How to use

TraceeFilterConfiguration

in

de.holisticon.util.tracee.configuration

private void writeContextToResponse(HttpServletResponse response, TraceeFilterConfiguration configuration) {
  if (configuration.shouldProcessContext(OutgoingResponse) && !backend.isEmpty()) {
    final Map<String, String> filteredContext = backend.getConfiguration(profile).filterDeniedParams(backend, OutgoingResponse);
    response.setHeader(HTTP_HEADER_NAME, transportSerialization.render(filteredContext));
  }
}

void httpRequestInitialized(HttpServletRequest request) {
  final TraceeFilterConfiguration configuration = backend.getConfiguration();
  if (configuration.shouldProcessContext(IncomingRequest)) {
    mergeIncomingContextToBackend(request);
  }
  if (configuration.shouldGenerateRequestId() && !backend.containsKey(TraceeConstants.REQUEST_ID_KEY)) {
    backend.put(TraceeConstants.REQUEST_ID_KEY, Utilities.createRandomAlphanumeric(configuration.generatedRequestIdLength()));
  }
  if (configuration.shouldGenerateSessionId() && !backend.containsKey(TraceeConstants.SESSION_ID_KEY)) {
    final HttpSession session = request.getSession(false);
    if (session != null) {
      backend.put(TraceeConstants.SESSION_ID_KEY, anonymizedSessionKey(session.getId(), configuration.generatedSessionIdLength()));
    }
  }
}

@Override
public final void sessionCreated(HttpSessionEvent httpSessionEvent) {
  if (backend.getConfiguration().shouldGenerateSessionId()) {
    final String sessionId = httpSessionEvent.getSession().getId();
    backend.put(TraceeConstants.SESSION_ID_KEY, anonymizedSessionKey(sessionId, backend.getConfiguration().generatedSessionIdLength()));
  }
}

protected final void handleIncoming(SOAPMessageContext context) {
  final SOAPPart soapPart = context.getMessage().getSOAPPart();
  try {
    final TraceeBackend backend = getTraceeBackend();
    final SOAPHeader header = soapPart.getEnvelope().getHeader();
    if (header != null && backend.getConfiguration().shouldProcessContext(IncomingRequest)) {
      final Map<String, String> parsedContext = transportSerialization.parse(header);
      final Map<String, String> filteredContext = backend.getConfiguration().filterDeniedParams(parsedContext, IncomingRequest);
      getTraceeBackend().putAll(filteredContext);
    }
    // generate request id if it doesn't exist
    if (getTraceeBackend().get(TraceeConstants.REQUEST_ID_KEY) == null
        && getTraceeBackend().getConfiguration().shouldGenerateRequestId()) {
      getTraceeBackend().put(TraceeConstants.REQUEST_ID_KEY,
          Utilities.createRandomAlphanumeric(getTraceeBackend().getConfiguration().generatedRequestIdLength()));
    }
  } catch (final SOAPException e) {
    traceeLogger.error("TraceeServerHandler - Error during precessing of inbound soap header");
  }
}

private void mergeIncomingContextToBackend(HttpServletRequest request) {
  final Enumeration headers = request.getHeaders(HTTP_HEADER_NAME);
  if (headers == null) {
    throw new IllegalStateException("Could not read headers with name '"
        + HTTP_HEADER_NAME + "'. The access seem to be forbidden by the container.");
  }
  final Map<String, String> parsed = new HashMap<String, String>();
  while (headers.hasMoreElements()) {
    parsed.putAll(transportSerialization.parse((String) headers.nextElement()));
  }
  final Map<String, String> filtered = backend.getConfiguration().filterDeniedParams(parsed, IncomingRequest);
  backend.putAll(filtered);
}

