CTS301 Connected SystemsManaged Programming For Win32 Developers

CTS301 Connected SystemsManaged Programming For Win32 Developers

David S. PlattDavid S. PlattSupreme and Exalted Supreme and Exalted Dictator-for-LifeDictator-for-LifeRolling Thunder ComputingRolling Thunder Computing

Mon 10:45Mon 10:45 CTS200  Service Orientation and the Windows/.NET DeveloperCTS200  Service Orientation and the Windows/.NET Developer

Mon 1:30Mon 1:30 CTS300 Prescriptive Guidance-Juggling Web Services, WSE, .NET Remoting, CTS300 Prescriptive Guidance-Juggling Web Services, WSE, .NET Remoting, System.EnterpriseServices, and MSMQSystem.EnterpriseServices, and MSMQ

Mon 3:15Mon 3:15 CTS308  Applied Web Services in Hewlett Packard's Core eCommerce SolutionsCTS308  Applied Web Services in Hewlett Packard's Core eCommerce Solutions

Mon 5:00Mon 5:00 CTS404  Best Practices for Dealing With State at Multiple Layers Within YourCTS404  Best Practices for Dealing With State at Multiple Layers Within Your .NET Applications .NET Applications

Tue 1:30Tue 1:30 DEVC27  Service Orientation OverviewDEVC27  Service Orientation Overview

Tue 3:15 CTS301  Managed Programming for Win32 Developers

Wed 2:00Wed 2:00 CTS302  Using Web Services Enhancements v2.0 (WSE) to Secure Web ServicesCTS302  Using Web Services Enhancements v2.0 (WSE) to Secure Web Services

Wed 10:15Wed 10:15 CTS400  Using Web Services Enhancements v2.0 for Messaging Over Multiple Machines CTS400  Using Web Services Enhancements v2.0 for Messaging Over Multiple Machines and Networksand Networks

Wed 5:30Wed 5:30 CTS303  Applied Web Services at the Ohio State University Medical CenterCTS303  Applied Web Services at the Ohio State University Medical Center

Thur 8:30Thur 8:30 CTS403  Handling Errors with TransactionsCTS403  Handling Errors with Transactions

Thur 8:30Thur 8:30 DEVC35  Web Services InteroperabilityDEVC35  Web Services Interoperability

Thur 1:30Thur 1:30 CTS406  Versioning of Connected .NET ApplicationsCTS406  Versioning of Connected .NET Applications

Thur 1:30Thur 1:30 DEVC16 Distributed Applications Performance PanelDEVC16 Distributed Applications Performance Panel

Thur 5:00Thur 5:00 CTS304 Availability and Reliability - Failure Is Not An OptionCTS304 Availability and Reliability - Failure Is Not An Option

Fri 10:45Fri 10:45 CTS405  Choosing a Hosting Model - Dealing with Threads, Application Domains, CTS405  Choosing a Hosting Model - Dealing with Threads, Application Domains, and Processesand Processes

Fri 1:00Fri 1:00 CTS306  Deployment and ManagementCTS306  Deployment and Management

Fri 2:45Fri 2:45 CTS307  Using Service Orientation to Drive Business ProcessesCTS307  Using Service Orientation to Drive Business Processes

Fri 9:00Fri 9:00 DEVC40  Versioning PanelDEVC40  Versioning Panel

Connected Systems TrackConnected Systems Track

Why Managed Code? Why Managed Code?

Better Applications, SoonerBetter Applications, Sooner

BetterBetter

Type checking and verificationType checking and verification

Garbage collectionGarbage collection

Exception handlingException handling

Code-access securityCode-access security

SoonerSooner

InheritanceInheritance

PrefabricationPrefabrication

Larger component marketplaceLarger component marketplace

Other OO featuresOther OO features

AgendaAgenda

Microsoft-SpecificMicrosoft-SpecificCOM InteropCOM Interop

COM+COM+

MSMQMSMQ

RemotingRemoting

Platform IndependentPlatform IndependentWinsockWinsock

HTTP and FTPHTTP and FTP

Web ServicesWeb Services

COM InteropCOM Interop

You can use COM objects from .NET by You can use COM objects from .NET by using a runtime-callable wrapper, thus:using a runtime-callable wrapper, thus:

.NET client.NET client COM objectCOM objectRuntimeRuntimecallablecallablewrapperwrapper

IUnkown, IDispspatch, IFoo interfacesIUnkown, IDispspatch, IFoo interfaces

COM InteropCOM Interop

AdvantagesAdvantages

1.1. Can write managed code and still use Can write managed code and still use legacy components if neededlegacy components if needed

COM InteropCOM Interop

CaveatsCaveats1.1. COM objects often leak in places COM objects often leak in places

the .NET garbage collector doesn’t the .NET garbage collector doesn’t clean up.clean up.

