Home » Author Archives: Luis Atencio

Author Archives: Luis Atencio

Luis Atencio

Notes on Continuous Delivery – Configuration Management

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Overview I will be continuing the topic on Continuous Delivery which began in my previous post: Notes on Continuous Integration; this time we will start looking at the first and most important step, Configuration Management. In the words of the authors (resource below): Configuration Management refers to the process by which all artifacts … and the relationships between them, are ...

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Notes on Continuous Delivery

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Overview In the rapid changing software world of today, companies and individuals have come up with many methods in order to minimize the time to market gap, i.e the time it takes for your idea to materialize in production. Specially in the very competitive world of mobile and web applications. The success of many companies and individuals have a temporal ...

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Fluent Object Creation

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Many posts have been written on this subject (overwhelmingly many) but I just wanted to contribute my two-cents and write a short post about how I use the Fluent Object Creation pattern or object builders in Java to instantiate Value Objects. Value Objects are abstractions that are defined by their state (value) rather than their address in memory. Examples of ...

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Google Protocol Buffers in Java

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Overview Protocol buffers is an open source encoding mechanism for structured data. Developed at Google, it was designed to be language/platform neutral and extensible. In this post, my aim is to cover the basic use of protocol buffers in the context of the Java platform. Protobuffs are faster and simpler than XML and more compact than JSON. Currently, there is ...

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Google AppEngine: Task Queues API

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Task Queues com.google.appengine.api.taskqueue With Task Queues a user can initiate a request to have applications perform work outside of this request; they are a powerful tool for background work. Furthermore, you can organize work into small, discrete units (tasks). The application then inserts these tasks into one or more queues based on the queue’s configuration and processes them in FIFO ...

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Multitenancy in Google AppEngine (GAE)

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Multitenancy is a topic that has been discussed for many years, and there are many excellent references that readily available, so I will just present a brief introduction. Multitenancy is a software architecture where a single instance of the software runs on a server, serving multiple client organizations (tenants). With a multitenant architecture, an application can be designed to virtually ...

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Measuring Code Complexity

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Lately, development managers have put a lot of interest in measuring code quality. Therefore, things like code reviews and analysis tools have become very popular at identifying “Technical Debt” early. Several tools exist for Java: Sonar, JavaNCSS, Eclipse plugins; as well as other languages: Visual Studio Code Analysis, PHPDepend, among others. What is Technical Debt? From the Sonar site, technical ...

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Java Pretty Good Privacy (PGP)

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Public-Key Encryption This post talks about PGP or “Pretty Good Privacy.” PGP is a hybrid implementation of conventional cryptography as well as public key encryption. Before going into the details of PGP, let’s talk a little about public-key encryption. Like any other cryptographic technology, public-key encryption solves the problem of transmitting secure data over an insecure medium; namely, the internet. ...

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Google App Engine Java Capabilities and Namespaces API

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Capabilities API With the Capabilities API, your application can detect outages and scheduled downtime for specific API capabilities. You can use this API to reduce downtime in your application by detecting when a capability is unavailable and then bypassing it. How do we handle this, what’s the tradeoff? 1. Elegantly: create an aspect that cross cuts all data store writes, ...

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