protected final void handleIncoming(final SOAPMessageContext context) {
  final SOAPMessage msg = context.getMessage();
  final TraceeBackend backend = getTraceeBackend();
  if (msg != null && backend.getConfiguration().shouldProcessContext(OutgoingRequest)) {
    try {
      final SOAPEnvelope env = msg.getSOAPPart().getEnvelope();
      // get soap header
      final SOAPHeader header = env.getHeader();
      if (header != null) {
        parseSoapHeaderToBackend(header);
      }
    } catch (final SOAPException e) {
      e.printStackTrace();
      traceeLogger.error(
          "TraceeClientHandler : Exception occurred during processing of inbound message.", e);
    }
  }
}

final void parseSoapHeaderToBackend(SOAPHeader soapHeader) {
  final Map<String, String> parsedContext = transportSerialization.parse(soapHeader);
  final Map<String, String> filteredContext = getTraceeBackend().getConfiguration().filterDeniedParams(parsedContext, OutgoingRequest);
  getTraceeBackend().putAll(filteredContext);
}

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
  final TraceeFilterConfiguration configuration = backend.getConfiguration(profileName);
  if (configuration.shouldProcessContext(IncomingRequest))
    mergeIncomingContextToBackend(request, configuration);
  // create random RequestId if not already set
  if (!backend.containsKey(TraceeConstants.REQUEST_ID_KEY) && configuration.shouldGenerateRequestId()) {
    backend.put(TraceeConstants.REQUEST_ID_KEY, Utilities.createRandomAlphanumeric(configuration.generatedRequestIdLength()));
  }
  // create another random id to identify the http session
  if (!backend.containsKey(TraceeConstants.SESSION_ID_KEY) && configuration.shouldGenerateSessionId()) {
    final HttpSession session = request.getSession(false);
    if (session != null) {
      backend.put(TraceeConstants.SESSION_ID_KEY, Utilities.createAlphanumericHash(session.getId(),
          configuration.generatedSessionIdLength()));
    }
  }
  return true;
}

@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object o, ModelAndView modelAndView) throws Exception {
  final TraceeFilterConfiguration configuration = backend.getConfiguration(profileName);
  if (configuration.shouldProcessContext(OutgoingResponse) && !backend.isEmpty()) {
    final Map<String, String> filteredContext = configuration.filterDeniedParams(backend, OutgoingResponse);
    response.setHeader(outgoingHeaderName, httpJsonHeaderSerialization.render(filteredContext));
  }
  backend.clear();
}

protected final void handleOutgoing(SOAPMessageContext context) {
  final TraceeBackend backend = getTraceeBackend();
  final SOAPMessage msg = context.getMessage();
  try {
    if (msg != null && backend.getConfiguration().shouldProcessContext(OutgoingResponse)) {
      final SOAPEnvelope env = msg.getSOAPPart().getEnvelope();
      // get or create header
      final SOAPHeader header = getOrCreateHeader(env);
      final Map<String, String> filteredContext = backend.getConfiguration().filterDeniedParams(backend, OutgoingResponse);
      transportSerialization.renderTo(filteredContext, header);
      msg.saveChanges();
      context.setMessage(msg);
    }
  } catch (final SOAPException e) {
    traceeLogger.error("TraceeServerHandler : Exception "
        + "occurred during processing of outbound message.", e);
  } finally {
    // must reset tracee context
    backend.clear();
  }
}

protected final void handleOutgoing(final SOAPMessageContext context) {
  final SOAPMessage msg = context.getMessage();
  final TraceeBackend backend = getTraceeBackend();
  if (msg != null && backend.getConfiguration().shouldProcessContext(IncomingResponse)) {
    try {
      final SOAPEnvelope env = msg.getSOAPPart().getEnvelope();
      // get or create header
      SOAPHeader header = env.getHeader();
      if (header == null) {
        header = env.addHeader();
      }
      final Map<String, String> filteredContext = backend.getConfiguration().filterDeniedParams(backend, IncomingResponse);
      transportSerialization.renderTo(filteredContext, header);
      msg.saveChanges();
    } catch (final SOAPException e) {
      traceeLogger.error("TraceeClientHandler : Exception "
          + "occurred during processing of outbound message.", e);
    }
    context.setMessage(msg);
  }
}