| Pitfall | Solution found in the PDF | | :--- | :--- | | | You forgot to add $METHODINFO ON or mark the method as published . | | Memory leak on the server | You created an object inside a server method but didn't pass Ownership to the TJSONObject. | | Android/iOS can't connect | You used TDSTCPServerTransport (port 211). The PDF advises switching to HTTP (port 8080) for mobile. | | DataSet is "read-only" on client | DataSnap streams a snapshot. To apply updates back, you must send TDataSetDelta or use TDataSetProvider with ResolveToDataSet . |
The evolution of enterprise application development demanded a shift from traditional two-tier (client-server) models to more scalable, secure, and maintainable n-tier architectures. DataSnap, originally known as MIDAS (Multi-tier Distributed Application Services Suite), was a pioneering framework. In Delphi XE2, DataSnap reached a maturity milestone by fully embracing REST (Representational State Transfer) and JSON (JavaScript Object Notation), moving beyond its COM/DCOM roots. "Delphi XE2 DataSnap Development Essentials" serves as a foundational text for developers aiming to leverage these features. Delphi XE2 DataSnap Development Essentials.pdf
Here are some best practices to keep in mind when developing with Delphi XE2 DataSnap: | Pitfall | Solution found in the PDF
Delphi XE2 DataSnap Development Essentials.pdf is more than just a historical document. It is the clearest, most concise distillation of how to build secure, scalable middle-tiers using native Delphi code. The PDF advises switching to HTTP (port 8080) for mobile