public int getElasticityFactor() {
    int elasticityFactor = getInt(JOB_ELASTICITY_FACTOR, DEFAULT_JOB_ELASTICITY_FACTOR);
    if (elasticityFactor < 1) {
      throw new ConfigException("Elasticity factor can not be less than 1");
    }
    return elasticityFactor;
  }
Get config loader factory according to the configs
@return full qualified name of {@link ConfigLoaderFactory}
samza-core/src/main/java/org/apache/samza/config/JobConfig.java