Consider rewriting leaky components in Consider rewriting leaky components in managed codemanaged code

try out-of-proc objects using COM+ try out-of-proc objects using COM+ process recycling feature in W2k3 SV process recycling feature in W2k3 SV

COM InteropCOM Interop

CaveatsCaveats2.2. Managed – unmanaged transition Managed – unmanaged transition

slower than pure managed – buy CPU slower than pure managed – buy CPU cycles with cashcycles with cash

3.3. Requires UnmanagedCode permissionRequires UnmanagedCode permission

To Explore COM Interop FurtherTo Explore COM Interop Further

““.NET Interop: Get Ready for Microsoft .NET Interop: Get Ready for Microsoft .NET by Using Wrappers to Interact .NET by Using Wrappers to Interact with COM-based Applications,” with COM-based Applications,” by David S. Platt, MSDN Magazine, by David S. Platt, MSDN Magazine, August 2001 August 2001

Online at: Online at: http://msdn.microsoft.com/msdnmag/ishttp://msdn.microsoft.com/msdnmag/issues/01/08/interop/default.aspxsues/01/08/interop/default.aspx

Enterprise Services/COM+Enterprise Services/COM+

COM+ provides useful runtime services to COM+ provides useful runtime services to COM object designers such as COM object designers such as

TransactionsTransactions

Object PoolingObject Pooling

SynchronizationSynchronization

JIT ActivationJIT Activation

Role-Based SecurityRole-Based Security

These are available to managed objects via These are available to managed objects via System.EnterpriseServicesSystem.EnterpriseServices

Enterprise Services/COM+Enterprise Services/COM+

Easy to useEasy to use

Derive from Serviced ComponentDerive from Serviced Component

Specify service usage statically via Specify service usage statically via attributes or dynamically via attributes or dynamically via programming modelprogramming model

Vote on transaction with ContextUtil or Vote on transaction with ContextUtil or auto-completeauto-complete

Managed Code TransactionManaged Code TransactionManaged Code TransactionManaged Code Transaction

Enterprise Services/COM+Enterprise Services/COM+

Performance Performance

In real-life scenarios, method call In real-life scenarios, method call performance is equal to unmanaged performance is equal to unmanaged

Understand what COM+ is doing under Understand what COM+ is doing under the hood – most performance the hood – most performance problems come from failing to do this problems come from failing to do this

See Rich Turner’s white paper at end of See Rich Turner’s white paper at end of

this sectionthis section

Enterprise Services/COM+Enterprise Services/COM+

AdvantagesAdvantages1.1. Easier programming of services Easier programming of services

you needyou need

2.2. Method call code is fastMethod call code is fast

3.3. Migration path to “Indigo”Migration path to “Indigo”

Enterprise Services/COM+Enterprise Services/COM+

CaveatsCaveats1.1. Object creation and destruction are Object creation and destruction are

somewhat slower – use JITA and somewhat slower – use JITA and pooling (should do that anyway) pooling (should do that anyway)

2.2. Be chunky Be chunky

3.3. Avoid STA Avoid STA

4.4. Learn underlying COM+ Learn underlying COM+

5.5. Avoid finalizers Avoid finalizers

To Explore Enterprise Services/COM+ FurtherTo Explore Enterprise Services/COM+ Further

““COM+ Integration: How .NET COM+ Integration: How .NET Enterprise Services Can Help You Enterprise Services Can Help You Build Distributed Applications” Build Distributed Applications” by Tim Ewald, MSDN magazine,by Tim Ewald, MSDN magazine,October 2001October 2001

Online at: Online at: http://msdn.microsoft.com/msdnmag/ishttp://msdn.microsoft.com/msdnmag/issues/01/10/complus/sues/01/10/complus/

To Explore Enterprise Services/COM+ FurtherTo Explore Enterprise Services/COM+ Further

““.NET Enterprise Services .NET Enterprise Services Performance”, by Turner, Buerk, Performance”, by Turner, Buerk, and Driver and Driver

