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Knowledge Representation and Reasoning with Graph Databases

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A graph database and its ecosystem of technologies can yield elegant, efficient solutions to problems in knowledge representation and reasoning. To get a taste of this argument, we must first understand what a graph is. A graph is a data structure. There are numerous types of graph data structures, but for the purpose of this post, we will focus on ...

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Spring Security Misconfiguration

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I recently saw Mike Wienser’s SpringOne2GX talk about Application Security Pitfalls. It is very informative and worth watching if you are using Spring’s stack on servlet container. It reminded me one serious Spring Security Misconfiguration I was facing once. Going to explain it on Spring’s Guide Project called Securing a Web Application. This project uses Spring Boot, Spring Integration and ...

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Builder pattern using Java 8

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I work in an environment where a great deal of our day to day scripting tasks occur through calling remote services as opposed to working with the database. For a lot of scripting tasks I’ve often used Groovy and one of the most useful features of Groovy specifically for that task has been it’s built in fluent Builders. Now Groovy ...

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Introduction : How to save data in your Android application

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This is the first post in a series explaining the various ways to save data and application state in an Android application. There are many mechanisms in the Android SDK that can be used to save data, and it is something confusing to decide which one to use and when the operation should be triggered. One of the first and ...

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Git : How to add commit in between old commits

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I have a Git repository and need to rewrite my local history by inserting a new commit in between old commits. More specifically my sitatution is like this:               AB—BC—CD—EF MASTER and I wanted to come up with something like this: AB—BC—SA—CD—EF MASTER Where SA is my new commit i.e to be inserted b/w ...

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Apache Ant tasks for JMX access

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I wanted to invoke JMX operations from the Ant tasks. However finding usable ant tasks library as well as the usage was rather tricky. So let me share my experience to make things easier for others. Ant tasks for JMX operations I decided to follow Tomcat documentation and used ant tasks distributed with tomcat. Just for the record the usage ...

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JavaMail can be evil (and force you to restart your app server)

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JavaMail always had an interesting approach when it comes to its configuration. Basically you have to fill an untyped map or Properties structure and hope for the correct interpretation. Countless tutorials on the net show the minimal properties required to make it work (send / receive mails). However, as we painfully just learned, there are some lesser known properties you ...

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10 things you can do to make your app secure: #3 Validate Input

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This is part #3 of a series of posts on the OWASP Top 10 Proactive Development Controls. Your first line of defence against attacks should always be to check all data from untrusted sources. Input validation is fundamental to application security, and a basic part of good defensive programming. This is simple, and obvious – and often done wrong.   ...

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