Post on 23-Nov-2015
transcript
in ACTION!
The next generation application platform for business
Embarcadero Reinvents Business
Application Development!
Pawel Glowacki
European Technical Lead for Delphi and RAD Studio
http://blogs.embarcadero.com/pawelglowacki
Agenda
0830-0900 Registrations 0900-0915 Embarcadero Overview 0915-0930 Introduction to AppWave 0930-1030 RAD Studio XE2 Overview 1030-1045 Coffee break 1045-1145 FireMonkey Deep Dive 1145-1215 Delphi 64-bit and VCL Styles 1215-1330 Lunch & coffee 1330-1400 LiveBindings Deep Dive 1400-1430 RAD Cloud Services 1430-1500 Q&A
Embarcadero Overview
Embarcadero provides
database professionals
and application developers
with award-winning software tools
to design, build and run their systems
in the environment they choose
Who is Embarcadero?
Developers, DBAs, and
Architects Embarcadero Has You Covered
Introduction to AppWave
RAD Studio XE2 Overview
The ultimate application development suite for Windows,
Macintosh, Mobile, and Web
Fast Native applications for Windows, Macintosh, Web and Mobile
Write app once, compile for multiple platforms
Data-rich, Component-based
Delphi and C++ native code performance
Delphi for 64-bit Windows
VCL Styles
RadPHP for full visual web development
Introducing
Stunning HD and 3D Business Applications
Native Power and Performance Connect with any Data
and Services Full Suite of UI Controls Visualize Live Data Styled Vector UIs
without coding Communicate with Animations No-Code Hardware Effects
The Next Generation Business Application Platform
Applications that Connect Everywhere
High-speed connectivity to popular databases
Multi-tier applications
Clients on multiple computers and devices
Connect to the world of data, services, and the cloud
Mobile choices for you and your users
Native mobile apps for DataSnap iOS, Android, Blackberry,
and Windows Phone 7
Delphi and C++Builder DataSnap Servers
Mobile-optimized PHP web apps Web apps that look great
Web apps that work great on mobile devices
Package applications for distribution
Sell on Apple App Store and Android Marketplace
And one more thing
Create native iOS apps
Use the RAD Studio XE2 IDE
Create a Delphi FireMonkey application
Compile for iOS
Run on iPhone, iPad, iPod Touch
Your rich app, your rich data, everywhere
Demonstrations
RAD Studio XE2
and more!
Delphi XE2
The fastest way to build native Windows, Mac and iOS applications
New in Delphi XE2
64-bit Windows development
Target Windows, Mac, and iOS
Create visually stunning applications
VCL Styles Connect with more data and services
New and updated tools including Fast Report and
Documentation Insight
C++Builder XE2
Rapid visual C++ development environment
New in C++Builder XE2
Target both Windows and Mac
Create visually stunning applications
VCL styles Connect with more data and services
New and updated tools including Fast Report
C++ audits and metrics
RadPHP XE2
The fastest way to build applications for Web, Facebook and mobile
New in RadPHP XE2
JQueryMobile visual, component-based
development of mobile optimized web pages
Create iOS and Android applications that you can sell on
the Apple and Android app stores
Zend Framework components for email,
feeds, Google docs and more
Embarcadero Prism XE2
Pascal development for .NET and Mono
New in Prism XE2
All new Oxygene Compiler 5.0 from RemObjects
Inline errors in editor with details, ranges & notes
Live compiler errors in the code editor
Fix-It support for selected new errors
Language soft interfaces and duck typing
Anonymous interface implementation
Enhanced Oxidizer integration
RAD Studio XE2 Developer Toolbox
Quickly design and generate reports with FastReport
Deploy high performance database applications with
InterBase XE
Incorporate graphs and charts using TeeChart (VCL & FireMonkey)
Document your Delphi code with Documentation Insight
RAD Studio XE2 Developer Toolbox
Compare files with Beyond Compare differ
Ensure high performance with AQtime
Automate your build process with FinalBuilder
Build Web applications with IntraWeb
RAD Studio XE2 Developer Toolbox
Locate problems more quickly with CodeSite logging
Add a professional look with glyFX Icon Library
Use InstallAware to create your software installers
Get a jump start on component-based internet development with
IP*Works
RAD Studio XE2 Developer Toolbox
Create reports with Rave Reports
Indy (Internet Direct) Internet component suite for popular
internet protocols
Partner DVD available online with even more free tools!
