Welcome!

Microservices Expo Authors: Christoph Schell, Elizabeth White, Matt Brickey, Pat Romanski, Liz McMillan

Related Topics: Microservices Expo

Microservices Expo: Blog Feed Post

Grafting Mule Endpoints

As an integration framework, Mule ESB exposes all its moving parts

In Mule ESB, outbound dispatching to a destination whose address is known at runtime only is a pretty trivial endeavor. A less frequent practice consists in programmatically defining inbound service endpoints.


I recently had to do such thing for a little side project I'm running where Mule is used as a frontal bus and load throttler in front of a R nodes exposed over RMI. The goal was to have a non-fixed number of file inbound endpoints defined in a simple properties file and declare them on a particular service during the initialization sequence of Mule.

As an integration framework, Mule ESB exposes all its moving parts and lets you configure them easily with its Spring-powered XML DSL: that's all we need to achieve the above goal.

Let's first look at the resulting service configuration:


As you can see the inbound router doesn't have any endpoint configured on it. This is where we will programmatically graft the file endpoints configured in an external properties file.

Before digging into the code used for this grafting operation, let's look at how the grafter itself is configured:


Unsurprisingly, we use a Spring configured POJO to perform the endpoints generation. Notice how the service and the file connector are referenced: instead of using names I'm directly referencing Mule configuration elements. Because Spring is used consistently being the scene, this kind of cross referencing is possible and the key to many advanced tricks!

Now take a deep breath and take a look at the code in charge of grafting the endpoints to the target service:


The important things to pay attention to are the following:
  • The class implements MuleContextAware in order to receive an instance of the MuleContext, which is the key to the gate of Mule's innermosts. Some might consider fetching this class from the connector object that gets injected in this class too: I personally find this less desirable for design reasons that I'll let Demeter explain.
  • The endpoint is bound to the desired connector by passing its name in the URI used to create it. This allows picking up the right connector, which is compulsory for any Mule configuration with more than one instance of a particular connector (file connectors in this case).
  • Endpoint specific configuration parameters, like moveToDirectory, are configured as extra URI parameters. You can also add other parameters, as key/value pairs: they will be automatically added to the message properties dispatched from this endpoint.
And voila, though you may never have to do this kind of things in your Mule ESB projects, you've gained some deeper experience into what a reasonably skilled gardener can do with this powerful platform.

Read the original blog entry...

More Stories By David Dossot

David Dossot has worked as a software engineer and architect for more than 14 years. He is a co-author of Mule in Action and is the project despot of the JCR Transport and a member of the Mule Community Committee. He is the project lead of NxBRE, an open source business rules engine for the .NET platform (selected for O'Reilly's Windows Developer Power Tools). He is also a judge for the Jolt Product Excellence Awards and has written several articles for SD Magazine. He holds a Production Systems Engineering Diploma from ESSTIN.

