Mary Cochran

Mary Cochran

Recent Posts

Camel Clustered File Ingestion with JDBC and Spring

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By Mary Cochran

Reading a file is a common use for Apache Camel. From using a file to kick off a larger route to simply needing to store the file content, the ability to only read a file once is important. This is easy when you have a single server with your route deployed, but what about when you deploy your route to multiple servers. Thankfully, Camel has the concept of an Idempotent Consumer.

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Using Clustered Camel Quartz Jobs on JBoss EAP

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By Mary Cochran

Camel Quartz can be a useful component for jobs that need to run at a particular time every day. Recently on a client site, we had a need for about 15 different jobs that each created a differently formatted file and send each file to a particular destination. While this was straightforward to get setup on a single machine, once we started deploying our camel routes to multiple servers the jobs started to kick off on both machines. To resolve this issue we needed to create a job store.

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The Camel Rest DSL

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By Mary Cochran

Camel

Apache Camel is a piece of JBoss Fuse.  It is an open source integration framework with a variety of components to fit your integration needs.  Camel is a Java-based implementation of the Enterprise Integration Patterns based on a book by Gregor Hohpe and Bobby Woolf.  Camel includes components for HTTP, Files, FTP, JMS, JDBC, AWS, and much more.  While Camel can be used for many different purposes, this post will focus on the REST DSL specifically.

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Lessons learned from using IoT devices in the real world

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By Mary Cochran

As a consultant, I’ve spent a decent amount of time working on a full stack development project in the realm of IoT. Over the years, our teams have run into a lot of avoidable issues. Here are some lessons I learned from using IoT devices in industry.

I define IoT as “connecting a device to a larger system with the goal of that device providing information to the system that is then leveraged in some way”. This can range from something like a FitBit to a Tesla to a smart fridge — all of which connect and report information to a cloud or back end, making them “internet of things” devices.

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Persistence vs. Durability in Messaging. Do you know the difference?

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By Mary Cochran

Messaging is a critical aspect of integrating systems, and while there are many different messaging platforms and infrastructures, a common request is for “zero loss of messages.”  From there, the terms “Persistence” and “Durability” often get thrown around, but what do those two things really mean?

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Persistent Custom MDC Logging in Apache Camel

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By Mary Cochran

Logging is an ubiquitous need in any production quality application, and one common scenario is to log the active (logged in) username, or to log the user and order IDs for customer order event details. This is typically done to create an audit trail so that issues can be more easily traced should something go wrong, but there are any number of reasons why you might decide to create a custom log.

Mapped Diagnostic Contexts (MDCs) in Apache Camel are great for creating custom logging statements, and will easily meet our needs for these use cases.  MDC is offered by both slf4j and log4j, and is also supported by JBoss Logging. (Apache Camel is a part of the Red Hat JBoss Fuse integration platform.)

In addition, you can use something like GELF to automatically index any MDC, thus allowing them to be easily searched using ElasticSearch (logging configuration is not required for this feature), so there are a few reasons why this might be an appealing solution.

This article will demonstrate how to set up MDC to perform custom logging.

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