Online at: Online at: http://http://msdn.microsoft.com/library/default.aspmsdn.microsoft.com/library/default.asp?url?url=/library/en-us/dncomser/html/entsvcp=/library/en-us/dncomser/html/entsvcperf.asperf.asp

COM and .NET Component Services by COM and .NET Component Services by Juval Lowy, O’Reilly Press Juval Lowy, O’Reilly Press ISBN 0596001037ISBN 0596001037

MSMQ/Messaging ServicesMSMQ/Messaging Services

Store-and-forward messaging service Store-and-forward messaging service for decoupled operationfor decoupled operation

Requires different design thinking; Requires different design thinking;

For example, you can’t depend on the For example, you can’t depend on the order in which messages are order in which messages are processed. Responses come processed. Responses come asynchronously, sometimes not at allasynchronously, sometimes not at all

MSMQ/Messaging ServicesMSMQ/Messaging Services

Managed apps access MSMQ via the Managed apps access MSMQ via the System.Messaging namespaceSystem.Messaging namespace

Implemented as a wrapper over MSMQ Implemented as a wrapper over MSMQ via P/Invokevia P/Invoke

Need to choose data-coupled versus Need to choose data-coupled versus code-coupled operationcode-coupled operation

System.MessagingSystem.MessagingSystem.MessagingSystem.Messaging

MSMQ/Messaging ServicesMSMQ/Messaging Services

AdvantagesAdvantages1.1. Easy sending and receiving of Easy sending and receiving of

most .NET objectsmost .NET objects

2.2. Fairly easy tweaking of most Fairly easy tweaking of most of remainderof remainder

MSMQ/Messaging ServicesMSMQ/Messaging Services

CaveatsCaveats

1.1. Message body is limited to 4 MBMessage body is limited to 4 MB

2.2. Coarsely-grained code access security Coarsely-grained code access security capabilities; Full trust is required to use capabilities; Full trust is required to use System.Messaging at all; There are no System.Messaging at all; There are no subset permissions subset permissions

3.3. Lacks a few seldom-used features of Lacks a few seldom-used features of MSMQ’s COM libraries, such as direct MSMQ’s COM libraries, such as direct access to SOAP envelope; You can get access to SOAP envelope; You can get these by importing the COM libraries these by importing the COM libraries through .NET’s COM interop featurethrough .NET’s COM interop feature

To Explore MSMQ/Messaging Services FurtherTo Explore MSMQ/Messaging Services Further

““Send MSMQ Messages Securely Send MSMQ Messages Securely Across the Internet with HTTP and Across the Internet with HTTP and SOAP”, by David S. Platt,SOAP”, by David S. Platt,MSDN Magazine, December 2003 MSDN Magazine, December 2003

Online at: Online at: http://msdn.microsoft.com/msdnmag/ishttp://msdn.microsoft.com/msdnmag/issues/03/12/MSMQandNET/sues/03/12/MSMQandNET/

.NET Remoting.NET Remoting

Looks and feels similar to DCOMLooks and feels similar to DCOM

ClientClient ServerServer

StubStubProxyProxy ObjectObjectChannelChannel

4.4. Call transmitted Call transmitted through channel through channel to stubto stub

5.5. Call made locally Call made locally to objectto object

3.3. Client makes calls Client makes calls on local proxyon local proxy

1.1. Client makes call Client makes call creating object creating object on serveron server

2.2. Object created on Object created on server; Proxy, server; Proxy, stub, and channel stub, and channel set upset up

.NET Remoting.NET Remoting

Important differences from DCOMImportant differences from DCOMUses .NET FrameworkUses .NET Framework

No unmanaged versionNo unmanaged version

Client can’t launch host applicationClient can’t launch host application

Object lifetime managed by leasing Object lifetime managed by leasing instead of reference countinginstead of reference counting

.NET Remoting.NET Remoting

More topological options than More topological options than Web ServicesWeb Services

Stateless, stateful, or singleton objectsStateless, stateful, or singleton objects

TCP, HTTP or custom transportsTCP, HTTP or custom transports

Binary, SOAP, or custom formattersBinary, SOAP, or custom formatters

.NET Remoting.NET Remoting

Microsoft recommends it forMicrosoft recommends it forCalling between different application Calling between different application domains inside the same process domains inside the same process

Handling custom wire protocols Handling custom wire protocols and formats and formats

.NET Remoting.NET Remoting.NET Remoting.NET Remoting

.NET Remoting.NET Remoting

Rich Turner’s blog says:Rich Turner’s blog says:

““No! Nope! Niet! Non! Negative! Nuh-huh! No! Nope! Niet! Non! Negative! Nuh-huh! [shake head vigorously]!!!”[shake head vigorously]!!!”

