How to Develop Distributed Applications using .NET Remoting

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Develop Distributed Applications using .NET
Remoting
Loke Uei Developer Evangelist Microsoft Malaysia
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What we will cover

• Introduction to .NET Remoting
• Not Exhaustive
• DCOM vs. Remoting
• Configuring .NET Remote Applications
• Hosting .NET Remote Applications

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Session Prerequisites

• Experience With the Following
• .NET Framework
• Visual C, VB .NET, or C
• Web Services
• Distributed Computing Concepts

Level 200
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So Why This Presentation?

• You know DCOMs a pain if
• You've ever wanted to control the channel or
  format, or anything else about the DCOM messages.
• You've ever wanted to trace or log DCOM messages.
• You've wanted to easily use DCOM over the
  internet with a variety of clients.
• Youve ever wanted to quickly change
  configuration settings such as ports and channels.

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Agenda

• Architecture and Terminology
• Web Services/DCOM Comparison
• Server Activated Objects (SAO)
• Client Activated Objects (CAO)
• Configuration
• Hosting

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Architecture and TerminologyInto to Remoting

• Communication between Application Domains
• Usually Between Servers
• Protect IP / Source Code
• Replacement for DCOM
• Low Level Control

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Architecture and Terminology Remoting Terminology

• Application Domains
• Channels
• Formatters (SOAP / Binary)
• Server Activated Objects (Wellknown)
• Client Activated Objects

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Architecture and Terminology Application Domains

• Process Boundary
• Provides Isolation
• Provides Protection
• Security

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Architecture and Terminology Channels

• Transport Data
• Two Default Formats- http// or tcp//
• Http// - good for firewalls
• Tcp// - high speed, binary
• Port Agnostic
• Create Your Own

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Architecture and Terminology Formatters

• Turn Message Into Stream
• Binary
• Soap 1.1 Compliant

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Architecture and Terminology .NET to Non-.NET

• SOAP 1.1 Specification
• Http//
• Simple Datatypes
• int
• float
• string

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Architecture and Terminology.NET to .NET

• Rich Functionality
• Almost any CLS Object
• DataSets
• Hashtables
• Custom Objects
• Binary
• Fast

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Demonstration 1 Simple Demo Concepts
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Agenda

• Architecture and Terminology
• Web Services/DCOM Comparison
• Server Activated Objects (SAO)
• Client Activated Objects (CAO)
• Configuration
• Hosting

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Web Services/DCOM Web Services

• Remoting

• Web Services

• Any Application
• IIS
• WinForm
• Windows Service
• Console Application
• Multiple Protocols
• Http//
• Tcp//
• Custom
• Binary or Soap

• Only IIS
• Only Http//
• WSDL

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Web Services/DCOM DCOM

• Remoting

• DCOM

• Choose Protocol
• Create Protocol
• Firewall Friendly
• Custom Ports
• Define Protcol
• Tighter Security
• Custom
• IIS
• NT

• RPC Protocol
• Not Firewall Friendly
• Pings for Lifetime

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Agenda

• Architecture and Terminology
• Web Services/DCOM Comparison
• Server Activated Objects (SAO)
• Client Activated Objects (CAO)
• Configuration
• Hosting

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Server Activated ObjectsServer Activated Objects

• Well-known
• SingleCall
• Singleton
• Marshaling
• Configuration

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Server Activated ObjectsWell-Known

• Client Must Know The Endpoint (URI)
• Server Controls Object
• ltwellknowngt
• RegisterWellKnownServiceType()

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Server Activated ObjectsSingleCall

• Object Created On Each Call
• One Instance Per Client Request
• No State
• Server Farm Friendly
• ltwellknown ModeSingleCall/gt

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Server Activated ObjectsSingleton

• One Object On Server
• Has Lifetime
• Default 5 Minutes
• Can Override
• Shared Between Multiple Clients

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Server Activated ObjectsMarshaling

• Marshall by Value
• Object Serialized
• Attribute Serializable
• Implement ISerializable
• Marshall by Reference
• Inherit System.MarshalByRefObject
• Proxy Class

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Server Activated ObjectsServer Configuration

• Config file
• ltwellknown
• modeSingleCall or Singleton
• typetype,assembly
• objectUrimyobject /gt
• Programmatic
• Create Wellknown Type
• Register

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Demonstration 2Server Activated Objects
SinglecallSingletonUtilizing State
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Agenda

• Architecture and Terminology
• Web Services/DCOM Comparison
• Server Activated Objects (SAO)
• Client Activated Objects (CAO)
• Configuration
• Hosting

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Client Activated Objects Client Activated Object
(CAO)

