Line data    Source code

       1             : // Copyright (C) 2019 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.httpd;
      16             : 
      17             : import com.google.gerrit.server.RequestCleanup;
      18             : import com.google.inject.Inject;
      19             : import com.google.inject.Module;
      20             : import com.google.inject.Provider;
      21             : import com.google.inject.Singleton;
      22             : import com.google.inject.servlet.ServletModule;
      23             : import java.io.IOException;
      24             : import javax.servlet.Filter;
      25             : import javax.servlet.FilterChain;
      26             : import javax.servlet.FilterConfig;
      27             : import javax.servlet.ServletException;
      28             : import javax.servlet.ServletRequest;
      29             : import javax.servlet.ServletResponse;
      30             : 
      31             : /** Executes any pending {@link RequestCleanup} at the end of a request. */
      32             : @Singleton
      33             : public class RequestCleanupFilter implements Filter {
      34             :   public static Module module() {
      35          99 :     return new ServletModule() {
      36             :       @Override
      37             :       protected void configureServlets() {
      38          99 :         filter("/*").through(RequestCleanupFilter.class);
      39          99 :       }
      40             :     };
      41             :   }
      42             : 
      43             :   private final Provider<RequestCleanup> cleanup;
      44             : 
      45             :   @Inject
      46          99 :   RequestCleanupFilter(Provider<RequestCleanup> r) {
      47          99 :     cleanup = r;
      48          99 :   }
      49             : 
      50             :   @Override
      51          99 :   public void init(FilterConfig filterConfig) {}
      52             : 
      53             :   @Override
      54          99 :   public void destroy() {}
      55             : 
      56             :   @Override
      57             :   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
      58             :       throws IOException, ServletException {
      59             :     try {
      60          38 :       chain.doFilter(request, response);
      61             :     } finally {
      62          38 :       cleanup.get().run();
      63             :     }
      64          38 :   }
      65             : }