com.glaf.template.config.TemplateConfig.java Source code

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Here is the source code for com.glaf.template.config.TemplateConfig.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.template.config;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.List;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.atomic.AtomicBoolean;

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

import com.glaf.core.config.SystemProperties;
import com.glaf.core.util.IOUtils;
import com.glaf.template.Template;
import com.glaf.template.TemplateReader;

public class TemplateConfig {
    private static Log logger = LogFactory.getLog(TemplateConfig.class);

    private static ConcurrentMap<String, Template> concurrentMap = new ConcurrentHashMap<String, Template>();

    private static AtomicBoolean loading = new AtomicBoolean(false);

    static {
        try {
            reload();
        } catch (Exception ex) {
        }
    }

    public static Template getTemplate(String key) {
        if (key == null) {
            throw new RuntimeException(" template key is null ");
        }
        Template template = concurrentMap.get(key.toLowerCase());
        if (template == null) {
            if (concurrentMap.isEmpty()) {
                reload();
            }
            template = concurrentMap.get(key.toLowerCase());
        }
        return template;
    }

    public static void reload() {
        if (!loading.get()) {
            InputStream inputStream = null;
            try {
                loading.set(true);
                String config = SystemProperties.getConfigRootPath() + "/conf/templates/";
                logger.debug("load config dir:" + config);
                File directory = new File(config);
                if (directory.exists() && directory.isDirectory()) {
                    TemplateReader reader = new TemplateReader();
                    String[] filelist = directory.list();
                    if (filelist != null) {
                        for (int i = 0, len = filelist.length; i < len; i++) {
                            String filename = config + filelist[i];
                            File file = new File(filename);
                            if (file.isFile() && file.getName().endsWith(".xml")) {
                                logger.debug("read config:" + filename);
                                inputStream = new FileInputStream(file);
                                List<Template> templates = reader.readTemplates(inputStream);
                                if (templates != null && !templates.isEmpty()) {
                                    for (Template template : templates) {
                                        if (template.getName() != null) {
                                            concurrentMap.put(template.getName().toLowerCase(), template);
                                        }
                                        if (template.getTemplateId() != null) {
                                            concurrentMap.put(template.getTemplateId().toLowerCase(), template);
                                        }
                                    }
                                }
                                IOUtils.closeStream(inputStream);
                            }
                        }
                    }
                }
            } catch (Exception ex) {
                ex.printStackTrace();
                logger.error(ex);
            } finally {
                loading.set(false);
                IOUtils.closeStream(inputStream);
            }
        }
    }

    private TemplateConfig() {

    }

}