com.espertech.esper.client.annotation
Annotation Type ExternalDWKey

public @interface ExternalDWKey

Annotation for defining the name of the property or the function name returning the external data window key values.

Optional Element Summary

java.lang.String	function Key generator function.
java.lang.String	property Property name acting as key.
java.lang.String[]	propertyNames Multiple property names acting as key (check for support in the documentation).

property

public abstract java.lang.String property

Property name acting as key.

Returns:

key property name

Default:

""

propertyNames

public abstract java.lang.String[] propertyNames

Multiple property names acting as key (check for support in the documentation).

Returns:

property names array

Default:

{}

function

public abstract java.lang.String function

Key generator function.

Returns:

function name

Default:

""