Development and Testing Guide

This guide explains how to build the various components, and how to deploy them once built. Note that some of the components being built need to be inserted to a docker image before they can be tested. Thus, one should have an installed environment as described in the development environment installation instructions or in the getting started guide


The storlets repository consists of code written in Python, Java and C. We have chose ant to serve as a ‘make’ tool for all of the code. The main build task in build.xml is dependent on two other build tasks:

  1. build_storlets task. This task builds all the sample storlets used in the system tests.
  2. build engine task. This task builds/packages the following components:
  1. The storlet middleware and the “storlet docker gateway” python code. These are built as two packages in a single ‘storlets’ egg:
  • storlet_middleware
  • storlet_gateway
  1. The SBus code. This is the communication module between the gateway and the Docker container. It has a transport layer written in “C” with ‘bindings’ to both Java and Python.
  2. The Python written storlet_factory_daemon, which is packaged for installation in a Docker image
  3. The Java SDaemon code, which is the daemon code that loads the storlets in run time. This code is compiled to a .jar that is later installed in the Docker image.
  4. The Java SCommon code, which has the storlet interface declaration, as well as the accompanying classes appearing in the interface. This code is compiled to a .jar that is required both in the Docker image as well as for building storlets.


Two additional tasks of interest in our build.xml are the deploy_host_engine and deploy_container_engine. These tasks are based on the Ansible installation scripts and do the following:

  1. deploy_host_engine would get all the code that is relevant to the host side (python middleware and SBus) and deploy it on the hosts as descrined in the cluster_config.json file
  2. deploy_container_engine, would create an updated image of the tenant defined in the cluster_config.json and distribute it to all nodes as defined in the configuration.

Running the Tests

Unit tests

Unit tests can be invoked using:


from the repo root.

Functional tests

The functional tests can be invoked using:

./.functests dev


To run the entire set of functional tests, which takes longer run: ./.functests jenkins

from the repo root.


Other than testing, those tests are a good reference for writing and deploying storlets.