Securing Hazelcast (tcp) traffic with Stunnel
Hazelcast is a distributed in-memory data grid, which allows to evenly share data among nodes in clustered environments. The open source version of Hazelcast does not support encryption…
Docker and iptables firewall
Docker works perfectly fine when no firewall is running on the host machine. Without the firewall docker containers can communicate with each other and with the outside world.…
Atomic Updates on MongoDB with Spring Data
MongoDB provides operators for atomic updates in addition to the normal insert and modify functionality. These operators include, $inc, $set and $unset; and are particularly useful for keeping counters…
CAS and distributed Infinispan integration
CAS is a centralised authentication server that makes it very easy to implement single sign-on (SSO) in java application, and is a very good OAuth alternative. For distributed/clustered…
Spring and Infinispan Integration on Wildfly Cluster
Spring framework provides a caching abstraction API that makes it very easy and consistent to use a lot of embeddable caching frameworks like, EHCache, Infinispan, Hazelcast etc. But sometimes it is…
Spring Boot and WordPress CMS Integration
There are a lot of excellent open source content management systems available today, WordPress being one of them, which is widely used. WordPress is a PHP based CMS…
Using Standalone ActiveMQ Broker with Wildfly
Wildfly is an open source J2EE container, which comes with an embedded HornetQ JMS broker enabled by default in it’s full configuration. The embedded HornetQ works great out…
Protect your identity from SSH servers
Recently I came across a tweet that highlighted a serious privacy issue related to SSH servers and online services that publish user information in public domain without having…
Real-time Web Cam Surveillance with Raspberry-PI
Raspberry PI is a great little tool for building small projects, from personal web servers to robot butlers. With it’s linux core you could potentially use RPI like…
XMPP web chat with ejabberd, Converse.js and Spring MVC
Converse.js is a fine little XMPP web chat client that can easily be used in web applications. It can integrate with various online XMPP services, like Google Talk, MSN…