We have [a series of blog](https://blog.gradle.org/how-gradle-works-1) that explains how Gradle works.
This may help you better understand and contribute to Gradle.

### Debugging Gradle

You can debug Gradle by adding `-Dorg.gradle.debug=true` to the command-line. Gradle will wait for you to attach a debugger at `localhost:5005` by default.

                            buf.append('\n');
                        } catch (final Exception e) {
                            if (logger.isDebugEnabled()) {
                                logger.debug("Exception in an internal extractor.", e);
                            }
                        }
                    }
                }
            }
        } catch (final MaxLengthExceededException e) {

            docList.stream().forEach(doc -> {
                if (!thumbnailManager.offer(doc)) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Removing {}={} from doc[{}]", thumbnailField, doc.get(thumbnailField),
                                doc.get(fessConfig.getIndexFieldUrl()));
                    }
                    doc.remove(thumbnailField);

                    }
                }
            } catch (final IOException e) {
                if (logger.isDebugEnabled()) {
                    logger.debug("Failed to read data.", e);
                }
                return StringUtil.EMPTY;
            }

            return buf.toString().trim();
        }

        private boolean isSpaceChar(final int c) {

    protected List<Pair<String, Float>> additionalDefaultList = new ArrayList<>();

    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialize {}", this.getClass().getSimpleName());
        }
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        if (responseFields == null) {

    }

    public synchronized void putToInfoMap(final String key, final String value) {
        if (infoMap == null) {
            infoMap = Collections.synchronizedMap(new LinkedHashMap<>());
        }
        logger.debug("infoMap: {}={} => {}", key, value, infoMap);
        infoMap.put(key, value);
    }

    public void updateParams(final String sessionId, final String name, final int dayForCleanup) {

		}
	}()

	context.AfterFunc(s.ctx, func() {
		if err := s.cniListenServer.Close(); err != nil {
			log.Errorf("CNI listen server terminated with error: %v", err)
		} else {
			log.Debug("CNI listen server terminated")
		}
	})
	return nil
}

func (s *CniPluginServer) handleAddEvent(w http.ResponseWriter, req *http.Request) {
	if req.Body == nil {
		log.Error("empty request body")

        } catch (final ResultOffsetExceededException e) {
            if (logger.isDebugEnabled()) {
                logger.debug(e.getMessage(), e);
            }
            throwValidationErrorApi(messages -> messages.addErrorsResultSizeExceeded(GLOBAL));
        }

        return null;
    }

    // GET /api/admin/storage/download/{id}/

    }

    public void test_getLogLevel() {
        final String logLevel = systemHelper.getLogLevel();
        try {
            systemHelper.setLogLevel("DEBUG");
            assertEquals("DEBUG", systemHelper.getLogLevel());
            systemHelper.setLogLevel("INFO");
            assertEquals("INFO", systemHelper.getLogLevel());
            systemHelper.setLogLevel("WARN");

            logger.debug("While recursing: " + e.getMessage(), e);
            result.addCircularDependencyException(e);
        } catch (OverConstrainedVersionException e) {
            logger.debug("While recursing: " + e.getMessage(), e);
            result.addVersionRangeViolation(e);
        } catch (ArtifactResolutionException e) {
            logger.debug("While recursing: " + e.getMessage(), e);