| /** |
| * 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.pulsar.common.configuration; |
| |
| import java.io.File; |
| import java.util.function.Supplier; |
| import javax.servlet.ServletContext; |
| import javax.ws.rs.GET; |
| import javax.ws.rs.Path; |
| import javax.ws.rs.WebApplicationException; |
| import javax.ws.rs.core.Context; |
| import javax.ws.rs.core.Response.Status; |
| |
| /** |
| * Web resource used by the VIP service to check to availability of the service instance. |
| */ |
| @Path("/status.html") |
| public class VipStatus { |
| |
| public static final String ATTRIBUTE_STATUS_FILE_PATH = "statusFilePath"; |
| public static final String ATTRIBUTE_IS_READY_PROBE = "isReadyProbe"; |
| |
| @Context |
| protected ServletContext servletContext; |
| |
| @GET |
| @Context |
| public String checkStatus() { |
| String statusFilePath = (String) servletContext.getAttribute(ATTRIBUTE_STATUS_FILE_PATH); |
| @SuppressWarnings("unchecked") |
| Supplier<Boolean> isReadyProbe = (Supplier<Boolean>) servletContext.getAttribute(ATTRIBUTE_IS_READY_PROBE); |
| |
| boolean isReady = isReadyProbe != null ? isReadyProbe.get() : true; |
| |
| if (statusFilePath != null) { |
| File statusFile = new File(statusFilePath); |
| if (isReady && statusFile.exists() && statusFile.isFile()) { |
| return "OK"; |
| } |
| } |
| throw new WebApplicationException(Status.NOT_FOUND); |
| } |
| |
| } |