• Created by Calling Client
• Client Controls Lifetime
• Lease
• State For Individual Client
• Tracking Services

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Client Activated Objects Client Activation

• New()
• File Configuration
• ltactivated /gt
• Activator.CreateInstance()
• Overloaded
• Pass In Url, Assembly Attributes

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Client Activated Objects Configuration
Properties

• Config file
• ltactivated
• type"type,assembly" /gt
• Programmatic
• UrlAttribute
• Activator.CreateInstance

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Client Activated Objects Lease

• In DCOM Ping
• High Overhead
• Not Suited for Internet
• Lease-based Mechanism
• Set Default Lifetime (min, sec, etc..)
• Sponsors Renew

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Client Activated Objects Properties

• Lease Time
• Default 5 Minutes
• Set 0 to Infinite
• Sponsors
• Listens from Server Application
• GetLifeTimeService()
• Renewal()

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Client Activated Objects Tracking

• Implement ITrackingHandler
• DisconnectedObject ()
• MarshaledObject ()
• UnmarshaledObject ()
• RegisterTrackingHandler( ITrackingHandler)

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Demonstration 3CAO DemoCAO DemoLease
DemoMaintain StateTracking Remote Actions
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Agenda

• Architecture and Terminology
• Web Services/DCOM Comparison
• Server Activated Objects (SAO)
• Client Activated Objects (CAO)
• Configuration
• Hosting

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Configuration File Configuration

• XML
• Easy To Read
• Easy To Modify
• Simple To Code
• No Need to Recompile

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Configuration File Format

• ltconfigurationgt
• ltSystem.Runtime.Remotinggt
• ltapplicationgt
• lt/applicationgt
• lt/System.Runtime.Remotinggt
• lt/configurationgt

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Configuration File - Well-known Objects

• ltservicegt
• ltwellknown
• typeNamespace.Class, Assembly
  objectUriData modeSingleton /gt
• lt/servicegt

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Configuration File - Client Activiated Objects

• ltservicegt
• ltactivated typeNamespace.Class, Assembly /gt
• lt/servicegt

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Configuration RemotingConfiguration Class

• RemotingConfiguration.Configure(configuration
  file)
• Method works for server and client configuration

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Configuration Programmatic Configuration

• Hide Property Information
• Required Recompile
• Dynamic
• Easy To Deploy

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Configuration Programmatic Configuration

• Create Channel
• Register Channel
• Create Remote Object
• Register Object with Remoting Configuration

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Configuration Programmatic Configuration -
Server

• ChannelServices.RegisterChannel(new
  HttpChannel(8080))
• RemotingConfiguration.ApplicationName "Data"
• RemotingConfiguration.RegisterWellKnownServiceType
  (typeof(RemoteObject.DataAccess), "Data",
  WellKnownObjectMode.SingleCall)

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Configuration Programmatic Configuration -
Client

• ChannelServices.RegisterChannel(new
  TcpServerChannel( 6789 ) )
• ActivatedServiceTypeEntry obj new
  ActivatedServiceTypeEntry( "RemoteObject.DataAcces
  s", "RemoteObject")
• RemotingConfiguration.RegisterActivatedServiceType
  ( obj )

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Demonstration 4Configuration Programmatic -
Client Programmatic - Server
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Agenda

• Architecture and Terminology
• Web Services/DCOM Comparison
• Server Activated Objects (SAO)
• Client Activated Objects (CAO)
• Configuration
• Hosting

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Hosting Hosting Options

• Console Applications
• Windows Forms Applications
• IIS
• Windows NT Service

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Hosting IIS and Windows Services

• IIS
• Built In
• Security
• Stable
• Windows Service
• Roll Your Own
• More Flexible

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Hosting IIS Configuration

• Use Configuration File Web.Config
• Remote Object - /bin Directory
• Place in Global Assembly Cache (Gacutil.exe)
• Must Use HttpChannel
• Can Use Binary Formatter
• Object URI ends in .rem or .soap

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Hosting Windows Service

• Project Built Into Visual Studio .NET
• Services.msc MMC Snap-in
• Any Channel Format
• HttpChannel
• TcpChannel
• Configuration
• Programmatic
• File

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Demonstration 5Hosting Demo Windows Service
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Session Summary

• Architecture and Terminology
• Web Services/DCOM Comparison
• Server Activated Objects (SAO)
• Client Activated Objects (CAO)
• Configuration
• Hosting

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For More Information

• MSDN Web site at
• msdn.microsoft.com
• Got Dot Net
• www.gotdotnet.com
• ASP .NET
• www.asp.net

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For More Information

• Dot Net Remoting
• www.dotnetremoting.cc
• ASP .NET Directory
• www.123aspx.com

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