In the previous article, I have described how to create a custom Mule Domain Project. This time we will try to consume that. In other words, we will attach the Mule application to our previously defined domain. Link Just to recap. Let us see how our domain looks like. We have a mydomain project with…
Mule 4.x
Practical overview of sharing global configuration using Domain Project
In the previous article, I have described how to share common functionality encapsulated in the flows and subflows. This time I will focus on the common configurations that should be shared among our applications, especially in the context of on-prem deployment. Mule has a domain project application that can solve that. You will see how…
How to share reusable code in MuleSoft
From my point of view, reusability is extremely important to deliver functionality quicker and in a more consistent manner. I wrote about reusing DataWeave code in Modules, also reusing RAML using API Fragments. Today I focus on sharing some common logic, encapsulated within the (private) flow or subflow. In Mule ESB we have a couple…
DataWeave Modules, new way to introduce reusability
It is always desirable to reuse as much code as possible. We can do the same regarding DataWeave transformations and custom functions. In this article, I will describe how to reuse code in the newest DataWeave using modules. For those working with DataWeave 1.0, I will describe how to reuse code with readUrl function. DataWeave…
Remove empty JSON objects from payload using DataWeave function
During transformation to JSON, we often do not want null properties. It is easy to remove them, by just using the skipNullOn attribute. However, for empty objects, it is not that trivial, especially when you have to deal with many such cases within one transformation. In this article, I will show you how you can…
Enrichment Pattern in Mule 4
Content Enricher is definitely a useful integration pattern. It allows easily enrich message content with new data gathered from external resources. In the vast majority of Mule’s apps, I have been using the Message Enricher Component. Today I will point main differences in Mule 3.x and Mule 4.x regarding this element. Content Enricher pattern When…
Huge number in exponential notation in DataWeave. How to convert it?
In the last article, I have described a nuisance with casting to an integer value. This time we will look at huge numbers and their formatting. In addition, I will mention scientific notation. All these topics are around the number format used by the DataWeave engine. So let’s see what the problem looks like. Problem…
Error Handling simplified – Try Scope
Errors occur all the time. All you can do is implement error handling. In this article, I will describe how to use the introduced layer of abstraction in the exceptions area. Before Mule 4, developers only could access raw Java exceptions as Mule is a Java-based ESB. This lead to a situation where you, as…
Using filter selector in DataWeave to easily extract data from array
There are times when you need to get one particular element from an array, but not based on the index. This item needs to fulfill some requirements like equality and so on. In order to perform that task filter selector ‘?‘ was introduced. This is applicable for both DataWeave 1 and 2. Filter selector syntax…
How can we call Java code using the DataWeave language?
I have already presented how to call Java code using messages processors with the newest Java Module for Mule 4.x. For earlier mule’s version Entry Point Resolvers were used to invoke custom Java code. However for scenarios when we would like to use custom code in DataWeave, for transformations, another approach is needed. Approach presented in this article will be more concise comparing to using message processors. It was highly extended comparing to possibilities of Mule 3.x version. Mule 3 allowed to invoke static methods. In contract Mule 4 not only permits to call static methods but also instantiate classes and access its instance attributes.