This IBM Redbook provides an overview of the latest release of WebSphere Message Broker and the Message Brokers Toolkit. It covers the following topics: installation; developing simple message flows using ESQL, Java, and Message Maps; developing simple message sets; broker administration tasks and deploying message flow applications; diagnosing and fixing problems; using the message Flow Debugger. This book also describes where to find more information, including product documentation and sample applications. Click here for IBM RedBooks pdfs : http://www.redbooks.ibm.com/redbooks/pdfs/sg247137.pdf |
Asynchronous Communication Advantages: Requests need not be targeted to specific server. Service need not be available when request is made. No blocking, so resources could be freed. Could use connectionless protocol Disadvantages: Response times are unpredictable. Error handling usually more complex. Usually requires connection-oriented protocol. Harder to design apps Synchronous Communication Advantages: Easy to program Outcome is known immediately Error recovery easier (usually) Better real-time response (usually) Disadvantages: Service must be up and ready. Requestor blocks, held resources are “tied up”. Usually requires connection-oriented protocol
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