This note demonstrates how to create and deploy an MDP, and how to control it, using both Spring’s inbuilt component management mechanisms, and JMX. Scenario We have a number of JMS listeners in our application. Having ported our hardware to a grid of virtual machines, we want the feature to switch-on and switch-off the listeners on the VMs, and re-allocate the listeners to VMs across the grid ...
Synopsis This note deals with AMQP, and some implementations, especially Qpid and ActiveMQ.Introduction AMQP stands for Advanced Messaging Queuing Protocol. It is a standard for cross platform messaging. It is a wire protocol and aims to enable functional compatibility between clients (from various platforms) and messaging brokers.It is pretty comprehensive and aims to cover all distributed business scenarios. ...
Synopsis This note describes a few simple commands on how to view the RAM and CPU usage of your Java process. It provides brief pointers on how to identify the influencing parameters and how to tweak it.Memory Java Heap The heap size of your Java process can be controlled by using a combination of –Xmx and –Xms. The heap size ...
