Windows Server 2003 中的代码重用孙巍微软资深讲师 [email protected]

Windows Server 2003 中的代码重用

孙巍孙巍微软资深讲师微软资深讲师[email protected]

mailto:[email protected]

What we will coverWhat we will cover

COM+ COM+ 的概念及优点的概念及优点 Microsoft .NET / COM+ Microsoft .NET / COM+ 连接连接更强的服务及架构更强的服务及架构

Session PrerequisitesSession Prerequisites

Level 200Level 200

Visual BasicVisual Basic®® .NET or C# .NET or C# 的使用经验的使用经验熟悉数据库事务熟悉数据库事务不需要任何有关不需要任何有关 COMCOM 的经验的经验

Key MessagesKey Messages

Microsoft .NET Microsoft .NET 在企业服务上依靠于在企业服务上依靠于 COM+COM+

执行简单好处多执行简单好处多比重新开发一遍代码更划算比重新开发一遍代码更划算

DemonstrationsDemonstrations

COM+ COM+ 服务管理代码服务管理代码隔离级别和无组件的隔离级别和无组件的 COM+COM+ 服务服务队列组件队列组件

AgendaAgenda

COM+ COM+ 服务服务管理代码管理代码 COM+ 1.5 COM+ 1.5 增强增强更强的更强的 COM+ COM+ 服务服务

COM+ ServicesCOM+ ServicesOverviewOverview

企业服务架构及运行时企业服务架构及运行时过去的技术过去的技术

COMCOM Microsoft Transaction Server (MTS)Microsoft Transaction Server (MTS) COM+ 1.0COM+ 1.0

更强的管理界面更强的管理界面组件服务组件服务管理管理 APIAPI

COM+ ServicesCOM+ ServicesBenefitsBenefits

可靠性可靠性————事务的应用事务的应用规模性规模性————对象池以及即时活动的应用对象池以及即时活动的应用灵活性灵活性————松散耦合事件松散耦合事件批处理和组件队列保证消息传递批处理和组件队列保证消息传递简单执行简单执行————通过服务而不是组件通过服务而不是组件

COM+ ServicesCOM+ ServicesTransactionsTransactions

对组件提供事务性上下文对组件提供事务性上下文组件说明自己的事务性需求组件说明自己的事务性需求在一个事务中可以包含多个组件在一个事务中可以包含多个组件自动的提交或回滚自动的提交或回滚

COM+ ServicesCOM+ ServicesTransactionsTransactions

BB

DBDB

DBDB

AA

MSMQMSMQCC

COM+ ServicesCOM+ ServicesJust-In-Time ActivationJust-In-Time Activation

客户端请求前服务器资源始终是可用的客户端请求前服务器资源始终是可用的增加规模性增加规模性

返回调用之后变为不活动的状态返回调用之后变为不活动的状态资源回收资源回收客户端认为所有对象都是活动的客户端认为所有对象都是活动的

仅在方法调用时变为活动的仅在方法调用时变为活动的使用无状态对象使用无状态对象

COM+ ServicesCOM+ ServicesObject PoolingObject Pooling

内存中的对象实例池内存中的对象实例池客户端请求客户端请求

在可用的情况下从池中返回实例在可用的情况下从池中返回实例客户端请求一直被阻止直到实例可用或超时时客户端请求一直被阻止直到实例可用或超时时

对对 “ “昂贵的昂贵的” ” 对象使用对象池对象使用对象池创建创建获取获取

COM+ ServicesCOM+ ServicesObject PoolingObject Pooling

最大最大 // 最小设置最小设置减少相应时间减少相应时间

更高的最小值更高的最小值减少最大请求数量减少最大请求数量

降低最大值降低最大值

AgendaAgenda


Managed CodeManaged CodeSystem.EnterpriseServicesSystem.EnterpriseServices

MTS MTS 和和 COM+COM+ 的后续支持的后续支持提供以下支持提供以下支持

分布式事务分布式事务 Just-In-Time activationJust-In-Time activation 对象池对象池安全性安全性队列组件队列组件松散耦合事件松散耦合事件服务应用程序处理模式服务应用程序处理模式

Managed CodeManaged CodeProgramming ModelProgramming Model

public class AccountClient

private void btnTransactions_Click() { Account acc = New Account(); acc.Credit() }}