RAD Studio XE2 Editions for Every Developer
Starter (Delphi/C++Builder)
Professional
Enterprise
Ultimate
Architect
RAD Studio XE2
Deliver Fast Native Applications on Windows, Mac, Web and Mobile
Speed Up Your Development Process with RAD
Create Visually Stunning and Interactive Business Applications
Build Applications that Connect Everywhere
Break Free from Grids Visualize Live Data
The ultimate application development suite for Windows, Mac, mobile and Web
Coffee Break
FireMonkey Deep Dive
The Next Generation
of Business Application Development
Media and graphics Rich user experiences
Intuitive and interactive easy to learn
Simulated real world physics
Touch and motion interaction
Consumer Software Renaissance
Business/Industry Software Stuck in Past
90s Windows user experiences
Confined to mouse/keyboard interaction
Complex to learn - slow to use
Key Markets
ISVs / Packaged Software
Healthcare / Medical
Manufacturing
Financial Services
Telecommunications
Energy
Aviation & Automotive
BioSciences
Pharmaceuticals
Utilities
User Experience
VCL
MFC
UE Performance
UE
Ric
hn
ess
Business SW is stuck here
FireMonkey
Introducing FireMonkey!
FireMonkey
Rich Application Platform for Business
Native CPU and GPU performance
Built-in Enterprise Database connectivity
Windows, Mac, and iOS
FireMonkey is not
Managed RIA
HTML5/CSS3 Game Engine
FireMonkey is App Development Platform
Delphi C++Builder
Windows Mac OS iOS
VCL and FireMonkey
Win Mac iOS
VCL
FM
Native CPU/GPU Application Platform
Compile natively to Windows, Mac, and iOS
Application, Database, and Animation are CPU powered
All UI, Graphics, and Effects are GPU powered
HD Forms
High performance GPU powered Scalable Vector Uis
Maximum resolution on any device
Hundreds of visual UI components
GPU based Style Engine to control UI look & feel
HUDs with transparencies and transition effects
3D Forms
GPU powered 3D Forms
Hardware based lighting, textures, and animation
3D Forms can contain HD UI elements and effects
Effects & Animation
50+ Photoshop-like GPU Effects
Simultaneous multiple effects without performance hit
Path based animation for all HD and 3D UI and graphics
FireMonkey Overview
Cross-platform
Modern themed/skinned UIs
Real-time image and animation effects
Direct2D, D3D, Quartz and OpenGL
Native Delphi and C++
100% Object Pascal Framework
FireMonkey technology
Mac
HD use Quartz
3D rendering on Mac is OpenGL
Windows
Direct2D for HD
Direct3D for 3D
FireMonkey use GDI+ for HD vector forms/controls, when Direct2D is not available
FireMonkey HD, 3D, and GPU
FireMonkey takes advantage of GPU whenever possible
HD Form can be rendered on a computer without a GPU with a few restrictions: No TViewport3D, No Shader based Filters
A 3D Form requires a GPU - performs sophisticated transitions and manipulations of the user interface
in other words, a 3D form may be the best
choice for building a sophisticated HD user interface
FireMonkey Architecture
TFmxObject = class(TComponent) Create, destroy and release object Cloning, storing and loading object from a stream Child object manipulations (add, remove, search) Free notifications Abstraction layer for tab order Support for FireMonkey resources Support for FireMonkey animations
IControl
Handles Focus, Mouse and Keyboard events Implemented by TControl and TControl3D
FireMonkey Architecture
IRoot Interface for top-level containers Handles Focused, Captured, Active controls Implemented by TCustomForm
IScene
Container interface for 2D objects Implemented by TForm, TCustomLayer3D
IViewport3D
Container interface for 3D objects Implemented by TForm3D, TViewport3D
FireMonkey Styles
FireMonkey Stylebook Any object inherited from TBaseObject Set StyleName to identify Found using FindStyleResource method from parented object Stored In / Loaded From a stream file
FireMonkey Styles A collection of FireMonkey resource style WPF type of implementation Styles can be inherited, saved, loaded Look and Feel style files for Win7, MacOS, iOS and custom
themes
FireMonkey Animation
Used to modify property values over time
Machine speed independent
Can be looped and / or reversed
Can follow a variety of time / value curves
Can be triggered by MouseOver, Focus, Visibility, etc.
