更新

im/server-fix-20260831/test_cache_concurrency.py

@@ -0,0 +1,30 @@
+import concurrent.futures
+import os
+import subprocess
+import tempfile
+
+base = '/www/backup/txiaw-mysql-fix-20260831'
+root = tempfile.mkdtemp(prefix='cache-concurrency-', dir=base)
+php = '/www/server/php/56/bin/php'
+source = r'''
+require $argv[1];
+$directory = $argv[2];
+$loader = function () use ($directory) {
+    file_put_contents($directory . '/loader-calls', "called\n", FILE_APPEND | LOCK_EX);
+    usleep(100000);
+    return array(array('news_id' => 42, 'news_name' => 'Concurrency fixture'));
+};
+$result = txiaw_home_news_cached($directory, $loader);
+if ($result[0]['news_id'] !== 42) { exit(2); }
+echo "ok\n";
+'''
+
+def worker(_):
+    return subprocess.run([php, '-n', '-r', source, base + '/stage/HomeNewsCache.php', root], stdout=subprocess.PIPE, stderr=subprocess.PIPE, universal_newlines=True, timeout=5)
+
+with concurrent.futures.ThreadPoolExecutor(max_workers=8) as pool:
+    results = list(pool.map(worker, range(8)))
+assert all(p.returncode == 0 and p.stdout.strip() == 'ok' for p in results), [(p.returncode, p.stdout, p.stderr) for p in results]
+calls = open(root + '/loader-calls').read().splitlines()
+assert len(calls) == 1, 'Concurrent cold requests executed %s loader calls' % len(calls)
+print('PASS: 8 simultaneous cold requests returned the same data with exactly 1 loader call.')