Managed CodeManaged CodeProgramming ModelProgramming Model

using System;using System.EnterpriseServices;[assembly : ApplicationName("TxDemo")] [TransactionAttribute()]public class Account : ServicedComponent { [AutoCompleteAttribute()] public void Credit() { // do some work }}

Managed CodeManaged CodeAssembly AttributesAssembly Attributes

ApplicationNameAttributeApplicationNameAttribute ApplicationIDAttributeApplicationIDAttribute ApplicationActivationAttributeApplicationActivationAttribute ApplicationAccessControlAttributeApplicationAccessControlAttribute ApplicationQueuingAttributeApplicationQueuingAttribute

Managed CodeManaged CodeClass AttributesClass Attributes

TransactionAttributeTransactionAttribute JustInTimeActivationAttributeJustInTimeActivationAttribute ObjectPoolingAttributeObjectPoolingAttribute PrivateComponentAttributePrivateComponentAttribute ComponentAccessControlAttributeComponentAccessControlAttribute SecurityRoleAttributeSecurityRoleAttribute EventClassAttributeEventClassAttribute InterfaceQueuingAttributeInterfaceQueuingAttribute

Managed CodeManaged CodeRegistrationRegistration

必须注册在必须注册在 COM+ COM+ 目录中目录中创建创建 COM+ COM+ 应用应用安装组件安装组件配置组件配置组件

自动注册自动注册 RegSvcs.exeRegSvcs.exe RegistrationHelper RegistrationHelper 类类

Managed CodeManaged CodeRegistrationRegistration

CLR / Dynamic CLR / Dynamic registrationregistration RegistrationHelperRegistrationHelper

RegSvcs.exeRegSvcs.exe

Your admin Your admin codecode

COM+ COM+ catalogcatalog

AssemblyAssembly

Demonstration 1Demonstration 1COM+ ServicesCOM+ Services

In Managed CodeIn Managed Code

TransactionsTransactionsRegistrationRegistration

AgendaAgenda


COM+ 1.5 EnhancementsCOM+ 1.5 EnhancementsIsolation LevelIsolation Level

管理并发的数据访问管理并发的数据访问使用使用 SQL SQL 语句语句可配置可配置

组件服务组件服务 TransactionAttributeTransactionAttribute

[Transaction(Isolation=TransactionIsolationLevel.ReadUncommitted)]


Insert…Insert…John DoeJohn Doe

123 Main St.123 Main St.Redmond, WARedmond, WA

Select …Select …Where State = WAWhere State = WA


默认为串行默认为串行安全但是受限制安全但是受限制会降低性能会降低性能

降低隔离级别降低隔离级别潜在的可以增加并发、性能以及规模潜在的可以增加并发、性能以及规模会导致读脏数据会导致读脏数据

COM+ 1.5 EnhancementsCOM+ 1.5 EnhancementsServices Without ComponentsServices Without Components

Transactions without ServicedComponentTransactions without ServicedComponent More implementation optionsMore implementation options

ServiceConfigServiceConfig Set context options like IsolationLevel and Set context options like IsolationLevel and

TransactionTimeoutTransactionTimeout

ServiceDomainServiceDomain Enter and leave transactionEnter and leave transaction Query transaction resultQuery transaction result

ContextUtilContextUtil Vote with SetComplete and SetAbortVote with SetComplete and SetAbort


ServiceConfig config = new ServiceConfig();

config.Transaction = TransactionOption.RequiresNew;config.TransactionTimeout = 30;config.IsolationLevel = TransactionIsolationLevel.ReadUncommitted;

ServiceDomain.Enter(config);


…ServiceDomain.Enter(config);try{ sqlCom1.ExecuteNonQuery(); sqlCom2.ExecuteNonQuery(); ContextUtil.SetComplete();}catch{ ContextUtil.SetAbort();}TransactionStatus s = ServiceDomain.Leave();

COM+ 1.5 EnhancementsCOM+ 1.5 EnhancementsPrivate ComponentsPrivate Components

COM+ 1.0COM+ 1.0 所有组件都是公共的所有组件都是公共的

COM+ 1.5COM+ 1.5 可配置组件的作用域可配置组件的作用域 Public—Public— 其他应用程序可用其他应用程序可用 Private—Private— 仅同一个应用程序可用仅同一个应用程序可用

Demonstration 2Demonstration 2COM+ 1.5 EnhancementsCOM+ 1.5 Enhancements

Isolation LevelIsolation LevelServices Without ComponentsServices Without Components

