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/* * Copyright 2013-2015 the original author or authors. * * Licensed 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.springframework.cloud.netflix.archaius; import static com.netflix.config.ConfigurationManager.APPLICATION_PROPERTIES; import static com.netflix.config.ConfigurationManager.DISABLE_DEFAULT_ENV_CONFIG; import static com.netflix.config.ConfigurationManager.DISABLE_DEFAULT_SYS_CONFIG; import static com.netflix.config.ConfigurationManager.ENV_CONFIG_NAME; import static com.netflix.config.ConfigurationManager.SYS_CONFIG_NAME; import static com.netflix.config.ConfigurationManager.URL_CONFIG_NAME; import java.lang.reflect.Field; import java.util.List; import java.util.concurrent.atomic.AtomicBoolean; import javax.annotation.PreDestroy; import lombok.extern.apachecommons.CommonsLog; import org.apache.commons.configuration.AbstractConfiguration; import org.apache.commons.configuration.ConfigurationBuilder; import org.apache.commons.configuration.EnvironmentConfiguration; import org.apache.commons.configuration.SystemConfiguration; import org.apache.commons.configuration.event.ConfigurationEvent; import org.apache.commons.configuration.event.ConfigurationListener; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.boot.actuate.endpoint.Endpoint; import org.springframework.boot.autoconfigure.condition.ConditionalOnClass; import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty; import org.springframework.cloud.context.environment.EnvironmentChangeEvent; import org.springframework.context.ApplicationListener; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.core.env.ConfigurableEnvironment; import org.springframework.core.env.Environment; import org.springframework.util.ReflectionUtils; import com.netflix.config.AggregatedConfiguration; import com.netflix.config.ConcurrentCompositeConfiguration; import com.netflix.config.ConfigurationManager; import com.netflix.config.DeploymentContext; import com.netflix.config.DynamicPropertyFactory; import com.netflix.config.DynamicURLConfiguration; /** * @author Spencer Gibb */ @Configuration @ConditionalOnClass({ ConcurrentCompositeConfiguration.class, ConfigurationBuilder.class }) @CommonsLog public class ArchaiusAutoConfiguration { private static final AtomicBoolean initialized = new AtomicBoolean(false); @Autowired private ConfigurableEnvironment env; @Autowired private List<AbstractConfiguration> externalConfigurations; @PreDestroy public void close() { setStatic(ConfigurationManager.class, "instance", null); setStatic(ConfigurationManager.class, "customConfigurationInstalled", false); setStatic(DynamicPropertyFactory.class, "config", null); setStatic(DynamicPropertyFactory.class, "initializedWithDefaultConfig", false); initialized.compareAndSet(true, false); } @Bean public ConfigurableEnvironmentConfiguration configurableEnvironmentConfiguration() { ConfigurableEnvironmentConfiguration envConfig = new ConfigurableEnvironmentConfiguration(this.env); configureArchaius(envConfig); return envConfig; } @Configuration @ConditionalOnClass(Endpoint.class) protected static class ArchaiusEndpointConfiguration { @Bean protected ArchaiusEndpoint archaiusEndpoint() { return new ArchaiusEndpoint(); } } @Configuration @ConditionalOnProperty(value = "archaius.propagate.environmentChangedEvent", matchIfMissing = true) @ConditionalOnClass(EnvironmentChangeEvent.class) protected static class PropagateEventsConfiguration implements ApplicationListener<EnvironmentChangeEvent> { @Autowired private Environment env; @Override public void onApplicationEvent(EnvironmentChangeEvent event) { AbstractConfiguration manager = ConfigurationManager.getConfigInstance(); for (String key : event.getKeys()) { for (ConfigurationListener listener : manager.getConfigurationListeners()) { Object source = event.getSource(); // TODO: Handle add vs set vs delete? int type = AbstractConfiguration.EVENT_SET_PROPERTY; String value = env.getProperty(key); boolean beforeUpdate = false; listener.configurationChanged(new ConfigurationEvent(source, type, key, value, beforeUpdate)); } } } } protected void configureArchaius(ConfigurableEnvironmentConfiguration envConfig) { if (initialized.compareAndSet(false, true)) { String appName = this.env.getProperty("spring.application.name"); if (appName == null) { appName = "application"; log.warn("No spring.application.name found, defaulting to 'application'"); } System.setProperty(DeploymentContext.ContextKey.appId.getKey(), appName); ConcurrentCompositeConfiguration config = new ConcurrentCompositeConfiguration(); // support to add other Configurations (Jdbc, DynamoDb, Zookeeper, jclouds, // etc...) if (externalConfigurations != null) { for (AbstractConfiguration externalConfig : externalConfigurations) { config.addConfiguration(externalConfig); } } config.addConfiguration(envConfig, ConfigurableEnvironmentConfiguration.class.getSimpleName()); // below come from ConfigurationManager.createDefaultConfigInstance() DynamicURLConfiguration defaultURLConfig = new DynamicURLConfiguration(); try { config.addConfiguration(defaultURLConfig, URL_CONFIG_NAME); } catch (Throwable ex) { log.error("Cannot create config from " + defaultURLConfig, ex); } // TODO: sys/env above urls? if (!Boolean.getBoolean(DISABLE_DEFAULT_SYS_CONFIG)) { SystemConfiguration sysConfig = new SystemConfiguration(); config.addConfiguration(sysConfig, SYS_CONFIG_NAME); } if (!Boolean.getBoolean(DISABLE_DEFAULT_ENV_CONFIG)) { EnvironmentConfiguration environmentConfiguration = new EnvironmentConfiguration(); config.addConfiguration(environmentConfiguration, ENV_CONFIG_NAME); } ConcurrentCompositeConfiguration appOverrideConfig = new ConcurrentCompositeConfiguration(); config.addConfiguration(appOverrideConfig, APPLICATION_PROPERTIES); config.setContainerConfigurationIndex(config.getIndexOfConfiguration(appOverrideConfig)); addArchaiusConfiguration(config); } else { // TODO: reinstall ConfigurationManager log.warn("Netflix ConfigurationManager has already been installed, unable to re-install"); } } private void addArchaiusConfiguration(ConcurrentCompositeConfiguration config) { if (ConfigurationManager.isConfigurationInstalled()) { AbstractConfiguration installedConfiguration = ConfigurationManager.getConfigInstance(); if (installedConfiguration instanceof ConcurrentCompositeConfiguration) { ConcurrentCompositeConfiguration configInstance = (ConcurrentCompositeConfiguration) installedConfiguration; configInstance.addConfiguration(config); } else { installedConfiguration.append(config); if (!(installedConfiguration instanceof AggregatedConfiguration)) { log.warn( "Appending a configuration to an existing non-aggregated installed configuration will have no effect"); } } } else { ConfigurationManager.install(config); } } private static void setStatic(Class<?> type, String name, Object value) { // Hack a private static field Field field = ReflectionUtils.findField(type, name); ReflectionUtils.makeAccessible(field); ReflectionUtils.setField(field, null, value); } }