private static void Generate(string tempFile, SerializationEngine serializer, List<TestClass> list, Action<Action<int>> loop) { using (var stream = new FileStream(tempFile, FileMode.Create, FileAccess.ReadWrite, FileShare.None)) { var data = new StreamAccessor(stream); var lFile = new LowLevelAppendOnlyFile(data); var file = new GenericAppendOnlyFile<TestClass>(lFile, serializer); // append COUNT records ShowTime("append", () => loop(i => file.Append(list[i]))); // read all the records ShowTime("read all", () => { var records = file.ReadFrom(0).ToList(); }); // read all the records, one at a time ShowTime("read all, one at a time", () => loop(i => file.Read(i))); } // close and reopen the file (rebuilds the index) ShowTime("rebuild index", () => { using (var stream = new FileStream(tempFile, FileMode.Open, FileAccess.ReadWrite, FileShare.None)) { var data = new StreamAccessor(stream); var lFile = new LowLevelAppendOnlyFile(data); } }); }
private static void Main(string[] args) { var serializer = new ProtoBufSerializationEngine(); var list = new List<TestClass>(); for (var i = 0; i < COUNT; i++) { var c = new TestClass {Name = GenerateRandomString(20), Address = GenerateRandomString(40)}; list.Add(c); } var tempFile = Path.GetTempFileName(); Console.WriteLine("Using {0} - sequentially writing and reading {1} records", tempFile, COUNT); Generate(tempFile, serializer, list, SeqForLoop); // verify the data using (var stream = new FileStream(tempFile, FileMode.Open, FileAccess.ReadWrite, FileShare.None)) { var data = new StreamAccessor(stream); var lFile = new LowLevelAppendOnlyFile(data); var file = new GenericAppendOnlyFile<TestClass>(lFile, serializer); var records = file.ReadFrom(0).ToList(); // verify that the index is built correctly for (var i = 0; i < COUNT; i++) { var r = records[i]; Debug.Assert(r.Name == list[i].Name); Debug.Assert(r.Address == list[i].Address); } } // multi-threaded test tempFile = Path.GetTempFileName(); Console.WriteLine("Using {0} - multi-threaded writing and reading {1} records", tempFile, COUNT); Generate(tempFile, serializer, list, ParForLoop); }
public void GenericAppendOnlyFileSmokeTest() { var stream = new MemoryStream(); var data = new StreamAccessor(stream); var file = new LowLevelAppendOnlyFile(data); var serializer = new ProtoBufSerializationEngine(); var sut = new GenericAppendOnlyFile<TestClass>(file, serializer); sut.Append(new TestClass {Name = "Marcel", Address = "Kennesaw, GA"}); sut.Append(new TestClass {Name = "Gigi Meseriasu", Address = "Washington, DC"}); var r1 = sut.Read(0); Assert.AreEqual("Marcel", r1.Name); Assert.AreEqual("Kennesaw, GA", r1.Address); var rs = sut.ReadFrom(0).ToList(); var r2 = rs[1]; Assert.AreEqual("Gigi Meseriasu", r2.Name); Assert.AreEqual("Washington, DC", r2.Address); Assert.AreEqual(2, sut.Index.Length); Assert.AreEqual(0, sut.Index[0]); }