@MicroservicesExpo Stories
From personal care products to groceries and movies on demand, cloud-based subscriptions are fulfilling the needs of consumers across an array of market sectors. Nowhere is this shift to subscription services more evident than in the technology sector. By adopting an Everything-as-a-Service (XaaS) delivery model, companies are able to tailor their computing environments to shape the experiences they want for customers as well as their workforce.
If you read a lot of business and technology publications, you might think public clouds are universally preferred over all other cloud options. To be sure, the numbers posted by Amazon Web Services (AWS) and Microsoft’s Azure platform are nothing short of impressive. Statistics reveal that public clouds are growing faster than private clouds and analysts at IDC predict that public cloud growth will be 3 times that of private clouds by 2019.
"Outscale was founded in 2010, is based in France, is a strategic partner to Dassault Systémes and has done quite a bit of work with divisions of Dassault," explained Jackie Funk, Digital Marketing exec at Outscale, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"DivvyCloud as a company set out to help customers automate solutions to the most common cloud problems," noted Jeremy Snyder, VP of Business Development at DivvyCloud, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"We focus on SAP workloads because they are among the most powerful but somewhat challenging workloads out there to take into public cloud," explained Swen Conrad, CEO of Ocean9, Inc., in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"As we've gone out into the public cloud we've seen that over time we may have lost a few things - we've lost control, we've given up cost to a certain extent, and then security, flexibility," explained Steve Conner, VP of Sales at Cloudistics,in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"Peak 10 is a hybrid infrastructure provider across the nation. We are in the thick of things when it comes to hybrid IT," explained , Chief Technology Officer at Peak 10, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"I think DevOps is now a rambunctious teenager – it’s starting to get a mind of its own, wanting to get its own things but it still needs some adult supervision," explained Thomas Hooker, VP of marketing at CollabNet, in this SYS-CON.tv interview at DevOps Summit at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"I will be talking about ChatOps and ChatOps as a way to solve some problems in the DevOps space," explained Himanshu Chhetri, CTO of Addteq, in this SYS-CON.tv interview at @DevOpsSummit at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
Your homes and cars can be automated and self-serviced. Why can't your storage? From simply asking questions to analyze and troubleshoot your infrastructure, to provisioning storage with snapshots, recovery and replication, your wildest sci-fi dream has come true. In his session at @DevOpsSummit at 20th Cloud Expo, Dan Florea, Director of Product Management at Tintri, provided a ChatOps demo where you can talk to your storage and manage it from anywhere, through Slack and similar services with...
If you are thinking about moving applications off a mainframe and over to open systems and the cloud, consider these guidelines to prioritize what to move and what to eliminate. On the surface, mainframe architecture seems relatively simple: A centrally located computer processes data through an input/output subsystem and stores its computations in memory. At the other end of the mainframe are printers and terminals that communicate with the mainframe through protocols. For all of its apparen...
DevOps at Cloud Expo, taking place October 31 - November 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 21st Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The widespread success of cloud computing is driving the DevOps revolution in enterprise IT. Now as never before, development teams must communicate and collaborate in a dynamic, 24/7/365 environment. There is no time to w...
There is a huge demand for responsive, real-time mobile and web experiences, but current architectural patterns do not easily accommodate applications that respond to events in real time. Common solutions using message queues or HTTP long-polling quickly lead to resiliency, scalability and development velocity challenges. In his session at 21st Cloud Expo, Ryland Degnan, a Senior Software Engineer on the Netflix Edge Platform team, will discuss how by leveraging a reactive stream-based protocol,...
"At the keynote this morning we spoke about the value proposition of Nutanix, of having a DevOps culture and a mindset, and the business outcomes of achieving agility and scale, which everybody here is trying to accomplish," noted Mark Lavi, DevOps Solution Architect at Nutanix, in this SYS-CON.tv interview at @DevOpsSummit at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
For over a decade, Application Programming Interface or APIs have been used to exchange data between multiple platforms. From social media to news and media sites, most websites depend on APIs to provide a dynamic and real-time digital experience. APIs have made its way into almost every device and service available today and it continues to spur innovations in every field of technology. There are multiple programming languages used to build and run applications in the online world. And just li...
Data reduction delivers compelling cost reduction that substantially improves the business case in every cloud deployment model. No matter which cloud approach you choose, the cost savings benefits from data reduction should not be ignored and must be a component of your cloud strategy. IT professionals are finding that the future of IT infrastructure lies in the cloud. Data reduction technologies enable clouds — public, private, and hybrid — to deliver business agility and elasticity at the lo...
DevOps is often described as a combination of technology and culture. Without both, DevOps isn't complete. However, applying the culture to outdated technology is a recipe for disaster; as response times grow and connections between teams are delayed by technology, the culture will die. A Nutanix Enterprise Cloud has many benefits that provide the needed base for a true DevOps paradigm. In their Day 3 Keynote at 20th Cloud Expo, Chris Brown, a Solutions Marketing Manager at Nutanix, and Mark Lav...
"NetApp's vision is how we help organizations manage data - delivering the right data in the right place, in the right time, to the people who need it, and doing it agnostic to what the platform is," explained Josh Atwell, Developer Advocate for NetApp, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
Five years ago development was seen as a dead-end career, now it’s anything but – with an explosion in mobile and IoT initiatives increasing the demand for skilled engineers. But apart from having a ready supply of great coders, what constitutes true ‘DevOps Royalty’? It’ll be the ability to craft resilient architectures, supportability, security everywhere across the software lifecycle. In his keynote at @DevOpsSummit at 20th Cloud Expo, Jeffrey Scheaffer, GM and SVP, Continuous Delivery Busine...
"We do one of the best file systems in the world. We learned how to deal with Big Data many years ago and we implemented this knowledge into our software," explained Jakub Ratajczak, Business Development Manager at MooseFS, in this SYS-CON.tv interview at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.