This short tutorial discusses how the objects in a Mule event change when an external source is called through the flow. A Mule event consists of Mule message, attributes, payload and variables. The tutorial is explained with parent and child flow respectively.
Remember those old days, when you need to add the correlationId as a prefix in each and every log messages in Mule 3 just to keep track of an individual HTTP request in your Mule API? Those days are just gone. So does the pain of extra Muley works. Because it is automatically done for you by Mule 4.
Once upon a time, there was a Microsoft SQL Server named DB007 running in a data center in an enterprise organization in Toronto. DB007 was sad. It doesn’t get much attention due to the high demand in the SAAS based database solution. Everyone is excited talking about the cloud-based solution, NoSQL, data lakes, etc. However very few people considering storing data into DB007.
We will need appropriate tools and proper environment set up to work with MuleSoft. This writing describes the components and sets up the environment needed to build and run the program.
- JDK (Java Development Kit) version 8
- Anypoint Studio
JDK (Java Development Kit)
JDK is a package of tools which is needed to develop java-based software programs. Oracle provides free JDK to download. We will have an additional tutorial for downloading and installing JDK. For interested readers here is the link to install JDK. We will use version 8 in our environment.
In MuleSoft we will use the Anypoint Platform and write RAML (RESTful API Modeling Language) code to design and manage the RESTful APIs. It requires permission from the owner organization to use the Anypoint Platform. Or anyone can have a free 30 days trial account to access it.
As the name denotes, it is a platform to perform various activities. This is the platform which can connect any application, API, and data source to all sort of devices. Anypoint Platform is active both in the cloud hub and on-premise.
Sometimes to work with MuleSoft Anypoint Studio, we have payload with fields contain a null value.
"id": 001, "firstName": "John", "lastName": null, "phoneNumber": null, "email": "email@example.com"
Plekton Labs Inc. is happy to sponsor and organize the webinar – Introduction to the Salsforce.com Platform
We are very excited to announce that we are going to arrange a webinar as part of our regular community workshop, on December 19, 2019 from 6:00 pm to 7:00 pm.
Plekton Labs Inc.
Speaker: Arijit Roy, Solution Architect
A webinar could be the best way to reach your target group. One can have a direct contact and interaction to the resource person and the target group without spending travelling time and money. Plekton Labs designed the community workshops and events to develop talents, transform the mind set by bringing the tech leaders and the community together.
Why you should join!
If you have already created a global error handler plugin (if not then click here to know how to create one), then you definitely want to share that among all different mule-applications. This article gives an example of how to install a global error handler plugin in a mule-application.
As a recap, our error response builder is a mule plugin which is responsible for managing error response and handling generic errors. This plugin will be imported in each working Mule project and invoke the generic error handling flow available in it.
This article assumes that you have maven installed on your local computer.
- JDK (tested in 1.8.0_211).
- Maven (tested in 3.3.9).
- Mule runtime version 4 or above.
- Anypoint Studio version 7 or above.
Mulesoft redesigned the whole error handling mechanism and components in Mule 4 (some key difference here). In Mule 3, there was a simple way to reuse a flow across multiple applications by putting into a separate mule-application and package that as jar. Jar can be added as a dependency in any mule-application. An important application of this was having a reusable error response builder flow that possibly analyzes the exception and generates client friendly error response with the proper error code and error message for the REST API client.
However, Mule 4 does it a slightly different way. For reusing a flow, we need to create a Mule plugin and put the flow into that plugin. Any mule-application can add that plugin as maven dependency and reusable flow can be shared.
This article gives a step-by-step guide to generate that plugin in Mule 4 and installing into any mule-application.