| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.metamodel.membrane.server; |
| |
| import java.io.File; |
| |
| import javax.servlet.ServletException; |
| |
| import org.apache.metamodel.util.FileHelper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.springframework.web.context.ContextLoaderListener; |
| import org.springframework.web.context.request.RequestContextListener; |
| import org.springframework.web.filter.CharacterEncodingFilter; |
| import org.springframework.web.servlet.DispatcherServlet; |
| |
| import com.google.common.base.Strings; |
| |
| import io.undertow.Undertow; |
| import io.undertow.server.HttpHandler; |
| import io.undertow.server.handlers.resource.FileResourceManager; |
| import io.undertow.servlet.Servlets; |
| import io.undertow.servlet.api.DeploymentInfo; |
| import io.undertow.servlet.api.DeploymentManager; |
| |
| /** |
| * Defines the main class that starts the Undertow-based web server. |
| */ |
| public class WebServer { |
| |
| private static final Logger logger = LoggerFactory.getLogger(WebServer.class); |
| |
| private static final int DEFAULT_PORT = 8080; |
| |
| public static void main(final String[] args) throws Exception { |
| prepareDataDirectoryIfNeeded(); |
| |
| final String portEnv = System.getenv("MEMBRANE_HTTP_PORT"); |
| final int port = Strings.isNullOrEmpty(portEnv) ? DEFAULT_PORT : Integer.parseInt(portEnv); |
| final String enableCorsEnv = System.getenv("ENABLE_CORS"); |
| final boolean enableCors = !Strings.isNullOrEmpty(enableCorsEnv); |
| |
| logger.info("Apache MetaModel Membrane server initiating on port {}", port); |
| |
| startServer(port, enableCors); |
| |
| logger.info("Apache MetaModel Membrane server started on port {}", port); |
| } |
| |
| private static void prepareDataDirectoryIfNeeded() { |
| final String property = "DATA_DIRECTORY"; |
| if (System.getProperty(property) == null && System.getenv(property) == null) { |
| final String tempDirectory = FileHelper.getTempDir().getAbsolutePath() + "/membrane"; |
| logger.warn("No DATA_DIRECTORY defined, using {}", tempDirectory); |
| System.setProperty(property, tempDirectory); |
| } |
| } |
| |
| public static void startServer(int port, boolean enableCors) throws Exception { |
| final DeploymentInfo deployment = Servlets.deployment().setClassLoader(WebServer.class.getClassLoader()); |
| deployment.setContextPath(""); |
| deployment.setDeploymentName("membrane"); |
| deployment.addInitParameter("contextConfigLocation", "classpath:context/application-context.xml"); |
| deployment.setResourceManager(new FileResourceManager(new File("."), 0)); |
| deployment.addListener(Servlets.listener(ContextLoaderListener.class)); |
| deployment.addListener(Servlets.listener(RequestContextListener.class)); |
| deployment.addServlet(Servlets.servlet("dispatcher", DispatcherServlet.class).addMapping("/*") |
| .addInitParam("contextConfigLocation", "classpath:context/dispatcher-servlet.xml")); |
| deployment.addFilter(Servlets.filter(CharacterEncodingFilter.class).addInitParam("forceEncoding", "true") |
| .addInitParam("encoding", "UTF-8")); |
| |
| final DeploymentManager manager = Servlets.defaultContainer().addDeployment(deployment); |
| manager.deploy(); |
| |
| HttpHandler handler; |
| if (enableCors) { |
| CorsHandlers corsHandlers = new CorsHandlers(); |
| handler = corsHandlers.allowOrigin(manager.start()); |
| } |
| else |
| handler = manager.start(); |
| |
| final Undertow server = Undertow.builder().addHttpListener(port, "0.0.0.0").setHandler(handler).build(); |
| server.start(); |
| |
| Runtime.getRuntime().addShutdownHook(new Thread() { |
| @Override |
| public void run() { |
| // graceful shutdown of everything |
| server.stop(); |
| try { |
| manager.stop(); |
| } catch (ServletException e) { |
| } |
| manager.undeploy(); |
| } |
| }); |
| } |
| } |