FireMonkey Effects / Filters
Can be applied to bitmaps
Can be applied to controls
Can be triggered by MouseOver, Focus, Visibility, etc.
GPU shader based implementation
3D Programming
One object model to target multiple platforms
FM uses right-handed orientation in 3D
Hardware acceleration
Windows DirectX
MacOS OpenGL
iOS OpenGL ES
FireMonkey and Cross Platform
FM is a platform that supports RTL GUI Database Operating System
Compile / Run on all platforms we support *
* subset for mobile platforms
Fire Monkey - Demos
Your first FireMonkey App
Windows
Mac OS X
HD / 3D
GPU/Shaders
Summary
FireMonkey - The Next Generation Business Application Platform
Fully harness the powerful GPU graphics hardware Rapidly build visually spectacular applications Invest in one platform and deploy to numerous OS-s Delphi and C++ compiled, native executable Fully programmable animations and effects
Your imagination is the only limit !!!
Go FIREMONKEY !!!
Live Bindings
Deep Dive
What is LiveBindings?
Provides a way for developers to create a
read/write link between components/objects and their data in the the application.
LiveBindings Overview
Supported by FireMonkey and VCL
Based on relational expressions, called binding expressions
Can be unidirectional or bidirectional
Can be used programmatically or visually
Is all about control objects and source object
LiveBinding Engine
Allow developers to create live binding in run-time between components/objects at design-time.
The LiveBinding visual components use the engine: TBindScope for bindings to components
TBindScopeDB for bindings to databases
TBindingsList for holding of binding lists
A number of conversion services in the box and allows to create new conversion service
Automatic updates
Expressions are automatically re-evaluated when a variable (e.g.; property) referenced by an expression has changed value.
Requires external notification
LiveBinding components
TBindScopeDB magic binding Bind data from DataSet to components
Link to DB Field wizard create the expressions to bind the data from DataSet to components
TBindScope non-dataset binding Bind data between components/objects
Support single object or collection of objects
TBindingsList Hold the binding lists
Manage the list of methods and output converters used by the expression
LiveBinding Scenario
CONTROL TLabel
SOURCE TField
LiveBinding Engine
Control Expression Text
Source Expression DisplayName
Binding Expression Editor
64-bit and VCL Styles
Deep Dive
Delphi 64-bit
Whats the same?
Integer, Longint, Cardinal still 32bits
Int64, UInt64 still 64bits
UnicodeString, AnsiString, WideString
Exceptions
Runtime Library (RTL)
SysUtils, Classes, etc
Delphi 32 and 64-bit Type Sizes Signed types Delphi/32 Delphi/64
ShortInt 1 byte
SmallInt 2 bytes
LongInt 4 bytes
Integer 4 bytes
Int64 8 bytes
Unsigned types Delphi/32 Delphi/64
Byte 1 byte
Word 2 bytes
LongWord 4 bytes
Cardinal 4 bytes
UInt64 8 bytes
Whats different?
NativeInt, NativeUint 64bits Pointer (all pointers) 64bits Dynamic Arrays 64bit indexing Floating point math - Double
Delphi 32 and 64-bit Type Sizes Signed types Delphi/32 Delphi/64
NativeInt 4 bytes 8 bytes
Unsigned types Delphi/32 Delphi/64
NativeUInt 4 bytes 8 bytes
Delphi 32 and 64-bit Pointer Types Pointer types Delphi/32 Delphi/64 Pointer String Class instance Class reference Interface AnsiString 4 bytes 8 bytes WideString UnicodeString Procedure pointer Dynamic array PAnsiChar PWideChar PChar
The CPU Programming model
Instructions and Addresses 64 bit address space
Limited by physical hardware
Same core Intel instruction set
New REX prefix for 64bit instructions
RIP-relative addressing
Jumps relative +/- 2GB
16 byte stack alignments
Online resources
http://msdn.microsoft.com/en-us/magazine/cc300794.aspx
http://msdn.microsoft.com/en-us/library/7kcdt6fy.aspx
What does this mean for Delphi?
