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  • Book Overview & Buying Learning NServiceBus - Second Edition
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Learning NServiceBus - Second Edition

Learning NServiceBus - Second Edition - Second Edition

By : David Boike
4.8 (6)
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Learning NServiceBus - Second Edition

Learning NServiceBus - Second Edition

4.8 (6)
By: David Boike
Buy this Book

Overview of this book

If you are a .NET developer who wants to eliminate the problems related to defective third-party web service integration or batch job failures, then this is the book for you. It is also perfect for those of you who are new to NServiceBus and service-oriented architecture and would like to learn how you can streamline all of your development efforts.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Getting on the IBus
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1. Getting on the IBus
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Why use NServiceBus?
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Getting the code
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Our first example
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Creating a message assembly
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Creating a service endpoint
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Creating a message handler
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Sending a message from an MVC application
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Running the solution
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Summary
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2. Messaging Patterns
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2. Messaging Patterns
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Commands versus events
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Events
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Message routing
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Summary
3
3. Preparing for Failure
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3. Preparing for Failure
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Fault tolerance and transactional processing
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Error queues and replay
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Messages that expire
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Auditing messages
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Web service integration and idempotence
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Summary
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4. Hosting
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4. Hosting
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Hosting types
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Assembly scanning
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Choosing an endpoint name
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Dependency injection
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Message transport
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Persistence
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Message serialization
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Transactions
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Purging the queue on startup
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Installers
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Startup
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Summary
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5. Advanced Messaging
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5. Advanced Messaging
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Unobtrusive mode
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Message versioning
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Specifying the handler order
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Message actions
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Property encryption
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Transporting large payloads
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Exposing web services
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Summary
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6. Sagas
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6. Sagas
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Long-running processes
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Defining a saga
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Finding saga data
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Ending a saga
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Dealing with time
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Design guidelines
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Persistence concerns
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Unit testing
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Scheduling
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Summary
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7. Advanced Configuration
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7. Advanced Configuration
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Extending NServiceBus
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Dependency injection
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Unit of work
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Message mutators
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The NServiceBus pipeline
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Outbox
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Summary
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8. The Service Platform
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8. The Service Platform
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ServiceControl
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ServiceInsight
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ServicePulse
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ServiceMatrix
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Summary
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9. Administration
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9. Administration
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Service installation
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Profiles
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Managing configurations
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Monitoring performance
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Scalability
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Multiple sites
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Virtualization
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Transport administration
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Summary
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10. Where to Go from Here?
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10. Where to Go from Here?
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What we've learned
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What next?
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Index
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Index

Web service integration and idempotence

When talking about managing failure, it's important to spend a few minutes discussing web services because they are such a special case; they are just too good at failing.

In the previous chapter, we discussed only doing as much work within a message handler as you can reliably perform within the scope of one transaction. For database operations, this limitation is obvious. For some other non-transactional operations (sending email comes to mind), it is easy to isolate that operation within its own message handler. When the message is processed, the email would either be sent or it won't; there really aren't any in-between cases.

Note

In reality, when sending an email, it is technically possible that we could call the SMTP server, successfully send an email, and then the server could fail before we are able to finish marking the message as processed. However, in practice, this chance is so infinitesimal that we generally assume it to be...

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Learning NServiceBus - Second Edition
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