private static void Main() { Console.WriteLine("Sample app for concurrent mongodb context by @mkennedy"); var ctx = new DataContext("SampleDriverDb"); if (!ctx.Books.Any()) { Console.WriteLine("Adding sample data."); LoadData(); } Book book = ctx.Books.OrderBy(b => b._id).First(); Console.WriteLine("Let's edit this book: " + book.Name); Console.Write("Enter a new title for the first book: "); book.Name = Console.ReadLine(); Console.Write("Do you want to simulate an edit in between? [Y/N] "); string edit = (Console.ReadLine() ?? "n").Trim().ToLower(); if (edit == "y") { // imagine this ran in another app or page request in parallel. Book bookEdited = ctx.Books.OrderBy(b => b._id).First(); bookEdited.PageCount++; ctx.Save(bookEdited); } var saveMode = ConcurrentSaveOptions.ProtectServerChanges; if (edit == "y") { Console.Write("Do you want to save in 'protect server changes mode' or 'overwrite mode'? [P/O] "); string writeMode = (Console.ReadLine() ?? "p").Trim().ToLower(); saveMode = writeMode == "o" ? ConcurrentSaveOptions.OverwriteServerChanges : ConcurrentSaveOptions.ProtectServerChanges; } Console.WriteLine("Saving your edits..."); Console.WriteLine("Saving with mode: " + saveMode); try { // simple save - protects server changes: ctx.Save(book); ctx.Save(book, saveMode); // pass the save mode so users can test both outcomes. Console.WriteLine("Save successful."); } catch (Exception x) { Console.WriteLine("Save error: " + x); } }
private static void Main() { Console.WriteLine("Sample app for concurrent mongodb context by @mkennedy"); var ctx = new DataContext("SampleDriverDb"); if (!ctx.Books.Any()) { Console.WriteLine("Adding sample data."); LoadData(); } Book book = ctx.Books.OrderBy(b => b._id).First(); Console.WriteLine("Let's edit this book: " + book.Name); Console.Write("Enter a new title for the first book: "); book.Name = Console.ReadLine(); Console.Write("Do you want to simulate an edit in between? [Y/N] "); string edit = (Console.ReadLine() ?? "n").Trim().ToLower(); if (edit == "y") { // imagine this ran in another app or page request in parallel. Book bookEdited = ctx.Books.OrderBy(b => b._id).First(); bookEdited.PageCount++; ctx.Save(bookEdited); } var saveMode = ConcurrentSaveOptions.ProtectServerChanges; if (edit == "y") { Console.Write("Do you want to save in 'protect server changes mode' or 'overwrite mode'? [P/O] "); string writeMode = (Console.ReadLine() ?? "p").Trim().ToLower(); saveMode = writeMode == "o" ? ConcurrentSaveOptions.OverwriteServerChanges : ConcurrentSaveOptions.ProtectServerChanges; } Console.WriteLine("Saving your edits..."); Console.WriteLine("Saving with mode: " + saveMode); try { // simple save - protects server changes: ctx.Save(book); ctx.Save(book, saveMode); // pass the save mode so users can test both outcomes. Console.WriteLine("Save successful."); } catch (Exception x) { Console.WriteLine("Save error: " + x); } }
public static void LoadData() { var ctx = new DataContext("SampleDriverDb"); Book[] books = { new Book { Name = "Book 1", PageCount = 100 }, new Book { Name = "Book 2", PageCount = 200 }, new Book { Name = "Book 3", PageCount = 300 }, new Book { Name = "Book 4", PageCount = 400 } }; foreach (Book book in books) { ctx.Save(book); } }
public static void LoadData() { var ctx = new DataContext("SampleDriverDb"); Book[] books = { new Book {Name = "Book 1", PageCount = 100}, new Book {Name = "Book 2", PageCount = 200}, new Book {Name = "Book 3", PageCount = 300}, new Book {Name = "Book 4", PageCount = 400} }; foreach (Book book in books) { ctx.Save(book); } }