IAffiniumExternalCallout interface
The ExternalCallout API is contained in the interface IAffiniumExternalCallout. You must implement the IAffiniumExternalCallout interface to use the EXTERNALCALLOUT macro.
The class that implements the IAffiniumExternalCallout should have a constructor with which it can be initialized by the runtime server.
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If there are no constructors in the class, the Java™ compiler creates a default constructor and this is sufficient.
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If there are constructors with arguments, a public constructor with no argument should be provided, which will be used by the runtime server.
When developing your external callout, remember the following:
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Each expression evaluation with an external callout creates a new instance of the class. You must manage thread safety issues for static members in the class.
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If your external callout uses system resources, such as files or a database connection, you must manage the connections. The runtime server does not have a facility to clean up connections automatically.
You must compile your implementation against interact_externalcallout.jar located in the lib directory of your IBM® Interact runtime environment installation.
IAffiniumExternalCallout enables the runtime server to request data from your Java™ class. The interface consists of four methods:
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getNumberOfArguments
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getValue
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initialize
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shutdown
To add a web service for use with EXTERNALCALLOUT
getNumberOfArguments
getValue
initialize
shutdown
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