| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.ambari.server.view; |
| |
| import com.google.inject.Singleton; |
| import org.slf4j.MDC; |
| |
| import javax.servlet.Filter; |
| import javax.servlet.FilterChain; |
| import javax.servlet.FilterConfig; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletRequest; |
| import java.io.IOException; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Inserts view name, view version and view instance name into MDC info for views REST for logging in views. |
| */ |
| @Singleton |
| public class AmbariViewsMDCLoggingFilter implements Filter { |
| |
| private final static String patternStr = "/api/v1/views/(.*)/versions/(.*)/instances/([^/]+).*"; |
| private final static Pattern pattern = Pattern.compile(patternStr); |
| |
| @Override |
| public void init(FilterConfig filterConfig) throws ServletException { |
| // do nothing |
| } |
| |
| @Override |
| public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { |
| |
| buildMDC(servletRequest); |
| try { |
| filterChain.doFilter(servletRequest, servletResponse); |
| } finally { |
| clear(); |
| } |
| } |
| |
| private void buildMDC(ServletRequest request) { |
| if ((request instanceof HttpServletRequest) && MDC.getMDCAdapter() != null) { |
| String url = ((HttpServletRequest) request).getRequestURI(); |
| Matcher matcher = pattern.matcher(url); |
| if (matcher.find()) { |
| MDC.put("viewName", matcher.group(1)); |
| MDC.put("viewVersion", matcher.group(2)); |
| MDC.put("viewInstanceName", matcher.group(3)); |
| } |
| } |
| } |
| |
| private void clear() { |
| MDC.clear(); |
| } |
| |
| @Override |
| public void destroy() { |
| //do nothing |
| } |
| } |