But …But …

.NET Remoting.NET Remoting

CaveatsCaveats

1.1. Won’t interop with Indigo on wireWon’t interop with Indigo on wire

2.2. Harder to port than asmx/ws codeHarder to port than asmx/ws code

3.3. Requires sharing assemblies – intimate Requires sharing assemblies – intimate interaction, not service-orientedinteraction, not service-oriented

4.4. No security built inNo security built in

.NET Remoting.NET Remoting

Caveats, continuedCaveats, continued

5.5. Few wizards, not nearly as much mind-share Few wizards, not nearly as much mind-share as web servicesas web services

6.6. Fewer people doing it; Harder to find expertsFewer people doing it; Harder to find experts

7.7. Your COM reflexes feel like they’ll work, Your COM reflexes feel like they’ll work, but often don’tbut often don’t

To Explorer .NET Remoting FurtherTo Explorer .NET Remoting Further

““Design and Develop Seamless Distributed Design and Develop Seamless Distributed Applications for the Common Language Applications for the Common Language Runtime” by Dino Esposito, MSDN Magazine, Runtime” by Dino Esposito, MSDN Magazine, October 2002; Online at: October 2002; Online at: http://msdn.microsoft.com/msdnmag/issues/http://msdn.microsoft.com/msdnmag/issues/02/10/NETRemoting/02/10/NETRemoting/

Introducing Microsoft .NET, 3rd EditionIntroducing Microsoft .NET, 3rd Edition, by , by David S. Platt, Microsoft Press; Chapter 10.David S. Platt, Microsoft Press; Chapter 10.

Advanced .NET Remoting by Ingo Rammer, Advanced .NET Remoting by Ingo Rammer, A! Press; Separate editions available A! Press; Separate editions available in C# and VB in C# and VB

WinsockWinsock

Closest-to-the metal programmingClosest-to-the metal programming

Earliest cross-platform programmingEarliest cross-platform programming

Available to managed applications via Available to managed applications via System.Net.Sockets namespaceSystem.Net.Sockets namespace

System.Net.SocketsSystem.Net.SocketsSystem.Net.SocketsSystem.Net.Sockets

WinsockWinsock

AdvantagesAdvantages

1.1. Very tight, finest-grained control Very tight, finest-grained control

2.2. Work with earliest cross-platform Work with earliest cross-platform legacy apps, particularly mainframes legacy apps, particularly mainframes

WinsockWinsock

CaveatsCaveats1.1. Low level of abstraction, you spend Low level of abstraction, you spend

lots of time on little stuff lots of time on little stuff

2.2. Geeks like low abstraction, but it Geeks like low abstraction, but it doesn’t make moneydoesn’t make money

3.3. Mostly for plumbersMostly for plumbers

To Explore Winsock FurtherTo Explore Winsock Further

““VB.NET TCP Client - Server Socket VB.NET TCP Client - Server Socket Communications,” by Peter A. Bromberg, Communications,” by Peter A. Bromberg, Ph.D.; Online at: Ph.D.; Online at: http://www.eggheadcafe.com/articles/200203http://www.eggheadcafe.com/articles/20020323.asp23.asp

““The Dryer ate my Winsock” The Dryer ate my Winsock” by Randy Cragin; Online at: by Randy Cragin; Online at: http://members.cox.net/randus/VB9.htmhttp://members.cox.net/randus/VB9.htm

Network Programming for the Microsoft .NET Network Programming for the Microsoft .NET Framework, by Anthony Jones, Jim Ohlund, Framework, by Anthony Jones, Jim Ohlund, and Lance Olson; Microsoft Press, 2003, and Lance Olson; Microsoft Press, 2003, ISBN 073561959X ISBN 073561959X

HTTP And FTPHTTP And FTP

Higher level protocols than socketsHigher level protocols than sockets

More details abstracted awayMore details abstracted away

HTTP available through: HTTP available through: System.Net.WebRequest and System.Net.WebRequest and WebResponse classWebResponse class

