learning how to build distributed, scalable applications ... · architecting, designing,...

Learning How To Build Learning How To Build Distributed, Scalable Distributed, Scalable Applications With Applications With COM+COM+

COM+ Team COM+ Team Microsoft CorporationMicrosoft Corporation

AgendaAgendaGoalsGoalsScenario recap and requirements Scenario recap and requirements (continued)(continued)Using COM+ to meet application Using COM+ to meet application requirements (continued) requirements (continued) Even easier Even easier -- coming soon (part 2)coming soon (part 2)ConclusionConclusion

GoalsGoalsShow by example that COM+ makes it:Show by example that COM+ makes it:

As easy to develop Server Components As easy to develop Server Components as it is to develop Client Componentsas it is to develop Client ComponentsAs easy to deliver enterprise apps as it As easy to deliver enterprise apps as it is to deliver workgroup apps! is to deliver workgroup apps!

COM+COM+COM+ Services:COM+ Services:EventsEventsSecuritySecurityLoad Load

BalancingBalancingQueued Queued ComponentsComponents

In Memory In Memory DatabaseDatabase

CompensatingCompensatingResourceResourceManagerManager

AdministrationAdministration

MTSMTS

MTS Services:MTS Services:TransactionsTransactionsResource PoolingResource PoolingSecuritySecurityAdministrationAdministration

COMCOMTheThe ModelModelTools SupportTools SupportMultiMulti--LanguageLanguageDiscovery (QI)Discovery (QI)

COM+The Caring, Sharing

Environment for yourcomponents

COM+COM+The Caring, SharingThe Caring, Sharing

Environment forEnvironment for youryourcomponentscomponents

Technology ScenarioTechnology Scenario

Application ScenarioApplication ScenarioOnline service like MSN or AOLOnline service like MSN or AOLUser login causes two databases User login causes two databases to be updatedto be updated

Customer Billing LogCustomer Billing LogCustomer login statusCustomer login status

Total connect time is trackedTotal connect time is trackedUser is notified of various activities User is notified of various activities while they are logged in while they are logged in (i.e., chat rooms)(i.e., chat rooms)

Web Web clientsclients Web Web infrastructureinfrastructureLogonLogon

BusinessBusiness applicationsapplications

LogoffLogoff

SecuritySecuritybillingbilling

RealReal--timetimeProfileProfile--directeddirected

informationinformation

ContentContent

BillingBilling

ExistingExistingBilling Billing SystemSystem

ExistingExistingBilling Billing SystemSystemExistingExistingBilling Billing SystemSystemCustomerCustomer

onlineonlinesystemsystem

ExistingExistingBilling Billing SystemSystemExistingExistingBilling Billing SystemSystemExistingExistingbilling billing systemsystem

ExistingExistingBilling Billing SystemSystemExistingExistingBilling Billing SystemSystemExistingExistingBilling Billing SystemSystemExistingExistingbilling billing systemsystem ExistingExisting

Billing Billing SystemSystemExistingExistingBilling Billing SystemSystem

OtherOthersystemssystems

Application FlowApplication Flow

Tackling The Application Tackling The Application Requirements Requirements -- Part 2Part 2

Ultimate customer Ultimate customer response and response and availabilityavailabilityAlways accept Always accept legitimate Logonlegitimate LogonNo freebies! Always No freebies! Always bill for entire time bill for entire time onlineonlineUse existing Use existing billing systembilling systemUse existing Use existing dev resourcesdev resourcesOtherOther……

Keep billing, Keep billing, Customer Online and Customer Online and other systems other systems consistentconsistentRealReal--time two way time two way info on who is oninfo on who is onRealReal--time info on what time info on what is going onis going onFlexible Flexible administrationadministrationMaximize use of Maximize use of platform, minimize platform, minimize development timedevelopment time

Contradictory Requirements!Contradictory Requirements!Always accept logon:Always accept logon:

Implies that we have to complete the Implies that we have to complete the customer login even if the billing customer login even if the billing system is unavailablesystem is unavailable

Always bill for entire time online:Always bill for entire time online:Implies that we must not accept logons Implies that we must not accept logons when billing system is not availablewhen billing system is not available

ClientClientApplicationApplicationComponentComponent

ServerServerApplicationApplicationComponentComponentIFooIFoo

ToleranceToleranceIssues:Issues:

AvailabilityAvailabilityResilienceResilienceFailure HandlingFailure Handling

Bus_CustomerBus_Customer

ServerServerApplicationApplicationComponentComponentIFooIFoo

MSMQMSMQ

ClientClientApplicationApplicationComponentComponent

IRecorderIRecorder

RecorderRecorder PlayerPlayerServerServer

ApplicationApplicationComponentComponentIFooIFoo

ToleranceToleranceCOM+ solution: Queued ComponentsCOM+ solution: Queued Components

Features:Features: delivery of delivery of creationcreation, method , method invocationinvocation, and , and life cyclelife cycle management management over over MSMQ queuesMSMQ queues with with transactionstransactions

