I have a yaml properties file stored in a S3 bucket. In Mule4 I can read this file using S3 connector. I need to use properties defined in this file (for dynamic values reading and using it in Mule4) in DB connectors. I am not able to create properties from this file such that I can use them as ${dbUser} in mule configuration or flow as an example. Any guidance on how can I accomplish this?
You will not be able to use the S3 connector to do that. The connector can read the file in an operation at execution time, but properties placeholders, like ${dbUser} have to be defined earlier, at deployment time.
You might be able to to read the value into a variable (for example: #[vars.dbUser]) and use the variable in the database connector configuration. That is called a dynamic configuration, because it is evaluated dynamically at execution time.