4.6. Javabean Cartridge Data Bindings

jb:value: use this to bind data values from the source message event stream to the target bean.

jb:wiring: use this to "plug" another bean instance from the bean context into a bean property on the target bean. You can use this configuration to construct an object graph (as opposed to a loose collection of Java object instances). You can plug beans in based on their beanId, their Java class type or their annotation.

jb:expression: use this configuration to bind a value calculated from an expression (in the MVEL language). A simple example is the ability to bind an order item total value to an OrderItem bean (based on the result of an expression that calculates price * quantity). Use the execOnElement attribute expression to define the element on which the expression is to be evaluated and to which the result will be bound. (If you do not define it, the expression is executed based on the value of the parent jb:bean createOnElement.) The value of the targeted element is available in the expression as a string variable under the name _VALUE (note the underscore).