Queued Components Queued Components ExampleExample

Code and attribute walkthrough Code and attribute walkthrough Login example would not allow a Login example would not allow a person to logon if the billing database person to logon if the billing database was not availablewas not availableIt is not necessary for the billing DB It is not necessary for the billing DB to be available right now as long as we to be available right now as long as we are guaranteed that the login are guaranteed that the login information will be recordedinformation will be recorded

Ref: AS10Ref: AS10


Ultimate customer Ultimate customer response and response and availabilityavailabilityAlways accept Always accept legitimate logonlegitimate logonNo freebies! Always No freebies! Always bill for entire bill for entire time onlinetime onlineUse existing Use existing billing systembilling systemUse existing Use existing dev resourcesdev resourcesOtherOther……

Keep billing, Keep billing, Customer Online and Customer Online and other systems other systems consistentconsistentRealReal--time two way info time two way info on who is onon who is onRealReal--time info on what time info on what is going onis going onFlexible Flexible administrationadministrationMaximize use of Maximize use of platform, minimize platform, minimize development timedevelopment time

Responding To EnvironmentResponding To EnvironmentIssuesIssues

BusCustomerXBusCustomerX

BusCustomerCBusCustomerC

Bus_Billing23Bus_Billing23

Bus_BillingBus_Billing

Bus_CustomerBus_Customer BusCustomerABusCustomerA

You Never Told Me That!You Never Told Me That!Changing EnvironmentChanging EnvironmentObject Model? What Object Model?Object Model? What Object Model?

MulticastMulticastICustLoginICustLogin

Sink2Sink2

ICustLoginICustLoginSink3Sink3

ICustLoginICustLoginSink4Sink4

UnboundUnboundUnboundUnbound

Application ClientApplication Client

UnicastUnicastICustLoginICustLogin

Sink1Sink1

IEventXXXIEventXXX

EventEventClassClass

EventEventDatabaseDatabase

EventEventAdminAdmin

Responding To EnvironmentResponding To EnvironmentSolution:Solution: COM+ EventsCOM+ Events

Features:Features: sources consume event sinks, sources consume event sinks, system provided system provided event classevent class, managed , managed bindingbinding and and deliverydelivery optionsoptions

Events ExampleEvents ExampleEvents WalkthroughEvents Walkthrough

When the user logs in the customer status When the user logs in the customer status database is updateddatabase is updatedIn order to notify the user on things that they are In order to notify the user on things that they are interested you can publish the interesting events interested you can publish the interesting events and have clients and have clients

Poll the status database on a regular basis and Poll the status database on a regular basis and then push information to them; this is not very then push information to them; this is not very efficient doing a lot of unnecessary work; efficient doing a lot of unnecessary work; or you canor you can……Build specific interfaces, protocols, and Build specific interfaces, protocols, and infrastructure for notificationinfrastructure for notification

Code walkthroughCode walkthroughRef: AS07Ref: AS07




ApplicationApplicationClientsClients

Server Server

Server 1Server 1IBankIBank


coclass Bank coclass Bank [[LBLB=Yes,]=Yes,]IIBankIIBank

Even More Scalability Even More Scalability And AvailabilityAnd Availability

Issues:Issues:WeWe’’ll never go above 600 clients! Honest!ll never go above 600 clients! Honest!Of course my application scalesOf course my application scales

What hardware are you running?What hardware are you running?

ApplicationApplicationClientClient

CreateCreateLBLB

ActivatorActivatorTrackTrack

Response TimeResponse TimeEngineEngine

LB ServiceLB Service

Response TimeResponse TimeRuntimeRuntime

Server GroupServer Group




Select serverSelect server

Even More Scalability Even More Scalability And AvailabilityAnd Availability

Solution:Solution: COM+ Dynamic Load BalancingCOM+ Dynamic Load BalancingFeatures:Features: system provided system provided response timeresponse time load load balancing engine, @ balancing engine, @ activationactivation server server machine selection machine selection

Load Balancing ExampleLoad Balancing ExampleLoad Balancing WalkthroughLoad Balancing Walkthrough

As the online service increases in As the online service increases in popularity they will need to run the popularity they will need to run the application on multiple serversapplication on multiple serversLoad Balancing will distribute the work of Load Balancing will distribute the work of the application over the available serversthe application over the available serversIn COM+ Preview, balancing algorithm is In COM+ Preview, balancing algorithm is based on tracker statisticsbased on tracker statistics

LB set up and attribute walkthroughLB set up and attribute walkthroughRef: AS08Ref: AS08




Ultimate PerformanceUltimate PerformanceIssueIssue

DBMSDBMSClientsClients

Server GroupServer Group




No matter how well I do everything the No matter how well I do everything the Database is still the bottleneck!Database is still the bottleneck!

