Enterprise Library 3.0 Policy Injection Applicatoin Block
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Enterprise Library 3.0 Policy Injection Applicatoin Block
- 1. Introducing the Policy Injection Application Block
- 4. Enterprise Library 3.0 Application Blocks Caching Security Data Access Logging Exception Handling Config Helpers & Design Instrumen- tation Object Builder Cryptography Core Policy Injection Validation
- 8. Sample Method Customer GetCustomerById(int id) { if (id < 0) throw new ArgumentException("Invalid Customer Id"); Customer customer = HttpContext.Current.Cache.Get(id.ToString()) as Customer; if (customer != null) return customer; try { Database db = DatabaseFactory.CreateDatabase("CRM"); using (IDataReader reader = db.ExecuteReader("spGetCustomerById", id)) { if (reader.Read()) { customer = new Customer(id, reader.GetString(0), reader.GetString(1)); HttpContext.Current.Cache.Add(id.ToString(), customer, null, DateTime.Now.AddMinutes(1), Cache.NoSlidingExpiration, CacheItemPriority.Normal, null); return customer; } } return null; } catch (Exception ex) { if (ExceptionPolicy.HandleException(ex, "Data Policy")) throw; return null; } }
- 10. Sample Method with Policy Injection [ValidationCallHandler] [CachingCallHandler(0, 1, 0)] [Tag("Data Access")] Customer GetCustomerById( [RangeValidator(0, RangeBoundaryType.Inclusive, 0, RangeBoundaryType.Ignore)] int id) { Database db = DatabaseFactory.CreateDatabase("CRM"); using (IDataReader reader = db.ExecuteReader("spGetCustomerById", id)) { if (reader.Read()) { return new Customer(id, reader.GetString(0), reader.GetString(1)); } } }
Editor's Notes
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