_temp_dir, repo) = testutils::init_repo(&settings, use_git);
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let mut threads = vec![];
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for _ in 0..100 {
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let settings = settings.clone();
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let repo = ReadonlyRepo::load(&settings, repo.working_copy_path().clone()).unwrap();
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let handle = thread::spawn(move || {
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testutils::create_random_commit(&settings, &repo)
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.write_to_new_transaction(&repo, "test");
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});
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threads.push(handle);
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}
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for thread in threads {
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thread.join().ok().unwrap();
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}
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// One commit per thread plus the commit from the initial checkout on top of the
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// root commit
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let repo = ReadonlyRepo::load(&settings, repo.working_copy_path().clone()).unwrap();
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assert_eq!(repo.view().heads().len(), 101);
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// One operation for initializing the repo (containing the root id and the
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// initial working copy commit).
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assert_eq!(count_non_merge_operations(&repo), 101);
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}
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