mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-06-10 09:29:32 +00:00
6f9c278559
# ⚠️ Breaking Many deprecated queue config options are removed (actually, they should have been removed in 1.18/1.19). If you see the fatal message when starting Gitea: "Please update your app.ini to remove deprecated config options", please follow the error messages to remove these options from your app.ini. Example: ``` 2023/05/06 19:39:22 [E] Removed queue option: `[indexer].ISSUE_INDEXER_QUEUE_TYPE`. Use new options in `[queue.issue_indexer]` 2023/05/06 19:39:22 [E] Removed queue option: `[indexer].UPDATE_BUFFER_LEN`. Use new options in `[queue.issue_indexer]` 2023/05/06 19:39:22 [F] Please update your app.ini to remove deprecated config options ``` Many options in `[queue]` are are dropped, including: `WRAP_IF_NECESSARY`, `MAX_ATTEMPTS`, `TIMEOUT`, `WORKERS`, `BLOCK_TIMEOUT`, `BOOST_TIMEOUT`, `BOOST_WORKERS`, they can be removed from app.ini. # The problem The old queue package has some legacy problems: * complexity: I doubt few people could tell how it works. * maintainability: Too many channels and mutex/cond are mixed together, too many different structs/interfaces depends each other. * stability: due to the complexity & maintainability, sometimes there are strange bugs and difficult to debug, and some code doesn't have test (indeed some code is difficult to test because a lot of things are mixed together). * general applicability: although it is called "queue", its behavior is not a well-known queue. * scalability: it doesn't seem easy to make it work with a cluster without breaking its behaviors. It came from some very old code to "avoid breaking", however, its technical debt is too heavy now. It's a good time to introduce a better "queue" package. # The new queue package It keeps using old config and concept as much as possible. * It only contains two major kinds of concepts: * The "base queue": channel, levelqueue, redis * They have the same abstraction, the same interface, and they are tested by the same testing code. * The "WokerPoolQueue", it uses the "base queue" to provide "worker pool" function, calls the "handler" to process the data in the base queue. * The new code doesn't do "PushBack" * Think about a queue with many workers, the "PushBack" can't guarantee the order for re-queued unhandled items, so in new code it just does "normal push" * The new code doesn't do "pause/resume" * The "pause/resume" was designed to handle some handler's failure: eg: document indexer (elasticsearch) is down * If a queue is paused for long time, either the producers blocks or the new items are dropped. * The new code doesn't do such "pause/resume" trick, it's not a common queue's behavior and it doesn't help much. * If there are unhandled items, the "push" function just blocks for a few seconds and then re-queue them and retry. * The new code doesn't do "worker booster" * Gitea's queue's handlers are light functions, the cost is only the go-routine, so it doesn't make sense to "boost" them. * The new code only use "max worker number" to limit the concurrent workers. * The new "Push" never blocks forever * Instead of creating more and more blocking goroutines, return an error is more friendly to the server and to the end user. There are more details in code comments: eg: the "Flush" problem, the strange "code.index" hanging problem, the "immediate" queue problem. Almost ready for review. TODO: * [x] add some necessary comments during review * [x] add some more tests if necessary * [x] update documents and config options * [x] test max worker / active worker * [x] re-run the CI tasks to see whether any test is flaky * [x] improve the `handleOldLengthConfiguration` to provide more friendly messages * [x] fine tune default config values (eg: length?) ## Code coverage: 
79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
// Copyright 2019 The Gitea Authors.
|
|
// All rights reserved.
|
|
// SPDX-License-Identifier: MIT
|
|
|
|
package pull
|
|
|
|
import (
|
|
"strconv"
|
|
"testing"
|
|
"time"
|
|
|
|
issues_model "code.gitea.io/gitea/models/issues"
|
|
"code.gitea.io/gitea/models/unittest"
|
|
"code.gitea.io/gitea/modules/queue"
|
|
"code.gitea.io/gitea/modules/setting"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
)
|
|
|
|
func TestPullRequest_AddToTaskQueue(t *testing.T) {
|
|
assert.NoError(t, unittest.PrepareTestDatabase())
|
|
|
|
idChan := make(chan int64, 10)
|
|
testHandler := func(items ...string) []string {
|
|
for _, s := range items {
|
|
id, _ := strconv.ParseInt(s, 10, 64)
|
|
idChan <- id
|
|
}
|
|
return nil
|
|
}
|
|
|
|
cfg, err := setting.GetQueueSettings(setting.CfgProvider, "pr_patch_checker")
|
|
assert.NoError(t, err)
|
|
prPatchCheckerQueue, err = queue.NewWorkerPoolQueueBySetting("pr_patch_checker", cfg, testHandler, true)
|
|
assert.NoError(t, err)
|
|
|
|
pr := unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
|
|
AddToTaskQueue(pr)
|
|
|
|
assert.Eventually(t, func() bool {
|
|
pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
|
|
return pr.Status == issues_model.PullRequestStatusChecking
|
|
}, 1*time.Second, 100*time.Millisecond)
|
|
|
|
has, err := prPatchCheckerQueue.Has(strconv.FormatInt(pr.ID, 10))
|
|
assert.True(t, has)
|
|
assert.NoError(t, err)
|
|
|
|
var queueShutdown, queueTerminate []func()
|
|
go prPatchCheckerQueue.Run(func(shutdown func()) {
|
|
queueShutdown = append(queueShutdown, shutdown)
|
|
}, func(terminate func()) {
|
|
queueTerminate = append(queueTerminate, terminate)
|
|
})
|
|
|
|
select {
|
|
case id := <-idChan:
|
|
assert.EqualValues(t, pr.ID, id)
|
|
case <-time.After(time.Second):
|
|
assert.Fail(t, "Timeout: nothing was added to pullRequestQueue")
|
|
}
|
|
|
|
has, err = prPatchCheckerQueue.Has(strconv.FormatInt(pr.ID, 10))
|
|
assert.False(t, has)
|
|
assert.NoError(t, err)
|
|
|
|
pr = unittest.AssertExistsAndLoadBean(t, &issues_model.PullRequest{ID: 2})
|
|
assert.Equal(t, issues_model.PullRequestStatusChecking, pr.Status)
|
|
|
|
for _, callback := range queueShutdown {
|
|
callback()
|
|
}
|
|
for _, callback := range queueTerminate {
|
|
callback()
|
|
}
|
|
|
|
prPatchCheckerQueue = nil
|
|
}
|