Java tutorial
/* * 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.ftpserver.config.spring; import java.io.File; import java.util.Arrays; import java.util.List; import java.util.Map; import org.apache.ftpserver.ConnectionConfigFactory; import org.apache.ftpserver.FtpServer; import org.apache.ftpserver.FtpServerConfigurationException; import org.apache.ftpserver.FtpServerFactory; import org.apache.ftpserver.message.MessageResource; import org.apache.ftpserver.message.MessageResourceFactory; import org.springframework.beans.factory.config.BeanDefinition; import org.springframework.beans.factory.config.BeanDefinitionHolder; import org.springframework.beans.factory.support.BeanDefinitionBuilder; import org.springframework.beans.factory.support.ManagedMap; import org.springframework.beans.factory.xml.AbstractSingleBeanDefinitionParser; import org.springframework.beans.factory.xml.ParserContext; import org.springframework.util.StringUtils; import org.w3c.dom.Element; /** * Parses the FtpServer "server" element into a Spring bean graph * * @author <a href="http://mina.apache.org">Apache MINA Project</a> */ public class ServerBeanDefinitionParser extends AbstractSingleBeanDefinitionParser { /** * {@inheritDoc} */ @Override protected Class<? extends FtpServer> getBeanClass(final Element element) { return null; } /** * {@inheritDoc} */ @Override protected void doParse(final Element element, final ParserContext parserContext, final BeanDefinitionBuilder builder) { BeanDefinitionBuilder factoryBuilder = BeanDefinitionBuilder.genericBeanDefinition(FtpServerFactory.class); List<Element> childs = SpringUtil.getChildElements(element); for (Element childElm : childs) { String childName = childElm.getLocalName(); if ("listeners".equals(childName)) { Map<?, ?> listeners = parseListeners(childElm, parserContext, builder); if (listeners.size() > 0) { factoryBuilder.addPropertyValue("listeners", listeners); } } else if ("ftplets".equals(childName)) { Map<?, ?> ftplets = parseFtplets(childElm, parserContext, builder); factoryBuilder.addPropertyValue("ftplets", ftplets); } else if ("file-user-manager".equals(childName) || "db-user-manager".equals(childName)) { Object userManager = parserContext.getDelegate().parseCustomElement(childElm, builder.getBeanDefinition()); factoryBuilder.addPropertyValue("userManager", userManager); } else if ("user-manager".equals(childName)) { factoryBuilder.addPropertyValue("userManager", SpringUtil.parseSpringChildElement(childElm, parserContext, builder)); } else if ("native-filesystem".equals(childName)) { Object fileSystem = parserContext.getDelegate().parseCustomElement(childElm, builder.getBeanDefinition()); factoryBuilder.addPropertyValue("fileSystem", fileSystem); } else if ("filesystem".equals(childName)) { factoryBuilder.addPropertyValue("fileSystem", SpringUtil.parseSpringChildElement(childElm, parserContext, builder)); } else if ("commands".equals(childName)) { Object commandFactory = parserContext.getDelegate().parseCustomElement(childElm, builder.getBeanDefinition()); factoryBuilder.addPropertyValue("commandFactory", commandFactory); } else if ("messages".equals(childName)) { MessageResource mr = parseMessageResource(childElm, parserContext, builder); factoryBuilder.addPropertyValue("messageResource", mr); } else { throw new FtpServerConfigurationException("Unknown configuration name: " + childName); } } // Configure login limits ConnectionConfigFactory connectionConfig = new ConnectionConfigFactory(); if (StringUtils.hasText(element.getAttribute("max-logins"))) { connectionConfig.setMaxLogins(SpringUtil.parseInt(element, "max-logins")); } if (StringUtils.hasText(element.getAttribute("max-threads"))) { connectionConfig.setMaxThreads(SpringUtil.parseInt(element, "max-threads")); } if (StringUtils.hasText(element.getAttribute("max-anon-logins"))) { connectionConfig.setMaxAnonymousLogins(SpringUtil.parseInt(element, "max-anon-logins")); } if (StringUtils.hasText(element.getAttribute("anon-enabled"))) { connectionConfig.setAnonymousLoginEnabled(SpringUtil.parseBoolean(element, "anon-enabled", true)); } if (StringUtils.hasText(element.getAttribute("max-login-failures"))) { connectionConfig.setMaxLoginFailures(SpringUtil.parseInt(element, "max-login-failures")); } if (StringUtils.hasText(element.getAttribute("login-failure-delay"))) { connectionConfig.setLoginFailureDelay(SpringUtil.parseInt(element, "login-failure-delay")); } factoryBuilder.addPropertyValue("connectionConfig", connectionConfig.createConnectionConfig()); BeanDefinition factoryDefinition = factoryBuilder.getBeanDefinition(); String factoryName = parserContext.getReaderContext().generateBeanName(factoryDefinition); BeanDefinitionHolder factoryHolder = new BeanDefinitionHolder(factoryDefinition, factoryName); registerBeanDefinition(factoryHolder, parserContext.getRegistry()); // set the factory on the listener bean builder.getRawBeanDefinition().setFactoryBeanName(factoryName); builder.getRawBeanDefinition().setFactoryMethodName("createServer"); } /** * Parse the "messages" element */ private MessageResource parseMessageResource(final Element childElm, final ParserContext parserContext, final BeanDefinitionBuilder builder) { MessageResourceFactory mr = new MessageResourceFactory(); if (StringUtils.hasText(childElm.getAttribute("languages"))) { String langString = childElm.getAttribute("languages"); String[] languages = langString.split("[\\s,]+"); mr.setLanguages(Arrays.asList(languages)); } if (StringUtils.hasText(childElm.getAttribute("directory"))) { mr.setCustomMessageDirectory(new File(childElm.getAttribute("directory"))); } return mr.createMessageResource(); } /** * Parse the "ftplets" element */ private Map<?, ?> parseFtplets(final Element childElm, final ParserContext parserContext, final BeanDefinitionBuilder builder) { List<Element> childs = SpringUtil.getChildElements(childElm); if (childs.size() > 0 && childs.get(0).getLocalName().equals("map")) { // using a beans:map element return parserContext.getDelegate().parseMapElement(childs.get(0), builder.getBeanDefinition()); } else { ManagedMap ftplets = new ManagedMap(); for (Element ftpletElm : childs) { ftplets.put(ftpletElm.getAttribute("name"), SpringUtil.parseSpringChildElement(ftpletElm, parserContext, builder)); } return ftplets; } } /** * Parse listeners elements */ @SuppressWarnings("unchecked") private Map<?, ?> parseListeners(final Element listenersElm, final ParserContext parserContext, final BeanDefinitionBuilder builder) { ManagedMap listeners = new ManagedMap(); List<Element> childs = SpringUtil.getChildElements(listenersElm); for (Element listenerElm : childs) { Object listener = null; String ln = listenerElm.getLocalName(); if ("nio-listener".equals(ln)) { listener = parserContext.getDelegate().parseCustomElement(listenerElm, builder.getBeanDefinition()); } else if ("listener".equals(ln)) { listener = SpringUtil.parseSpringChildElement(listenerElm, parserContext, builder); } else { throw new FtpServerConfigurationException("Unknown listener element " + ln); } String name = listenerElm.getAttribute("name"); listeners.put(name, listener); } return listeners; } }