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Using an Embedded Tomcat with Maven tomcat plugin

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When developing a java web application using the Eclipse WTP, we need to have an installation of tomcat in the machine in order to execute the application. If you are using Maven on your project, you can use the tomcat plugin to run an embedded tomcat installation and test the application. It is very simple as you can see below. ...

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Compiling Lambda Expressions: Scala vs. Java 8

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Lambda expressions have taken the programming world by storm in the last few years. Most modern languages have adopted them as a fundamental part of functional programming. JVM based languages such as Scala, Groovy and Clojure have integrated them as key part of the language. And now, Java 8 is (finally) joining in on the fun. What’s interesting about Lambda ...

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Testing Spring components with Mockito

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Be able to unit test your spring components without the need of loading the full spring-context with its ad-hoc test configurations it is ,in my opinion, a great advantage because it’s clean, easy to maintain, faster to write, smooth to alter. A way to achieve this goal is to use Mockito and tell him to replace the @Autowired components in ...

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How to estimate memory consumption?

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This story goes back at least a decade, when I was first approached by a PHB with a question “How big servers are we going to need to buy for our production deployment”. The new and shiny system we have been building was nine months from production rollout and apparently the company had promised to deliver the whole solution, including ...

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I Don’t Like Scala

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Yes, it is my opinion, and yes, it might seem like a hate-post. But I’ll try to address the issues I have with Scala and its surroundings. I have used Scala in a single, relatively small project (currently working in production), so I guess I’m somewhere between “n00b” and “intermediate”.               there are multiple ...

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Specifying Gradle Build Properties

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Properties are a valuable tool for easily customizing Gradle builds and the Gradle environment. I demonstrate some of these approaches for specifying properties used in a Gradle build in this post. Gradle supports both project properties and system properties. The main difference between the two that is of interest in this post is how each is accessed. Project properties are ...

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Detecting and Fixing XSS using OWASP tools

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Much have been written about XSS vulnerabilities scanning. In this article we will try to go a little further and show how to fix them. To illustrate the whole process, going from initial detection to providing a fix, we will use a very simple app consisting of two JSP pages: one is a payment form for credit card transactions and ...

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Primefaces DataTable Lazy Loading with pagination, filtering and sorting using JPA Criteria, @ViewScoped

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Primefaces datatable lazy pagination works, but I was really frustrated after searching for a full example using Criteria in the web. So I’ve mixed solutions from http://stackoverflow.com/questions/13972193/how-to-query-data-for-primefaces-datatable-with-lazy-loading-and-pagination http://www.primefaces.org/showcase/ui/datatableLazy.jsf http://www.javacodegeeks.com/2012/04/lazy-jsf-primefaces-datatable.html To put all together in a complete example using:     Primefaces 4.0 TomEE 1.6.0+ Criteria JPA With: Filtering Sorting Pagination Using @ViewScoped Managed Beans So let’s go: xhtml snippet <?xml ...

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The Gradle Interface: Gradle Build Metadata

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As I’ve shown in previous posts such as “Identifying Gradle Conventions” and “Evolving Gradle Build from Ant Build: Importing Ant Build File“, significant information about a Gradle build can be gleaned by accessing Gradle’s APIs via Groovy. In this post, I look demonstrate accessing basic Gradle build details via the Gradle interface. The org.gradle.api.invocation.Gradle interface is accessible in the Gradle ...

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Java 8 Friday Goodies: Lambdas and XML

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. We have blogged a couple of times about some nice Java 8 goodies, and now we feel it’s time to start a new blog series, the… Java 8 Friday Every Friday, ...

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