code: public String toJson(Object o) {
  		try {
  			String json = objectMapper.writeValueAsString(o);
  			LOG.debug(json);
  			return json;
  		} catch (Exception e) {
  			throw Exceptions.propagate(e);
  		}
  	}
docs: /* (non-Javadoc)
  @see org.ektorp.impl.JsonSerializer#toJson(java.lang.Object)