Dont panic!
Delphi 64-bit on Windows
Same Windows API
CreateWindowEx, PeekMessage, etc..
Same Delphi RTL
SysUtils, Classes, Generics.Collections, etc
Same VCL
Forms, Graphics, Controls, Menus, etc..
Category Identifier dcc32 dcc64
Compiler DCC defined defined VER230 defined defined
Platform MSWINDOWS defined defined WIN32 defined not defined WIN64 not defined defined
CPU CPU386 defined not defined CPUX86 defined not defined
CPUX64 not defined defined
Availability ASSEMBLER defined defined UNICODE defined defined
Pre-Defined Conditionals
Delphi 64-bit on Windows some gotchas SizeOf(Pointer) SizeOf(Integer)
IntegerPointer casts will break in 64bit
SizeOf(THandle) = SizeOf(Pointer)
All Handles = SizeOf(Pointer) (HWND, HDC, etc..).
All code in process must be 64bit
Must have 64bit versions of external non-Delphi libraries (DLLs)
One, and only one, calling convention
register, pascal, cdecl, stdcall are ignored.
safecall is still special
Old pointer math code may break
Works in 32 and 64bit: MyPtr := PByte(P) + 10;
TLists internal FList is now a TPointerList. Used to be a PPointerList. Removing ^ should be sufficient to port from 32-bit to 64-bit.
Tag property is now a NativeInt (32-bit vs 64-bit)
Delphi 64-bit on Windows some gotchas Inline Assembly
Cannot mix asm blocks with Pascal code
Only procedural level asm blocks supported
Stack must be 16-byte aligned at each call instruction
Define locals for temp storage
Do not modify the RSP stack pointer
New unified calling convention. First 4 parameters in registers, RCX, RDX, R8, R9 (or XMM0-XMM3)
Exception unwinding
No change for pure Delphi code. Exceptions function identically.
Inline Assembly can cause exception unwinding to fail if not properly written.
SHL/SHR 32-bit values (Integer et al) will only shift in 32-bit space. 64-bit values will of course shift in 64-bit space.
No Extended type in 64-bit. Use TExtendedRec80 if necessary (binary files with Extendeds in them for instance)
Windows API gotchas SetWindowLong / GetWindowLong should
be replaced by SetWindowLongPtr / GetWindowLongPtr for GWLP_HINSTANCE, GWLP_WNDPROC, etc as they return pointers and handles. Pointers passed to SetWindowLongPtr should
be type-casted to LONG_PTR and not to Integer / Longint.
SetWindowLong mapped to SetWindowLongPtr in Windows.pas. Calls to our declaration of SetWindowLong are
safe, as long as they are cast correctly.
Windows API gotchas (cont) Use explicit casts to WPARAM and LPARAM
where appropriate. Example: Passing pointers through
SendMessage SendMessage(hWnd, WM_SETTEXT, 0, LPARAM(@MyCharArray));
Use LRESULT to cast message results Example: Message.Result := LRESULT(Self);
Message cracker records (TWMxxx) changed Alignment changes and field-size changes
What can I do today? Find all IntegerPointer casts, including
Integerinstance casts. Check for Pointer size assumptions
Ensure external dependencies are also 64bit Image/bitmap libraries Hardware interfaces libraries ActiveX controls
Consider rewriting Assembler in pure-Pascal Better future portability (think ARM CPUs) Rely more on algorithmic performance rather
than raw assembly performance.
Make sure you know what bit-size (32 vs 64) youre shifting with SHL/SHR.
VCL
Whats New in the VCL?
64-bit
VCL Styles
VCL Styles
Themes in Delphi/C++Builder XE and earlier
Only 1 "theme" supported (native Windows)
3rd party products required to change look of VCL apps
Current skinning" products for Windows common controls Requiring hooking WndProc's
Intercepting control messages
Separate controls needed for "custom" controls TCustomControl / TGraphicControl descendants
VCL Styles
Multiple styles provided/supported
Custom style file creation
Custom style classes
Pluggable style engine
Works with TWinControl and TGraphicControl descendants
VCL Styles TThemeServices replaced by TCustomStyleServices
Extends TThemeServices with more parts, states and methods
TStyleEngine
Processes control messages
Calls StyleServices to render parts
TStyleManager
Provides services such as
LoadFromFile
LoadFromResource
RegisterStyle
RegisterStyleClass - Associates file extension with Style class
SetStyle
Style selection
Style engine selection
Providing custom styles
Create style file (using provided style building tool)
Implement TCustomStyleServices descendant and render parts directly
What cant be styled?
