| /* |
| * 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.functions.worker.rest; |
| |
| import io.swagger.annotations.ApiOperation; |
| import io.swagger.annotations.ApiResponse; |
| import io.swagger.annotations.ApiResponses; |
| import java.util.function.Supplier; |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| 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; |
| import org.apache.pulsar.functions.worker.WorkerService; |
| |
| @Path("/") |
| public class WorkerReadinessResource implements Supplier<WorkerService> { |
| |
| public static final String ATTRIBUTE_WORKER_SERVICE = "worker"; |
| |
| private WorkerService workerService; |
| @Context |
| protected ServletContext servletContext; |
| @Context |
| protected HttpServletRequest httpRequest; |
| |
| @Override |
| public synchronized WorkerService get() { |
| if (this.workerService == null) { |
| this.workerService = (WorkerService) servletContext.getAttribute(ATTRIBUTE_WORKER_SERVICE); |
| } |
| return this.workerService; |
| } |
| |
| @GET |
| @ApiOperation( |
| value = "Determines whether the worker service is initialized and ready for use", |
| response = Boolean.class |
| ) |
| @ApiResponses(value = { |
| @ApiResponse(code = 400, message = "Invalid request"), |
| @ApiResponse(code = 408, message = "Request timeout") |
| }) |
| @Path("/initialized") |
| public boolean isInitialized() { |
| if (!get().isInitialized()) { |
| throw new WebApplicationException(Response.Status.SERVICE_UNAVAILABLE); |
| } |
| return true; |
| } |
| } |