| /* |
| * 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.cloudstack.spring.lifecycle.registry; |
| |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Properties; |
| import java.util.Set; |
| |
| import org.apache.log4j.Logger; |
| import org.springframework.beans.BeansException; |
| import org.springframework.beans.factory.config.BeanPostProcessor; |
| import org.springframework.context.ApplicationContext; |
| import org.springframework.context.ApplicationContextAware; |
| import org.springframework.context.SmartLifecycle; |
| import org.springframework.util.StringUtils; |
| |
| import com.cloud.utils.component.Registry; |
| |
| public class RegistryLifecycle implements BeanPostProcessor, SmartLifecycle, ApplicationContextAware { |
| |
| private static final Logger log = Logger.getLogger(RegistryLifecycle.class); |
| |
| public static final String EXTENSION_EXCLUDE = "extensions.exclude"; |
| public static final String EXTENSION_INCLUDE_PREFIX = "extensions.include."; |
| |
| Registry<Object> registry; |
| |
| /* The bean name works around circular dependency issues in Spring. This shouldn't be |
| * needed if your beans are already nicely organized. If they look like spaghetti, then you |
| * can use this. |
| */ |
| String registryBeanName; |
| Set<Object> beans = new HashSet<Object>(); |
| Class<?> typeClass; |
| ApplicationContext applicationContext; |
| Set<String> excludes = null; |
| |
| @Override |
| public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException { |
| if (typeClass.isAssignableFrom(bean.getClass()) && !isExcluded(bean)) { |
| beans.add(bean); |
| } |
| |
| return bean; |
| } |
| |
| protected synchronized boolean isExcluded(Object bean) { |
| String name = RegistryUtils.getName(bean); |
| |
| if (excludes == null) { |
| loadExcluded(); |
| } |
| |
| boolean result = excludes.contains(name); |
| if (result) { |
| log.info("Excluding extension [" + name + "] based on configuration"); |
| } |
| |
| return result; |
| } |
| |
| protected synchronized void loadExcluded() { |
| Properties props = applicationContext.getBean("DefaultConfigProperties", Properties.class); |
| excludes = new HashSet<String>(); |
| for (String exclude : props.getProperty(EXTENSION_EXCLUDE, "").trim().split("\\s*,\\s*")) { |
| if (StringUtils.hasText(exclude)) { |
| excludes.add(exclude); |
| } |
| } |
| |
| for (String key : props.stringPropertyNames()) { |
| if (key.startsWith(EXTENSION_INCLUDE_PREFIX)) { |
| String module = key.substring(EXTENSION_INCLUDE_PREFIX.length()); |
| boolean include = props.getProperty(key).equalsIgnoreCase("true"); |
| if (!include) { |
| excludes.add(module); |
| } |
| } |
| } |
| } |
| |
| @Override |
| public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException { |
| return bean; |
| } |
| |
| @Override |
| public void start() { |
| Iterator<Object> iter = beans.iterator(); |
| Registry<Object> registry = lookupRegistry(); |
| |
| while (iter.hasNext()) { |
| Object next = iter.next(); |
| if (registry.register(next)) { |
| log.debug("Registered " + next); |
| } else { |
| iter.remove(); |
| } |
| } |
| } |
| |
| @Override |
| public void stop() { |
| Registry<Object> registry = lookupRegistry(); |
| |
| for (Object bean : beans) { |
| registry.unregister(bean); |
| } |
| |
| beans.clear(); |
| } |
| |
| @Override |
| public boolean isRunning() { |
| return false; |
| } |
| |
| @Override |
| public int getPhase() { |
| return 2000; |
| } |
| |
| @Override |
| public boolean isAutoStartup() { |
| return true; |
| } |
| |
| @Override |
| public void stop(Runnable callback) { |
| stop(); |
| callback.run(); |
| } |
| |
| @Override |
| public void setApplicationContext(ApplicationContext applicationContext) throws BeansException { |
| this.applicationContext = applicationContext; |
| } |
| |
| @SuppressWarnings("unchecked") |
| protected Registry<Object> lookupRegistry() { |
| return registry == null ? applicationContext.getBean(registryBeanName, Registry.class) : registry; |
| } |
| |
| public Registry<Object> getRegistry() { |
| return registry; |
| } |
| |
| public void setRegistry(Registry<Object> registry) { |
| this.registry = registry; |
| } |
| |
| public Class<?> getTypeClass() { |
| return typeClass; |
| } |
| |
| public void setTypeClass(Class<?> typeClass) { |
| this.typeClass = typeClass; |
| } |
| |
| public String getRegistryBeanName() { |
| return registryBeanName; |
| } |
| |
| public void setRegistryBeanName(String registryBeanName) { |
| this.registryBeanName = registryBeanName; |
| } |
| |
| } |