Prerequisites

Prerequisites

You will need Java 8 (or higher).

To build an application against Dempsy you will need to add the Dempsy dependencies to your build. This should be as simple as including the following dependency in your maven pom.xml file (or the gradle equivalent).

<dependency>
   <groupId>net.dempsy</groupId>
   <artifactId>dempsy-framework.impl</artifactId>
   <version>0.10</version>
</dependency>

The core Dempsy jar files are deployed to the Maven Central Repository. See the section on Understanding the Dempsy Codebase for a description of each of the artifacts.

You can build Dempsy applications and run them within a single VM. Once you want to run your application distributed you will need an installation of Apache ZooKeeper. In a development environment, or if you are just trying out Dempsy, then you can get away with a single ZooKeeper server but we suggest following the recommendations of the ZooKeeper team.

Next section: Simple Example