Remoting patterns

Pattern: Invoker
• Context:
• A requestor sends a remote invocation for a remote object to a server
• Problem:
• Somehow the targeted remote object on the server has to be reached
• Simplest solution: remote object is addressed over the network directly
• Solution:
• Large number of object → not enough network endpoints
• Remote object would have to deal with network connections,
receiving and demarshalling messages, etc.
• Invoker(s) accept(s) invocations from requestors
• Invoker reads the request and demarshalls it
• Looks up the correct local object & operation and
• Performs the invocation on the targeted remote object
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Uwe Zdun, Markus Voelter, Michael Kircher - Remoting Patterns.