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Immutable Infrastructure, hotdeploys, and the JVM

Do you deploy and undeploy your JVM-based applications (regardless of JVM container/no-container) in production? ie, when you have new versions of an app or service, do you mutate the running JVM by “undeploying” and “hot deploying” the new, updated version of that app? Or, do you try to “move” a deployment of your application from one JVM to another at ...

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Apache Camel Wire Tap Examples

If you want to monitor, debug, troubleshoot messages that are flowing through the route without the bother of permanently consuming the message off the channel, then you need to use a wire tap. The wire tap acts as a recipient list that consumes messages off the input channel and publishes it to both output channels. The first would be to the actual ...

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JavaFX, Project Jigsaw and JEP 253

So Java 9 may break your code… This is particularly likely if your project uses JavaFX because many customizations and home-made controls require the use of internal APIs. With Project Jigsaw these will be unaccessible in Java 9. Fortunately, Oracle announced JEP 253 a couple of days ago. Its goal: Define public APIs for the JavaFX UI controls and CSS functionality ...

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Spring Integration Jdbc RowMapper Example


The JDBC inbound channel adapter’s basic function is to execute a SQL query, extract the data and pass the result set encapsulated in the form of a Message onto the local channels. You can read more about this in my example on JDBC Inbound Channel Adapter. The type of the payload is decided by the row-mapping strategy. The default one ...

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Apache Camel Log Component Examples

Apache Camel Log Component Examples You want to log messages to the underlying logging mechanism, use camel’s log: component. Camel uses sfl4j as the logger API and then allows you to configure the logger implementation. In this article, we will use Log4j as the actual logger mechanism. Let’s start with our examples. Dependencies You need to add: slf4j-api – SLF4J ...

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Spring lookup-method Example


When a bean has dependency on another bean, we inject the bean using the setter property or through the constructor. The getter method will return us the reference that is been set but suppose you want a new instance of the dependent bean each time you invoke the getter method, then you will probably have to follow a different approach. ...

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Centralized System and Docker Logging with ELK Stack

With Docker there was not supposed to be a need to store logs in files. We should output information to stdout/stderr and the rest will be taken care by Docker itself. When we need to inspect logs all we are supposed to do is run docker logs [CONTAINER_NAME]. With Docker and ever more popular usage of micro services, number of ...

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Designing a Disruptive Technology Strategy

Growing up, my sister Christina was always interested in architecture and I wasn’t–at all. She was constantly visiting houses, churches, and corporate buildings for fun. I thought it was the most boring thing in the world. It wasn’t until much later in life that I gained an appreciation for architecture. Only after giving in and promising to open my mind ...

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The Product Strategy Defined

Summary Creating a successful product requires attention to the details, from getting the user interaction and the visual design right to providing the right functionality and using the right technologies. With so much focus on the nitty-gritty, it’s easy to no longer see the wood for the trees. This is where the product strategy comes in. It helps you manage ...

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