TMainMenu/TPopupMenu (main menu bar is styled, but not the pop-up parts)
Ribbon controls
OS dialogs
Project Options | Appearance
From this
To this!
VCL Style Designer
Typical Usage
Uses Vcl.Styles, Vcl.Themes;
TStyleManager.SetStyle(Ruby Red Graphite);
RTL
RTL
Whats new in the RTL?
64-bit for Windows!!! MacOSX - No COM, No ActiveX. :)
Windows specifics has been mapped to MacOSX equivalents wherever possible
TOSVersion Architecture (32/64-bit), Platform (Win/Mac), Major, minor OS version, Service Pack info
TFormatSettings replaces global format setting variables (that don't exist on MacOSX)
TZipFile - cross platform Zip support SymLinks in IOUtils and SysUtils file handling routines
class function TFile.CreateSymLink(const Link, Target: string): Boolean; TLoginCredentialService
Extensible framework agnostic login credential services with support for callbacks (success, failure, etc)
TPoint, TRect, TSize - new methods and properties TPointF, TRectF, TSizeF - floating point versions
TFormatSettings (SysUtils)
type TFormatSettings = record // System.SysUtils CurrencyString: string; CurrencyFormat: Byte; CurrencyDecimals: Byte; DateSeparator: Char; TimeSeparator: Char; ListSeparator: Char; ShortDateFormat: string; LongDateFormat: string; TimeAMString: string; TimePMString: string; ShortTimeFormat: string; LongTimeFormat: string; ShortMonthNames: array[1..12] of string; LongMonthNames: array[1..12] of string; ShortDayNames: array[1..7] of string; LongDayNames: array[1..7] of string; ThousandSeparator: Char; DecimalSeparator: Char; TwoDigitYearCenturyWindow: Word; end;
TZipFile (System.Zip)
type
TZipFile = class
..
public
procedure Open(ZipFileName: string; OpenMode: TZipMode); overload;
procedure Open(ZipFileStream: TStream; OpenMode: TZipMode); overload;
procedure Close;
procedure Extract(FileName: string; Path: string = ''; CreateSubdirs: Boolean=True); overload;
procedure Extract(Index: Integer; Path: string = ''; CreateSubdirs: Boolean=True); overload;
procedure ExtractAll(Path: string = '');
procedure Read(Index: Integer; out Bytes: TBytes); overload;
procedure Read(FileName: string; out Stream: TStream); overload;
procedure Read(Index: Integer; out Stream: TStream); overload;
procedure Add(FileName: string; ArchiveFileName: string = '';
Compression: TZipCompression = zcDeflate); overload;
property FileCount: Integer read GetFileCount;
property FileNames: TArray read GetFileNames;
end;
TLoginCredentialService
type
TLoginCredentialService = class sealed
public const
Default = '';
DefaultUsrPw = 'DefaultUsrPw'; // do not localize
DefaultUsrPwDm = 'DefaultUsrPwDm'; //do not localize
strict private class var
FLoginHandlers: TStringList;
strict private
class constructor Create;
class destructor Destroy;
class function IndexOfHandler(const Context: TLoginCredentialEvent): Integer;
public
class procedure RegisterLoginHandler(const Context: string; const HandlerEvent: TLoginCredentialEvent); static;
class procedure UnregisterLoginHandler(const Context: string; const HandlerEvent: TLoginCredentialEvent); static;
class function GetLoginCredentialEvent(const Context: string): TLoginCredentialEvent; static;
class function GetLoginCredentials(const Context: string; Sender: TObject; const Callback: TLoginEvent): Boolean; overload; static;
class function GetLoginCredentials(const Context: string; const Callback: TLoginFunc): Boolean; overload; static;
class function GetLoginCredentials(const Context: string; var Username, Password: string): Boolean; overload; static;
class function GetLoginCredentials(const Context: string; var Username, Password, Domain: string): Boolean; overload; static;
end;
TPointF (System.Types)
type TPointF = record X: Single; Y: Single; public constructor Create(const P: TPointF); overload; constructor Create(const X, Y: Single); overload; constructor Create(P: TPoint); overload; class operator Equal(const Lhs, Rhs: TPointF): Boolean; class operator NotEqual(const Lhs, Rhs: TPointF): Boolean; class operator Add(const Lhs, Rhs: TPointF): TPointF; class operator Subtract(const Lhs, Rhs: TPointF): TPointF; function Distance(const P2: TPointF): Double; procedure SetLocation(const X, Y: Single); overload; procedure SetLocation(const P: TPointF); overload; procedure SetLocation(const P: TPoint); overload; function Add(const Point: TPointF): TPointF; overload; function Add(const Point: TPoint): TPointF; overload; function Subtract(const Point: TPointF): TPointF; overload; function Subtract(const Point: TPoint): TPointF; overload; function IsZero: Boolean; function Ceiling: TPoint; function Truncate: TPoint; function Round: TPoint; end;
C++
Whats New in C++?
