In Apache Stratos, we have recently worked on merging 3 of our main products (Stratos Manager, Cloud Controller and Auto-scaler) along with WSO2 CEP (Stratos uses WSO2 CEP as its complex event processing engine) into a single distribution using the powerfulness of WSO2 Carbon Framework. By doing so, we have expected to gain following main benefits:
1. Reduce the barrier for a new developer to getting started with Stratos.
2. Make lives of Stratos developers' easier by reducing the number of JVMs.
3. Deploying a distributed set-up using a single distribution in a production environment.
Earlier, in order to run Stratos, one needed to configure 3 Stratos products mentioned above, in addition to a message broker (Stratos uses message broker as its main inter-component communication channel), WSO2 CEP and WSO2 BAM (if you need monitoring capability). This would be resulted in six JVMs (assuming MB is also a JVM process) and would consume considerable amount of memory of your machine. Hence, lot of new blood, would rather give-up even without thinking of starting Stratos.
With the introduction of this single distribution, as a developer, you can get-started with Stratos only with two JVMs namely Stratos JVM and MB (assuming it's a JVM), and in-turn would help us to attract more people to the project.
Reducing number of JVMs makes it easier to check logs, debug and makes your life way easier, as a contributor to Stratos.
Further, you can use this single Stratos distribution and start Stratos Manager, Cloud Controller and Auto-scaler in 3 separate JVMs which will be useful in a real production deployment. In this case, of course you need to deploy WSO2 CEP and WSO2 BAM separately in addition to a Message Broker.
Other than these, a single JVM Stratos deployment also capable of writing the data published by Stratos into a file (repository/logs/aggregate.log), so that you do not need an external business activity monitor in order to have a developer environment.
Try it out by following our wiki documentation here.