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The Top 10 Productivity Booster Techs for Programmers

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This is the list we’ve all been waiting for. The top 10 productivity booster techs for programmers that – once you’ve started using them – you can never do without them any longer. Here it is:                 Git Before, there were various version control systems. Better ones, worse ones. But somehow they all ...

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ActiveMQ – Network of Brokers Explained – Part 3

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Now that we have understood the basics of ActiveMQ network connector in part 1 and part 2 of this blog series, in this part 3, we will examine how ActiveMQ load balances consumers which connect to a network of brokers. Introduction Concurrent consumers are used when messages in a queue can be processed out of order and usually to improve ...

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ActiveMQ – Network of Brokers Explained – Part 2

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In this blog we will see how duplex network connectors work. In the previous part 1 we created a network connector from broker-1 and broker-2. We were able to see how messages for queue “foo.bar” on broker-1 were forwarded queue “foo.bar” on broker-2 when there was a consumer on broker-2 for queue “foo.bar” Let’s try doing the reverse by producing messages into broker-2’s queue ...

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Structural contingency (part one)

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Order, in mathematics, matters. Take two functions, f and g, and compose them, thus applying them to an argument as either f(g(x)) or g(f(x)). In general, it cannot be assumed that f(g(x)) = g(f(x)). If f(x) = 2x and g(x) = x 2, for example, then f(g(3)) = 18 but g(f(3)) = 36. The order in which the functions apply ...

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Three Reasons Why We Should Not Use Inheritance In Our Tests

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When we write automated tests (either unit or integration tests) for our application, we should notice pretty soon that Many test cases use the same configuration which creates duplicate code. Building objects used in our tests creates duplicates code. Writing assertions creates duplicate code. The first thing that comes to mind is to eliminate the duplicate code. As we know, ...

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Introduction to Backbone.js

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Introduction The web application development process has been evolving over the years. In the beginning web applications were just static HTML pages, which required programmers to change the code in order to change the content. Later, in web 2.0, server side programming languages were added to generate HTML pages dynamically based on user input and data stored in database. Web ...

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Managers and Individual Contributors in Code

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I’m lucky to work for a company that makes it possible to have a good technical career, so that I don’t have to become a manager just to get more money. I like being an individual contributor because it gives me a sense of accomplishment when I get stuff done myself.   Anyway, I believe the distinction between manager and ...

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Design Your Agile Project, Part 4

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If you are thinking of agile as part of a program, each team has to have its own approach to agile. Why? Because each team has its own risks and problems. You don’t need to standardize agile for anyone. If you treat people as if they are adults and explain the principles that you want (working software all the time ...

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The anatomy of Connection Pooling

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Introduction All projects I’ve been working on have used database connection pooling and that’s for very good reasons. Sometimes we might forget why we are employing one design pattern or a particular technology, so it’s worth stepping back and reason on it. Every technology or technological decision has both upsides and downsides, and if you can’t see any drawback you ...

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Reporting Metrics to Apache Kafka and Monitoring with Consumers

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Apache Kafka has been used for some time now by organizations to consume not only all of the data within its infrastructure from an application perspective but also the server statistics of the running applications and infrastructure.  Apache Kafka is great for this. Coda Hale’s metrics’s has become a leading way to instrument your JVM applications capturing what the application is doing ...

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