Chapter 3 Service Endpoint Design

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Customer

Weather Web Service Endpoint

Processing Layer

Request weather information

Request weather information

Return weather information

Return weather information

Figure 3.5

Weather Information Service Interaction

The weather information service is a good example of a synchronous interac 

tion between a client and a service. When it receives a client's request, the weather

service must look up the required information and send back a response to the

client. This look up and return of the information can be achieved in a relatively

short time, during which the client can be expected to block and wait. The client

continues its processing only after it obtains a response from the service. (See

Figure 3.5.)

Interaction Layer

Processing Layer

Business

Web

Web

Logic

Service

Service

Client

Endpoint

Figure 3.6

Synchronous Interaction Between Client and Service