Exception handling in event-driven systems like Mule can sometimes be a challenge because there are usually many more things happening at once, In this blog I will show you how to implement some common error handling patterns in Mule. We are going to cover the following use cases: Route a message before exception through an […]
Front-ending Apache Tomcat with Apache Web Server or IIS is sometimes thought to improve performance. However, performance of Tomcat standalone has already been known to be very good. So why add IIS or Apache web server in front of it? – the answer is scalability and maintenance. Front-ending Tomcat with such web servers allows you […]
Jasypt is an open source Java library which provides basic encryption capabilities using a high-level API. This library can be used with Mule to avoid clear text passwords for connectors and endpoints.First, download the latest Jasypt distribution, unpack it and copy icu4j and jasypt jars to MULE_HOME/lib/user directory. Then add the following snippet to your Mule […]
Working with web APIs, local APIs and different data formats and structures is too damn hard. You have to write painful verbose code to: Query Web APIs and work with the data Enrich and join data from external services with local services Compose RESTful services from existing services Version services and data formats Merge data […]
When an issue arises in production it can be quite daunting to reproduce it in a test environment. Ideally one debugs the live application. But logs don’t tell the whole story. And a severe issue may require the application be taken down. How can it be stopped and debugged at the same time? With Mule […]
A week ago, we hosted a webinar on making the move to Mule 3.1. The goal was to introduce the new capabilities in Mule 3 and demonstrate the benefit they offer when working with Mule. More importantly we gave valuable tips on how to migrate your applications from Mule 2 to Mule 3. If you […]
There is no shortage of well-known reasons for wanting to migrate your Java EE web application to open source Tomcat. But without development experience with both your current Java EE application server as well as with Tomcat, it isn’t clear what you must change in your Java EE application to get it to run properly […]
In my last blog post I showed a simple flow to retrieve an RSS feed periodically, split it and send each RSS entry via eMail. The solution has one major drawback, though: once the Mule application is restarted, Mule has forgotten which feed entries have already been sent. The RSS feed is retrieved again and […]
I read a couple of RSS feeds regularly. Unfortunately, I work across a couple of machines: my laptop, the machine in the office, my wife’s laptop. This rules out using a local RSS reader as I’d have to manage the redundant subscriptions let alone I’d have to remember which feed entries I have already read […]
Mule 3.1 introduces a very useful new <logger> element that makes it easy to inspect the content and properties of your messages in Mule while building or debugging a flow. It’s also perfect for logging errors, info messages etc. Mule has always supported logging with the <log-component> but while working with the new orchestration capabilities […]