@Override
            public int getWeight() {
                return 5;
            }
        });
        assertEquals(10, extractorFactory.getExtractor(key).getWeight());
        assertEquals(5, extractorFactory.getExtractors(key)[1].getWeight());
        assertEquals(1, extractorFactory.getExtractors(key)[2].getWeight());
        assertEquals(3, extractorFactory.getExtractors(key).length);
    }

                    uq.setParentUrl(url);
                    uq.setSessionId(crawlerContext.sessionId);
                    uq.setUrl(d.getUrl());
                    uq.setWeight(d.getWeight());
                    return uq;
                })
                .collect(Collectors.toList());
        urlQueueService.offerAll(crawlerContext.sessionId, childList);
    }

    /**

                }
                throw new ExtractException("Failed to extract the content using available extractors.");
            }

            @Override
            public int getWeight() {
                return extractors[0].getWeight();
            }
        };
    }

    /**
     * Retrieves all extractors for the specified key.
     * @param key The key associated with the extractors.

    }

    /**
     * Gets the weight/priority of this request.
     * @return the weight
     */
    public float getWeight() {
        return weight;
    }

    /**
     * Sets the weight/priority of this request.
     * @param weight the weight
     */
    public void setWeight(float weight) {
        this.weight = weight;
    }

    /**
     * Returns the hash code for this RequestData.

    /**
     * Returns the weight of the extractor.
     * The default implementation returns a weight of 1.
     *
     * @return the weight of the extractor
     */
    default int getWeight() {
        return 1;
    }

    /**
     * Retrieves the weight of the URL queue.
     *
     * @return the weight as a float value.
     */
    float getWeight();

    /**
     * Sets the weight of the URL queue.
     *
     * @param weight the weight to set
     */
    void setWeight(float weight);

     */
    @Override
    public void setLastModified(final Long lastModified) {
        this.lastModified = lastModified;
    }

    @Override
    public float getWeight() {
        return weight;
    }

    @Override
    public void setWeight(float weight) {
        this.weight = weight;
    }

    /**
     * Returns a string representation of this object.
     * @return A string representation.

                    uq.setParentUrl(url);
                    uq.setSessionId(crawlerContext.getSessionId());
                    uq.setUrl(d.getUrl());
                    uq.setWeight(d.getWeight());
                    return uq;
                })
                .collect(Collectors.toList());

        if (!childList.isEmpty()) {

            return null;
        }

        @Override
        public void setSessionId(String sessionId) {
        }

        @Override
        public void setWeight(float weight) {
        }

        @Override
        public float getWeight() {
            return 0.0f;
        }

        @Override
        public void setCreateTime(Long createTime) {
        }

        @Override

                        // head method
                        responseData =
                                client.execute(RequestDataBuilder.newRequestData().head().url(url).weight(urlQueue.getWeight()).build());
                        if (responseData == null) {
                            return true;
                        }