FireMonkey
Live Bindings
DataSnap
Extended RTTI
Audits and Metrics
Demos
Demos
32-bit/64-bit Stylish Fish Facts
C++ Stylish Fish Facts
Stylish Live Bindings Fish Facts
DataSnap and Cloud
Deep Dive
Agenda
RAD Cloud Overview
DBExpress
New Cloud API
Whats new in DataSnap
Cloud API
What is the Cloud API?
Delphi API for accessing cloud application services from Amazon and Microsoft Azure.
Cloud API service support
Storage Azure Blobs Service Amazon S3
Table Azure Table Service SimpleDB
Queue Azure Queue Service Amazon SQS
Name conventions
Amazon and Microsoft use different names for the same things
Container = Bucket
Blobs = Object
Page = Multipart
ACL = ACL (Access Control List)
Microsoft Azure
Blob Storage Unstructured storage Defined Container For storing large pieces of data such as: Images, Video,
Documents, etc.
Azure Tables Scalable structured storage NOSQL type tables Entities stored in a table Different set of properties made up of different types
Queues Persistent asynchronous messaging Each message is up to 8kb long
Amazon WS
Simple Storage Service (S3) Blob Storage Unstructured storage Defined Container For storing large pieces of data such as: Images, Video, Documents,
etc.
SimpleDB - Tables Scalable structured storage NOSQL type tables Entities stored in a table Different set of properties made up of different types
Simple Queue Service (SQS) Persistent asynchronous messaging Each message is up to 64kb long
Deploying to the Cloud
Deployment manager supports:
Microsoft Azure
Amazon EC2
What's new in DataSnap
Whats new in DataSnap
Enhancements
Server
REST Interfaces
Callback
Authentication Manager
New DataSnap Monitoring and Control
Server
Proxy info support for DataSnap HTTP connections in TSQLConnection and TDSRESTConnection
New TDBXChannelInfo.DBXClientInfo (TDBXClientInfo record) provides:
IP Address
Protocol
Application Name (when possible) only for HTTP
HTTPS Support
For Stand-alone DataSnap servers
For Stand-alone WebBroker servers
DataSnap Wizards updated with HTTPS support
Session Manager
Session support for TCP/IP protocol
Support for store and retrieve TObject in Sessions
Sessions created and destroyed with the TCP/IP protocol now notifies the AddSessionEvent and RemoveSessionEvent
Support for multiple Callback Tunnels on DataSnap REST Interface
Callback Tunnel Manager
TDSCallbackTunnelManager class in DSServer unit
Allows tracking when:
Callback is added or removed
Tunnel is created or closed
Callbacks
Heavyweight callbacks now support broadcasting to specific callbacks
GetAllChannelNames added to the DSServer to get the name of all callback channels
Callback client side events
Notifications whenever the managers tunnel is opened or closed, or when callbacks are added to it or removed from it. Available for:
Delphi DBX Client Events
Delphi REST Client Events
JavaScript REST Client Events
Delphi DBX Client Events
TDSClientCallbackChannelManager component, event OnChannelStateChange
Method signature: (Sender: TObject; const EventItem: TDSClientChannelEventItem);
TunnelClosedByServer event type for connections closed by the server or connection loss.
