| // Copyright (C) 2024 The Android Open Source Project |
| // |
| // Licensed 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 com.ericsson.gerrit.plugins.highavailability; |
| |
| import static com.google.common.base.MoreObjects.firstNonNull; |
| |
| import com.google.gerrit.common.Nullable; |
| import com.google.gerrit.httpd.AllRequestFilter; |
| import com.google.gerrit.server.config.GerritInstanceId; |
| import com.google.gerrit.server.config.GerritInstanceName; |
| import com.google.inject.Inject; |
| import java.io.IOException; |
| import javax.servlet.FilterChain; |
| import javax.servlet.ServletException; |
| import javax.servlet.ServletRequest; |
| import javax.servlet.ServletResponse; |
| import javax.servlet.http.HttpServletResponse; |
| |
| public class XGerritInstanceFilter extends AllRequestFilter { |
| private static final String X_GERRIT_INSTANCE = "X-Gerrit-Instance"; |
| |
| private final String instanceId; |
| private final String instanceName; |
| |
| @Inject |
| XGerritInstanceFilter( |
| @Nullable @GerritInstanceId String instanceId, @GerritInstanceName String instanceName) { |
| this.instanceId = instanceId; |
| this.instanceName = instanceName; |
| } |
| |
| @Override |
| public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) |
| throws IOException, ServletException { |
| if (response instanceof HttpServletResponse) { |
| ((HttpServletResponse) response) |
| .addHeader(X_GERRIT_INSTANCE, firstNonNull(instanceId, instanceName)); |
| } |
| chain.doFilter(request, response); |
| } |
| } |