It is important to understand that the calling semantics of local interfaces are different from those of remote interfaces. For example, remote interfaces pass parameters using call-by-value semantics, while local interfaces use call-by-reference. This...
EJB was originally designed around remote invocation using the Java Remote Method Invocation (RMI) mechanism, and later extended to support to standard CORBA transport for these calls using RMI/IIOP. This design allowed for maximum...
Web Service Broker Design Pattern? Example for Web Service Broker Web Service Broker Design Pattern Web Service Broker access services using XML and web protocols Problem J2EE applications expose coarse-grained business services using Service...
Domain Store Design Pattern? Example for Domain Store Domain Store Design Pattern? Domain Store is used for separating persistence from object model. Problem Many systems have a complex object model that requires sophisticated persistence...
Service Activator Design Pattern? Example for Service Activator Service Activator Design Pattern? Service Activator facilitates asynchronous processing for EJB components. Problem A client invokes a business service and waits until the business service returns...
Data Access Object Design Pattern? Example for Data Access Object Data Access Object Design Pattern? Data Access Object abstracts data sources provides transparent access to data. Problem You want to encapsulate data access and...
Value List Handler Design Pattern? Example for Value List Handler Value List Handler Design Pattern? Value List Handler manages query execution, results caching, and results processing. Problem Many J2EE applications have clients that perform...
Transfer Object Assembler Design Pattern? Example for Transfer Object Assembler Transfer Object Assembler Design Pattern? Transfer Object Assembler obtain an application model this aggregates transfer objects from several business components. Problem Application clients frequently...
Transfer Object Design Pattern? Example for Transfer Object Transfer Object Design Pattern? Transfer Object transfers multiple data elements over tiers. Problem J2EE applications implement server-side business components, some of their methods return back data...
Composite Entity Design Pattern? Example for Composite Entity Composite Entity Design Pattern? Composite Entity represents a best practice for designing coarse-grained entity beans by grouping parent-dependent objects into a single entity bean. Problem Deciding...
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