Delphi REST Client Events
TDSRestClientChannel component, event OnChannelStateChange
Method signature: (Sender: TObject; const EventItem: TDSRESTChannelEventItem);
ChannelClosedByServer event type for abrupt connection loss with the server
JavaScript Client Events
Set an event function to be invoked when changes happen to the channel or one of its callbacks
var channel = new ClientChannel (clientID, channelName);
channel.onChannelStateChange = HandleChannelEvent;
If the server gracefully closes the channel, then the client gets an event type of ClientChannel .EVENT_CHANNEL_STOP
If the connection is abruptly lost, client will get an event type of ClientChannel. EVENT_SERVER_DISCONNECT.
JavaScript session Support
initSessionData function (in serverFunctionExecutor.js) now optionally takes a second parameter.
The parameter will be prefixed to the general cookie ID (dssessionid).
Allows you to have complete control over which application uses which session ID/cookie.
JSON results and REST calls
OnResult event has been added to the TDSHTTPWebDispatcher and TDSHTTPService components
Allow to change the JSON result format in REST calls.
Method signature:
(Sender: TObject; var ResultVal: TJSONValue; const Command: TDBXCommand; var Handled:
Boolean);
Query parameters in REST calls
GetInvocationMetadata().QueryParams
Returns a TStrings which holds a key value pairs for all of the query parameters passed in through the URL of the REST call
DataSnap Monitoring and Control
DataSnap Monitoring and Control
DataSnap servers in XE2 are able to easily monitor connections, and close any TCP
connection they wish.
What you can do
Take control over the client connections
Monitor client requests
Limit the number of requests per connection
Improve Security
More
How it works?
TDSTCPServerTransport components has two new events:
onConnect
onDisconnect
Connections are linked with a Session ID
Listening to TCP/IP events
Detecting Graceless Disconnects
By default, the OnDisconnect event will not be notified if the client abruptly loses his internet connection
This behavior depends on OS configuration
Use TDSTCPChannel methods to control this behavior for each connection:
EnableKeepAlive
DisableKeepAlive
How to use EnableKeepAlive
If the connection is idle for 10 seconds, then send a keep-alive packet to check if the client is still there.
Event.Channel.EnableKeepAlive(10000);
How to use EnableKeepAlive
If the client doesnt respond the OS will resend the packet X number of times (Win 7 will retry 10 times).
You can specify the number of milliseconds to wait between retries if a client doesn't respond to a packet.
Event.Channel.EnableKeepAlive(10000, 100);
KeepAlive Enablement
Available through TDSTCPServerTransport component
Three new published properties
KeepAliveEnablement - (Set: Default, Enabled, Disabled)
KeepAliveTime - Integer Milliseconds value
KeepAliveInterval - Integer Milliseconds value
How to use DisableKeepAlive
Get the associated Channel for the given connection and call:
DisableKeepAlive;
Closing Client Connections
Connection can be closed any time
Channel provide the connection instance
//Get the associated Channel for the given connection, and if successful close it
if FConnections.TryGetValue(Connection, Channel) then
Channel.Close;
Demo
Tracking all the TCP/IP connections and their corresponding sessions
How to manually close a TCP/IP connection from the server
How to detect when a client has lost internet connectivity while connected.
Mobile and Connectors
Deep Dive
Mobile Connectors for DataSnap
DataSnap Mobile Connectors
iOS Objective C
Android Java
BlackBerry Java
Windows Phone 7 C#, Prism
DataSnap Mobile Connectors Demonstration
RadPHP XE2 Mobile App
RadPHP XE2 Phone Gap
Tools | Wizard for PhoneGap
Summary
FireMonkey - The Next Generation Business Application Platform
Fully harness the powerful GPU graphics hardware Rapidly build visually spectacular applications Invest in one platform and deploy to numerous OS-s Delphi and C++ compiled, native executable Fully programmable animations and effects
Your imagination is the only limit !!!
Go FIREMONKEY !!!
RAD Studio XE2
Deliver Fast Native Applications on Windows, Mac, Web and Mobile
Speed Up Your Development Process with RAD
Create Visually Stunning and Interactive Business Applications
Build Applications that Connect Everywhere
Break Free from Grids Visualize Live Data
The ultimate application development suite for Windows, Mac, mobile and Web