condition

Spring Expression Language (SpEL) expression used for making the cache put operation conditional.

Default is "", meaning the method result is always cached.

The SpEL expression evaluates against a dedicated context that provides the following meta-data:

• #root.method, #root.target, and #root.caches for references to the java.lang.reflect.Method, target object, and affected cache(s) respectively.
• Shortcuts for the method name (#root.methodName) and target class (#root.targetClass) are also available.
• Method arguments can be accessed by index. For instance the second argument can be accessed via #root.args[1], #p1 or #a1. Arguments can also be accessed by name if that information is available.