[This topic is pre-release documentation and is subject to change in future releases. Blank topics are included as placeholders.]

An event expression was Started and supplies the callback to use when matching events appear. Returns the callback to use to Stop the event expression.

Namespace: net.esper.pattern
Assembly:   NEsper (in NEsper.dll)

Syntax

Visual Basic (Declaration)
Function Start ( _
	matchCallback As PatternMatchCallback, _
	context As PatternContext _
) As StopCallback
C#
StopCallback Start (
	PatternMatchCallback matchCallback,
	PatternContext context
)
Visual C++
StopCallback^ Start (
	PatternMatchCallback^ matchCallback, 
	PatternContext^ context
)

Parameters

matchCallback
net.esper.pattern.PatternMatchCallback
must be supplied to indicate what to call when the expression turns true
context
net.esper.pattern.PatternContext
is the context for handles to services required for evaluation.

Return Value

a callback to Stop the expression again