public List<String> getSystemNames() {
    Config subConf = subset(SYSTEMS_PREFIX, true);
    ArrayList<String> systemNames = new ArrayList<>();
    for (Map.Entry<String, String> entry : subConf.entrySet()) {
      String key = entry.getKey();
      if (key.endsWith(SYSTEM_FACTORY_SUFFIX)) {
        systemNames.add(key.replace(SYSTEM_FACTORY_SUFFIX, EMPTY));
      }
    }
    return systemNames;
  }
Get a list of system names.

@return A list system names
samza-core/src/main/java/org/apache/samza/config/SystemConfig.java