AgendaAgenda

COM+ COM+ 服务服务管理代码管理代码 COM+ 1.5 COM+ 1.5 增强增强高级高级 COM+ COM+ 服务服务

Advanced COM+ ServicesAdvanced COM+ ServicesProcess InitializationProcess Initialization

获取获取 COM+ COM+ 应用程序启动和关闭事件应用程序启动和关闭事件 IProcessInitializer IProcessInitializer 接口接口

启动启动所有工作必须在所有工作必须在 9090 秒内完成秒内完成

关闭关闭不保证序列不保证序列实例运行在应用程序中实例运行在应用程序中

Advanced COM+ Services Advanced COM+ Services Queued ComponentsQueued Components

异步组件调用的架构异步组件调用的架构 MSMQ MSMQ 提供传输的可靠性提供传输的可靠性增加客户端性能增加客户端性能

不依靠于应用程序的可靠性不依靠于应用程序的可靠性立刻返回调用立刻返回调用

增加服务器性能增加服务器性能更短的组件生存周期更短的组件生存周期有计划的批处理有计划的批处理

ClientClient


ServerServer

QueueQueue

ComponentComponent

Listener / PlayerListener / Player

AppApp

RecorderRecorder

Method CallMethod Call

Call ReturnCall Return

Method CallMethod Call


InterfaceQueuingAttributeInterfaceQueuingAttribute Class levelClass level Identifies what interfaces to expose for Identifies what interfaces to expose for

queuingqueuing

ApplicationQueuingAttributeApplicationQueuingAttribute Assembly levelAssembly level Notifies COM+ to create and activate a Notifies COM+ to create and activate a

listenerlistener


Client uses Marshal.BindToMoniker with Client uses Marshal.BindToMoniker with COM moniker to get object referenceCOM moniker to get object reference

IFoo iQc = null;string m = "queue:/new:MyApp.Bar"

iQc=(IFoo)Marshal.BindToMoniker(m);

Advanced COM+ Services Advanced COM+ Services Loosely Coupled EventsLoosely Coupled Events

后期消息绑定模型的事件发布后期消息绑定模型的事件发布多对多的发布多对多的发布发布者和订阅者通过事件类绑定，而不是相发布者和订阅者通过事件类绑定，而不是相互绑定互绑定

COM+ COM+ 管理订阅管理订阅 Component ServicesComponent Services COM+ APICOM+ API

COM+COM+Event ClassesEvent Classes

SubscriptionsSubscriptions

Register EventRegister Event

Add SubscriptionAdd Subscription


SubscriberSubscriber

CustomSinkCustomSink

CustomEventCustomEvent

CustomEventCustomEvent

CustomSinkCustomSink

PublisherPublisher

CustomEvent ec = new CustomEvent();ec.SomeEvent();


持续持续 / / 短暂订阅短暂订阅事件队列事件队列并行执行并行执行事件过滤事件过滤

Demonstration 3Demonstration 3Queued ComponentsQueued Components

Creating a Queued ComponentCreating a Queued ComponentCalling a Queued ComponentCalling a Queued Component

Session SummarySession Summary

使用使用 COM+ COM+ 服务服务 Increase reliabilityIncrease reliability Increase scalabilityIncrease scalability Increase flexibilityIncrease flexibility

EnterpriseServicesEnterpriseServices 通过属性实现更加简单通过属性实现更加简单

For More Information…For More Information…

MSDN Web site at MSDN Web site at msdn.microsoft.commsdn.microsoft.com

Writing Serviced ComponentsWriting Serviced Components http://msdn.microsoft.com/library/en-us/cphttp://msdn.microsoft.com/library/en-us/cp

guide/html/cpconwritingservicedcomponenguide/html/cpconwritingservicedcomponents.aspts.asp

COM+ Services Without ComponentsCOM+ Services Without Components http://msdn.microsoft.com/library/http://msdn.microsoft.com/library/

default.asp?url=/library/en-us/cossdk/default.asp?url=/library/en-us/cossdk/htm/htm/pgservices_serviceswithoutcomponents_7pgservices_serviceswithoutcomponents_7u5v.aspu5v.asp

http://msdn.microsoft.com/library/en-us/cpguide/html/cpconwritingservicedcomponents.asp



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Windows Server 2003 中的代码重用 孙巍微软资深讲师 [email protected]

Windows Server 2003 中的代码重用孙巍微软资深讲师 [email protected]