public void OptimizeParallelInsertsForDifferentGroups()
{
var tests = new ListOfTuples <string, string, bool>
// Format:
// 1. Records to insert (Grouping1-Grouping2) to entity MultipleGroups, with parallel requests.
// 2. Expected generated codes (Code1-Code2) for each record.
// 3. Whether the inserts should be executed in parallel.
{
{ "A-B, A-B", "1-1, 2-2", false }, // Same Grouping1 and Grouping2: codes should be generated sequentially.
{ "A-B, A-C", "1-1, 2-1", false }, // Same Grouping1: Code1 should be generated sequentially.
{ "A-B, C-B", "1-1, 1-2", false }, // Same Grouping2: Code2 should be generated sequentially.
{ "A-B, C-D", "1-1, 1-1", true },
{ "A-B, B-A", "1-1, 1-1", true },
};
var results = new ListOfTuples <string, string, bool>();
var report = new List <string>();
const int testPause = 100;
const int retries = 4;
foreach (var test in tests)
{
for (int retry = 0; retry < retries; retry++)
{
var items = test.Item1.Split(',').Select(item => item.Trim()).Select(item => item.Split('-'))
.Select(item => new TestAutoCode.MultipleGroups {
Grouping1 = item[0], Grouping2 = item[1]
})
.ToArray();
var insertDurations = new double[items.Length];
var parallelInsertRequests = items.Select((item, x) => (Action <Common.ExecutionContext>)
(context =>
{
var sw = Stopwatch.StartNew();
context.Repository.TestAutoCode.MultipleGroups.Insert(item);
insertDurations[x] = sw.Elapsed.TotalMilliseconds;
Thread.Sleep(testPause);
}))
.ToArray();
var exceptions = ExecuteParallel(parallelInsertRequests,
context => context.Repository.TestAutoCode.MultipleGroups.Insert(new TestAutoCode.MultipleGroups {
}),
context => Assert.AreEqual(1, context.Repository.TestAutoCode.MultipleGroups.Query().Count(), $"({test.Item1}) Test initialization failed."));
Assert.IsTrue(exceptions.All(e => e == null), $"({test.Item1}) Test initialization threw exception. See the test output for details");
// Check the generated codes:
string generatedCodes;
using (var container = new RhetosTestContainer(false))
{
var repository = container.Resolve <Common.DomRepository>();
generatedCodes = TestUtility.DumpSorted(
repository.TestAutoCode.MultipleGroups.Load(items.Select(item => item.ID)),
x => $"{x.Code1}-{x.Code2}");
}
// Check if the inserts were executed in parallel:
bool startedImmediately = insertDurations.Any(t => t < testPause);
bool executedInParallel = insertDurations.All(t => t < testPause);
// It the parallelism check did not pass, try again to reduce false negatives when the test machine is under load.
if (!startedImmediately || executedInParallel != test.Item3)
{
Console.WriteLine("Retry");
continue;
}
Assert.IsTrue(startedImmediately, $"({test.Item1}) At lease one item should be inserted without waiting. The test machine was probably under load during the parallelism test.");
report.Add($"Test '{test.Item1}' insert durations: '{TestUtility.Dump(insertDurations)}'.");
results.Add(test.Item1, generatedCodes, executedInParallel);
break;
}
}
Assert.AreEqual(
string.Concat(tests.Select(test => $"{test.Item1} => {test.Item2} {(test.Item3 ? "parallel" : "sequential")}\r\n")),
string.Concat(results.Select(test => $"{test.Item1} => {test.Item2} {(test.Item3 ? "parallel" : "sequential")}\r\n")),
"Report: " + string.Concat(report.Select(line => "\r\n" + line)));
}
