| /* |
| * 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.beam.runners.dataflow.worker.status; |
| |
| import java.io.IOException; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServlet; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import org.apache.beam.vendor.guava.v26_0_jre.com.google.common.base.Strings; |
| |
| /** Base class for status servlets. */ |
| public abstract class BaseStatusServlet extends HttpServlet { |
| |
| private final String path; |
| |
| protected BaseStatusServlet(String path) { |
| this.path = path.startsWith("/") ? path : "/" + path; |
| } |
| |
| /** Return the path that this servlet should listen on. */ |
| public String getPath() { |
| return path; |
| } |
| |
| /** |
| * Return the servlet that this path is on, modified to include the specified query {@code |
| * parameters} if any. |
| */ |
| protected String getPath(String parameters) { |
| if (Strings.isNullOrEmpty(parameters)) { |
| return path; |
| } else { |
| return path + "?" + parameters; |
| } |
| } |
| |
| @Override |
| protected abstract void doGet(HttpServletRequest request, HttpServletResponse response) |
| throws IOException, ServletException; |
| } |