By Klaus Aschenbrenner
Seasoned SQL Server 2005 provider dealer through Klaus Aschenbrenner, a global professional on provider dealer, explains why Microsoft brought carrier dealer and describes its merits over past message applied sciences. wealthy with sensible examples, this is often the main whole and incisive publication in this vital new technology—an important source for all severe database and net builders. fascinated with most sensible practices, it explains intimately how provider dealer helps and complements database and internet purposes. This ebook not just covers provider dealer basics, but in addition addresses present an important issues like service-oriented structure (SOA) and service-oriented info structure (SODA).
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Seasoned SQL Server 2005 carrier dealer via Klaus Aschenbrenner, a world specialist on provider dealer, explains why Microsoft brought provider dealer and describes its benefits over previous message applied sciences. wealthy with useful examples, this is often the main entire and incisive publication in this vital new technology—an helpful source for all critical database and net builders.
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Extra info for Pro SQL Server 2005 Service Broker (Expert's Voice)
Fm Page 25 Tuesday, April 3, 2007 9:21 PM CHAPTER 2 ■ INTRODUCTION TO SERVICE BROKER Because queues are implemented as hidden database tables, messages share all the highavailability features that safeguard SQL Server data. All the features that you use to ensure that your SQL Server data isn’t lost or damaged—such as transactions, logging, backup, mirroring, clustering, and so on—also apply to Service Broker messages. Service Programs In Service Broker, a service program can be a stored procedure, when internal activation is used, or a separate program, when external activation is used.
Distributed transactions make life easier when you work with different resource managers, but they’re terrible in terms of performance. Service Broker takes another approach and uses local SQL Server transactions instead of distributed transactions. This is possible because messages and the messageprocessing logic (service programs) are stored within the same database. • Single log writes: Because Service Broker uses local SQL Server transactions, performance is also better, since no transaction coordinator is needed.
Message Types The simple sample application used in this chapter follows the following messaging sequence: • The initiator service sends a message to the target service containing some important information, such as a name. • The target service receives the message and processes it. • The target service creates a response message and sends it back to the initiator service. Figure 3-1 illustrates this message flow. Figure 3-1. A simple message flow As with every Service Broker application, you must first define the interface for your Service Broker services, which includes the exchanged message types and the contracts supported by your Service Broker services.
Pro SQL Server 2005 Service Broker (Expert's Voice) by Klaus Aschenbrenner