com.glaf.core.context.ContextFactory.java Source code

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Here is the source code for com.glaf.core.context.ContextFactory.java

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/*
 * 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 com.glaf.core.context;

import org.apache.commons.lang3.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.glaf.core.config.BaseConfiguration;
import com.glaf.core.config.Configuration;
import com.glaf.core.config.SystemProperties;
import com.glaf.core.util.Constants;
import org.springframework.context.support.FileSystemXmlApplicationContext;

public final class ContextFactory {
    private static Configuration conf = BaseConfiguration.create();

    private static volatile org.springframework.context.ApplicationContext ctx;

    private static Log logger = LogFactory.getLog(ContextFactory.class);

    public static org.springframework.context.ApplicationContext getApplicationContext() {
        return ctx;
    }

    @SuppressWarnings("unchecked")
    public static <T> T getBean(Class<?> clazz) {
        if (ctx == null) {
            throw new RuntimeException(" Spring context is null, please check your spring config.");
        }
        String name = clazz.getSimpleName();
        name = name.substring(0, 1).toLowerCase() + name.substring(1);
        return (T) ctx.getBean(name);
    }

    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) {
        if (ctx == null) {
            init();
        }
        if (ctx == null) {
            throw new RuntimeException(" Spring context is null, please check your spring config.");
        }
        return (T) ctx.getBean(name);
    }

    public static boolean hasBean(String name) {
        if (ctx == null) {
            init();
        }
        if (ctx == null) {
            throw new RuntimeException(" Spring context is null, please check your spring config.");
        }
        return ctx.containsBean(name);
    }

    protected static void init() {
        reload();
    }

    public static void reload() {
        logger.info("?......");
        if (ctx == null) {
            try {
                if (StringUtils.isNotEmpty(conf.get("spring-config"))) {
                    String filename = SystemProperties.getConfigRootPath() + conf.get("spring-config");
                    logger.info("load custom spring config:" + filename);
                    if (filename.startsWith("/")) {
                        filename = "/" + filename;// For linux
                    }
                    ctx = new FileSystemXmlApplicationContext(filename);
                } else if (StringUtils.isNotEmpty(conf.get("spring-config-file"))) {
                    String filename = conf.get("spring-config-file");
                    logger.info("load custom spring config:" + filename);
                    if (filename.startsWith("/")) {
                        filename = "/" + filename;// For linux
                    }
                    ctx = new FileSystemXmlApplicationContext(filename);
                } else if (StringUtils.isNotEmpty(System.getProperty("spring-config-file"))) {
                    String filename = System.getProperty("spring-config-file");
                    logger.info("load custom spring config:" + filename);
                    if (filename.startsWith("/")) {
                        filename = "/" + filename;// For linux
                    }
                    ctx = new FileSystemXmlApplicationContext(filename);
                } else {
                    String filename = SystemProperties.getConfigRootPath() + Constants.SPRING_APPLICATION_CONTEXT;
                    logger.info("load default spring config:" + filename);
                    ctx = new FileSystemXmlApplicationContext(filename);
                }
            } catch (Exception ex) {
                ex.printStackTrace();
                logger.error(ex);
            }
        }
    }

    public static void setContext(org.springframework.context.ApplicationContext context) {
        if (context != null) {
            ctx = context;
        }
    }

    public static void main(String[] args) {
        System.out.println(ContextFactory.hasBean("dataSource"));
    }

}