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JFinal is a simple, light, rapid,independent, extensible Java WEB + ORM framework. The feature of JFinal looks like ruby on rails especially ActiveRecord.
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/**
 * Copyright (c) 2011-2021, James Zhan 詹波 ([email protected]).
 *
 * 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 com.jfinal.core;

import java.util.List;
import com.jfinal.config.Constants;
import com.jfinal.config.JFinalConfig;
import com.jfinal.config.Routes;
import com.jfinal.config.Plugins;
import com.jfinal.config.Handlers;
import com.jfinal.config.Interceptors;
import com.jfinal.kit.PathKit;
import com.jfinal.kit.StrKit;
import com.jfinal.log.Log;
import com.jfinal.log.LogManager;
import com.jfinal.plugin.IPlugin;
import com.jfinal.template.Engine;

class Config {
	
	private static final Constants constants = new Constants();
	private static final Routes routes = new Routes(){public void config() {}};
	private static final Engine engine = new Engine("JFinal Web");
	private static final Plugins plugins = new Plugins();
	private static final Interceptors interceptors = new Interceptors();
	private static final Handlers handlers = new Handlers();
	private static Log log;
	
	// prevent new Config();
	private Config() {
	}
	
	/*
	 * Config order: constant, interceptor, route, plugin, engine, handler
	 */
	static void configJFinal(JFinalConfig jfinalConfig) {
		jfinalConfig.configConstant(constants);			initLogFactory();	initEngine();
		
		configPluginWithOrder(1, jfinalConfig);
		jfinalConfig.configInterceptor(interceptors);
		
		configPluginWithOrder(2, jfinalConfig);
		jfinalConfig.configRoute(routes);
		
		configPluginWithOrder(3, jfinalConfig);
		jfinalConfig.configEngine(engine);
		
		configPluginWithOrder(4, jfinalConfig);
		jfinalConfig.configHandler(handlers);
		
		configPluginWithOrder(5, jfinalConfig);
	}
	
	private static void configPluginWithOrder(int order, JFinalConfig jfinalConfig) {
		if (order == constants.getConfigPluginOrder()) {
			jfinalConfig.configPlugin(plugins);
			startPlugins();		// very important!!!
		}
	}
	
	/**
	 * Set the default base template path and devMode by JFinal before configEngine(engine) invoked
	 * They can be reconfigured in configEngine(engine)
	 */
	private static void initEngine() {
		engine.setDevMode(constants.getDevMode());
		
		// 避免在某些环境下 webRootPath 值为 blank 时无法启动项目
		if (StrKit.notBlank(PathKit.getWebRootPath())) {
			engine.setBaseTemplatePath(PathKit.getWebRootPath());
		}
	}
	
	public static final Constants getConstants() {
		return constants;
	}
	
	public static final Routes getRoutes() {
		return routes;
	}
	
	public static final Engine getEngine() {
		return engine;
	}
	
	public static final Plugins getPlugins() {
		return plugins;
	}
	
//	public static final Interceptors getInterceptors() {
//		return interceptors;
//	}
	
	public static Handlers getHandlers() {
		return handlers;
	}
	
	private static void startPlugins() {
		List pluginList = plugins.getPluginList();
		if (pluginList == null) {
			return ;
		}
		
		for (IPlugin plugin : pluginList) {
			try {
				// process ActiveRecordPlugin devMode
				if (plugin instanceof com.jfinal.plugin.activerecord.ActiveRecordPlugin) {
					com.jfinal.plugin.activerecord.ActiveRecordPlugin arp = (com.jfinal.plugin.activerecord.ActiveRecordPlugin)plugin;
					if (arp.getDevMode() == null) {
						arp.setDevMode(constants.getDevMode());
					}
				}
				
				if (plugin.start() == false) {
					String message = "Plugin start error: " + plugin.getClass().getName();
					log.error(message);
					throw new RuntimeException(message);
				}
			}
			catch (Exception e) {
				String message = "Plugin start error: " + plugin.getClass().getName() + ". \n" + e.getMessage();
				log.error(message, e);
				throw new RuntimeException(message, e);
			}
		}
	}
	
	private static void initLogFactory() {
		LogManager.me().init();
		log = Log.getLog(Config.class);
		JFinalFilter.initLog();
	}
}