FTP coming in WhidbeyFTP coming in Whidbey

HttpWebRequestHttpWebRequestHttpWebRequestHttpWebRequest

HTTP And FTPHTTP And FTP

AdvantagesAdvantages1.1. Easy programmingEasy programming

2.2. Goes just about everywhereGoes just about everywhere

CaveatsCaveats1.1. Still low level of abstractionStill low level of abstraction

2.2. Still most useful for plumbersStill most useful for plumbers

To Explore HTTP FurtherTo Explore HTTP Further

““System.Net.HttpWebRequestClass”, System.Net.HttpWebRequestClass”, online at: online at: http://www.dotnet247.com/247referenchttp://www.dotnet247.com/247reference/System/Net/HttpWebRequest.aspxe/System/Net/HttpWebRequest.aspx

Network Programming for the Network Programming for the Microsoft .NET Framework, by Anthony Microsoft .NET Framework, by Anthony Jones, Jim Ohlund, and Lance Olson; Jones, Jim Ohlund, and Lance Olson; Microsoft Press, 2003, Microsoft Press, 2003, ISBN 073561959XISBN 073561959X

Web ServicesWeb Services

SOAP-based web services first SOAP-based web services first available via COM-based SOAP toolkit available via COM-based SOAP toolkit – being retired July 1, 2004– being retired July 1, 2004

Essentially all of .NET was designed to Essentially all of .NET was designed to enable web servicesenable web services

Service-oriented architecture requires Service-oriented architecture requires different design thinking – different design thinking – See Rich Turner’s blog given earlierSee Rich Turner’s blog given earlier

Web ServicesWeb Services

WS classes in Visual Studio provide WS classes in Visual Studio provide basic connectivitybasic connectivity

Web Service Enhancements 2.0 adds Web Service Enhancements 2.0 adds security: Authentication, Integrity, security: Authentication, Integrity, EncryptionEncryption

Also adds routing and Also adds routing and attachment supportattachment support

Official product, but time-limited Official product, but time-limited support: 2 years standard, 1 extendedsupport: 2 years standard, 1 extended

Web Service Web Service Enhancements 2.0Enhancements 2.0Web Service Web Service Enhancements 2.0Enhancements 2.0

Web ServicesWeb Services

Advantages Advantages

1.1. Much easier programming of clients Much easier programming of clients than soap toolkitthan soap toolkit

2.2. Much, much easier programming of Much, much easier programming of servers, dittoservers, ditto

3.3. Web Services Enhancements for Web Services Enhancements for security, routing, and attachmentssecurity, routing, and attachments

4.4. Future development work proceeds Future development work proceeds along this path – look out for “Indigo”along this path – look out for “Indigo”

Web ServicesWeb Services

CaveatsCaveats1.1. You have to make the change; It’s timeYou have to make the change; It’s time

To Explore FurtherTo Explore Further

““Migrating from the SOAP Toolkit to Migrating from the SOAP Toolkit to Web Services”, by Peter Vogel, online Web Services”, by Peter Vogel, online at: at: http://msdn.microsoft.com/webservicehttp://msdn.microsoft.com/webservices/building/soaptk/default.aspx?pulls/building/soaptk/default.aspx?pull=/library/en-us/=/library/en-us/dndotnet/html/migrsoapwebserv.aspdndotnet/html/migrsoapwebserv.asp.NET Web Services: Architecture and .NET Web Services: Architecture and Implementation, by Keith Ballinger, Implementation, by Keith Ballinger, Addison-Wesley, 2003 ISBN 0-321-Addison-Wesley, 2003 ISBN 0-321-11359-411359-4

To Explore Further, Cont’dTo Explore Further, Cont’d

The Microsoft Platform Ahead, by The Microsoft Platform Ahead, by David S. Platt; Microsoft Press, 2004; David S. Platt; Microsoft Press, 2004; Chapter 4 covers the Web Service Chapter 4 covers the Web Service Enhancements, version 2.0. Enhancements, version 2.0.

Rich Turner’s blog “On the Road to Rich Turner’s blog “On the Road to ‘Indigo’ ” ‘Indigo’ ”

http://blogs.msdn.com/richturner666/http://blogs.msdn.com/richturner666/

ConclusionConclusion

Managed Code is not that different Managed Code is not that different from what you’re doing now from what you’re doing now

Almost everything you currently do Almost everything you currently do unmanaged can be done managed, unmanaged can be done managed, probably better and more easilyprobably better and more easily

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© 2004 Microsoft Corporation. All rights reserved.This presentation is for informational purposes only. Microsoft makes no warranties, express or implied, in this summary.