void info(Object, Throwable); public boolean isDebugEnabled(); public boolean isErrorEnabled(); public boolean isFatalEnabled(); public boolean isInfoEnabled(); public boolean isTraceEnabled(); public boolean isWarnEnabled(); public void trace(Object); public void trace(Object, Throwable); public void warn(Object); public void warn(Object, Throwable); } org/apache/commons/logging/impl/Log4JCategoryLog.class package org.apache.commons.logging.impl; public final synchronized class Log4JCategoryLog implements...

        } catch (Exception e) {
            invalidMetadata(session, trace, metadata, repository, e);
            result.addException(e);
        }

        return (versioning != null) ? versioning : Versioning.newInstance();
    }

    private void invalidMetadata(
            RepositorySystemSession session,
            RequestTrace trace,
            Metadata metadata,
            ArtifactRepository repository,

     *
     * @param content
     * @param error
     */
    void debug(CharSequence content, Throwable error);

    /**
     * Send an exception to the user in the <b>debug</b> error level.<br>
     * The stack trace for this exception will be output when this error level is enabled.
     *
     * @param error
     */
    void debug(Throwable error);

    void debug(Supplier<String> content);

                // ignore
            }
        }
        cache.clear();
    }

    public void register(MavenProject project, Key key, CacheRecord record) {
        // default cache does not track extension usage
    }

    public void dispose() {
        flush();
    }

    </default>
  </defaults>
  <classes>
    <class java.clone="deep">
      <name>TrackableBase</name>
      <version>1.0.0+</version>
      <description>
        common base class that contains code to track the source for
        this instance (USER|GLOBAL)
      </description>
      <codeSegments>
        <codeSegment>
          <version>1.0.0/1.3.0</version>
          <code>

        return result;
    }

    private void missingDescriptor(
            RepositorySystemSession session, RequestTrace trace, Artifact artifact, Exception exception) {
        RepositoryEvent.Builder event = new RepositoryEvent.Builder(session, EventType.ARTIFACT_DESCRIPTOR_MISSING);
        event.setTrace(trace);
        event.setArtifact(artifact);
        event.setException(exception);

        requests.add(new MetadataRequest(metadata, null, REPOSITORY_CONTEXT).setTrace(trace));

        for (RemoteRepository repository : request.getRepositories()) {
            requests.add(new MetadataRequest(metadata, repository, REPOSITORY_CONTEXT).setTrace(trace));
        }

        List<MetadataResult> results = repositorySystem.resolveMetadata(request.getRepositorySession(), requests);

org.apache.commons.logging.Log { private static final String FQCN; private org.apache.log4j.Category category; public void Log4JCategoryLog(); public void Log4JCategoryLog(String); public void Log4JCategoryLog(org.apache.log4j.Category); public void trace(Object); public void trace(Object, Throwable); public void debug(Object); public void debug(Object, Throwable); public void info(Object); public void info(Object, Throwable); public void warn(Object); public void warn(Object, Throwable); public void error(Object);...

            }
        }

        DependencyRequest depRequest = new DependencyRequest(collect, filter);
        depRequest.setTrace(trace);

        DependencyNode node;
        try {
            collect.setTrace(RequestTrace.newChild(trace, depRequest));
            node = repoSystem.collectDependencies(session, collect).getRoot();
            result.setDependencyGraph(node);

     * from the information that is available at the point the problem occurs and as such merely serves as a best effort
     * to provide information to the user to track the problem back to its origin.
     *
     * @return The identifier of the model from which the problem originated or an empty string if unknown, never
     *         {@code null}.
     */
    String getModelId();