ClientClient DBMSDBMSIMDBIMDBServerServer

Ultimate PerformanceUltimate PerformanceCOM+ Solution:COM+ Solution: IMDB provides IMDB provides memory speed access to data, memory speed access to data, transient state managementtransient state management

RDBMSRDBMS

Client Component ProcessClient Component Process

Client component Client component processprocess

IMDB CoreIMDB Core

A "typical"A "typical"IMDB NodeIMDB Node

IMDB ProxyIMDB Proxy

IMDB ProxyIMDB Proxy

R/W R/W R/WR/W

R/WR/W

Tables inTables inShared MemoryShared Memory

HTTPHTTP DCOMDCOM

R/OR/O

R/OR/O

RDBMSRDBMS

IMDB IMDB -- How It Works How It Works

IMDB ExampleIMDB ExampleIMDB WalkthroughIMDB WalkthroughSelecting data for use with IMDBSelecting data for use with IMDBIMDB code and IMDB code and administration walkthroughadministration walkthroughRef: AS11Ref: AS11


Ultimate customer Ultimate customer response and response and availabilityavailabilityAlways accept Always accept legitimate logonlegitimate logonNo freebies! Always No freebies! Always bill for entire time bill for entire time onlineonlineUse existing billing Use existing billing systemsystemUse existing Use existing dev resourcesdev resourcesOtherOther……


Ultimate ScalabilityUltimate ScalabilityIssue:Issue:

You are doing PoolingYou are doing Pooling

COM+ ServerCOM+ Server ProcessProcess


ApplicationApplicationServerServerApplicationApplication

ServerServerIFooIFoo

ObjectObjectinstancesinstances

Why canWhy can’’t I?t I?



PoolingPoolingServiceService



PooledPooledinstancesinstances

Ultimate ScalabilityUltimate ScalabilityCOM+ Solution:COM+ Solution:Object Pooling:Object Pooling: ultimate efficiency for ultimate efficiency for components whose components whose ““in Method timein Method time”” is is less than their less than their ““construction Timeconstruction Time””



PoolingPoolingServiceService



PooledPooledinstancesinstances

Ultimate ScalabilityUltimate ScalabilityObject Pooling WalkthroughObject Pooling WalkthroughRef: AS14Ref: AS14



Keep billing, Keep billing, Customer Online and Customer Online and other systemsother systemsconsistentconsistentRealReal--time two way time two way info on who is oninfo on who is onRealReal--time info on what time info on what is going onis going onFlexible Flexible administrationadministrationMaximize use of Maximize use of platform, minimize platform, minimize development timedevelopment time

ApplicationApplicationComponentsComponents

CRMCRM DBMSDBMSLegacy AppLegacy App

Dealing With Legacy AppsDealing With Legacy AppsCOM+ Solution:COM+ Solution: compensating compensating Resource ManagerResource ManagerFeatures:Features: easy template for wrapping easy template for wrapping an application or a resource so that it an application or a resource so that it can participate in transactions with can participate in transactions with other resourcesother resources

How Are We Doing?How Are We Doing?Ultimate customer Ultimate customer response and response and availabilityavailabilityAlways accept Always accept legitimate logonlegitimate logonNo freebies! Always No freebies! Always bill for entire bill for entire time onlinetime onlineUse existing Use existing billing systembilling systemUse existing Use existing dev resourcesdev resourcesOtherOther……

Keep billing, Keep billing, Customer Online Customer Online and other systems and other systems consistentconsistentRealReal--time two way time two way info on who is oninfo on who is onRealReal--time info on time info on what is going onwhat is going onFlexible Flexible administrationadministrationMaximize use of Maximize use of platform, minimize platform, minimize development timedevelopment time

Even Easier! Even Easier! Coming soon to a language near you: Coming soon to a language near you: Attribute Based ProgrammingAttribute Based Programming

In Part 1 In Part 1 ““even easiereven easier”” we showed we showed integration of the IDE using Attributes integration of the IDE using Attributes and administrationand administrationThe logical next step is direct Attribute The logical next step is direct Attribute Based Programming (ABP)Based Programming (ABP)ABP demoABP demo

ConclusionConclusionCOM+ makes it:COM+ makes it:

As easy to develop Server Components As easy to develop Server Components as it is to develop Client Componentsas it is to develop Client ComponentsAs easy to deliver enterprise apps as it As easy to deliver enterprise apps as it is to deliver workgroup apps! is to deliver workgroup apps!

Call To ActionCall To ActionArchitecting, designing, developing:Architecting, designing, developing:

Assume COM+ level of service and use Assume COM+ level of service and use WindowsWindows NT 5.0 Beta 2 nowNT 5.0 Beta 2 now

Deploying and in production:Deploying and in production:Use MTS now Use MTS now -- your components will be your components will be uplifted when COM+ is installeduplifted when COM+ is installed

Everything discussed will be a standard Everything discussed will be a standard feature of Windows NTfeature of Windows NT®® 5.05.0

ResourcesResourceshttp://www.microsoft.com/comhttp://www.microsoft.com/comhttp://www.microsoft.com/msdnhttp://www.microsoft.com/msdnPDC CD:PDC CD:

COM+ SDKCOM+ SDKCOM+ Wizard previewCOM+ Wizard preview

HandsHands--on theatreon theatreAll the code from the COM+ sessionsAll the code from the COM+ sessionsSee Visual C++See Visual C++®® sessions for sessions for more on ABP!more on ABP!

1998 Microsoft1998 Microsoft®® Professional Professional Developers ConferenceDevelopers Conference

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