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Open Client Introduction and Programming
Programming Concepts : Understanding proxy and Web service object methods
 

Understanding proxy and Web service object methods

Proxy objects provide methods that allow you to manage proxy objects, create other proxy objects, and access AppServer procedures. ProxyGen generates proxy objects for Java and .NET. The actual proxies for a SOAP Web service typically are generated by Web service client tools that use the Web service WSDL file.
Proxy objects support four types of methods you can call from an Open Client application:
*Connection methods — Establishes a connection to an AppServer.
For more information about connecting to an AppServer, see Connectingto an AppServer. For more information about establishing a connection for a specific type of Open Client, see OpenEdge Development: Java Open Clients, OpenEdge Development: .NET Open Clients, or OpenEdge Development: Web Services.
*Common methods — Manages a proxy object and its AppServer connection. The common methods available depend on the client type. For details, see OpenEdge Development: Java Open Clients, OpenEdge Development: .NET Open Clients, or OpenEdge Development: Web Services.
*Class factory methods — Allows you to create SubAppObjects and ProcObjects. Executing a SubAppObject class factory method does not access the AppServer. If a ProcObject encapsulates a persistent procedure, the class factory method executes the corresponding persistent procedure on the AppServer. If a ProcObject encapsulates a single-run or singleton procedure, the class factory method does not execute the corresponding procedure. The single-run or singleton procedure will only be instantiated on the AppServer when one of its internal procedures or user-defined functions is called.
ProxyGen generates class factory methods using standard naming conventions for each type of Open Client. For more information, see Generating Proxies and Web Service Definitions.
For Java Open Clients, a built-in class factory method also allows you to create a predefined ProcObject, SDOResultSet, for a given SmartDataObject procedure file. For more information, see OpenEdge Development: Java Open Clients.
*Remote ABL methods — Invokes non-persistent procedures, internal procedures, and user-defined functions on the AppServer. For more information, see Remote ABLmethods.
The following table shows which types of methods are available for each type of proxy object.
Table 8. Types of methods available for different proxy objects
Type of method
AppObject
SbAppObject
ProcObject
Connection
X
–
–
Common
X
X
X
Class factory:
*SubAppObject class factory
*ProcObject class factory
*SDOResultSet class factory
X
X
X
-
X
X
-
-
-
Remote ABL
X
X
X
* Remote ABL methods