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Cloud based deployment pipeline

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Cloud based development tools are continuing to improve thanks to the power of new browser technologies and cloud services such as github and Amazon Web Services. The full deployment life-cycle can now be based entirely in the cloud by using various SaaS and PaaS offerings. As each service offered is provided by a different entity the challenge is to integrated ...

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Multi-tier application + database deadlock or why databases aren’t queues (part1)

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Databases aren’t queues. And despite the ubiquitous presence of queuing technology out there (ActiveMQ, MSMQ, MSSQL Service Broker, Oracle Advanced Queuing) there are plenty of times when we ask our relational brethren to pretend to be queues.  This is the story of one such folly, and along the way, we’ll delve into some interesting sub-plots of deadlocks, lock escalation, execution ...

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Too Many Parameters in Java Methods, Part 8: Tooling

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The first seven posts of my series of dealing with too many parameters expected in Java methods focused on alternative approaches to reduce the number of parameters a method or constructor expects. In this eighth post in the series, I look at tools that help identify cases where too many parameters may exist and tools that help deal with that ...

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Announcing EAXY: Making XML easier in Java

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XML libraries in Java is a minefield. The amount of code required to manipulate and read XML is staggering, the risk of getting class path problems with different libraries is substantial and the handling of namespaces opens for a lot of confusion and errors. The worst thing is that the situation doesn’t seem to improve. A colleague made me aware ...

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Hibernate Facts: Equals and HashCode

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Every Java object inherits the equals and hashCode methods, yet they are useful only for Value objects, being of no use for stateless behavior oriented objects. While comparing references using the “==” operator is straight forward, for object equality things are a little bit more complicated. Since you are responsible for telling what equality means for a particular object type, ...

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Migrating from a Subversion repository to GitHub

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One of greatest attractions of GitHub is the community and the tooling that allows this community to share code. Each contributor can clone the repository, make their changes and then send you a pull request. As the project maintainer your job is now a whole lot easier and more manageable. No more patch files to worry about. Follow the recipe ...

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Hibernate Facts: Multi level fetching

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It’s quite common to retrieve a root entity along with its children associations on multiple levels. In our example we need to load a Forest with its Trees and Branches and Leaves, and we will try to see have Hibernate behaves for three collection types: Sets, Indexed Lists, and Bags. This is how our class hierarchy looks like:     ...

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Why Your Resume is 10 Pages

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Even though there are hundreds of articles professing the beauty and efficiency of the one page résumé, not a day passes where I don’t see a five pager. The issue of length has even surfaced amongst college undergrads applying for internships, who seem to have increasing difficulty trimming their list of accomplishments and experiences into a single page (really). This ...

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RESTful Web Services with Java

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REST stands for REpresentational State Transfer, was first introduced by Roy Fielding in his thesis “Architectural Styles and the Design of Network-based Software Architectures” in year 2000. REST is an architectural style. HTTP is a protocol which contains the set of REST architectural constraints. REST fundamentals     Everything in REST is considered as a resource. Every resource is identified ...

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