Creating contexts
In EPL, you refer to a context by means of an object of type context. The context type is a reference type. Context objects are lightweight and creating one only creates a stub object and allocates an ID. In other words, when you create a context, you are actually creating a context reference.
Use one of the following constructors to create a context:
context(string name)
context(string name, boolean receivesInput)
The optional receivesInput Boolean flag controls whether the context is public or private:
A public context can receive external, enqueued, and routed events.
A private context cannot receive events from external components sent to the correlator. A private context can receive enqueued events from other contexts, and enqueued events and routed events from monitor instances in that context. The default is that a context is private.
The following example creates a reference, c, to a private context whose name is test:
context c:=context("test");
The following topics provide additional information:
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