Chapter 16
Update Transactions
The most well-defined and understood SOA interaction pattern is a simple read-only, request-reply. The request-reply interaction mimics human conversation, and a read-only CRUD operation is far simpler than an update. The service consumer submits a request for information, and the service carries out the activities necessary to identify, acquire, and return data elements in a reply that meets the request. The simple read-only, request-reply pattern is also the most common across SOA implementations, as well as being the most limited (see Figure 16.1). As implied by the read-only operation, there is no capability to enable the other CRUD operations of Create, Update, and Delete.
Figure 16.1 Simple Read-Only, Request-Reply ...
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