MEL Details Session 2

MEL Details Session 2

Transcript

1. Abhishek Jain
2.  Use of MEL  Access Object Level Properties  Access Method Level Properties  Operators  Operators Evaluation  Data Extraction  Topic for next session  Reference
4. -In the previous slide example, MEL is calling the inbound property from the mule message for the value of “Host” -All properties are stored in Map -There are two ways to access them -#[message.getInboundProperty(‘host’)] -#[message.InboundProperties[‘host’]] -In order to access Mule Registry, use below expression -#[app.registry]
5. If payload is of type java object then properties can be accessed directly by calling the fieldname from payload. For example, payload is of CustomerDetails object and want to access lastname then use the below expression #[payload.lastName]
6. If payload is of type java object then methods can also be triggered using MEL For example, payload is of CustomerDetails object and want to trigger getFirstName method then use below expressiono #[payload.getFirstName()]
7. + (Used for addition/Concatanation) - / * % (Reminder Operator) #[‘hello’ + ‘John’] => Hello John
8. Standard Comparison Operators: ==, !=, >, <, >=, =< Contains – Similar to like Operator Is- Checks the type of an object Mainly used in Choice Router
9.  #[xpath(‘expression’)]  #[regex(‘expression’)]
10. List/Maps in MEL
11.  www.mulesoft.com  Mule in Action